From 8ebbd705a4f899ab0c094ddd6cd7f47e67061150 Mon Sep 17 00:00:00 2001
From: Thomas Buck <xythobuz@xythobuz.de>
Date: Fri, 13 Mar 2015 01:25:27 +0100
Subject: [PATCH] Main menu rewrite as imgui window

---
 ChangeLog.md                                 |    5 +
 README.md                                    |    4 +-
 include/Game.h                               |    3 +-
 include/Menu.h                               |   59 +-
 include/MenuFolder.h                         |   52 -
 include/Script.h                             |    6 +-
 include/utils/strings.h                      |    6 +
 src/CMakeLists.txt                           |    1 -
 src/Game.cpp                                 |    6 +-
 src/Menu.cpp                                 |  321 ++--
 src/MenuFolder.cpp                           |  215 ---
 src/Render.cpp                               |    5 +
 src/Script.cpp                               |   22 +-
 src/TextureManager.cpp                       |    4 +
 src/UI.cpp                                   |   70 +-
 src/deps/imgui/imconfig.h                    |   22 +-
 src/deps/imgui/imgui_user.h                  |    2 +
 src/deps/imgui/imgui_user.inl                |    2 +
 src/deps/imguifilesystem/README.txt          |   13 +
 src/deps/imguifilesystem/dirent_portable.h   | 1040 +++++++++++
 src/deps/imguifilesystem/imguifilesystem.cpp | 1655 ++++++++++++++++++
 src/deps/imguifilesystem/imguifilesystem.h   |   95 +
 src/loader/LoaderTR2.cpp                     |   22 +-
 src/main.cpp                                 |   25 +-
 src/utils/strings.cpp                        |   30 +
 25 files changed, 3143 insertions(+), 542 deletions(-)
 delete mode 100644 include/MenuFolder.h
 delete mode 100644 src/MenuFolder.cpp
 create mode 100755 src/deps/imgui/imgui_user.h
 create mode 100755 src/deps/imgui/imgui_user.inl
 create mode 100644 src/deps/imguifilesystem/README.txt
 create mode 100644 src/deps/imguifilesystem/dirent_portable.h
 create mode 100644 src/deps/imguifilesystem/imguifilesystem.cpp
 create mode 100644 src/deps/imguifilesystem/imguifilesystem.h

diff --git a/ChangeLog.md b/ChangeLog.md
index 64873b14..c0222003 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -2,6 +2,11 @@
 
 ## OpenRaider (0.1.3) xythobuz <xythobuz@xythobuz.de>
 
+    [ 20140312 ]
+    * Now including imguifilesystem dependency
+    * Completely re-wrote Main menu, now reading TOMBPC.DAT scripts
+    * Main menu is now just a full-screen ImGui window
+
     [ 20140310 ]
     * Tried to fix moveable loading. Fixed TR1 angle parser, but still not working better.
 
diff --git a/README.md b/README.md
index a88ed0fe..3641c2e3 100644
--- a/README.md
+++ b/README.md
@@ -187,5 +187,7 @@ See the respective files in `cmake` for their licensing.
 
 The [clibs/commander](https://github.com/clibs/commander) dependency is Copyright (c) 2012 TJ Holowaychuk (tj@vision-media.ca) and licensed under the [MIT License](http://opensource.org/licenses/MIT).
 
-The included GUI lib, [imgui](https://github.com/ocornut/imgui/) is Copyright (c) 2014 Omar Cornut. See src/deps/imgui/LICENSE for more informations about the MIT license used.
+The included GUI lib, [imgui](https://github.com/ocornut/imgui/) is Copyright (c) 2014 Omar Cornut. See src/deps/imgui/LICENSE for more informations about the MIT license used. 
+
+Also included is the imgui addon [imguifilesystem by Flix01](https://gist.github.com/Flix01/f34b5efa91e50a241c1b).
 
diff --git a/include/Game.h b/include/Game.h
index 7dcc0e18..77d63290 100644
--- a/include/Game.h
+++ b/include/Game.h
@@ -9,7 +9,6 @@
 #define _GAME_H_
 
 #include <string>
-#include <vector>
 
 #include "Entity.h"
 
@@ -18,7 +17,7 @@ class Game {
     static void destroy();
 
     static bool isLoaded() { return mLoaded; }
-    static int loadLevel(const char* level);
+    static int loadLevel(std::string level);
 
     static void handleAction(ActionEvents action, bool isFinished);
     static void handleMouseMotion(int xrel, int yrel, int xabs, int yabs);
diff --git a/include/Menu.h b/include/Menu.h
index 6e5351b7..0fbd7e5b 100644
--- a/include/Menu.h
+++ b/include/Menu.h
@@ -1,6 +1,6 @@
 /*!
  * \file include/Menu.h
- * \brief Menu 'overlay' interface
+ * \brief Main Menu
  *
  * \author xythobuz
  */
@@ -8,57 +8,30 @@
 #ifndef _MENU_H_
 #define _MENU_H_
 
-#include <functional>
+#include <vector>
+
+#include "Script.h"
+#include "utils/Folder.h"
 
 class Menu {
   public:
+    static int initialize();
+    static void shutdown();
+    static void display();
 
-    virtual ~Menu() { }
-
-    virtual int initialize() = 0;
-
-    virtual void display() = 0;
-
-    virtual void handleKeyboard(KeyboardButton key, bool pressed) = 0;
-
-    virtual void handleMouseClick(unsigned int x, unsigned int y,
-                                  KeyboardButton button, bool released) = 0;
-
-    virtual void handleMouseScroll(int xrel, int yrel) = 0;
-
-    bool isVisible() { return visible; }
-
-    void setVisible(bool v) { visible = v; }
+    static bool isVisible() { return visible; }
+    static void setVisible(bool v) { visible = v; }
 
     static const glm::vec4 textColor;
     static const glm::vec4 selectedColor;
 
-  protected:
-
-    virtual void showDialog(std::string msg, std::string btn1, std::string btn2 = "",
-                            std::function<int (bool state)> callback = std::function<int (bool)>());
-
-    virtual void ackDialog();
-
-    virtual bool handleKeyboardDialog(KeyboardButton key, bool pressed);
-
-    virtual bool handleMouseClickDialog(unsigned int x, unsigned int y,
-                                        KeyboardButton button, bool released);
-
-    virtual bool handleMouseScrollDialog(int xrel, int yrel);
-
-    virtual void displayDialog();
-
-    bool dialogState;
-    std::string dialogText;
-    std::string dialogButton1;
-    std::string dialogButton2;
-    std::function<int (bool state)> dialogFunction;
-
-    bool visible;
+  private:
+    static bool visible;
+    static Folder* mapFolder;
+    static std::vector<Script> scripts;
+    static std::vector<Folder> paths;
+    static std::vector<int> images;
 };
 
-Menu& getMenu();
-
 #endif
 
diff --git a/include/MenuFolder.h b/include/MenuFolder.h
deleted file mode 100644
index 25400a18..00000000
--- a/include/MenuFolder.h
+++ /dev/null
@@ -1,52 +0,0 @@
-/*!
- * \file include/MenuFolder.h
- * \brief File-Explorer like Menu
- *
- * \author xythobuz
- */
-
-#ifndef _MENU_FOLDER_H_
-#define _MENU_FOLDER_H_
-
-#include "Menu.h"
-#include "utils/Folder.h"
-
-/*!
- * \brief Menu 'overlay'
- */
-class MenuFolder : public Menu {
-  public:
-
-    /*!
-     * \brief Constructs an object of MenuFolder
-     */
-    MenuFolder();
-
-    /*!
-     * \brief Deconstructs an object of MenuFolder
-     */
-    virtual ~MenuFolder();
-
-    virtual int initialize();
-
-    virtual void display();
-    virtual void handleKeyboard(KeyboardButton key, bool pressed);
-    virtual void handleMouseClick(unsigned int x, unsigned int y,
-                                  KeyboardButton button, bool released);
-    virtual void handleMouseScroll(int xrel, int yrel);
-
-  private:
-
-    int init(std::string s);
-    int init(Folder* folder, bool filter = true);
-    virtual void loadOrOpen();
-
-    long mCursor;
-    long mMin;
-
-    Folder* mapFolder;
-    bool hiddenState;
-};
-
-#endif
-
diff --git a/include/Script.h b/include/Script.h
index 64e35b00..9363f3d5 100644
--- a/include/Script.h
+++ b/include/Script.h
@@ -91,9 +91,8 @@ class Script {
     } ScriptItem;
 
     Script();
-    ~Script();
 
-    int load(const char* file);
+    int load(std::string file);
 
     unsigned int levelCount();
     std::string getLevelName(unsigned int i);
@@ -124,6 +123,9 @@ class Script {
     void registerScriptHandler(ScriptOpCode op, std::function<int (bool, uint16_t)> func);
     int runScript(unsigned int level);
 
+    std::string getDescription() { return description; }
+    std::string getLanguage();
+
   private:
 
     typedef enum {
diff --git a/include/utils/strings.h b/include/utils/strings.h
index 04c5b468..645b3354 100644
--- a/include/utils/strings.h
+++ b/include/utils/strings.h
@@ -16,5 +16,11 @@ std::string expandHomeDirectory(std::string s);
 
 bool stringEndsWith(std::string s, std::string suffix, bool casesensitive = false);
 
+std::string removeLastPathElement(std::string s);
+
+std::string getLastPathElement(std::string s);
+
+std::string convertPathDelimiter(std::string s);
+
 #endif
 
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index ef35557f..e3a288b3 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -63,7 +63,6 @@ set (SRCS ${SRCS} "Game.cpp" "../include/Game.h")
 set (SRCS ${SRCS} "Log.cpp" "../include/Log.h")
 set (SRCS ${SRCS} "main.cpp")
 set (SRCS ${SRCS} "Menu.cpp" "../include/Menu.h")
-set (SRCS ${SRCS} "MenuFolder.cpp" "../include/MenuFolder.h")
 set (SRCS ${SRCS} "Mesh.cpp" "../include/Mesh.h")
 set (SRCS ${SRCS} "Render.cpp" "../include/Render.h")
 set (SRCS ${SRCS} "Room.cpp" "../include/Room.h")
diff --git a/src/Game.cpp b/src/Game.cpp
index c2d370ed..511d242e 100644
--- a/src/Game.cpp
+++ b/src/Game.cpp
@@ -11,6 +11,7 @@
 #include "Game.h"
 #include "loader/Loader.h"
 #include "Log.h"
+#include "Menu.h"
 #include "Render.h"
 #include "SoundManager.h"
 #include "TextureManager.h"
@@ -37,7 +38,7 @@ void Game::destroy() {
     getWorld().destroy();
 }
 
-int Game::loadLevel(const char* level) {
+int Game::loadLevel(std::string level) {
     destroy();
 
     Log::get(LOG_INFO) << "Loading " << level << Log::endl;
@@ -63,11 +64,10 @@ int Game::loadLevel(const char* level) {
 
         mLoaded = true;
         Render::setMode(RenderMode::Texture);
+        Menu::setVisible(false);
 
         if (mLara == -1) {
             Log::get(LOG_WARNING) << "Can't find Lara entity in level?!" << Log::endl;
-            Console::setVisible(true);
-            UI::setVisible(true);
         } else {
             Camera::setPosition(glm::vec3(getLara().getPosition().x,
                                           getLara().getPosition().y - 1024.0f,
diff --git a/src/Menu.cpp b/src/Menu.cpp
index 4d4f8599..14d20fdc 100644
--- a/src/Menu.cpp
+++ b/src/Menu.cpp
@@ -1,173 +1,230 @@
 /*!
  * \file src/Menu.cpp
- * \brief Menu 'overlay'
+ * \brief Main Menu
  *
  * \author xythobuz
  */
 
+#include "imgui/imgui.h"
+
 #include "global.h"
+#include "Console.h"
+#include "Game.h"
 #include "Log.h"
-#include "Menu.h"
+#include "RunTime.h"
+#include "UI.h"
+#include "TextureManager.h"
 #include "system/Font.h"
 #include "system/Window.h"
+#include "utils/random.h"
+#include "utils/strings.h"
+#include "Menu.h"
 
 const glm::vec4 Menu::textColor(0.5f, 0.7f, 1.0f, 1.0f);
 const glm::vec4 Menu::selectedColor(1.0f, 0.0f, 0.0f, 1.0f);
 
-void Menu::showDialog(std::string msg, std::string btn1, std::string btn2,
-                      std::function<int (bool state)> callback) {
-    // Only show one dialog at a time
-    assertEqual(dialogText.length(), 0);
-    assertEqual(dialogButton1.length(), 0);
-    assertEqual(dialogButton2.length(), 0);
-
-    assertGreaterThan(msg.length(), 0);
-    assertGreaterThan(btn1.length(), 0);
-
-    dialogText = msg;
-    dialogButton1 = btn1;
-    dialogButton2 = btn2;
-    dialogState = false;
-    dialogFunction = callback;
+bool Menu::visible = false;
+Folder* Menu::mapFolder = nullptr;
+std::vector<Script> Menu::scripts;
+std::vector<Folder> Menu::paths;
+std::vector<int> Menu::images;
+
+int Menu::initialize() {
+    shutdown();
+    mapFolder = new Folder(RunTime::getPakDir());
+
+    std::vector<File> files;
+    mapFolder->findRecursiveFilesEndingWith(files, "tombpc.dat");
+    for (auto& f : files) {
+        scripts.emplace_back();
+        auto s = scripts.size() - 1;
+
+        images.push_back(-1);
+        auto i = images.size() - 1;
+
+        std::string path = convertPathDelimiter(removeLastPathElement(f.getPath()));
+        paths.emplace_back(path);
+        auto p = paths.size() - 1;
+
+        if (scripts.at(s).load(f.getPath()) != 0) {
+            Log::get(LOG_ERROR) << "Invalid Script: \"" << f.getPath()
+                                << "\"!" << Log::endl;
+            scripts.pop_back();
+        } else {
+            // Load one of the pictures of this level
+            std::vector<File> texFiles;
+            paths.at(p).findRecursiveFilesEndingWith(texFiles, ".pcx");
+            paths.at(p).findRecursiveFilesEndingWith(texFiles, ".bmp");
+            paths.at(p).findRecursiveFilesEndingWith(texFiles, ".png");
+            paths.at(p).findRecursiveFilesEndingWith(texFiles, ".tga");
+            paths.at(p).findRecursiveFilesEndingWith(texFiles, ".jpg");
+
+            if (texFiles.size() > 0) {
+                int which = randomInteger(texFiles.size() - 1);
+                images.at(i) = TextureManager::loadImage(texFiles.at(which).getPath(),
+                               TextureStorage::SYSTEM);
+            }
+        }
+    }
 
-    Log::get(LOG_USER) << dialogText << Log::endl;
+    return 0;
 }
 
-void Menu::ackDialog() {
-    dialogText = "";
-    dialogButton1 = "";
-    dialogButton2 = "";
-
-    if (dialogFunction) {
-        int error = dialogFunction(dialogState);
-        if (error != 0) {
-            showDialog("Error processing dialog callback!", "OK", "");
-        }
+void Menu::shutdown() {
+    if (mapFolder != nullptr) {
+        delete mapFolder;
+        mapFolder = nullptr;
     }
 
-    dialogState = false;
+    scripts.clear();
+    paths.clear();
+    images.clear(); //! \TODO free texture slots
 }
 
-bool Menu::handleKeyboardDialog(KeyboardButton key, bool pressed) {
-    if (!pressed)
-        return (dialogText.length() > 0);
+void Menu::display() {
+    if (!visible)
+        return;
 
-    if (dialogText.length() > 0) {
-        if (dialogButton2.length() == 0) {
-            if (key == enterKey) {
-                ackDialog();
-            }
-        } else {
-            if (key == enterKey) {
-                ackDialog();
-            } else if (key == leftKey) {
-                dialogState = !dialogState;
-            } else if (key == rightKey) {
-                dialogState = !dialogState;
-            } else if (key == upKey) {
-                dialogState = !dialogState;
-            } else if (key == downKey) {
-                dialogState = !dialogState;
-            }
+    glm::vec2 size = Window::getSize();
+    if (!ImGui::Begin("Menu", nullptr, ImVec2(size.x, size.y), -1.0f, ImGuiWindowFlags_NoTitleBar
+                      | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoCollapse
+                      | ImGuiWindowFlags_NoSavedSettings)) {
+        ImGui::End();
+        return;
+    }
+
+    ImGui::SetWindowPos(ImVec2(0, 0));
+    ImGui::SetWindowSize(ImVec2(size.x, size.y));
+
+    // Draw heading with version string
+    auto headingSize = ImGui::CalcTextSize(VERSION);
+    headingSize.x *= 3.0f; headingSize.y *= 3.0f;
+    ImGui::SetWindowFontScale(3.0f);
+    ImGui::SameLine(0, (size.x / 2) - (headingSize.x / 2));
+    ImGui::TextColored(textColor, VERSION);
+    ImGui::SetWindowFontScale(1.0f);
+
+    static ImGuiFs::Dialog* dialog = nullptr;
+    const bool browseButtonPressed = ImGui::Button("Select Level File");
+    if (browseButtonPressed) {
+        if (dialog != nullptr)
+            delete dialog;
+        dialog = new ImGuiFs::Dialog();
+    }
+    if (dialog) {
+        dialog->chooseFileDialog(browseButtonPressed, RunTime::getPakDir().c_str(),
+                                 ".phd;.psx;.tub;.tr2", nullptr, ImVec2(400, 300), ImGui::GetMousePos());
+        std::string selectedFile = dialog->getChosenPath();
+        if (selectedFile.length() > 0) {
+            Game::loadLevel(selectedFile);
+            delete dialog;
+            dialog = nullptr;
         }
-        return true;
+    }
+    ImGui::SameLine();
+    if (ImGui::Button("Toggle Console")) {
+        Console::setVisible(!Console::isVisible());
+    }
+    ImGui::SameLine();
+    if (ImGui::Button("Toggle Debug Window")) {
+        UI::setVisible(!UI::isVisible());
     }
 
-    return false;
-}
+    ImGui::Separator();
 
-bool Menu::handleMouseClickDialog(unsigned int x, unsigned int y,
-                                  KeyboardButton button, bool released) {
-    //! \todo Allow mouse usage of Menu dialogs!
-    return (dialogText.length() > 0);
-}
+    // Set up columns for game list
+    ImGui::Columns(3, "menuscripts");
+    static bool offsets = false;
+    if (!offsets) {
+        ImGui::SetColumnOffset(1, 140.0f);
+        ImGui::SetColumnOffset(2, size.x - 200.0f);
+        offsets = true;
+    }
 
-bool Menu::handleMouseScrollDialog(int xrel, int yrel) {
-    //! \todo Allow mouse usage of Menu dialogs!
-    return (dialogText.length() > 0);
-}
+    // List found games
+    for (int i = 0; i < scripts.size(); i++) {
+        ImGui::PushID(i);
+        Script& s = scripts.at(i);
 
-void Menu::displayDialog() {
-    if (dialogText.length() > 0) {
-        unsigned int wMax = ((unsigned int)(Window::getSize().x * 0.66f));
-
-        unsigned int w0 = Font::widthText(1.0f, dialogText) + 20;
-        if (w0 > wMax)
-            w0 = wMax;
-        unsigned int h0 =  Font::heightText(1.0f, w0, dialogText) + 10;
-
-        assertGreaterThan(dialogButton1.length(), 0);
-        unsigned int w1 = Font::widthText(1.0f, dialogButton1) + 20;
-        if (w1 > wMax)
-            w1 = wMax;
-        unsigned int h1 = Font::heightText(1.0f, w1, dialogButton1) + 10;
-
-        unsigned int wOverlay = wMax, hOverlay, w2 = 0;
-
-        if (dialogButton2.length() > 0) {
-            // Show text and two buttons
-            w2 = Font::widthText(1.0f, dialogButton2) + 20;
-            if (w2 > wMax)
-                w2 = wMax;
-            unsigned int h2 = Font::heightText(1.0f, w2, dialogButton2) + 10;
-
-            if (w0 > (w1 + w2)) {
-                if (w0 < wMax) {
-                    wOverlay = w0;
-                }
-            } else if (w0 < (w1 + w2)) {
-                if ((w1 + w2) < wMax) {
-                    wOverlay = (w1 + w2);
+        if (images.at(i) >= 0) {
+            auto bm = TextureManager::getBufferManager(images.at(i), TextureStorage::SYSTEM);
+            ImGui::Image(bm, ImVec2(128, 128));
+        }
+        ImGui::NextColumn();
+
+        ImGui::TextWrapped("Language: %s", s.getLanguage().c_str());
+        ImGui::TextWrapped("Description: %s", s.getDescription().c_str());
+
+        if (ImGui::TreeNode("", "%d Levels", s.levelCount())) {
+            for (int l = 0; l < s.levelCount(); l++) {
+                ImGui::PushID(l);
+                ImGui::Bullet();
+                ImGui::TextWrapped("%s (%s)", s.getLevelName(l).c_str(), s.getLevelFilename(l).c_str());
+                ImGui::SameLine();
+                if (ImGui::Button("Play level")) {
+                    std::vector<File> levelFiles;
+                    paths.at(i).findRecursiveFilesEndingWith(levelFiles,
+                            getLastPathElement(s.getLevelFilename(l)));
+                    if (levelFiles.size() == 0) {
+                        Log::get(LOG_ERROR) << "Could not find level \""
+                                            << getLastPathElement(s.getLevelFilename(l))
+                                            << "\"!" << Log::endl;
+                    } else {
+                        Game::loadLevel(levelFiles.at(0).getPath());
+                    }
                 }
+                ImGui::PopID();
             }
+            ImGui::TreePop();
+        }
 
-            if ((w1 + w2) <= wMax) {
-                hOverlay = h0 + ((h1 + h2) / 2);
-            } else {
-                hOverlay = h0 + h1 + h2;
+        if (ImGui::TreeNode("", "%d Cut-Scenes", s.cutsceneCount())) {
+            for (int c = 0; c < s.cutsceneCount(); c++) {
+                ImGui::Bullet();
+                ImGui::TextWrapped("%s", s.getCutsceneFilename(c).c_str());
             }
-        } else {
-            // Show text and one button
-            if (w0 > w1) {
-                if (w0 < wMax) {
-                    wOverlay = w0;
-                }
-            } else if (w0 < w1) {
-                if (w1 < wMax) {
-                    wOverlay = w1;
-                }
+            ImGui::TreePop();
+        }
+
+        if (ImGui::TreeNode("", "%d Videos", s.videoCount())) {
+            for (int v = 0; v < s.videoCount(); v++) {
+                ImGui::Bullet();
+                ImGui::TextWrapped("%s", s.getVideoFilename(v).c_str());
             }
+            ImGui::TreePop();
+        }
 
-            hOverlay = h0 + h1;
+        if (ImGui::TreeNode("", "%d Pictures", s.pictureCount())) {
+            for (int p = 0; p < s.pictureCount(); p++) {
+                ImGui::Bullet();
+                ImGui::TextWrapped("%s", s.getPictureFilename(p).c_str());
+            }
+            ImGui::TreePop();
         }
 
-        unsigned int xOverlay = (Window::getSize().x - wOverlay) / 2;
-        unsigned int yOverlay = (Window::getSize().y - hOverlay) / 2;
-
-        /*
-        glColor4f(0.0f, 0.0f, 0.0f, 0.75f);
-        glDisable(GL_TEXTURE_2D);
-        glRecti(xOverlay, yOverlay, xOverlay + wOverlay, yOverlay + hOverlay);
-        glEnable(GL_TEXTURE_2D);
-        */
-
-        Font::drawTextWrapped(xOverlay + 10, yOverlay + 5, 1.0f, textColor, w0, dialogText);
-        if (dialogButton2.length() > 0) {
-            if ((w1 + w2) <= wMax) {
-                Font::drawTextWrapped(xOverlay + 10, yOverlay + 10 + h0, 1.0f,
-                                      dialogState ? textColor : selectedColor, w1, dialogButton1);
-                Font::drawTextWrapped(xOverlay + 10 + w1, yOverlay + 10 + h0,
-                                      1.0f, dialogState ? selectedColor : textColor, w2, dialogButton2);
-            } else {
-                Font::drawTextWrapped((Window::getSize().x - w1) / 2,
-                                      yOverlay + 10 + h0, 1.0f, dialogState ? textColor : selectedColor, w1, dialogButton1);
-                Font::drawTextWrapped((Window::getSize().x - w2) / 2,
-                                      yOverlay + 10 + h0 + h1, 1.0f, dialogState ? selectedColor : textColor, w2, dialogButton2);
+        if (ImGui::TreeNode("", "%d Titles", s.titleCount())) {
+            for (int t = 0; t < s.titleCount(); t++) {
+                ImGui::Bullet();
+                ImGui::TextWrapped("%s", s.getTitleFilename(t).c_str());
             }
-        } else {
-            Font::drawTextWrapped((Window::getSize().x - w1) / 2,
-                                  yOverlay + 10 + h0, 1.0f, selectedColor, w1, dialogButton1);
+            ImGui::TreePop();
         }
+
+        ImGui::NextColumn();
+        ImGui::TextWrapped("Real Gameplay not yet implemented!");
+        ImGui::NextColumn();
+
+        if (i < (scripts.size() - 1))
+            ImGui::Separator();
+        ImGui::PopID();
+    }
+    ImGui::Columns(1);
+
+    if (scripts.size() == 0) {
+        ImGui::TextWrapped("OpenRaiders built-in TombRaider-Script detection mechanism could not find any suitable TR2/TR3 script files (called \"TOMBPC.DAT\") in your PAK folder \"%s\"! Use the \"Select Level File\" Button to load a single level without starting the entire game.",
+                           RunTime::getPakDir().c_str());
     }
+
+    ImGui::End();
 }
 
diff --git a/src/MenuFolder.cpp b/src/MenuFolder.cpp
deleted file mode 100644
index c6d90245..00000000
--- a/src/MenuFolder.cpp
+++ /dev/null
@@ -1,215 +0,0 @@
-/*!
- * \file src/MenuFolder.cpp
- * \brief File-Explorer like menu
- *
- * \author xythobuz
- */
-
-#include "global.h"
-#include "Game.h"
-#include "loader/Loader.h"
-#include "Log.h"
-#include "Render.h"
-#include "RunTime.h"
-#include "MenuFolder.h"
-#include "system/Font.h"
-#include "system/Window.h"
-
-MenuFolder::MenuFolder() {
-    mCursor = 0;
-    mMin = 0;
-    mapFolder = nullptr;
-    hiddenState = false;
-    dialogState = false;
-    visible = false;
-}
-
-MenuFolder::~MenuFolder() {
-    delete mapFolder;
-    mapFolder = nullptr;
-}
-
-int MenuFolder::initialize() {
-    return init(RunTime::getPakDir());
-}
-
-int MenuFolder::init(std::string s) {
-    return init(new Folder(s));
-}
-
-int MenuFolder::init(Folder* folder, bool filter) {
-    if (mapFolder != nullptr)
-        delete mapFolder;
-
-    mapFolder = folder;
-    mMin = mCursor = 0;
-
-    if (filter) {
-        mapFolder->executeRemoveFiles([](File & f) {
-            // Filter files based on file name
-            if ((f.getName().length() > 4)
-                && (f.getName().compare(f.getName().length() - 4, 4, ".phd") != 0)
-                && (f.getName().compare(f.getName().length() - 4, 4, ".psx") != 0)
-                && (f.getName().compare(f.getName().length() - 4, 4, ".tub") != 0)
-                && (f.getName().compare(f.getName().length() - 4, 4, ".tr2") != 0)
-                && (f.getName().compare(f.getName().length() - 4, 4, ".tr4") != 0)
-                && (f.getName().compare(f.getName().length() - 4, 4, ".trc") != 0)) {
-                return true; // delete file from list
-            }
-
-            // Check maps for validity
-            Loader::LoaderVersion version = Loader::checkFile(f.getPath());
-            if (version == Loader::TR_UNKNOWN) {
-                Log::get(LOG_ERROR) << "Error: pak file '" << f.getName().c_str()
-                                    << "' invalid" << Log::endl;
-                return true; // delete file from list
-            }
-
-            return false; // keep file on list
-        });
-    }
-
-    if ((mapFolder->fileCount() + mapFolder->folderCount()) > 0)
-        mCursor = 1; // Don't select ".." by default
-
-    return 0;
-}
-
-void MenuFolder::display() {
-    if (!visible)
-        return;
-
-    Font::drawTextCentered(0, 10, 1.2f, textColor, Window::getSize().x, VERSION);
-
-    // Draw half-transparent overlay
-    glm::vec4 color(0.0f, 0.0f, 0.0f, 0.75f);
-    Render::drawTexture(0.0f, 0.0f, Window::getSize().x, Window::getSize().y,
-                        color, TEXTURE_WHITE, TextureStorage::SYSTEM);
-
-    // Draw heading
-    Font::drawTextCentered(0, 10, 1.2f, textColor, Window::getSize().x, VERSION);
-
-    // Estimate displayable number of items
-    int items = (Window::getSize().y - 60) / 25;
-
-    // Print list of "..", folders, files
-    for (long i = mMin; (i < (mMin + items))
-         && (i < (mapFolder->folderCount() + mapFolder->fileCount() + 1)); i++) {
-        if (i == 0) {
-            Font::drawText(25, 50, 0.75f, (mCursor == i) ? selectedColor : textColor, "..");
-        } else {
-            Font::drawText(25, (unsigned int)(50 + (25 * (i - mMin))), 0.75f,
-                           (mCursor == i) ? selectedColor : textColor,
-                           ((i - 1) < mapFolder->folderCount()) ?
-                           (mapFolder->getFolder(i - 1).getName() + "/")
-                           : mapFolder->getFile(i - 1 - mapFolder->folderCount()).getName());
-        }
-    }
-
-    displayDialog();
-}
-
-void MenuFolder::loadOrOpen() {
-    if (mCursor == 0) {
-        if (init(mapFolder->getParent().getPath()) != 0) {
-            showDialog("Error reading parent folder!", "OK", "");
-        }
-    } else if ((mCursor - 1) < mapFolder->folderCount()) {
-        if (init(mapFolder->getFolder(mCursor - 1).getPath()) != 0) {
-            showDialog("Error reading subfolder!", "OK", "");
-        }
-    } else {
-        showDialog("Loading...", "OK");
-        renderFrame();
-        int error = Game::loadLevel(mapFolder->getFile((unsigned long)mCursor
-                                    - 1 - mapFolder->folderCount()).getPath().c_str());
-        ackDialog();
-        if (error == 0) {
-            visible = false;
-        } else {
-            std::ostringstream err;
-            err << "Error loading map: " << error << "!";
-            showDialog(err.str(), "OK", "");
-        }
-    }
-}
-
-void MenuFolder::handleKeyboard(KeyboardButton key, bool pressed) {
-    if (handleKeyboardDialog(key, pressed))
-        return;
-
-    if (!pressed)
-        return;
-
-    assert(mapFolder != nullptr);
-    int items = (Window::getSize().y - 60) / 25;
-
-    if (key == upKey) {
-        if (mCursor > 0)
-            mCursor--;
-        else
-            mCursor = (long)(mapFolder->folderCount() + mapFolder->fileCount());
-    } else if (key == downKey) {
-        if (mCursor < (long)(mapFolder->folderCount() + mapFolder->fileCount()))
-            mCursor++;
-        else
-            mCursor = 0;
-    } else if (key == enterKey) {
-        loadOrOpen();
-    } else if (key == dotKey) {
-        hiddenState = !hiddenState;
-        init(mapFolder->getPath());
-    }
-
-    if (mCursor > (mMin + items - 1)) {
-        mMin = mCursor - items + 1;
-    } else if (mCursor < mMin) {
-        mMin = mCursor;
-    }
-}
-
-void MenuFolder::handleMouseClick(unsigned int x, unsigned int y, KeyboardButton button,
-                                  bool released) {
-    if (handleMouseClickDialog(x, y, button, released))
-        return;
-
-    int items = (Window::getSize().y - 60) / 25;
-
-    if (released || (button != leftmouseKey))
-        return;
-
-    if ((y >= 50) && (y <= (unsigned int)(50 + (25 * items)))
-        && ((mMin + (y / 25)) <= (mapFolder->folderCount() + mapFolder->fileCount() + 2))) {
-        y -= 50;
-        if (mCursor == (mMin + (y / 25)))
-            loadOrOpen();
-        else
-            mCursor = mMin + (y / 25);
-    }
-}
-
-void MenuFolder::handleMouseScroll(int xrel, int yrel) {
-    if (handleMouseScrollDialog(xrel, yrel))
-        return;
-
-    assert((xrel != 0) || (yrel != 0));
-    assert(mapFolder != nullptr);
-    int items = (Window::getSize().y - 60) / 25;
-
-    if ((mapFolder->folderCount() + mapFolder->fileCount() + 1) > items) {
-        if (yrel < 0) {
-            if (mMin < (mapFolder->folderCount() + mapFolder->fileCount() + 1 - items))
-                mMin++;
-        } else if (yrel > 0) {
-            if (mMin > 0)
-                mMin--;
-        }
-
-        if (mCursor < mMin) {
-            mCursor = mMin;
-        } else if (mCursor > (mMin + items - 1)) {
-            mCursor = mMin + items - 1;
-        }
-    }
-}
-
diff --git a/src/Render.cpp b/src/Render.cpp
index 8ac493a9..90f3c945 100644
--- a/src/Render.cpp
+++ b/src/Render.cpp
@@ -12,6 +12,7 @@
 #include "global.h"
 #include "Camera.h"
 #include "Log.h"
+#include "Menu.h"
 #include "StaticMesh.h"
 #include "World.h"
 #include "system/Font.h"
@@ -280,6 +281,10 @@ void Render::displayUI() {
         if (ImGui::Button("New Splash##render")) {
             TextureManager::initializeSplash();
         }
+        ImGui::SameLine();
+        if (ImGui::Button("New Menu##render")) {
+            Menu::initialize();
+        }
     }
 }
 
diff --git a/src/Script.cpp b/src/Script.cpp
index bd050505..4da441be 100644
--- a/src/Script.cpp
+++ b/src/Script.cpp
@@ -40,11 +40,7 @@ Script::Script() : puzzles(4), pickups(2), keys(4) {
     numGameStrings = 0;
 }
 
-Script::~Script() {
-
-}
-
-int Script::load(const char* file) {
+int Script::load(std::string file) {
     BinaryFile f;
 
     if (f.open(file) != 0)
@@ -351,3 +347,19 @@ int Script::runScript(unsigned int level) {
     return 0;
 }
 
+std::string Script::getLanguage() {
+    if (language == S_English) {
+        return "English (UK)";
+    } else if (language == S_French) {
+        return "French";
+    } else if (language == S_German) {
+        return "German";
+    } else if (language == S_American) {
+        return "English (US)";
+    } else if (language == S_Japanese) {
+        return "Japanese";
+    } else {
+        return "Unknown";
+    }
+}
+
diff --git a/src/TextureManager.cpp b/src/TextureManager.cpp
index c46d67e0..dbfa8812 100644
--- a/src/TextureManager.cpp
+++ b/src/TextureManager.cpp
@@ -84,6 +84,10 @@ int TextureManager::initializeSplash() {
     Folder f(RunTime::getPakDir());
     std::vector<File> files;
     f.findRecursiveFilesEndingWith(files, ".pcx");
+    f.findRecursiveFilesEndingWith(files, ".bmp");
+    f.findRecursiveFilesEndingWith(files, ".png");
+    f.findRecursiveFilesEndingWith(files, ".tga");
+    f.findRecursiveFilesEndingWith(files, ".jpg");
     if (files.size() == 0) {
         if (loadImage(RunTime::getDataDir() + "/splash.tga", TextureStorage::SYSTEM, TEXTURE_SPLASH) < 0) {
             return -2;
diff --git a/src/UI.cpp b/src/UI.cpp
index 7e59f45e..29746bab 100644
--- a/src/UI.cpp
+++ b/src/UI.cpp
@@ -88,7 +88,7 @@ int UI::initialize() {
     int width, height;
     io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
     fontTex = TextureManager::loadBufferSlot(pixels, width, height, ColorMode::RGBA, 32,
-              TextureStorage::SYSTEM, -1, false);
+              TextureStorage::SYSTEM, -1, true);
     auto bm = TextureManager::getBufferManager(fontTex, TextureStorage::SYSTEM);
     io.Fonts->TexID = bm;
 
@@ -156,56 +156,27 @@ void UI::eventsFinished() {
 
     ImGui::NewFrame();
 
-    if (!(visible || Console::isVisible())) {
-        while (!clickEvents.empty()) {
-            auto i = clickEvents.front();
-            if (getMenu().isVisible()) {
-                getMenu().handleMouseClick(std::get<0>(i), std::get<1>(i),
-                                           std::get<2>(i), std::get<3>(i));
-            }
-            clickEvents.pop_front();
-        }
-
+    if (!(visible || Console::isVisible() || Menu::isVisible())) {
         while (!motionEvents.empty()) {
             auto i = motionEvents.front();
-            if (!getMenu().isVisible()) {
-                Game::handleMouseMotion(std::get<0>(i), std::get<1>(i),
-                                        std::get<2>(i), std::get<3>(i));
-            }
+            Game::handleMouseMotion(std::get<0>(i), std::get<1>(i),
+                                    std::get<2>(i), std::get<3>(i));
             motionEvents.pop_front();
         }
-
-        while (!scrollEvents.empty()) {
-            auto i = scrollEvents.front();
-            if (getMenu().isVisible()) {
-                getMenu().handleMouseScroll(std::get<0>(i), std::get<1>(i));
-            }
-            scrollEvents.pop_front();
-        }
     }
 
     while (!keyboardEvents.empty()) {
         auto i = keyboardEvents.front();
 
-        if (!(visible || Console::isVisible())) {
-            if (getMenu().isVisible()) {
-                getMenu().handleKeyboard(std::get<0>(i), std::get<1>(i));
-            } else {
-                for (int n = forwardAction; n < ActionEventCount; n++) {
-                    if (RunTime::getKeyBinding((ActionEvents)n) == std::get<0>(i))
-                        Game::handleAction((ActionEvents)n, !std::get<1>(i));
-                }
+        if (!(visible || Console::isVisible() || Menu::isVisible())) {
+            for (int n = forwardAction; n < ActionEventCount; n++) {
+                if (RunTime::getKeyBinding((ActionEvents)n) == std::get<0>(i))
+                    Game::handleAction((ActionEvents)n, !std::get<1>(i));
             }
         }
 
         if (std::get<1>(i)) {
-            if (!(visible || Console::isVisible())) {
-                if (RunTime::getKeyBinding(menuAction) == std::get<0>(i)) {
-                    getMenu().setVisible(!getMenu().isVisible());
-                }
-            }
-
-            if ((!io.WantCaptureKeyboard) || (!(visible || Console::isVisible()))) {
+            if ((!io.WantCaptureKeyboard) || (!(visible || Console::isVisible() || Menu::isVisible()))) {
                 if (!metaKeyIsActive) {
                     if (RunTime::getKeyBinding(debugAction) == std::get<0>(i)) {
                         visible = !visible;
@@ -214,6 +185,10 @@ void UI::eventsFinished() {
                     if (RunTime::getKeyBinding(consoleAction) == std::get<0>(i)) {
                         Console::setVisible(!Console::isVisible());
                     }
+
+                    if (RunTime::getKeyBinding(menuAction) == std::get<0>(i)) {
+                        Menu::setVisible(!Menu::isVisible());
+                    }
                 }
             }
         }
@@ -226,18 +201,16 @@ void UI::eventsFinished() {
     motionEvents.clear();
     scrollEvents.clear();
 
-    if ((visible || Console::isVisible()) && (
-            ((!io.WantCaptureKeyboard) && io.KeysDown[escapeKey])
-            || ((!io.WantCaptureMouse) && clicked)
-        )) {
+    // Allow clicking into the game to hide debug UI
+    if ((visible || Console::isVisible()) && ((!io.WantCaptureMouse) && clicked)) {
         visible = false;
         Console::setVisible(false);
     }
 
-    if (Window::getTextInput() != (visible || Console::isVisible()))
+    if (Window::getTextInput() != (visible || Console::isVisible() || Menu::isVisible()))
         Window::setTextInput(visible || Console::isVisible());
 
-    bool input = !(visible || Console::isVisible() || getMenu().isVisible());
+    bool input = !(visible || Console::isVisible() || Menu::isVisible());
     if (Window::getMousegrab() != input)
         Window::setMousegrab(input);
 
@@ -245,7 +218,7 @@ void UI::eventsFinished() {
 }
 
 void UI::display() {
-    if (RunTime::getShowFPS() && (!getMenu().isVisible())) {
+    if (RunTime::getShowFPS() && (!Menu::isVisible())) {
         if (ImGui::Begin("Debug Overlay", nullptr, ImVec2(0, 0), -1.0f,
                          ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoResize
                          | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoSavedSettings
@@ -266,6 +239,7 @@ void UI::display() {
         Camera::displayUI();
 
     Console::display();
+    Menu::display();
 
     if (!visible) {
         ImGui::Render();
@@ -441,7 +415,7 @@ void UI::handleControllerButton(KeyboardButton button, bool released) {
     if (visible || Console::isVisible())
         return;
 
-    if (getMenu().isVisible()) {
+    if (Menu::isVisible()) {
         if (button == aButton) {
             handleKeyboard(enterKey, !released);
         } else if (button == padUp) {
@@ -454,7 +428,7 @@ void UI::handleControllerButton(KeyboardButton button, bool released) {
             handleKeyboard(rightKey, !released);
         } else if (button == startButton) {
             if (!released)
-                getMenu().setVisible(false);
+                Menu::setVisible(false);
         }
     } else {
         if (button == aButton) {
@@ -477,7 +451,7 @@ void UI::handleControllerButton(KeyboardButton button, bool released) {
             Game::handleAction(walkAction, released);
         } else if (button == startButton) {
             if (!released)
-                getMenu().setVisible(true);
+                Menu::setVisible(true);
         }
     }
 }
diff --git a/src/deps/imgui/imconfig.h b/src/deps/imgui/imconfig.h
index 7d639e79..d4c9bfe0 100644
--- a/src/deps/imgui/imconfig.h
+++ b/src/deps/imgui/imconfig.h
@@ -24,21 +24,21 @@
 //#define IMGUI_DISABLE_WIN32_DEFAULT_IME_FUNCS
 
 //---- Include imgui_user.inl at the end of imgui.cpp so you can include code that extends ImGui using its private data/functions.
-//#define IMGUI_INCLUDE_IMGUI_USER_INL
+#define IMGUI_INCLUDE_IMGUI_USER_INL
 
 //---- Include imgui_user.h at the end of imgui.h
-//#define IMGUI_INCLUDE_IMGUI_USER_H
+#define IMGUI_INCLUDE_IMGUI_USER_H
 
 //---- Define implicit cast operators to convert back<>forth from your math types and ImVec2/ImVec4.
-/*
-#define IM_VEC2_CLASS_EXTRA                                                 \
-        ImVec2(const MyVec2& f) { x = f.x; y = f.y; }                       \
-        operator MyVec2() const { return MyVec2(x,y); }
-
-#define IM_VEC4_CLASS_EXTRA                                                 \
-        ImVec4(const MyVec4& f) { x = f.x; y = f.y; z = f.z; w = f.w; }     \
-        operator MyVec4() const { return MyVec4(x,y,z,w); }
-*/
+#include <glm/vec2.hpp>
+#define IM_VEC2_CLASS_EXTRA                                                \
+        ImVec2(const glm::vec2& f) { x = f.x; y = f.y; }                   \
+        operator glm::vec2() const { return glm::vec2(x, y); }
+
+#include <glm/vec4.hpp>
+#define IM_VEC4_CLASS_EXTRA                                                \
+        ImVec4(const glm::vec4& f) { x = f.x; y = f.y; z = f.z; w = f.w; } \
+        operator glm::vec4() const { return glm::vec4(x,y,z,w); }
 
 //---- Freely implement extra functions within the ImGui:: namespace.
 //---- Declare helpers or widgets implemented in imgui_user.inl or elsewhere, so end-user doesn't need to include multiple files.
diff --git a/src/deps/imgui/imgui_user.h b/src/deps/imgui/imgui_user.h
new file mode 100755
index 00000000..23b5d830
--- /dev/null
+++ b/src/deps/imgui/imgui_user.h
@@ -0,0 +1,2 @@
+#include "imguifilesystem/imguifilesystem.h"
+
diff --git a/src/deps/imgui/imgui_user.inl b/src/deps/imgui/imgui_user.inl
new file mode 100755
index 00000000..54a8b3de
--- /dev/null
+++ b/src/deps/imgui/imgui_user.inl
@@ -0,0 +1,2 @@
+#include "imguifilesystem/imguifilesystem.cpp"
+
diff --git a/src/deps/imguifilesystem/README.txt b/src/deps/imguifilesystem/README.txt
new file mode 100644
index 00000000..4f78cd8b
--- /dev/null
+++ b/src/deps/imguifilesystem/README.txt
@@ -0,0 +1,13 @@
+imguifilesystem dialogs for imgui v.1.17 wip (https://github.com/ocornut/imgui).
+See also: https://github.com/ocornut/imgui/issues/88
+
+It's composed by three files:
+
+-    imguifilesystem.h (usage instructions are here)
+-    imguifilesystem.cpp
+-    dirent_portable.h
+
+It needs testing and feedback (expecially for Windows/VisualC++ and MacOS).
+
+It does not use any C++ string class: so it should be straightforward to merge its code
+into imgui.h/imgui.cpp if we want to (and if the code is robust enough). 
\ No newline at end of file
diff --git a/src/deps/imguifilesystem/dirent_portable.h b/src/deps/imguifilesystem/dirent_portable.h
new file mode 100644
index 00000000..be2a0ae6
--- /dev/null
+++ b/src/deps/imguifilesystem/dirent_portable.h
@@ -0,0 +1,1040 @@
+/*
+ * This file was originally: "dirent for Visual C++" from: http://softagalleria.net/dirent.php (version 1.20.1)
+ * However I've modified it to <dirent_portable.h> by adding:
+ *
+ * a fallback to <dirent.h> if _WIN32 is not defined
+ * two missing methods: scandir(...) and alphasort(...)
+ * and some other minor modifications (see below)
+ *
+ *
+ * Original license from http://softagalleria.net/dirent.php
+ *
+ *========================================================================
+ *
+ * dirent.h - dirent API for Microsoft Visual Studio
+ *
+ * Copyright (C) 2006-2012 Toni Ronkko
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * ``Software''), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL TONI RONKKO BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * $Id: dirent.h,v 1.20 2014/03/19 17:52:23 tronkko Exp $
+ *
+ * =========================================================================
+ * Added:
+ * -> some undefs to prevent possible compiler warnings
+ * -> the scandir(...) and alphasort(...) methods
+ * -> the optional DIRENT_USES_UTF8_CHARS definition (needed for browsing with long UTF8 paths, instead of short ASCII paths).
+ *    WARNING: in my tests the usage of the DIRENT_USES_UTF8_CHARS is not fully functional (patches are welcome)
+ * All these additions have been made to made <dirent_portable.h> usage for Windows consistent
+ * with what I get using <direct.h> under my Ubuntu Linux OS.
+ * =========================================================================
+ *
+ * The code of the scandir(...) method come from the musl library (http://www.musl-libc.org/)
+ * (MIT licensed, Copyright © 2005-2014 Rich Felker, et al.).
+ *
+ * The code of the alphasort(...) method and of all the other minor modifications is in the public domain.
+ *
+ */
+
+#if (!defined(_WIN32) && !defined(_WIN64))
+#	include <dirent.h>
+#else // #if (!defined(_WIN32) && !defined(_WIN64))
+
+#ifndef DIRENT_H
+#define DIRENT_H
+
+/*
+ * Define architecture flags so we don't need to include windows.h.
+ * Avoiding windows.h makes it simpler to use windows sockets in conjunction
+ * with dirent.h.
+ */
+#if !defined(_68K_) && !defined(_MPPC_) && !defined(_X86_) && !defined(_IA64_) && !defined(_AMD64_) && defined(_M_IX86)
+#   define _X86_
+#endif
+#if !defined(_68K_) && !defined(_MPPC_) && !defined(_X86_) && !defined(_IA64_) && !defined(_AMD64_) && defined(_M_AMD64)
+#define _AMD64_
+#endif
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <windef.h>
+#include <winbase.h>
+#include <wchar.h>
+#include <string.h>
+#include <stdlib.h>
+#include <malloc.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+//#define DIRENT_USES_UTF8_CHARS // Test only
+
+/* Indicates that d_type field is available in dirent structure */
+#define _DIRENT_HAVE_D_TYPE
+
+/* Indicates that d_namlen field is available in dirent structure */
+#define _DIRENT_HAVE_D_NAMLEN
+
+/* Entries missing from MSVC 6.0 */
+#if !defined(FILE_ATTRIBUTE_DEVICE)
+#   define FILE_ATTRIBUTE_DEVICE 0x40
+#endif
+
+/* File type and permission flags for stat() */
+#if !defined(S_IFMT)
+#   define S_IFMT   _S_IFMT                     /* File type mask */
+#endif
+#if !defined(S_IFDIR)
+#   define S_IFDIR  _S_IFDIR                    /* Directory */
+#endif
+#if !defined(S_IFCHR)
+#   define S_IFCHR  _S_IFCHR                    /* Character device */
+#endif
+#if !defined(S_IFFIFO)
+#   define S_IFFIFO _S_IFFIFO                   /* Pipe */
+#endif
+#if !defined(S_IFREG)
+#   define S_IFREG  _S_IFREG                    /* Regular file */
+#endif
+#if !defined(S_IREAD)
+#   define S_IREAD  _S_IREAD                    /* Read permission */
+#endif
+#if !defined(S_IWRITE)
+#   define S_IWRITE _S_IWRITE                   /* Write permission */
+#endif
+#if !defined(S_IEXEC)
+#   define S_IEXEC  _S_IEXEC                    /* Execute permission */
+#endif
+#if !defined(S_IFIFO)
+#   define S_IFIFO _S_IFIFO                     /* Pipe */
+#endif
+#if !defined(S_IFBLK)
+#   define S_IFBLK   0                          /* Block device */
+#endif
+#if !defined(S_IFLNK)
+#   define S_IFLNK   0                          /* Link */
+#endif
+#if !defined(S_IFSOCK)
+#   define S_IFSOCK  0                          /* Socket */
+#endif
+
+#if defined(_MSC_VER)
+#   define S_IRUSR  S_IREAD                     /* Read user */
+#   define S_IWUSR  S_IWRITE                    /* Write user */
+#   define S_IXUSR  0                           /* Execute user */
+#   define S_IRGRP  0                           /* Read group */
+#   define S_IWGRP  0                           /* Write group */
+#   define S_IXGRP  0                           /* Execute group */
+#   define S_IROTH  0                           /* Read others */
+#   define S_IWOTH  0                           /* Write others */
+#   define S_IXOTH  0                           /* Execute others */
+#endif
+
+/* Maximum length of file name */
+#ifdef DIRENT_USES_UTF8_CHARS
+// utf8 strings can have up to 4 bytes per char
+#   undef PATH_MAX
+#   define PATH_MAX (MAX_PATH*4)
+#   undef FILENAME_MAX
+#   define FILENAME_MAX MAX_PATH
+#   undef NAME_MAX
+#   define NAME_MAX FILENAME_MAX
+#else //DIRENT_USES_UTF8_CHARS
+#   if !defined(PATH_MAX)
+#       define PATH_MAX MAX_PATH
+#   endif
+#   if !defined(FILENAME_MAX)
+#       define FILENAME_MAX MAX_PATH
+#   endif
+#   if !defined(NAME_MAX)
+#       define NAME_MAX FILENAME_MAX
+#   endif
+#endif //DIRENT_USES_UTF8_CHARS
+
+/* File type flags for d_type */
+#define DT_UNKNOWN  0
+#define DT_REG      S_IFREG
+#define DT_DIR      S_IFDIR
+#define DT_FIFO     S_IFIFO
+#define DT_SOCK     S_IFSOCK
+#define DT_CHR      S_IFCHR
+#define DT_BLK      S_IFBLK
+#define DT_LNK      S_IFLNK
+
+/* Macros for converting between st_mode and d_type */
+#define IFTODT(mode) ((mode) & S_IFMT)
+#define DTTOIF(type) (type)
+
+/*
+ * File type macros.  Note that block devices, sockets and links cannot be
+ * distinguished on Windows and the macros S_ISBLK, S_ISSOCK and S_ISLNK are
+ * only defined for compatibility.  These macros should always return false
+ * on Windows.
+ */
+
+// Added some undefs to prevent possible compiler warnings
+#undef S_ISFIFO
+#undef S_ISDIR
+#undef S_ISREG
+#undef S_ISLNK
+#undef S_ISSOCK
+#undef S_ISSOCK
+#undef S_ISCHR
+#undef S_ISBLK
+
+#define	S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
+#define	S_ISDIR(mode)  (((mode) & S_IFMT) == S_IFDIR)
+#define	S_ISREG(mode)  (((mode) & S_IFMT) == S_IFREG)
+#define	S_ISLNK(mode)  (((mode) & S_IFMT) == S_IFLNK)
+#define	S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
+#define	S_ISCHR(mode)  (((mode) & S_IFMT) == S_IFCHR)
+#define	S_ISBLK(mode)  (((mode) & S_IFMT) == S_IFBLK)
+
+/* Return the exact length of d_namlen without zero terminator */
+#define _D_EXACT_NAMLEN(p) ((p)->d_namlen)
+
+/* Return number of bytes needed to store d_namlen */
+#define _D_ALLOC_NAMLEN(p) (PATH_MAX)
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Wide-character version */
+struct _wdirent {
+    long d_ino;                                 /* Always zero */
+    unsigned short d_reclen;                    /* Structure size */
+    size_t d_namlen;                            /* Length of name without \0 */
+    int d_type;                                 /* File type */
+    wchar_t d_name[PATH_MAX];                   /* File name */
+};
+typedef struct _wdirent _wdirent;
+
+struct _WDIR {
+    struct _wdirent ent;                        /* Current directory entry */
+    WIN32_FIND_DATAW data;                      /* Private file data */
+    int cached;                                 /* True if data is valid */
+    HANDLE handle;                              /* Win32 search handle */
+    wchar_t *patt;                              /* Initial directory name */
+};
+typedef struct _WDIR _WDIR;
+
+static _WDIR *_wopendir (const wchar_t *dirname);
+static struct _wdirent *_wreaddir (_WDIR *dirp);
+static int _wclosedir (_WDIR *dirp);
+static void _wrewinddir (_WDIR* dirp);
+
+
+/* For compatibility with Symbian */
+#define wdirent _wdirent
+#define WDIR _WDIR
+#define wopendir _wopendir
+#define wreaddir _wreaddir
+#define wclosedir _wclosedir
+#define wrewinddir _wrewinddir
+
+
+/* Multi-byte character versions */
+struct dirent {
+    long d_ino;                                 /* Always zero */
+    unsigned short d_reclen;                    /* Structure size */
+    size_t d_namlen;                            /* Length of name without \0 */
+    int d_type;                                 /* File type */
+    char d_name[PATH_MAX];                      /* File name */
+};
+typedef struct dirent dirent;
+
+struct DIR {
+    struct dirent ent;
+    struct _WDIR *wdirp;
+};
+typedef struct DIR DIR;
+
+static DIR *opendir (const char *dirname);
+static struct dirent *readdir (DIR *dirp);
+static int closedir (DIR *dirp);
+static void rewinddir (DIR* dirp);
+
+
+/* Internal utility functions */
+static WIN32_FIND_DATAW *dirent_first (_WDIR *dirp);
+static WIN32_FIND_DATAW *dirent_next (_WDIR *dirp);
+
+static int dirent_mbstowcs_s(
+    size_t *pReturnValue,
+    wchar_t *wcstr,
+    size_t sizeInWords,
+    const char *mbstr,
+    size_t count);
+
+static int dirent_wcstombs_s(
+    size_t *pReturnValue,
+    char *mbstr,
+    size_t sizeInBytes,
+    const wchar_t *wcstr,
+    size_t count);
+
+static void dirent_set_errno (int error);
+
+/*
+ * Open directory stream DIRNAME for read and return a pointer to the
+ * internal working area that is used to retrieve individual directory
+ * entries.
+ */
+static _WDIR*
+_wopendir(
+    const wchar_t *dirname)
+{
+    _WDIR *dirp = NULL;
+    int error;
+
+    /* Must have directory name */
+    if (dirname == NULL  ||  dirname[0] == '\0') {
+        dirent_set_errno (ENOENT);
+        return NULL;
+    }
+
+    /* Allocate new _WDIR structure */
+    dirp = (_WDIR*) malloc (sizeof (struct _WDIR));
+    if (dirp != NULL) {
+        DWORD n;
+
+        /* Reset _WDIR structure */
+        dirp->handle = INVALID_HANDLE_VALUE;
+        dirp->patt = NULL;
+        dirp->cached = 0;
+
+        /* Compute the length of full path plus zero terminator */
+        n = GetFullPathNameW (dirname, 0, NULL, NULL);
+
+        /* Allocate room for absolute directory name and search pattern */
+        dirp->patt = (wchar_t*) malloc (sizeof (wchar_t) * n + 16);
+        if (dirp->patt) {
+
+            /*
+             * Convert relative directory name to an absolute one.  This
+             * allows rewinddir() to function correctly even when current
+             * working directory is changed between opendir() and rewinddir().
+             */
+            n = GetFullPathNameW (dirname, n, dirp->patt, NULL);
+            if (n > 0) {
+                wchar_t *p;
+
+                /* Append search pattern \* to the directory name */
+                p = dirp->patt + n;
+                if (dirp->patt < p) {
+                    switch (p[-1]) {
+                    case '\\':
+                    case '/':
+                    case ':':
+                        /* Directory ends in path separator, e.g. c:\temp\ */
+                        /*NOP*/;
+                        break;
+
+                    default:
+                        /* Directory name doesn't end in path separator */
+                        *p++ = '\\';
+                    }
+                }
+                *p++ = '*';
+                *p = '\0';
+
+                /* Open directory stream and retrieve the first entry */
+                if (dirent_first (dirp)) {
+                    /* Directory stream opened successfully */
+                    error = 0;
+                } else {
+                    /* Cannot retrieve first entry */
+                    error = 1;
+                    dirent_set_errno (ENOENT);
+                }
+
+            } else {
+                /* Cannot retrieve full path name */
+                dirent_set_errno (ENOENT);
+                error = 1;
+            }
+
+        } else {
+            /* Cannot allocate memory for search pattern */
+            error = 1;
+        }
+
+    } else {
+        /* Cannot allocate _WDIR structure */
+        error = 1;
+    }
+
+    /* Clean up in case of error */
+    if (error  &&  dirp) {
+        _wclosedir (dirp);
+        dirp = NULL;
+    }
+
+    return dirp;
+}
+
+/*
+ * Read next directory entry.  The directory entry is returned in dirent
+ * structure in the d_name field.  Individual directory entries returned by
+ * this function include regular files, sub-directories, pseudo-directories
+ * "." and ".." as well as volume labels, hidden files and system files.
+ */
+static struct _wdirent*
+_wreaddir(
+    _WDIR *dirp)
+{
+    WIN32_FIND_DATAW *datap;
+    struct _wdirent *entp;
+
+    /* Read next directory entry */
+    datap = dirent_next (dirp);
+    if (datap) {
+        size_t n;
+        DWORD attr;
+
+        /* Pointer to directory entry to return */
+        entp = &dirp->ent;
+
+        /*
+         * Copy file name as wide-character string.  If the file name is too
+         * long to fit in to the destination buffer, then truncate file name
+         * to PATH_MAX characters and zero-terminate the buffer.
+         */
+        n = 0;
+        while (n + 1 < PATH_MAX  &&  datap->cFileName[n] != 0) {
+            entp->d_name[n] = datap->cFileName[n];
+            n++;
+        }
+        dirp->ent.d_name[n] = 0;
+
+        /* Length of file name excluding zero terminator */
+        entp->d_namlen = n;
+
+        /* File type */
+        attr = datap->dwFileAttributes;
+        if ((attr & FILE_ATTRIBUTE_DEVICE) != 0) {
+            entp->d_type = DT_CHR;
+        } else if ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0) {
+            entp->d_type = DT_DIR;
+        } else {
+            entp->d_type = DT_REG;
+        }
+
+        /* Reset dummy fields */
+        entp->d_ino = 0;
+        entp->d_reclen = sizeof (struct _wdirent);
+
+    } else {
+
+        /* Last directory entry read */
+        entp = NULL;
+
+    }
+
+    return entp;
+}
+
+/*
+ * Close directory stream opened by opendir() function.  This invalidates the
+ * DIR structure as well as any directory entry read previously by
+ * _wreaddir().
+ */
+static int
+_wclosedir(
+    _WDIR *dirp)
+{
+    int ok;
+    if (dirp) {
+
+        /* Release search handle */
+        if (dirp->handle != INVALID_HANDLE_VALUE) {
+            FindClose (dirp->handle);
+            dirp->handle = INVALID_HANDLE_VALUE;
+        }
+
+        /* Release search pattern */
+        if (dirp->patt) {
+            free (dirp->patt);
+            dirp->patt = NULL;
+        }
+
+        /* Release directory structure */
+        free (dirp);
+        ok = /*success*/0;
+
+    } else {
+        /* Invalid directory stream */
+        dirent_set_errno (EBADF);
+        ok = /*failure*/-1;
+    }
+    return ok;
+}
+
+/*
+ * Rewind directory stream such that _wreaddir() returns the very first
+ * file name again.
+ */
+static void
+_wrewinddir(
+    _WDIR* dirp)
+{
+    if (dirp) {
+        /* Release existing search handle */
+        if (dirp->handle != INVALID_HANDLE_VALUE) {
+            FindClose (dirp->handle);
+        }
+
+        /* Open new search handle */
+        dirent_first (dirp);
+    }
+}
+
+/* Get first directory entry (internal) */
+static WIN32_FIND_DATAW*
+dirent_first(
+    _WDIR *dirp)
+{
+    WIN32_FIND_DATAW *datap;
+
+    /* Open directory and retrieve the first entry */
+    dirp->handle = FindFirstFileW (dirp->patt, &dirp->data);
+    if (dirp->handle != INVALID_HANDLE_VALUE) {
+
+        /* a directory entry is now waiting in memory */
+        datap = &dirp->data;
+        dirp->cached = 1;
+
+    } else {
+
+        /* Failed to re-open directory: no directory entry in memory */
+        dirp->cached = 0;
+        datap = NULL;
+
+    }
+    return datap;
+}
+
+/* Get next directory entry (internal) */
+static WIN32_FIND_DATAW*
+dirent_next(
+    _WDIR *dirp)
+{
+    WIN32_FIND_DATAW *p;
+
+    /* Get next directory entry */
+    if (dirp->cached != 0) {
+
+        /* A valid directory entry already in memory */
+        p = &dirp->data;
+        dirp->cached = 0;
+
+    } else if (dirp->handle != INVALID_HANDLE_VALUE) {
+
+        /* Get the next directory entry from stream */
+        if (FindNextFileW (dirp->handle, &dirp->data) != FALSE) {
+            /* Got a file */
+            p = &dirp->data;
+        } else {
+            /* The very last entry has been processed or an error occured */
+            FindClose (dirp->handle);
+            dirp->handle = INVALID_HANDLE_VALUE;
+            p = NULL;
+        }
+
+    } else {
+
+        /* End of directory stream reached */
+        p = NULL;
+
+    }
+
+    return p;
+}
+
+/*
+ * Open directory stream using plain old C-string.
+ */
+static DIR*
+opendir(
+    const char *dirname)
+{
+    struct DIR *dirp;
+    int error;
+
+    /* Must have directory name */
+    if (dirname == NULL  ||  dirname[0] == '\0') {
+        dirent_set_errno (ENOENT);
+        return NULL;
+    }
+
+    /* Allocate memory for DIR structure */
+    dirp = (DIR*) malloc (sizeof (struct DIR));
+    if (dirp) {
+        wchar_t wname[PATH_MAX];
+        size_t n;
+
+        /* Convert directory name to wide-character string */
+        error = dirent_mbstowcs_s (&n, wname, PATH_MAX, dirname, PATH_MAX);
+        if (!error) {
+
+            /* Open directory stream using wide-character name */
+            dirp->wdirp = _wopendir (wname);
+            if (dirp->wdirp) {
+                /* Directory stream opened */
+                error = 0;
+            } else {
+                /* Failed to open directory stream */
+                error = 1;
+            }
+
+        } else {
+            /*
+             * Cannot convert file name to wide-character string.  This
+             * occurs if the string contains invalid multi-byte sequences or
+             * the output buffer is too small to contain the resulting
+             * string.
+             */
+            error = 1;
+        }
+
+    } else {
+        /* Cannot allocate DIR structure */
+        error = 1;
+    }
+
+    /* Clean up in case of error */
+    if (error  &&  dirp) {
+        free (dirp);
+        dirp = NULL;
+    }
+
+    return dirp;
+}
+
+/*
+ * Read next directory entry.
+ *
+ * When working with text consoles, please note that file names returned by
+ * readdir() are represented in the default ANSI code page while any output to
+ * console is typically formatted on another code page.  Thus, non-ASCII
+ * characters in file names will not usually display correctly on console.  The
+ * problem can be fixed in two ways: (1) change the character set of console
+ * to 1252 using chcp utility and use Lucida Console font, or (2) use
+ * _cprintf function when writing to console.  The _cprinf() will re-encode
+ * ANSI strings to the console code page so many non-ASCII characters will
+ * display correcly.
+ */
+static struct dirent*
+readdir(
+    DIR *dirp)
+{
+    WIN32_FIND_DATAW *datap;
+    struct dirent *entp;
+
+    /* Read next directory entry */
+    datap = dirent_next (dirp->wdirp);
+    if (datap) {
+        size_t n;
+        int error;
+
+        /* Attempt to convert file name to multi-byte string */
+        error = dirent_wcstombs_s(
+            &n, dirp->ent.d_name, PATH_MAX, datap->cFileName, PATH_MAX);
+
+        /*
+         * If the file name cannot be represented by a multi-byte string,
+         * then attempt to use old 8+3 file name.  This allows traditional
+         * Unix-code to access some file names despite of unicode
+         * characters, although file names may seem unfamiliar to the user.
+         *
+         * Be ware that the code below cannot come up with a short file
+         * name unless the file system provides one.  At least
+         * VirtualBox shared folders fail to do this.
+         */
+        if (error  &&  datap->cAlternateFileName[0] != '\0') {
+            error = dirent_wcstombs_s(
+                &n, dirp->ent.d_name, PATH_MAX,
+                datap->cAlternateFileName, PATH_MAX);
+        }
+
+        if (!error) {
+            DWORD attr;
+
+            /* Initialize directory entry for return */
+            entp = &dirp->ent;
+
+            /* Length of file name excluding zero terminator */
+            entp->d_namlen = n - 1;
+
+            /* File attributes */
+            attr = datap->dwFileAttributes;
+            if ((attr & FILE_ATTRIBUTE_DEVICE) != 0) {
+                entp->d_type = DT_CHR;
+            } else if ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0) {
+                entp->d_type = DT_DIR;
+            } else {
+                entp->d_type = DT_REG;
+            }
+
+            /* Reset dummy fields */
+            entp->d_ino = 0;
+            entp->d_reclen = sizeof (struct dirent);
+
+        } else {
+            /*
+             * Cannot convert file name to multi-byte string so construct
+             * an errornous directory entry and return that.  Note that
+             * we cannot return NULL as that would stop the processing
+             * of directory entries completely.
+             */
+            entp = &dirp->ent;
+            entp->d_name[0] = '?';
+            entp->d_name[1] = '\0';
+            entp->d_namlen = 1;
+            entp->d_type = DT_UNKNOWN;
+            entp->d_ino = 0;
+            entp->d_reclen = 0;
+        }
+
+    } else {
+        /* No more directory entries */
+        entp = NULL;
+    }
+
+    return entp;
+}
+
+/*
+ * Close directory stream.
+ */
+static int
+closedir(
+    DIR *dirp)
+{
+    int ok;
+    if (dirp) {
+
+        /* Close wide-character directory stream */
+        ok = _wclosedir (dirp->wdirp);
+        dirp->wdirp = NULL;
+
+        /* Release multi-byte character version */
+        free (dirp);
+
+    } else {
+
+        /* Invalid directory stream */
+        dirent_set_errno (EBADF);
+        ok = /*failure*/-1;
+
+    }
+    return ok;
+}
+
+/*
+ * Rewind directory stream to beginning.
+ */
+static void
+rewinddir(
+    DIR* dirp)
+{
+    /* Rewind wide-character string directory stream */
+    _wrewinddir (dirp->wdirp);
+}
+
+/* Convert multi-byte string to wide character string */
+static int
+dirent_mbstowcs_s(
+    size_t *pReturnValue,
+    wchar_t *wcstr,
+    size_t sizeInWords,
+    const char *mbstr,
+    size_t count)
+{
+    int error;
+#ifdef DIRENT_USES_UTF8_CHARS
+    // we don't use "count" at all: we assume mstr is zero terminated:
+    size_t n = (size_t) MultiByteToWideChar (CP_UTF8, 0, mbstr, -1, wcstr, 0);//sizeInWords);
+    if (n==0) {
+        error = 1;
+        if (sizeInWords>0) wcstr[0]=L'\0';
+        if (pReturnValue) *pReturnValue = 0;
+    }
+    else if (n<=sizeInWords) {
+        error = MultiByteToWideChar (CP_UTF8, 0, mbstr, -1, wcstr, n) == 0 ? 1 : 0;
+        if (pReturnValue) *pReturnValue = n;
+    }
+    else {
+        // Buffer too low:
+        if (sizeInWords>0)  {
+            if (sizeInWords>1) MultiByteToWideChar (CP_UTF8, 0, mbstr, -1, wcstr, sizeInWords-1);
+            wcstr[sizeInWords-1] = L'\0';
+        }
+        if (pReturnValue) *pReturnValue = sizeInWords;
+        error = 1;
+    }
+
+    /*
+    if (!wcstr  ||  n < count) {
+        // Zero-terminate output buffer
+        if (wcstr  &&  sizeInWords) {
+            if (n >= sizeInWords) {
+                n = sizeInWords - 1;
+            }
+            wcstr[n] = 0;
+        }
+
+        // Length of resuting multi-byte string WITH zero terminator
+        if (pReturnValue) {
+            *pReturnValue = n + 1;
+        }
+
+        // Success
+        error = 0;
+
+    } else {
+
+        // Could not convert string
+        error = 1;
+
+    }
+    */
+#else //DIRENT_USES_UTF8_CHARS
+#if defined(_MSC_VER)  &&  _MSC_VER >= 1400
+
+    /* Microsoft Visual Studio 2005 or later */
+    error = mbstowcs_s (pReturnValue, wcstr, sizeInWords, mbstr, count);
+
+#else
+
+    /* Older Visual Studio or non-Microsoft compiler */
+    size_t n;
+
+    /* Convert to wide-character string (or count characters) */
+     n = mbstowcs (wcstr, mbstr, sizeInWords);
+    if (!wcstr  ||  n < count) {
+
+        /* Zero-terminate output buffer */
+        if (wcstr  &&  sizeInWords) {
+            if (n >= sizeInWords) {
+                n = sizeInWords - 1;
+            }
+            wcstr[n] = 0;
+        }
+
+        /* Length of resuting multi-byte string WITH zero terminator */
+        if (pReturnValue) {
+            *pReturnValue = n + 1;
+        }
+
+        /* Success */
+        error = 0;
+
+    } else {
+
+        /* Could not convert string */
+        error = 1;
+
+    }
+
+#endif
+#endif //DIRENT_USES_UTF8_CHARS
+
+    return error;
+}
+
+/* Convert wide-character string to multi-byte string */
+static int
+dirent_wcstombs_s(
+    size_t *pReturnValue,
+    char *mbstr,
+    size_t sizeInBytes, /* max size of mbstr */
+    const wchar_t *wcstr,
+    size_t count)
+{
+    int error;
+
+#ifdef DIRENT_USES_UTF8_CHARS
+    // we don't use "count" at all: we assume wcstr is zero terminated:
+    size_t n = (size_t) WideCharToMultiByte (CP_UTF8, 0, wcstr, -1, mbstr, 0,NULL,NULL);//sizeInBytes, NULL, NULL);
+    if (n==0) {
+        error = 1;
+        if (sizeInBytes>0) mbstr[0]='\0';
+        if (pReturnValue) *pReturnValue = 0;
+    }
+    else if (n<=sizeInBytes) {
+        error = WideCharToMultiByte (CP_UTF8, 0, wcstr, -1, mbstr, n, NULL, NULL) == 0 ? 1 : 0;
+        if (pReturnValue) *pReturnValue = n;
+    }
+    else {
+        // Buffer too low:
+        if (sizeInBytes>0)  {
+            if (sizeInBytes>1) WideCharToMultiByte (CP_UTF8, 0, wcstr, -1, mbstr, sizeInBytes-1, NULL, NULL);
+            mbstr[sizeInBytes-1] = '\0';
+        }
+        if (pReturnValue) *pReturnValue = sizeInBytes;
+        error = 1;
+    }
+    /*
+    if (!mbstr  ||  n < count) {
+
+        // Zero-terminate output buffer
+        if (mbstr  &&  sizeInBytes) {
+            if (n >= sizeInBytes) {
+                n = sizeInBytes - 1;
+            }
+            mbstr[n] = '\0';
+        }
+
+        // Lenght of resulting multi-bytes string WITH zero-terminator
+        if (pReturnValue) {
+            *pReturnValue = n + 1;
+        }
+
+
+        // Success
+        error = 0;
+
+    } else {
+
+        // Cannot convert string
+        error = 1;
+
+    }
+    */
+#else //DIRENT_USES_UTF8_CHARS
+#if defined(_MSC_VER)  &&  _MSC_VER >= 1400
+
+    /* Microsoft Visual Studio 2005 or later */
+    error = wcstombs_s (pReturnValue, mbstr, sizeInBytes, wcstr, count);
+
+#else
+
+    /* Older Visual Studio or non-Microsoft compiler */
+    size_t n;
+
+    /* Convert to multi-byte string (or count the number of bytes needed) */
+    n = wcstombs (mbstr, wcstr, sizeInBytes);
+    if (!mbstr  ||  n < count) {
+
+        /* Zero-terminate output buffer */
+        if (mbstr  &&  sizeInBytes) {
+            if (n >= sizeInBytes) {
+                n = sizeInBytes - 1;
+            }
+            mbstr[n] = '\0';
+        }
+
+        /* Lenght of resulting multi-bytes string WITH zero-terminator */
+        if (pReturnValue) {
+            *pReturnValue = n + 1;
+        }
+
+        /* Success */
+        error = 0;
+
+    } else {
+
+        /* Cannot convert string */
+        error = 1;
+
+    }
+
+#endif
+#endif //DIRENT_USES_UTF8_CHARS
+    return error;
+}
+
+/* Set errno variable */
+static void
+dirent_set_errno(
+    int error)
+{
+#if defined(_MSC_VER)  &&  _MSC_VER >= 1400
+
+    /* Microsoft Visual Studio 2005 and later */
+    _set_errno (error);
+
+#else
+
+    /* Non-Microsoft compiler or older Microsoft compiler */
+    errno = error;
+
+#endif
+}
+
+
+// The code of this single method comes from the musl library
+// (MIT licensed, Copyright © 2005-2014 Rich Felker, et al.)
+inline static int scandir(const char *path, struct dirent ***res,
+    int (*sel)(const struct dirent *),
+    int (*cmp)(const struct dirent **, const struct dirent **))
+{
+    DIR *d = opendir(path);
+    struct dirent *de, **names=0, **tmp;
+    size_t cnt=0, len=0;
+    int old_errno = errno;
+
+    if (!d) return -1;
+
+    while ((errno=0), (de = readdir(d))) {
+        if (sel && !sel(de)) continue;
+        if (cnt >= len) {
+            len = 2*len+1;
+            if (len > SIZE_MAX/sizeof *names) break;
+            tmp = (dirent**)realloc(names, len * sizeof *names);
+            if (!tmp) break;
+            names = tmp;
+        }
+        names[cnt] = (dirent*)malloc(de->d_reclen);
+        if (!names[cnt]) break;
+        memcpy(names[cnt++], de, de->d_reclen);
+    }
+
+    closedir(d);
+
+    if (errno) {
+        if (names) while (cnt-->0) free(names[cnt]);
+        free(names);
+        return -1;
+    }
+    errno = old_errno;
+
+    if (cmp) qsort(names, cnt, sizeof *names, (int (*)(const void *, const void *))cmp);
+    *res = names;
+    return cnt;
+}
+
+
+// alphasort: Function to compare two `struct dirent's alphabetically.
+inline static int alphasort (const struct dirent **e1,const struct dirent **e2)    {
+    return strcmp((*e1)->d_name,(*e2)->d_name);
+}
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif /*DIRENT_H*/
+
+#endif //#if (!defined(_WIN32) && !defined(_WIN64))
diff --git a/src/deps/imguifilesystem/imguifilesystem.cpp b/src/deps/imguifilesystem/imguifilesystem.cpp
new file mode 100644
index 00000000..835f4a7f
--- /dev/null
+++ b/src/deps/imguifilesystem/imguifilesystem.cpp
@@ -0,0 +1,1655 @@
+// This software is provided 'as-is', without any express or implied
+// warranty.  In no event will the authors be held liable for any damages
+// arising from the use of this software.
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+// 1. The origin of this software must not be misrepresented; you must not
+//    claim that you wrote the original software. If you use this software
+//    in a product, an acknowledgment in the product documentation would be
+//    appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+//    misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+
+#include "imguifilesystem.h"
+
+#ifdef _WIN32
+#include <shlobj.h> // Known Directory locations
+#   ifndef CSIDL_MYPICTURES
+#       define CSIDL_MYPICTURES 0x0027
+#   endif //CSIDL_MYPICTURES
+#   ifndef CSIDL_MYMUSIC
+#       define CSIDL_MYMUSIC 0x000d
+#   endif //CSIDL_MYMUSIC
+#   ifndef CSIDL_MYVIDEO
+#       define CSIDL_MYVIDEO 0x000e
+#   endif //CSIDL_MYVIDEO
+#else // _WIN32
+#   include <unistd.h>     // getpwuid
+#   include <pwd.h>        // getenv ?
+#endif //#ifdef _WIN32
+
+#include "dirent_portable.h"
+#include <sys/stat.h>
+#include <ctype.h>  // tolower,...
+#include <string.h> // strcmp
+#include <stdio.h>  // FILENAME_MAX
+#include <new>      // operator new
+
+
+namespace ImGuiFs {
+
+const int MAX_FILENAME_BYTES = FILENAME_MAX;
+const int MAX_PATH_BYTES = PATH_MAX;
+enum Sorting {
+    SORT_ORDER_ALPHABETIC=0,
+    SORT_ORDER_ALPHABETIC_INVERSE=1,
+    SORT_ORDER_LAST_MODIFICATION=2,
+    SORT_ORDER_LAST_MODIFICATION_INVERSE=3,
+    SORT_ORDER_SIZE=4,
+    SORT_ORDER_SIZE_INVERSE=5,
+    SORT_ORDER_TYPE=6,
+    SORT_ORDER_TYPE_INVERSE=7,
+    SORT_ORDER_COUNT
+};
+
+// Definitions of some helper classes (String,Path,SortingHelper,Directory). Better not expose them in the header file----------
+/*
+// MAIN ISSUE: All these string handling methods work with ASCII strings,
+// but the ones returned by dirent are multibyte OS dependant strings.
+// That means that there are some limitations:
+
+// LIMITATIONS:
+// -> paths with '/','\\','.' bytes (and possibly a few others) inside multibyte codepoints are not supported       (*)
+// -> file extensions composed by characters with more than one byte are not supported                              (**)
+
+//(*) That's because when I call something like: mystring.find_last_of('/') or Path::Split('/')
+// the result might not be correct if there's some multibyte codepoint that includes that byte(s) (bytes include '/','\\','.').
+
+// (**) String::ToLower() deeply breaks any multibyte char.
+// They're currently used only in:
+// Path::GetExtension(...)
+// Directory::GetFiles(const string& path,const string& wantedExtensions,const string& unwantedExtensions)
+// That's because file extensions must be returned lowercase, so that e.g. ".PNG" and ".png" can be string matched (even on case sensitive file systems).
+*/
+class String    {
+protected:
+    String() {}
+public:
+    inline static void PushBack(ImVector<char[MAX_FILENAME_BYTES]>& rv,const char* s)    {
+        const size_t sz = rv.size();
+        rv.resize(sz+1);
+        strcpy(&rv[sz][0], s ? s : "\0");
+    }
+#   if (FILENAME_MAX!=PATH_MAX)    // Will this work ? (I don't want to use templates)
+    inline static void PushBack(ImVector<char[MAX_PATH_BYTES]>& rv,const char* s)    {
+        const size_t sz = rv.size();
+        rv.resize(sz+1);
+        strcpy(&rv[sz][0], s ? s : "\0");
+    }
+#   endif //#if (FILENAME_MAX!=PATH_MAX)
+    inline static void Substr(const char* text,char* rv,int start,int count=-1)    {
+        if (!text) count=0;
+        if (count<0) count = (int) strlen(text) - start;
+        if (count>0) strncpy(rv,&text[start],count);
+        rv[count]='\0';
+    }
+    inline static int Find(const char* text,const char toFind,int beg=0)   {
+        if (!text) return -1;
+        for (size_t i=beg,len=strlen(text);i<len;i++)    {
+            if (text[i]==toFind) return i;
+        }
+        return -1;
+    }
+    inline static int FindLastOf(const char* text,const char toFind)   {
+        if (!text) return -1;
+        for (int i=(int)strlen(text)-1;i>=0;i--)    {
+            if (text[i]==toFind) return i;
+        }
+        return -1;
+    }
+    inline static void ToLower(const char* text,char* rv)   {
+        if (!text) {
+            rv[0]='\0';
+            return;
+        }
+        const size_t len = strlen(text);
+        for (size_t i=0;i<len;i++)    {
+            rv[i]=tolower(text[i]);
+        }
+        rv[len]='\0';
+    }
+    inline static void ToLowerInPlace(char* text)  {
+        if (!text) return;
+        for (size_t i=0,len = strlen(text);i<len;i++)    {
+            char& c = text[i];
+            c=tolower(c);
+        }
+    }
+    inline static void Split(const char* text,ImVector<char[MAX_FILENAME_BYTES]>& rv,const char c=' ')  {
+        rv.clear();
+        if (!text) return;
+        const int len = (int)strlen(text);
+        if (len==0) return;
+        int beg = 0;char tmp[MAX_FILENAME_BYTES];
+        for (int i=0;i<len;i++)    {
+            const char ch = text[i];
+            if (ch==c) {
+                Substr(text,tmp,beg,i-beg);
+                PushBack(rv,tmp);
+                beg = i+1;
+            }
+        }
+        if (beg<len) {
+            Substr(text,tmp,beg,len-beg);
+            PushBack(rv,tmp);
+        }
+    }
+    inline static void Replace(const char*  baseText,const char textToReplace,const char replacement,char* rv)    {
+        strcpy(rv,baseText);
+        ReplaceInPlace(rv,textToReplace,replacement);
+    }
+    inline static void ReplaceInPlace(char* text,const char toReplace,const char replacement)  {
+        if (!text) return;
+        for (size_t i=0,len = strlen(text);i<len;i++)    {
+            char& c = text[i];
+            if (c==toReplace) c=replacement;
+        }
+    }
+
+#   ifdef _WIN32
+    // Convert a wide Unicode string to an UTF8 string
+    inline static void wide_to_utf8(const wchar_t* wstr,char* rv)    {
+        rv[0]='\0';
+        if (!wstr) return;
+        int size_needed = WideCharToMultiByte(CP_UTF8, 0, wstr, -1, NULL, 0, NULL, NULL);
+        WideCharToMultiByte                  (CP_UTF8, 0, wstr, -1, &rv[0], size_needed, NULL, NULL);
+        //rv[size_needed]='\0';              // If the parameter after wstr is -1, the function processes the entire input string, including the terminating null character. Therefore, the resulting character string has a terminating null character, and the length returned by the function includes this character.
+        return ;
+    }
+    // Convert an UTF8 string to a wide Unicode String
+    inline static void utf8_to_wide(const char* str,wchar_t* rv)    {
+        rv[0]=L'\0';
+        if (!str) return;
+        int size_needed = MultiByteToWideChar(CP_UTF8, 0, str, -1, NULL, 0);
+        MultiByteToWideChar                  (CP_UTF8, 0, str, -1, &rv[0], size_needed);
+        //rv[size_needed]=L'\0';            // // If the parameter after str is -1, the function processes the entire input string, including the terminating null character. Therefore, the resulting character string has a terminating null character, and the length returned by the function includes this character.
+        return;
+    }
+#   endif // _WIN32
+};
+class Path	{
+protected:
+    Path() {}
+public:
+
+    static void GetAbsolutePath(const char *path, char *rv)  {
+        rv[0]='\0';
+#   ifndef _WIN32
+        if (!path || strlen(path)==0) realpath("./", rv);
+        else realpath(path, rv);
+#   else //_WIN32
+        static const int bufferSize = PATH_MAX+1;   // 4097 is good (PATH_MAX should be in <limits.h>, or something like that)
+        static wchar_t buffer[bufferSize];
+        static wchar_t wpath[bufferSize];
+        String::utf8_to_wide(path ? path : "",wpath);
+        ::GetFullPathNameW(&wpath[0],bufferSize,&buffer[0],NULL);
+        String::wide_to_utf8(&buffer[0],rv);
+
+        String::ReplaceInPlace(rv,'\\','/');
+        size_t len;
+        while ( (len=strlen(rv))>0 && rv[len-1]=='/')  rv[len-1]='\0';
+        //fprintf(stderr,"AbsolutePath = \"%s\" (len:%d)\n",rv,(int) strlen(rv)); // TO remove!
+#   endif // _WIN32
+    }
+    static void GetDirectoryName(const char *filePath, char *rv) {
+        rv[0]='\0';if (!filePath) return;
+        const int sz = strlen(filePath);
+        if (sz==0 || strcmp(filePath,"/")==0 || strcmp(filePath,"\\")==0) {
+            strcpy(rv,filePath);
+            return;
+        }
+        const char c = filePath[sz-1];
+        if (c == '/' || c=='\\') {
+            char tmp[MAX_PATH_BYTES];
+            String::Substr(filePath,tmp,0,sz-1);
+            GetDirectoryName(tmp,rv);
+            return;
+        }
+
+        if (c==':') {
+            strcpy(rv,filePath);
+            return;
+        }
+        int beg=String::FindLastOf(filePath,'\\');
+        int beg2=String::FindLastOf(filePath,'/');
+        beg=(beg>beg2?beg:beg2);
+        if (beg==0) {
+            String::Substr(filePath,rv,0,1);
+            return;
+        }
+        if (beg!=-1) {
+            String::Substr(filePath,rv,0,beg);
+            return;
+        }
+        rv[0]='\0';
+        return;
+    }
+    static void GetFileName(const char *filePath, char *rv)  {
+        int beg=String::FindLastOf(filePath,'\\');
+        int beg2=String::FindLastOf(filePath,'/');
+        beg=(beg>beg2?beg:beg2);
+        if (beg!=-1) {
+            String::Substr(filePath,rv,beg+1);
+            return;
+        }
+        strcpy(rv,filePath);
+        return;
+    }
+    static void GetExtension(const char* filePath,char *rv) {
+        int beg=String::FindLastOf(filePath,'.');
+        int beg2=String::FindLastOf(filePath,'/');
+        int beg3=String::FindLastOf(filePath,'\\');
+        if (beg2!=-1)	{
+            if (beg3!=-1) beg2 = beg3;
+            else beg2 = beg2 > beg3 ? beg2 : beg3;
+        }
+        else if (beg3!=-1) beg2 = beg3;
+        else {
+            if (beg!=-1)  {
+                String::Substr(filePath,rv,beg);
+                String::ToLowerInPlace(rv);
+                return;
+            }
+        }
+        if (beg>beg2)  {
+            if (beg!=-1)  {
+                String::Substr(filePath,rv,beg);
+                String::ToLowerInPlace(rv);
+                return;
+            }
+        }
+        rv[0]='\0';
+        return;
+    }
+    static void Combine(const char* directory,const char* fileName,char* rv,bool appendMode=true)  {
+        if (!appendMode) rv[0]='\0';
+        const size_t size= directory ? strlen(directory) : 0;
+        if (size==0) {
+            strcat(rv,fileName);
+            return;
+        }
+        strcat(rv,directory);
+        if (directory[size-1]!='\\' && directory[size-1]!='/') {
+            strcat(rv,"/");
+            strcat(rv,fileName);
+        }
+        else strcat(rv,fileName);
+        return;
+    }
+    static void Append(const char* directory,char* rv)  {
+        if (!directory || strlen(directory)==0) return;
+        size_t size = strlen(rv);
+        if (size>0 && (rv[size-1]!='\\' && rv[size-1]!='/')) {strcat(rv,"/");++size;}
+        strcat(rv,directory);
+        size = strlen(rv);
+        while (size>0 && (rv[size-1]=='\\' || rv[size-1]=='/')) {rv[size-1]='\0';--size;}
+        if (size==0 || rv[size-1]==':') strcat(rv,"/");
+    }
+    static void Split(const char* path,ImVector<char[MAX_FILENAME_BYTES]>& rv,bool leaveIntermediateTrailingSlashes=true) {
+        rv.clear();
+        static char tex[MAX_PATH_BYTES];
+        String::Replace(path,'\\','/',tex);
+        size_t len = strlen(tex);
+        static char tex2[MAX_PATH_BYTES];
+#   ifdef _WIN32
+        while ((len = strlen(tex))>0 && tex[len-1]=='/') {
+            strncpy(tex2,tex,len+1);
+            String::Substr(tex2,tex,0,len-1);
+        }
+#   endif //_WIN32
+        if (len==0) return;
+        int beg=-1;
+        while ( (beg = String::Find(tex,'/'))!=-1) {
+            static char tmp[MAX_FILENAME_BYTES];
+            String::Substr(tex,tmp,0,leaveIntermediateTrailingSlashes ? beg+1 : beg);
+            String::PushBack(rv,tmp);
+            strcpy(tex2,tex);
+            String::Substr(tex2,tex,beg+1);
+        }
+        String::PushBack(rv,tex);
+        if (rv.size()>0 && strlen(rv[0])==0) strcpy((char*)&rv[0][0],"/\0");
+#   ifdef _WIN32
+        if (rv.size()==1 && strlen(rv[0])>0 && rv[0][strlen(rv[0])-1]==':') strcat((char*)&rv[0][0],"/");
+#   endif //_WIN32
+        return;
+    }
+    /*
+    inline static bool Exists(const char* path) 	{
+        struct stat statbuf;
+        return (stat(path, &statbuf) != -1);
+    }
+    */
+};
+/*
+class File {
+public:
+    inline static bool Exists(const char* filePath) {
+        struct stat statbuf;
+        return (stat(path, &statbuf) != -1 && (S_ISREG(statbuf.st_mode)));// || (acceptLinks ? S_ISLNK(statbuf.st_mode) : 1));
+    }
+protected:
+    File() {}
+};
+*/
+class SortingHelper {
+public:
+    typedef int (*SorterSignature)(const struct dirent **e1,const struct dirent **e2);
+    inline static const SorterSignature& SetSorter(Sorting sorting) {
+        const int isort =(int) sorting;
+        if (isort>=0 && isort<(int)SORT_ORDER_COUNT) return (sorter = Sorters[isort]);
+        return (sorter = Sorters[0]);
+    }
+protected:
+    SortingHelper() {}
+    const static SorterSignature Sorters[];
+    static struct stat stat1;
+    static struct stat stat2;
+    static SorterSignature sorter;
+#   ifdef MSC_VER
+    // Never tested (I've just been told that cl.exe does not have strcasecmp: please search the web for other possible alternative implementations)
+    inline static int strcasecmp( const char *s1, const char *s2 )  {
+        return _stricmp(s1,s2);
+        //return lstrcmpiA(s1,s2);  // Not sure this is better
+    }
+#   endif //MSC_VER
+    // Possible problem: sorting is in ASCII with these methods
+    static int Alphasort(const struct dirent **e1,const struct dirent **e2)    {
+        return strcasecmp((*e1)->d_name,(*e2)->d_name);
+    }
+    static int Alphasortinverse (const struct dirent **e1,const struct dirent **e2)    {
+        return -strcasecmp((*e1)->d_name,(*e2)->d_name);
+    }
+    // Please note that calling stat(...) every time inside sorters is a suicide! And that I'm doing right that! (but I guess and hope that on many systems the calls get cached somewhere: otherwise it would take ages to sort)
+    static int Lastmodsort (const struct dirent **e1,const struct dirent **e2)    {
+        if (stat((*e1)->d_name,&stat1)==-1) return -1;
+        if (stat((*e2)->d_name,&stat2)==-1) return  1;
+        return (stat1.st_mtime < stat2.st_mtime ? -1 : stat1.st_mtime > stat2.st_mtime ? 1 : 0);
+    }
+    static int Lastmodsortinverse(const struct dirent **e1,const struct dirent **e2)    {
+        if (stat((*e1)->d_name,&stat1)==-1) return  1;
+        if (stat((*e2)->d_name,&stat2)==-1) return -1;
+        return (stat2.st_mtime < stat1.st_mtime ? -1 : stat2.st_mtime > stat1.st_mtime ? 1 : 0);
+    }
+    static int Sizesort (const struct dirent **e1,const struct dirent **e2)    {
+        if (stat((*e1)->d_name,&stat1)==-1) return -1;
+        if (stat((*e2)->d_name,&stat2)==-1) return  1;
+        return (stat1.st_size < stat2.st_size ? -1 : stat1.st_size > stat2.st_size ? 1 : 0);
+    }
+    static int Sizesortinverse(const struct dirent **e1,const struct dirent **e2)    {
+        if (stat((*e1)->d_name,&stat1)==-1) return  1;
+        if (stat((*e2)->d_name,&stat2)==-1) return -1;
+        return (stat2.st_size < stat1.st_size ? -1 : stat2.st_size > stat1.st_size ? 1 : 0);
+    }
+    // Please note that calculating the file extension every time inside sorters is a suicide (well, much less than before...)!
+    static int Typesort(const struct dirent **e1,const struct dirent **e2)    {
+        static const int dot = (int) '.';
+        const char * p1 = strrchr((const char*) (*e1)->d_name, dot );
+        const char * p2 = strrchr((const char*) (*e2)->d_name, dot );
+        if (!p1) return (!p2?0:-1);
+        else if (!p2)   return 1;
+        return strcasecmp(p1,p2);
+    }
+    static int Typesortinverse (const struct dirent **e1,const struct dirent **e2)    {
+        static const int dot = (int) '.';
+        const char * p1 = strrchr((const char*) (*e1)->d_name, dot );
+        const char * p2 = strrchr((const char*) (*e2)->d_name, dot );
+        if (!p1) return (!p2?0:1);
+        else if (!p2)   return -1;
+        return -strcasecmp(p1,p2);
+    }
+
+};
+const SortingHelper::SorterSignature SortingHelper::Sorters[] = {&SortingHelper::Alphasort,&SortingHelper::Alphasortinverse,&SortingHelper::Lastmodsort,&SortingHelper::Lastmodsortinverse,&SortingHelper::Sizesort,&SortingHelper::Sizesortinverse,&Typesort,&SortingHelper::Typesortinverse};
+SortingHelper::SorterSignature SortingHelper::sorter;
+struct stat SortingHelper::stat1;
+struct stat SortingHelper::stat2;
+class Directory {
+public:
+    static void GetDirectories(const char* directoryName,ImVector<char[MAX_PATH_BYTES]>& result,ImVector<char[MAX_FILENAME_BYTES]>* pOptionalNamesOut=NULL,Sorting sorting= SORT_ORDER_ALPHABETIC)   {
+        result.clear();if (pOptionalNamesOut) pOptionalNamesOut->clear();
+        static char tempString[MAX_PATH_BYTES];size_t sz;
+        struct dirent **eps = NULL;
+
+        sz = strlen(directoryName);
+        static char directoryName2[MAX_PATH_BYTES];
+        strcpy(directoryName2,directoryName);
+#       ifdef _WIN32
+        if (sz>0 && directoryName[sz-1]==':') {directoryName2[sz]='\\';directoryName2[sz+1]='\0';}
+#       endif //_WIN32
+        const int n = scandir (directoryName2, &eps, DirentGetDirectories, SortingHelper::SetSorter(sorting));
+
+        static char directoryNameWithoutSlash[MAX_PATH_BYTES];
+        if (sz>0 && directoryName[sz-1] == '/') String::Substr(directoryName,directoryNameWithoutSlash,0,sz-1);
+        else strcpy(directoryNameWithoutSlash,directoryName);
+
+        if (n >= 0) {
+            result.reserve((size_t)n);if (pOptionalNamesOut) pOptionalNamesOut->reserve((size_t)n);
+            for (int cnt = 0; cnt < n; ++cnt)    {
+                const char* pName = &eps[cnt]->d_name[0];
+                sz = strlen(pName);
+                if (sz==0) continue;
+                if (strcmp(pName,".")!=0 && strcmp(pName,"..")!=0 && pName[0]!='.' && pName[sz-1]!='~')    {
+                    strcpy(tempString,directoryNameWithoutSlash);
+                    strcat(tempString,"/");
+                    strcat(tempString,pName);
+                    String::PushBack(result,tempString);
+                    if (pOptionalNamesOut) String::PushBack(*pOptionalNamesOut,pName);
+                }
+            }
+        }
+        if (eps) {free(eps);eps=NULL;}
+    }
+    static void GetFiles(const char* directoryName,ImVector<char[MAX_PATH_BYTES]>& result,ImVector<char[MAX_FILENAME_BYTES]>* pOptionalNamesOut=NULL, Sorting sorting= SORT_ORDER_ALPHABETIC)    {
+        result.clear();if (pOptionalNamesOut) pOptionalNamesOut->clear();
+        static char tempString[MAX_PATH_BYTES];size_t sz;
+        struct dirent **eps = NULL;
+
+        sz = strlen(directoryName);
+        static char directoryName2[MAX_PATH_BYTES];
+        strcpy(directoryName2,directoryName);
+#       ifdef _WIN32
+        if (sz>0 && directoryName[sz-1]==':') {directoryName2[sz]='\\';directoryName2[sz+1]='\0';}
+#       endif //_WIN32
+        const int n = scandir (directoryName2, &eps, DirentGetFiles, SortingHelper::SetSorter(sorting));
+
+        static char directoryNameWithoutSlash[MAX_PATH_BYTES];
+        if (sz>0 && directoryName[sz-1] == '/') String::Substr(directoryName,directoryNameWithoutSlash,0,sz-1);
+        else strcpy(directoryNameWithoutSlash,directoryName);
+
+        if (n >= 0) {
+            result.reserve((size_t)n);if (pOptionalNamesOut) pOptionalNamesOut->reserve((size_t)n);
+            for (int cnt = 0; cnt < n; ++cnt)    {
+                const char* pName = &eps[cnt]->d_name[0];
+                sz = strlen(pName);
+                if (sz==0) continue;
+                if (pName[0]!='.' && pName[sz-1]!='~')    {
+                    strcpy(tempString,directoryNameWithoutSlash);
+                    strcat(tempString,"/");
+                    strcat(tempString,pName);
+                    String::PushBack(result,tempString);
+                    if (pOptionalNamesOut) String::PushBack(*pOptionalNamesOut,pName);
+                }
+            }
+        }
+        if (eps) {free(eps);eps=NULL;}
+    }
+
+    // e.g. ".txt;.jpg;.png". To use unwantedExtensions, set wantedExtensions="".
+    static void GetFiles(const char* path,ImVector<char[MAX_PATH_BYTES]>& files,const char* wantedExtensions,const char* unwantedExtensions=NULL,ImVector<char[MAX_FILENAME_BYTES]>* pOptionalNamesOut=NULL,Sorting sorting= SORT_ORDER_ALPHABETIC)    {
+        ImVector<char[MAX_PATH_BYTES]> filesIn;
+        ImVector<char[MAX_FILENAME_BYTES]> namesIn;
+        GetFiles(path,filesIn,&namesIn,sorting);
+        if ((wantedExtensions==0 || strlen(wantedExtensions)==0) && (unwantedExtensions==0 || strlen(unwantedExtensions)==0)) {files = filesIn;return;}
+        files.clear();if (pOptionalNamesOut) pOptionalNamesOut->clear();
+
+        char wext[MAX_PATH_BYTES];String::ToLower(wantedExtensions,wext);
+        char woext[MAX_PATH_BYTES];String::ToLower(unwantedExtensions,woext);
+
+        char ext[MAX_PATH_BYTES];
+        if (wantedExtensions && strlen(wantedExtensions)>0)	{
+            files.reserve(filesIn.size());if (pOptionalNamesOut) pOptionalNamesOut->reserve(namesIn.size());
+            ImVector<char[MAX_FILENAME_BYTES]> wExts;String::Split(wext,wExts,';');
+            const size_t wExtsSize = wExts.size();
+            if (wExtsSize>0)	{
+                for (size_t i = 0,sz = filesIn.size();i<sz;i++)	{
+                    Path::GetExtension(filesIn[i],ext);
+                    for (size_t e=0;e<wExtsSize;e++)	{
+                        if (strcmp(ext,wExts[e])==0) {
+                            String::PushBack(files,filesIn[i]);
+                            if (pOptionalNamesOut) String::PushBack(*pOptionalNamesOut,namesIn[i]);
+                        }
+                    }
+                }
+            }
+            else return;
+        }
+        else if (unwantedExtensions && strlen(unwantedExtensions)>0) {
+            files.reserve(filesIn.size());if (pOptionalNamesOut) pOptionalNamesOut->reserve(namesIn.size());
+            ImVector<char[MAX_FILENAME_BYTES]> woExts;String::Split(woext,woExts,';');
+            const size_t woExtsSize = woExts.size();
+            if (woExts.size()==0) {files = filesIn;return;}
+            bool match;
+            for (size_t i = 0,sz = filesIn.size();i<sz;i++)	{
+                Path::GetExtension(filesIn[i],ext);
+                match = false;
+                for (size_t e=0;e<woExtsSize;e++)	{
+                    if (strcmp(ext,woExts[e])==0) {
+                        match = true;
+                        break;
+                    }
+                }
+                if (!match) {
+                    String::PushBack(files,filesIn[i]);
+                    if (pOptionalNamesOut) String::PushBack(*pOptionalNamesOut,namesIn[i]);
+                }
+            }
+        }
+        else {
+            files = filesIn;
+            if (pOptionalNamesOut) *pOptionalNamesOut = namesIn;
+        }
+    }
+
+    inline static void Create(const char* directoryName)   {
+#       ifndef _WIN32
+        const mode_t mode = S_IFDIR | S_IREAD | S_IWRITE | S_IRWXU | S_IRWXG | S_IRWXO;
+        mkdir(directoryName,mode);
+#       else //_WIN32
+        static wchar_t name[PATH_MAX+1];
+        String::utf8_to_wide(directoryName,name);
+        ::CreateDirectoryW(name,NULL);
+#       endif //_WIN32
+    }
+
+    inline static bool Exists(const char* path) {
+        struct stat statbuf;
+        return (stat(path, &statbuf) != -1 && S_ISDIR(statbuf.st_mode));
+    }
+    inline static const ImVector<char[MAX_PATH_BYTES]> &GetUserKnownDirectories(const ImVector<char[MAX_FILENAME_BYTES]> **pOptionalUserKnownDirectoryDisplayNamesOut,const int** pOptionalNumberKnownUserDirectoriesExceptDrives=NULL,bool forceUpdate=false)  {
+        static bool init = false;
+        static ImVector<char[MAX_PATH_BYTES]> rv;
+        static ImVector<char[MAX_FILENAME_BYTES]> dn;
+        static ImVector<char[MAX_PATH_BYTES]> mediaFolders;
+        static int numberKnownUserDirectoriesExceptDrives = 0;
+        if (pOptionalUserKnownDirectoryDisplayNamesOut) *pOptionalUserKnownDirectoryDisplayNamesOut = &dn;
+        if (pOptionalNumberKnownUserDirectoriesExceptDrives) *pOptionalNumberKnownUserDirectoriesExceptDrives = &numberKnownUserDirectoriesExceptDrives;
+        if (init && !forceUpdate) return rv;
+        init = true;
+        rv.clear();dn.clear();
+#       ifdef _WIN32
+        static const int csid[] = {
+            CSIDL_DESKTOP,
+            CSIDL_PERSONAL, //(Documents)
+            CSIDL_FAVORITES,
+            CSIDL_MYMUSIC,
+            CSIDL_MYPICTURES,
+            CSIDL_RECENT,
+            CSIDL_MYVIDEO
+        };
+        static const char* name[] = {
+            "Desktop",
+            "Documents",
+            "Favorites",
+            "Music",
+            "Pictures",
+            "Recent",
+            "Video"
+        };
+        static const int csidSize = sizeof(csid)/sizeof(csid[0]);
+        static const int nameSize = sizeof(name)/sizeof(name[0]);
+        IM_ASSERT(csidSize==nameSize);
+        if (csidSize!=nameSize) fprintf(stderr,"ERROR in file: imguifilesystem.cpp. Directory::GetUserKnownDirectories(...) csidSize!=nameSize.\n");
+        char tmp[MAX_PATH_BYTES] = "C:/";while (tmp[0]<='Z') {if (Directory::Exists(tmp)) String::PushBack(mediaFolders,tmp);tmp[0]=(char)((int)tmp[0]+1);}
+        rv.reserve(csidSize+mediaFolders.size());
+        dn.reserve(csidSize+mediaFolders.size());
+        WCHAR path[MAX_PATH+1];
+        for (int i=0;i<csidSize;i++)    {
+            if (!GetSpecialFolderPathW(csid[i],&path[0],NULL)) continue;
+            static char tmp2[MAX_PATH_BYTES];
+            String::wide_to_utf8(&path[0],tmp2);
+            String::PushBack(rv,tmp2);
+            String::PushBack(dn,name[i]);
+        }
+        numberKnownUserDirectoriesExceptDrives = (int) rv.size();
+        static char mediaFolderName[MAX_PATH_BYTES];
+        for (int i=0,msz=mediaFolders.size();i<msz;i++)    {
+            const char* mediaFolder = mediaFolders[i];
+            String::PushBack(rv,mediaFolder);
+            String::Substr(mediaFolder,mediaFolderName,0,strlen(mediaFolder)-1);
+            String::PushBack(dn,mediaFolderName);
+        }
+#       else //_WIN32
+        const char* homedir = NULL;
+        if ((homedir = getenv("HOME")) == NULL) {
+            homedir = getpwuid(getuid())->pw_dir;
+        }
+        if (homedir==NULL) return rv;
+        char homeString[MAX_PATH_BYTES];strcpy(homeString,homedir);
+        char userString[MAX_PATH_BYTES];Path::GetFileName(homeString,userString);
+        // Known folders ---------------------------------------------
+        static const char folder[][MAX_FILENAME_BYTES] = {
+            "Desktop",
+            "Documents",
+            "Downloads",
+            "Music",
+            "Pictures",
+            "Videos"
+        };
+        static const int folderSize = sizeof(folder)/sizeof(folder[0]);
+        rv.reserve(folderSize+1);
+        dn.reserve(rv.size());
+        String::PushBack(rv,homeString);
+        char temp[MAX_PATH_BYTES];
+        strcpy(temp,"Home");
+        String::PushBack(dn,temp);
+        for (int i=0;i<folderSize;i++)    {
+            Path::Combine(homeString,folder[i],temp,false);
+            if (Directory::Exists(temp)) {
+                String::PushBack(rv,temp);
+                String::PushBack(dn,folder[i]);
+            }
+        }
+        numberKnownUserDirectoriesExceptDrives = (int) rv.size();
+        // Additional Drives --------------------------------------------
+        static const char* mountLocations[] = {"/media","/mnt","/Volumes","/vol","/data"};
+        static const int mountLocationSize = sizeof(mountLocations)/sizeof(mountLocations[0]);
+        static const bool ifHomeSubfolerIsFoundInMountLocationsForgetThatRootMountLocation = true;  // That means: if "/media/myusername" exists, don't add any other "/media/..." entries.
+        char userMediaString[MAX_PATH_BYTES];bool lastGood = false;
+        for (int mntLocIndex=0,sz = 2*mountLocationSize;mntLocIndex<sz;mntLocIndex++) {
+            const int index = mntLocIndex/2;
+            const char* mntLocString = mountLocations[index];
+            const bool useUserSuffix = (mntLocIndex%2)==0;
+            if (useUserSuffix) {
+                Path::Combine(mntLocString,userString,userMediaString,false);
+                strcpy(temp,userMediaString);
+            }
+            else if (lastGood && ifHomeSubfolerIsFoundInMountLocationsForgetThatRootMountLocation) {lastGood = false;continue;} // see "ifHomeSubfolerIsFoundInMountLocationsForgetThatRootMountLocation" above
+            else strcpy(userMediaString,mntLocString);
+            lastGood = Directory::Exists(userMediaString);
+            if (!lastGood) continue;
+            Directory::GetDirectories(userMediaString,mediaFolders);
+            if (mediaFolders.size()==0) continue;
+            rv.reserve(rv.size()+mediaFolders.size());
+            dn.reserve(rv.size());
+            for (int i=0,msz=mediaFolders.size();i<msz;i++)    {
+                if (strcmp(mediaFolders[i],temp)==0) continue;  // I we have processed "/media/myusername" once cycle before, exclude it from processing "/media" subfolders
+                String::PushBack(rv,mediaFolders[i]);
+                static char tmp[MAX_FILENAME_BYTES];
+                Path::GetFileName(mediaFolders[i],tmp);
+                String::PushBack(dn,tmp);
+            }
+        }
+#       endif //_WIN32
+
+        return rv;
+    }
+
+
+protected:
+    Directory() {}
+
+    static int DirentGetDirectories(const struct dirent *de) {
+        if (de->d_type==DT_DIR) return 1;
+        return 0;
+    }
+    static int DirentGetFiles(const struct dirent *de) {
+        if (de->d_type==DT_REG) return 1;
+        return 0;
+    }
+
+#   ifdef _WIN32
+    static bool GetSpecialFolderPathW(int specialFolderCSIDL,WCHAR* pathOutWithSizeMaxPathPlusOne,HWND parent)  {
+        //	CSIDL_DESKTOP,CSIDL_BITBUCKET,CSIDL_CONTROLS,CSIDL_DESKTOP,CSIDL_DESKTOPDIRECTORY,
+        //	CSIDL_DRIVES,CSIDL_FONTS,CSIDL_NETHOOD,CSIDL_NETWORK,CSIDL_PERSONAL (Documents)
+        //	CSIDL_PRINTERS,CSIDL_PROGRAMS,CSIDL_RECENT,CSIDL_SENDTO,CSIDL_STARTMENU,
+        //	CSIDL_STARTUP,CSIDL_TEMPLATES
+
+        //	CSIDL_INTERNET_CACHE,CSIDL_COOKIES,CSIDL_HISTORY,CSIDL_COMMON_APPDATA,
+        //	CSIDL_WINDOWS,CSIDL_SYSTEM,CSIDL_PROGRAM_FILES,CSIDL_MYPICTURES,...
+
+        WCHAR* temp_path = pathOutWithSizeMaxPathPlusOne;//[MAX_PATH+1];
+        temp_path[0]=L'\0';
+        LPITEMIDLIST pidl=NULL;
+        if (!SUCCEEDED(::SHGetSpecialFolderLocation(parent,specialFolderCSIDL, &pidl)))
+        {
+            temp_path[0]=L'\0';return false;
+        }
+        bool ok=SUCCEEDED(::SHGetPathFromIDListW(pidl,&temp_path[0]));
+
+        LPMALLOC mal = NULL;
+        if ( ::SHGetMalloc( & mal ) == E_FAIL || !mal )	::free( pidl );
+        else
+        {
+            mal->Free( pidl );
+            mal->Release();
+        }
+        if (!ok)
+        {
+            temp_path[0]=L'\0';return false;
+        }
+        return true;
+    }
+#   endif //_WIN32
+
+};
+// End definitions of some helper classes----------------------------------------------------------------------------------------
+
+
+// Internal usage----------------------------------------------------------------------------------------
+struct FolderInfo    {
+    char fullFolder[MAX_PATH_BYTES];
+    char currentFolder[MAX_PATH_BYTES];
+    int splitPathIndex;
+    static ImVector<char[MAX_FILENAME_BYTES]> SplitPath;    // tmp field used internally
+
+    void display() const {
+        fprintf(stderr,"fullFolder=\"%s\" currentFolder=\"%s\" splitPathIndex=%d\n",fullFolder,currentFolder,splitPathIndex);
+    }
+    void getSplitPath(ImVector<char[MAX_FILENAME_BYTES]>& splitPath) const   {
+        Path::Split(fullFolder,splitPath);
+    }
+    const FolderInfo& operator=(const FolderInfo& o) {
+        strcpy(currentFolder,o.currentFolder);
+        strcpy(fullFolder,o.fullFolder);
+        splitPathIndex = o.splitPathIndex;
+        return *this;
+    }
+    inline void reset() {
+        currentFolder[0]='\0';fullFolder[0]='\0';splitPathIndex=-1;
+    }
+    FolderInfo() {reset();}
+    FolderInfo(const FolderInfo& o) {*this=o;}
+
+    void fromCurrentFolder(const char* path)   {
+        if (!path || strlen(path)==0) reset();
+        else {
+            strcpy(currentFolder,path);
+            strcpy(fullFolder,path);
+            Path::Split(fullFolder,SplitPath);
+            splitPathIndex = (int) SplitPath.size()-1;
+        }
+    }
+    bool isEqual(const FolderInfo& fi) const {
+        return strcmp(fullFolder,fi.fullFolder)==0 && strcmp(currentFolder,fi.currentFolder)==0;
+    }
+    bool isEqual(const char* path) const {
+        return strcmp(fullFolder,path)==0 && strcmp(currentFolder,path)==0;
+    }
+    int getSplitPathIndexFor(const char* path) const {
+        if (!path || strncmp(path,fullFolder,strlen(path))!=0) return -1;
+
+        Path::Split(fullFolder,SplitPath);
+        char tmp[MAX_PATH_BYTES];tmp[0]='\0';
+        for (int i=0,sz=(int)SplitPath.size();i<sz;i++)    {
+            Path::Append(SplitPath[i],tmp);
+            //fprintf(stderr,"%d) \"%s\" <-> \"%s\"\n",i,tmp,path);
+            if (strcmp(tmp,path)==0) return i;
+        }
+        return -1;
+    }
+    bool getFolderInfoForSplitPathIndex(int _splitPathIndex,FolderInfo& rv) const {
+        Path::Split(fullFolder,SplitPath);
+        const int splitPathSize = (int)SplitPath.size();
+        if (_splitPathIndex<0 || _splitPathIndex>=splitPathSize) return false;
+        rv = *this;
+        rv.splitPathIndex = _splitPathIndex;
+
+        rv.currentFolder[0]='\0';
+        if (_splitPathIndex>=0 && _splitPathIndex<splitPathSize) {
+            for (int i=0;i<=_splitPathIndex;i++)    {
+                Path::Append(SplitPath[i],rv.currentFolder);
+                //fprintf(stderr,"%d) \"%s\" (\"%s\")\n",i,rv.currentFolder,SplitPath[i]);
+            }
+        }
+        /*fprintf(stderr,"getFolderInfoForSplitPathIndex(%d):\nSource:    ",_splitPathIndex);
+        this->display();
+        fprintf(stderr,"Result:   ");
+        rv.display();*/
+        return true;
+    }
+};
+ImVector<char[MAX_FILENAME_BYTES]> FolderInfo::SplitPath;   // tmp field used internally
+struct History {
+protected:
+    ImVector<FolderInfo> info;
+    int currentInfoIndex;  // into info
+public:
+    inline bool canGoBack()    {
+        return currentInfoIndex>0;
+    }
+    inline bool canGoForward()   {
+        return currentInfoIndex>=0 && currentInfoIndex<(int)info.size()-1;
+    }
+    void reset() {info.clear();currentInfoIndex=-1;}
+    History() {reset();}
+
+    // -------------------------------------------------------------------------------------------------
+    void goBack()   {
+        if (canGoBack()) --currentInfoIndex;
+    }
+    void goForward()    {
+        if (canGoForward()) ++currentInfoIndex;
+    }
+    bool switchTo(const char* currentFolder)    {
+        if (!currentFolder || strlen(currentFolder)==0) return false;
+        if (currentInfoIndex<0) {
+            ++currentInfoIndex;
+            info.resize(currentInfoIndex+1);
+            FolderInfo& fi = info[currentInfoIndex];
+            fi.fromCurrentFolder(currentFolder);
+            return true;
+        }
+        else {
+            const FolderInfo& lastInfo = info[currentInfoIndex];
+            if (lastInfo.isEqual(currentFolder)) return false;
+            const int splitPathIndexInsideLastInfo = lastInfo.getSplitPathIndexFor(currentFolder);
+            ++currentInfoIndex;
+            info.resize(currentInfoIndex+1);
+            FolderInfo& fi = info[currentInfoIndex];
+            if (splitPathIndexInsideLastInfo==-1)   fi.fromCurrentFolder(currentFolder);
+            else {
+                fi = lastInfo;
+                fi.splitPathIndex = splitPathIndexInsideLastInfo;
+                strcpy(fi.currentFolder,currentFolder);
+            }
+            return true;
+        }
+    }
+    bool switchTo(const FolderInfo& fi) {
+        if (!fi.currentFolder || strlen(fi.currentFolder)==0) return false;
+        if (currentInfoIndex>=0) {
+            const FolderInfo& lastInfo = info[currentInfoIndex];
+            if (lastInfo.isEqual(fi)) return false;
+        }
+        ++currentInfoIndex;
+        info.resize(currentInfoIndex+1);
+        info[currentInfoIndex] = fi;
+        return true;
+    }
+    //-----------------------------------------------------------------------------------------------------
+
+    inline bool isValid() const {return (currentInfoIndex>=0 && currentInfoIndex<(int)info.size());}
+    const FolderInfo* getCurrentFolderInfo() const {return isValid() ? &info[currentInfoIndex] : NULL;}
+    const char* getCurrentFolder() const {return isValid() ? &info[currentInfoIndex].currentFolder[0] : NULL;}
+    bool getCurrentSplitPath(ImVector<char[MAX_FILENAME_BYTES]>& rv) const {
+        if (isValid()) {
+            info[currentInfoIndex].getSplitPath(rv);
+            return true;
+        }
+        else return false;
+    }
+    const int* getCurrentSplitPathIndex() const {return isValid() ? &info[currentInfoIndex].splitPathIndex : NULL;}
+    size_t getInfoSize() const {return info.size();}
+};
+
+struct Internal {
+    ImVector<char[MAX_PATH_BYTES]> dirs,files;
+    ImVector<char[MAX_FILENAME_BYTES]> dirNames,fileNames,currentSplitPath;
+    char currentFolder[MAX_PATH_BYTES];
+    bool forceRescan;
+    bool open;
+    ImVec2 wndPos;
+    ImVec2 wndSize;
+    char wndTitle[MAX_PATH_BYTES];
+    int sortingMode;
+
+    History history;
+    //-----------------------------------------------------
+    bool isSelectFolderDialog;
+    bool isSaveFileDialog;
+
+    bool allowDirectoryCreation,forbidDirectoryCreation;
+    bool allowKnownDirectoriesSection;
+    char newDirectoryName[MAX_FILENAME_BYTES];
+    char saveFileName[MAX_FILENAME_BYTES];
+    //----------------------------------------------------
+
+    char chosenPath[MAX_PATH_BYTES];
+    bool rescan;
+    int uniqueNumber;
+
+    ImGuiTextFilter filter;
+    bool allowFiltering;
+
+    int totalNumBrowsingEntries;
+    int numBrowsingColumns;
+    int numBrowsingEntriesPerColumn;
+    static bool BrowsingPerRow;
+    bool allowDisplayByOption;
+
+    bool detectKnownDirectoriesAtEveryOpening;
+    bool mustFilterSaveFilePathWithFileFilterExtensionString;
+
+    bool editLocationCheckButtonPressed;
+    char editLocationInputText[MAX_PATH_BYTES];
+
+
+    void resetVariables() {
+        strcpy(currentFolder,"./");
+        forceRescan = false;
+        open = true;
+
+        wndTitle[0] = '\0';
+        sortingMode = 0;
+
+        history.reset();
+
+        isSelectFolderDialog = false;
+        isSaveFileDialog = false;
+
+        allowDirectoryCreation = true;
+        forbidDirectoryCreation = false;
+        strcpy(newDirectoryName,"New Folder");
+        saveFileName[0] = '\0';
+
+        uniqueNumber = 0;
+
+        rescan = true;
+        chosenPath[0] = '\0';
+
+        filter.Clear();
+        allowFiltering = false;
+
+        totalNumBrowsingEntries = 0;
+        numBrowsingColumns = 1;
+        numBrowsingEntriesPerColumn = 1000;
+
+        detectKnownDirectoriesAtEveryOpening = false;
+        allowDisplayByOption = false;
+        allowKnownDirectoriesSection = true;
+
+        mustFilterSaveFilePathWithFileFilterExtensionString = true;
+
+        editLocationCheckButtonPressed = false;
+        strcpy(editLocationInputText,"\0");
+    }
+
+    // Just a convenience enum used internally
+    enum Color {
+        ImGuiCol_Dialog_Directory_Background,
+        ImGuiCol_Dialog_Directory_Hover,
+        ImGuiCol_Dialog_Directory_Pressed,
+        ImGuiCol_Dialog_Directory_Text,
+
+        ImGuiCol_Dialog_File_Background,
+        ImGuiCol_Dialog_File_Hover,
+        ImGuiCol_Dialog_File_Pressed,
+        ImGuiCol_Dialog_File_Text,
+
+        ImGuiCol_Dialog_SelectedFolder_Text,
+        ImGuiCol_Dialog_Size
+
+    };
+    inline static void ColorCombine(ImVec4& c,const ImVec4& r,const ImVec4& factor)   {
+        const float rr = (r.x+r.y+r.z)*0.3334f;
+        c.x = rr * factor.x;c.y = rr * factor.y;c.z = rr * factor.z;c.w = r.w;
+    }
+};
+bool Internal::BrowsingPerRow = false;
+// End Internal Usage-------------------------------------------------------------------------------------
+
+Dialog::Dialog(bool noKnownDirectoriesSection,bool noCreateDirectorySection,bool noFilteringSection,bool detectKnownDirectoriesAtEachOpening,bool addDisplayByOption,bool dontFilterSaveFilePathsEnteredByTheUser)    {
+    internal = (Internal*) ImGui::MemAlloc(sizeof(Internal));
+    new(internal) Internal();
+
+    internal->resetVariables();
+    static int un = 0;
+    internal->uniqueNumber = un++;
+
+    internal->detectKnownDirectoriesAtEveryOpening = detectKnownDirectoriesAtEachOpening;
+    internal->allowDisplayByOption = addDisplayByOption;
+    internal->forbidDirectoryCreation = noCreateDirectorySection;
+    internal->allowKnownDirectoriesSection = !noKnownDirectoriesSection;
+    internal->allowFiltering = !noFilteringSection;
+    internal->mustFilterSaveFilePathWithFileFilterExtensionString = !dontFilterSaveFilePathsEnteredByTheUser;
+}
+Dialog::~Dialog()   {
+    if (internal) {
+        ImGui::MemFree(internal);
+        //delete internal;
+        internal = NULL;
+    }
+}
+const char* Dialog::getChosenPath() const {return internal->chosenPath;}
+const char* Dialog::getLastDirectory() const {return internal->currentFolder;}
+
+// -- from imgui.cpp --
+static size_t ImFormatString(char* buf, size_t buf_size, const char* fmt, ...)
+{
+    va_list args;
+    va_start(args, fmt);
+    int w = vsnprintf(buf, buf_size, fmt, args);
+    va_end(args);
+    buf[buf_size-1] = 0;
+    return (w == -1) ? buf_size : (size_t)w;
+}
+// ---------------------
+
+// 90% of the functionality of the whole imguifilesystem.cpp is inside this single method
+const char* ChooseFileMainMethod(Dialog& ist,const char* directory,const bool _isFolderChooserDialog,const bool _isSaveFileDialog,const char* _saveFileName,const char* fileFilterExtensionString,const char* windowTitle,const ImVec2& windowSize,const ImVec2& windowPos,const float windowAlpha) {
+    //-----------------------------------------------------------------------------
+    Internal& I = *ist.internal;
+    char* rv = I.chosenPath;rv[0] = '\0';
+    //-----------------------------------------------------
+    bool& isSelectFolderDialog = I.isSelectFolderDialog = _isFolderChooserDialog;
+    bool& isSaveFileDialog = I.isSaveFileDialog = _isSaveFileDialog;
+
+    bool& allowDirectoryCreation = I.allowDirectoryCreation = I.forbidDirectoryCreation ? false : (isSelectFolderDialog || isSaveFileDialog);
+    //----------------------------------------------------------
+    static const int* pNumberKnownUserDirectoriesExceptDrives=NULL;
+    static const ImVector<char[MAX_FILENAME_BYTES]>* pUserKnownDirectoryDisplayNames=NULL;
+    static const ImVector<char[MAX_PATH_BYTES]>* pUserKnownDirectories = &Directory::GetUserKnownDirectories(&pUserKnownDirectoryDisplayNames,&pNumberKnownUserDirectoriesExceptDrives);
+    //----------------------------------------------------------
+    const ImGuiStyle& style = ImGui::GetStyle();
+    ImVec4 dummyButtonColor(0.0f,0.0f,0.0f,0.5f);     // Only the alpha is twickable from here
+    static ImVec4 ColorSet[Internal::ImGuiCol_Dialog_Size];
+    // Fill ColorSet above and fix dummyButtonColor here
+    {
+        static const ImVec4 df(0.9,0.9,0.3,1);          // directory color factor
+        static const ImVec4 ff(0.7,0.7,0.7,1);          // file color factor
+
+        for (int i=0,sz=(int)Internal::ImGuiCol_Dialog_Directory_Text;i<=sz;i++)    {
+            ImVec4& c = ColorSet[i];
+            const ImVec4& r = style.Colors[i<sz ? ((int)ImGuiCol_Button + i) : ImGuiCol_Text];
+            Internal::ColorCombine(c,r,df);
+        }
+        for (int i=(int)Internal::ImGuiCol_Dialog_File_Background,sz=(int)Internal::ImGuiCol_Dialog_File_Text;i<=sz;i++)    {
+            ImVec4& c = ColorSet[i];
+            const ImVec4& r = style.Colors[i<sz ? ((int)ImGuiCol_Button-(int)Internal::ImGuiCol_Dialog_File_Background + i) : ImGuiCol_Text];
+            Internal::ColorCombine(c,r,ff);
+        }
+        if (dummyButtonColor.w>0)   {
+            const ImVec4& bbc = style.Colors[ImGuiCol_Button];
+            dummyButtonColor.x = bbc.x;dummyButtonColor.y = bbc.y;dummyButtonColor.z = bbc.z;dummyButtonColor.w *= bbc.w;
+        }
+    }
+
+    if (I.rescan)   {
+        char validDirectory[MAX_PATH_BYTES];validDirectory[0]='\0';   // for robustness
+        if (directory && strlen(directory)>0) {
+            if (Directory::Exists(directory)) strcpy(validDirectory,directory);
+            else {
+                Path::GetDirectoryName(directory,validDirectory);
+                if (!Directory::Exists(validDirectory)) validDirectory[0]='\0';
+            }
+        }
+        Path::GetAbsolutePath(validDirectory,I.currentFolder);
+
+        I.editLocationCheckButtonPressed = false;
+        I.history.reset(); // reset history
+        I.history.switchTo(I.currentFolder);    // init history
+        I.dirs.clear();I.files.clear();I.dirNames.clear();I.fileNames.clear();I.currentSplitPath.clear();
+        strcpy(&I.newDirectoryName[0],"New Folder");
+        if (_saveFileName) {
+            //strcpy(&I.saveFileName[0],_saveFileName);
+            Path::GetFileName(_saveFileName,I.saveFileName);    // Better!
+        }
+        else I.saveFileName[0]='\0';
+        isSelectFolderDialog = _isFolderChooserDialog;
+        isSaveFileDialog = _isSaveFileDialog;
+        allowDirectoryCreation =  I.forbidDirectoryCreation ? false : (isSelectFolderDialog || isSaveFileDialog);
+        if (isSelectFolderDialog && I.sortingMode>SORT_ORDER_LAST_MODIFICATION_INVERSE) I.sortingMode = 0;
+        I.forceRescan = true;
+        I.open = true;
+        I.filter.Clear();
+        if (!windowTitle || strlen(windowTitle)==0)  {
+            if (isSelectFolderDialog)   strcpy(I.wndTitle,"Please select a folder");
+            else if (isSaveFileDialog)  strcpy(I.wndTitle,"Please choose/create a file for saving");
+            else                        strcpy(I.wndTitle,"Please choose a file");
+        }
+        else                            strcpy(I.wndTitle,windowTitle);
+        strcat(I.wndTitle,"##");
+        char tmpWndTitleNumber[12];
+        ImFormatString(tmpWndTitleNumber,11,"%d",I.uniqueNumber);
+        strcat(I.wndTitle,tmpWndTitleNumber);
+        I.wndPos = windowPos;
+        I.wndSize = windowSize;
+        if (I.wndSize.x<=0) I.wndSize.x = 400;
+        if (I.wndSize.y<=0) I.wndSize.y = 400;
+        const ImVec2 mousePos = ImGui::GetMousePos();//
+        ImGui::GetCursorPos();
+        if (I.wndPos.x<=0)  I.wndPos.x = mousePos.x - I.wndSize.x*0.5f;
+        if (I.wndPos.y<=0)  I.wndPos.y = mousePos.y - I.wndSize.y*0.5f;
+        const ImVec2 screenSize = ImGui::GetIO().DisplaySize;
+        if (I.wndPos.x>screenSize.x-I.wndSize.x) I.wndPos.x = screenSize.x-I.wndSize.x;
+        if (I.wndPos.y>screenSize.y-I.wndSize.y) I.wndPos.y = screenSize.y-I.wndSize.y;
+        if (I.wndPos.x < 0) I.wndPos.x = 0;
+        if (I.wndPos.y < 0) I.wndPos.y = 0;
+        //fprintf(stderr,"screenSize = %f,%f mousePos = %f,%f wndPos = %f,%f wndSize = %f,%f\n",screenSize.x,screenSize.y,mousePos.x,mousePos.y,wndPos.x,wndPos.y,wndSize.x,wndSize.y);
+        if (I.detectKnownDirectoriesAtEveryOpening) pUserKnownDirectories = &Directory::GetUserKnownDirectories(&pUserKnownDirectoryDisplayNames,&pNumberKnownUserDirectoriesExceptDrives,true);
+    }
+    if (!I.open) return rv;
+
+    if (I.forceRescan)    {
+        I.forceRescan = false;
+        const int sortingModeForDirectories = (I.sortingMode <= (int)SORT_ORDER_LAST_MODIFICATION_INVERSE) ? I.sortingMode : (I.sortingMode%2);
+        Directory::GetDirectories(I.currentFolder,I.dirs,&I.dirNames,(Sorting)sortingModeForDirectories);  // this is because directories don't return their size or their file extensions (so if needed we sort them alphabetically)
+        //I.dirNames.resize(I.dirs.size());for (int i=0,sz=I.dirs.size();i<sz;i++)  Path::GetFileName(I.dirs[i],(char*)I.dirNames[i]);
+
+        if (!isSelectFolderDialog)  {
+            if (!fileFilterExtensionString || strlen(fileFilterExtensionString)==0) Directory::GetFiles(I.currentFolder,I.files,&I.fileNames,(Sorting)I.sortingMode);
+            else                                        Directory::GetFiles(I.currentFolder,I.files,fileFilterExtensionString,NULL,&I.fileNames,(Sorting)I.sortingMode);
+            //I.fileNames.resize(I.files.size());for (int i=0,sz=I.files.size();i<sz;i++) Path::GetFileName(I.files[i],(char*)I.fileNames[i]);
+        }
+        else {
+            I.files.clear();I.fileNames.clear();
+            I.saveFileName[0]='\0';
+            char currentFolderName[MAX_FILENAME_BYTES];
+            Path::GetFileName(I.currentFolder,currentFolderName);
+            const size_t currentFolderNameSize = strlen(currentFolderName);
+            if (currentFolderNameSize==0 || currentFolderName[currentFolderNameSize-1]==':') strcat(currentFolderName,"/");
+            strcat(I.saveFileName,currentFolderName);
+        }
+
+        I.history.getCurrentSplitPath(I.currentSplitPath);
+
+        const static int approxNumEntriesPerColumn = 20;//(int) (20.f / browseSectionFontScale);// tweakable
+        I.totalNumBrowsingEntries = (int)(I.dirs.size()+I.files.size());
+        I.numBrowsingColumns = I.totalNumBrowsingEntries/approxNumEntriesPerColumn;
+        if (I.numBrowsingColumns<=0) I.numBrowsingColumns = 1;
+        if (I.totalNumBrowsingEntries%approxNumEntriesPerColumn>(approxNumEntriesPerColumn/2)) ++I.numBrowsingColumns;
+        if (I.numBrowsingColumns>6) I.numBrowsingColumns = 6;
+        I.numBrowsingEntriesPerColumn = I.totalNumBrowsingEntries/I.numBrowsingColumns;
+        if (I.totalNumBrowsingEntries%I.numBrowsingColumns!=0) ++I.numBrowsingEntriesPerColumn;
+
+        //#       define DEBUG_HISTORY
+#       ifdef DEBUG_HISTORY
+        if (I.history.getInfoSize()>0) fprintf(stderr,"\nHISTORY: currentFolder:\"%s\" history.canGoBack=%s history.canGoForward=%s currentHistory:\n",I.currentFolder,I.history.canGoBack()?"true":"false",I.history.canGoForward()?"true":"false");
+        if (I.history.getCurrentFolderInfo()) I.history.getCurrentFolderInfo()->display();
+#       endif //DEBUG_HISTORY
+    }
+
+    if (I.rescan) {
+        I.rescan = false; // Mandatory
+
+        ImGui::Begin(I.wndTitle, &I.open, I.wndSize,windowAlpha);
+        ImGui::SetWindowPos(I.wndPos);
+        ImGui::SetWindowSize(I.wndSize);
+        //fprintf(stderr,"\"%s\" wndPos={%1.2f,%1.2f}\n",wndTitle.c_str(),wndPos.x,wndPos.y);
+    }
+    else ImGui::Begin(I.wndTitle, &I.open,ImVec2(0,0),windowAlpha);
+    ImGui::Separator();
+
+    //------------------------------------------------------------------------------------
+    // History (=buttons: < and >)
+    {
+        bool historyBackClicked = false;
+        bool historyForwardClicked = false;
+
+        // history -----------------------------------------------
+        ImGui::PushID("historyDirectoriesID");
+
+        const bool historyCanGoBack = I.history.canGoBack();
+        const bool historyCanGoForward = I.history.canGoForward();
+
+        if (!historyCanGoBack) {
+            ImGui::PushStyleColor(ImGuiCol_Button,dummyButtonColor);
+            ImGui::PushStyleColor(ImGuiCol_ButtonHovered,dummyButtonColor);
+            ImGui::PushStyleColor(ImGuiCol_ButtonActive,dummyButtonColor);
+        }
+        historyBackClicked = ImGui::Button("<")&historyCanGoBack;
+        ImGui::SameLine();
+        if (!historyCanGoBack) {
+            ImGui::PopStyleColor();
+            ImGui::PopStyleColor();
+            ImGui::PopStyleColor();
+        }
+
+        if (!historyCanGoForward) {
+            ImGui::PushStyleColor(ImGuiCol_Button,dummyButtonColor);
+            ImGui::PushStyleColor(ImGuiCol_ButtonHovered,dummyButtonColor);
+            ImGui::PushStyleColor(ImGuiCol_ButtonActive,dummyButtonColor);
+        }
+        historyForwardClicked = ImGui::Button(">")&historyCanGoForward;
+        ImGui::SameLine();
+        if (!historyCanGoForward) {
+            ImGui::PopStyleColor();
+            ImGui::PopStyleColor();
+            ImGui::PopStyleColor();
+        }
+
+        ImGui::PopID();
+        // -------------------------------------------------------
+
+        if (historyBackClicked || historyForwardClicked)    {
+            ImGui::End();
+
+            if (historyBackClicked)         I.history.goBack();
+            else if (historyForwardClicked) I.history.goForward();
+
+            I.forceRescan = true;
+
+            strcpy(I.currentFolder,I.history.getCurrentFolder());
+            strcpy(I.editLocationInputText,I.currentFolder);
+
+#       ifdef DEBUG_HISTORY
+            if (historyBackClicked) fprintf(stderr,"\nPressed BACK to\t");
+            else fprintf(stderr,"\nPressed FORWARD to\t");
+            fprintf(stderr,"\"%s\" (%d)\n",I.currentFolder,(int)*I.history.getCurrentSplitPathIndex());
+#       undef DEBUG_HISTOTY
+#       endif //DEBUG_HISTORY
+            return rv;
+        }
+    }
+    //------------------------------------------------------------------------------------
+    // Edit Location CheckButton
+    bool editLocationInputTextReturnPressed = false;
+    {
+
+        bool mustValidateInputPath = false;
+        ImGui::PushStyleColor(ImGuiCol_Button,I.editLocationCheckButtonPressed ? dummyButtonColor : style.Colors[ImGuiCol_Button]);
+
+        if (ImGui::Button("L##EditLocationCheckButton"))    {
+            I.editLocationCheckButtonPressed = !I.editLocationCheckButtonPressed;
+            if (I.editLocationCheckButtonPressed) {
+                strcpy(I.editLocationInputText,I.currentFolder);
+                ImGui::SetKeyboardFocusHere();
+            }
+            //if (!I.editLocationCheckButtonPressed) mustValidateInputPath = true;   // or not ? I mean: the user wants to quit or to validate in this case ?
+        }
+
+        ImGui::PopStyleColor();
+
+        if (I.editLocationCheckButtonPressed) {
+            ImGui::SameLine();
+            editLocationInputTextReturnPressed = ImGui::InputText("##EditLocationInputText",I.editLocationInputText,MAX_PATH_BYTES,ImGuiInputTextFlags_AutoSelectAll|ImGuiInputTextFlags_EnterReturnsTrue);
+            if (editLocationInputTextReturnPressed)  mustValidateInputPath = true;
+            else ImGui::Separator();
+        }
+
+        if (mustValidateInputPath)  {
+            // it's better to clean the input path here from trailing slashes:
+            char cleanEnteredPath[MAX_PATH_BYTES];
+            strcpy(cleanEnteredPath,I.editLocationInputText);
+            size_t len = strlen(cleanEnteredPath);
+            while (len>0 && (cleanEnteredPath[len-1]=='/' || cleanEnteredPath[len-1]=='\\')) {cleanEnteredPath[len-1]='\0';len = strlen(cleanEnteredPath);}
+
+            if (len==0 || strcmp(I.currentFolder,cleanEnteredPath)==0)    I.editLocationCheckButtonPressed = false;
+            else if (Directory::Exists(cleanEnteredPath))   {
+                I.editLocationCheckButtonPressed = false; // Optional (return to split-path buttons)
+                //----------------------------------------------------------------------------------
+                I.history.switchTo(cleanEnteredPath);
+                strcpy(I.currentFolder,cleanEnteredPath);
+                I.forceRescan = true;
+
+            }
+            //else fprintf(stderr,"mustValidateInputPath NOOP: \"%s\" \"%s\"\n",I.currentFolder,cleanEnteredPath);
+        }
+        else ImGui::SameLine();
+
+    }
+    //------------------------------------------------------------------------------------
+    // Split Path control
+    if (!I.editLocationCheckButtonPressed && !editLocationInputTextReturnPressed) {
+        bool mustSwitchSplitPath = false;
+        const FolderInfo& fi = *I.history.getCurrentFolderInfo();
+
+        ImVec2& framePadding = ImGui::GetStyle().FramePadding;
+        const float originalFramePaddingX = framePadding.x;
+        framePadding.x = 0;
+
+        // Split Path
+        // Tab:
+        {
+            //-----------------------------------------------------
+            // TAB LABELS
+            //-----------------------------------------------------
+            {
+                const int numTabs=(int) I.currentSplitPath.size();
+                int newSelectedTab = fi.splitPathIndex;
+                for (int t=0;t<numTabs;t++)	{
+                    if (t>0) ImGui::SameLine(0,0);
+                    if (t==fi.splitPathIndex) {
+                        ImGui::PushStyleColor(ImGuiCol_Button,dummyButtonColor);
+                        ImGui::PushStyleColor(ImGuiCol_ButtonHovered,dummyButtonColor);
+                        ImGui::PushStyleColor(ImGuiCol_ButtonActive,dummyButtonColor);
+                    }
+                    ImGui::PushID(&I.currentSplitPath[t]);
+                    const bool pressed = ImGui::Button(I.currentSplitPath[t]);
+                    ImGui::PopID();
+                    if (pressed) {
+                        if (fi.splitPathIndex!=t && !mustSwitchSplitPath) mustSwitchSplitPath = true;
+                        newSelectedTab = t;
+                    }
+                    if (t==fi.splitPathIndex) {
+                        ImGui::PopStyleColor();
+                        ImGui::PopStyleColor();
+                        ImGui::PopStyleColor();
+                    }
+                }
+                if (mustSwitchSplitPath) {
+                    FolderInfo mfi;
+                    fi.getFolderInfoForSplitPathIndex(newSelectedTab,mfi);
+                    I.history.switchTo(mfi);
+                    I.forceRescan = true;
+                    strcpy(I.currentFolder,I.history.getCurrentFolder());
+                    strcpy(I.editLocationInputText,I.currentFolder);
+                    //fprintf(stderr,"%s\n",I.currentFolder);
+                }
+            }
+        }
+
+        framePadding.x = originalFramePaddingX;
+    }
+    //------------------------------------------------------------------------------------
+
+    // Start collapsable regions----------------------------------------------------------
+    // User Known directories-------------------------------------------------------------
+    if (I.allowKnownDirectoriesSection && pUserKnownDirectories->size()>0)  {
+        ImGui::Separator();
+
+        if (ImGui::CollapsingHeader("Known Directories##UserKnownDirectories"))  {
+            static int id;
+            ImGui::PushID(&id);
+
+            ImGui::PushStyleColor(ImGuiCol_Text,ColorSet[Internal::ImGuiCol_Dialog_Directory_Text]);
+            ImGui::PushStyleColor(ImGuiCol_Button,ColorSet[Internal::ImGuiCol_Dialog_Directory_Background]);
+            ImGui::PushStyleColor(ImGuiCol_ButtonHovered,ColorSet[Internal::ImGuiCol_Dialog_Directory_Hover]);
+            ImGui::PushStyleColor(ImGuiCol_ButtonActive,ColorSet[Internal::ImGuiCol_Dialog_Directory_Pressed]);
+
+            for (int i=0,sz=(int)pUserKnownDirectories->size();i<sz;i++)  {
+                const char* userKnownFolder = (*pUserKnownDirectories)[i];
+                const char* userKnownFolderDisplayName = (*pUserKnownDirectoryDisplayNames)[i];
+                if (ImGui::SmallButton(userKnownFolderDisplayName) && strcmp(userKnownFolder,I.currentFolder)!=0) {
+                    strcpy(I.currentFolder,userKnownFolder);
+                    strcpy(I.editLocationInputText,I.currentFolder);
+                    I.history.switchTo(I.currentFolder);
+                    I.forceRescan = true;
+                    //------------------------------------------------------------------------------------------------------------------------------
+                }
+                if (i!=sz-1 && (i>=*pNumberKnownUserDirectoriesExceptDrives || i%7!=6)) ImGui::SameLine();
+            }
+
+            ImGui::PopStyleColor();
+            ImGui::PopStyleColor();
+            ImGui::PopStyleColor();
+            ImGui::PopStyleColor();
+
+            ImGui::PopID();
+        }
+
+    }
+    // End User Known directories---------------------------------------------------------
+    // Allow directory creation ----------------------------------------------------------
+    if (allowDirectoryCreation) {
+        ImGui::Separator();
+        bool mustCreate = false;
+
+        if (ImGui::CollapsingHeader("New Directory##allowDirectoryCreation"))  {
+            static int id;
+            ImGui::PushID(&id);
+
+            ImGui::InputText("##createNewFolderName",&I.newDirectoryName[0],MAX_FILENAME_BYTES);
+            ImGui::SameLine();
+            mustCreate = ImGui::Button("CREATE");
+
+            ImGui::PopID();
+        }
+
+        if (mustCreate && strlen(I.newDirectoryName)>0)    {
+            char newDirPath[MAX_PATH_BYTES];
+            Path::Combine(I.currentFolder,I.newDirectoryName,newDirPath,false);
+            if (!Directory::Exists(newDirPath)) {
+                //#           define SIMULATING_ONLY
+#           ifdef SIMULATING_ONLY
+                fprintf(stderr,"creating: \"%s\"\n",newDirPath);
+#           undef SIMULATING_ONLY
+#           else //SIMULATING_ONLY
+                Directory::Create(newDirPath);
+                if (!Directory::Exists(newDirPath)) fprintf(stderr,"Error creating new folder: \"%s\"\n",newDirPath);
+                else I.forceRescan = true;   // Just update
+#           endif //SIMULATING_ONLY
+            }
+        }
+    }
+    // End allow directory creation ------------------------------------------------------
+    // Filtering entries -----------------------------------------------------------------
+    if (I.allowFiltering)  {
+        ImGui::Separator();
+        if (ImGui::CollapsingHeader("Filtering##fileNameFiltering"))  {
+            static int id;
+            ImGui::PushID(&id);
+            I.filter.Draw();
+            ImGui::PopID();
+        }
+
+    }
+    // End filtering entries -------------------------------------------------------------
+    // End collapsable regions------------------------------------------------------------
+
+    // Selection field -------------------------------------------------------------------
+    if (isSaveFileDialog || isSelectFolderDialog)   {
+        ImGui::Separator();
+        bool selectionButtonPressed = false;
+
+        static int id;
+        ImGui::PushID(&id);
+        if (isSaveFileDialog)   {
+            ImGui::AlignFirstTextHeightToWidgets();
+            ImGui::Text("File:");ImGui::SameLine();
+            ImGui::InputText("##saveFileName",&I.saveFileName[0],MAX_FILENAME_BYTES);
+            ImGui::SameLine();
+        }
+        else {
+            ImGui::AlignFirstTextHeightToWidgets();
+            ImGui::Text("Folder:");ImGui::SameLine();
+
+            static const ImVec4 sf(1.0,0.8,0.5,1);      // delected folder color factor
+            ImVec4& c = ColorSet[Internal::ImGuiCol_Dialog_SelectedFolder_Text];
+            const ImVec4& r = style.Colors[ImGuiCol_Text];
+            Internal::ColorCombine(c,r,sf);
+
+            ImGui::TextColored(ColorSet[Internal::ImGuiCol_Dialog_SelectedFolder_Text],"%s",&I.saveFileName[0],MAX_FILENAME_BYTES);
+            ImGui::SameLine();
+        }
+
+        if (isSelectFolderDialog)  selectionButtonPressed = ImGui::Button("Select");
+        else selectionButtonPressed = ImGui::Button("Save");
+
+        ImGui::PopID();
+
+        if (selectionButtonPressed) {
+            if (isSelectFolderDialog) {
+                strcpy(rv,I.currentFolder);
+                I.open = true;
+            }
+            else if (isSaveFileDialog)  {
+                if (strlen(I.saveFileName)>0)  {
+                    bool pathOk = true;
+                    if (I.mustFilterSaveFilePathWithFileFilterExtensionString && fileFilterExtensionString && strlen(fileFilterExtensionString)>0)    {
+                        pathOk = false;
+                        char saveFileNameExtension[MAX_FILENAME_BYTES];Path::GetExtension(I.saveFileName,saveFileNameExtension);
+                        const bool saveFileNameHasExtension = strlen(saveFileNameExtension)>0;
+                        //-------------------------------------------------------------------
+                        ImVector<char[MAX_FILENAME_BYTES]> wExts;String::Split(fileFilterExtensionString,wExts,';');
+                        const size_t wExtsSize = wExts.size();
+                        if (!saveFileNameHasExtension)   {
+                            if (wExtsSize==0) pathOk = true;    // Bad situation, better allow this case
+                            else strcat(I.saveFileName,wExts[0]);
+                        }
+                        else    {
+                            // saveFileNameHasExtension
+                            for (size_t i = 0;i<wExtsSize;i++)	{
+                                const char* ext = wExts[i];
+                                if (strcmp(ext,saveFileNameExtension)==0)   {
+                                    pathOk = true;
+                                    break;
+                                }
+                            }
+                            if (!pathOk && wExtsSize>0) strcat(I.saveFileName,wExts[0]);
+                        }
+                    }
+                    if (pathOk) {
+                        char savePath[MAX_PATH_BYTES];
+                        Path::Combine(I.currentFolder,I.saveFileName,savePath,false);
+                        strcpy(rv,savePath);
+                        I.open = true;
+                    }
+                }
+            }
+        }
+
+        //ImGui::Spacing();
+    }
+    // End selection field----------------------------------------------------------------
+
+    ImGui::Separator();
+    // sorting --------------------------------------------------------------------
+    ImGui::Text("Sorting by: ");ImGui::SameLine();
+    {
+        const int oldSortingMode = I.sortingMode;
+        const int oldSelectedTab = I.sortingMode/2;
+        //-----------------------------------------------------
+        // TAB LABELS
+        //-----------------------------------------------------
+        {
+            static const int numTabs=(int)SORT_ORDER_COUNT/2;
+            int newSortingMode = oldSortingMode;
+            static const char* names[numTabs] = {"Name","Modified","Size","Type"};
+            const int numUsedTabs = isSelectFolderDialog ? 2 : numTabs;
+            for (int t=0;t<numUsedTabs;t++)	{
+                if (t>0) ImGui::SameLine();
+                if (t==oldSelectedTab) {
+                    ImGui::PushStyleColor(ImGuiCol_Button,dummyButtonColor);
+                }
+                ImGui::PushID(&names[t]);
+                const bool pressed = ImGui::SmallButton(names[t]);
+                ImGui::PopID();
+                if (pressed) {
+                    if (oldSelectedTab==t) {
+                        newSortingMode = oldSortingMode;
+                        if (newSortingMode%2==0) ++newSortingMode;// 0,2,4
+                        else --newSortingMode;
+                    }
+                    else newSortingMode = t*2;
+                }
+                if (t==oldSelectedTab) {
+                    ImGui::PopStyleColor();
+                }
+            }
+
+            if (newSortingMode!=oldSortingMode) {
+                I.sortingMode = newSortingMode;
+                //printf("sortingMode = %d\n",sortingMode);
+                I.forceRescan = true;
+            }
+
+            //-- Browsing per row -----------------------------------
+            if (I.allowDisplayByOption && I.numBrowsingColumns>1)   {
+                ImGui::SameLine();
+                ImGui::Text("   Display by:");
+                ImGui::SameLine();
+                ImGui::PushStyleColor(ImGuiCol_Button,dummyButtonColor);
+                if (ImGui::SmallButton(!Internal::BrowsingPerRow ? "Column##browsingPerRow" : "Row##browsingPerRow"))   {
+                    Internal::BrowsingPerRow = !Internal::BrowsingPerRow;
+                }
+                ImGui::PopStyleColor();
+            }
+            //-- End browsing per row -------------------------------
+        }
+    }
+    //-----------------------------------------------------------------------------
+    ImGui::Separator();
+
+    //-----------------------------------------------------------------------------
+    // MAIN BROWSING FRAME:
+    //-----------------------------------------------------------------------------
+    {
+        ImGui::BeginChild("BrowsingFrame");
+        // ImGui::SetScrollPosHere();   // possible future ref: while drawing to place the scroll bar
+        ImGui::Columns(I.numBrowsingColumns);
+
+        static int id;
+        ImGui::PushID(&id);
+        int cntEntries = 0;
+        // Directories --------------------------------------------------------------
+        if (I.dirs.size()>0)   {
+            ImGui::PushStyleColor(ImGuiCol_Text,ColorSet[Internal::ImGuiCol_Dialog_Directory_Text]);
+            ImGui::PushStyleColor(ImGuiCol_Button,ColorSet[Internal::ImGuiCol_Dialog_Directory_Background]);
+            ImGui::PushStyleColor(ImGuiCol_ButtonHovered,ColorSet[Internal::ImGuiCol_Dialog_Directory_Hover]);
+            ImGui::PushStyleColor(ImGuiCol_ButtonActive,ColorSet[Internal::ImGuiCol_Dialog_Directory_Pressed]);
+
+            for (int i=0,sz=(int)I.dirs.size();i<sz;i++) {
+                const char* dirName = &I.dirNames[i][0];
+                if (I.filter.PassFilter(dirName)) {
+                    if (ImGui::SmallButton(dirName)) {
+                        strcpy(I.currentFolder,I.dirs[i]);
+                        strcpy(I.editLocationInputText,I.currentFolder);
+                        I.history.switchTo(I.currentFolder);
+                        I.forceRescan = true;
+                        //------------------------------------------------------------------------------------------------------------------------------
+                    }
+                    ++cntEntries;
+                    if (Internal::BrowsingPerRow) ImGui::NextColumn();
+                    else if (cntEntries==I.numBrowsingEntriesPerColumn) {
+                        cntEntries = 0;
+                        ImGui::NextColumn();
+                    }
+                }
+            }
+
+            ImGui::PopStyleColor();
+            ImGui::PopStyleColor();
+            ImGui::PopStyleColor();
+            ImGui::PopStyleColor();
+        }
+        // Files ----------------------------------------------------------------------
+        if (!isSelectFolderDialog && I.files.size()>0)   {
+            ImGui::PushStyleColor(ImGuiCol_Text,ColorSet[Internal::ImGuiCol_Dialog_File_Text]);
+            ImGui::PushStyleColor(ImGuiCol_Button,ColorSet[Internal::ImGuiCol_Dialog_File_Background]);
+            ImGui::PushStyleColor(ImGuiCol_ButtonHovered,ColorSet[Internal::ImGuiCol_Dialog_File_Hover]);
+            ImGui::PushStyleColor(ImGuiCol_ButtonActive,ColorSet[Internal::ImGuiCol_Dialog_File_Pressed]);
+
+
+            for (int i=0,sz=(int)I.files.size();i<sz;i++) {
+                const char* fileName = &I.fileNames[i][0];
+                if (I.filter.PassFilter(fileName)) {
+                    if (ImGui::SmallButton(fileName)) {
+                        if (!isSaveFileDialog)  {
+                            strcpy(rv,I.files[i]);
+                            I.open = true;
+                        }
+                        else {
+                            Path::GetFileName(I.files[i],I.saveFileName);
+                        }
+                    }
+                    ++cntEntries;
+                    if (Internal::BrowsingPerRow) ImGui::NextColumn();
+                    else if (cntEntries==I.numBrowsingEntriesPerColumn) {
+                        cntEntries = 0;
+                        ImGui::NextColumn();
+                    }
+                }
+            }
+
+            ImGui::PopStyleColor();
+            ImGui::PopStyleColor();
+            ImGui::PopStyleColor();
+            ImGui::PopStyleColor();
+        }
+        //-----------------------------------------------------------------------------
+        ImGui::PopID();
+        ImGui::EndChild();
+
+    }
+    //-----------------------------------------------------------------------------
+
+    ImGui::End();
+    return rv;
+}
+
+const char* Dialog::chooseFileDialog(bool dialogTriggerButton,const char* directory,const char* fileFilterExtensionString,const char* windowTitle,const ImVec2& windowSize,const ImVec2& windowPos,const float windowAlpha) {
+    if (dialogTriggerButton) {internal->rescan = true;internal->chosenPath[0]='\0';}
+    if (dialogTriggerButton || (!internal->rescan && strlen(getChosenPath())==0)) {
+        ChooseFileMainMethod(*this,directory,false,false,"",fileFilterExtensionString,windowTitle,windowSize,windowPos,windowAlpha);
+    }
+    return getChosenPath();
+}
+const char* Dialog::chooseFolderDialog(bool dialogTriggerButton,const char* directory,const char* windowTitle,const ImVec2& windowSize,const ImVec2& windowPos,const float windowAlpha)  {
+    if (dialogTriggerButton) {internal->rescan = true;internal->chosenPath[0]='\0';}
+    if (dialogTriggerButton || (!internal->rescan && strlen(getChosenPath())==0)) {
+        ChooseFileMainMethod(*this,directory,true,false,"","",windowTitle,windowSize,windowPos,windowAlpha);
+    }
+    return getChosenPath();
+}
+const char* Dialog::saveFileDialog(bool dialogTriggerButton,const char* directory,const char* startingFileNameEntry,const char* fileFilterExtensionString,const char* windowTitle,const ImVec2& windowSize,const ImVec2& windowPos,const float windowAlpha)    {
+    if (dialogTriggerButton) {internal->rescan = true;internal->chosenPath[0]='\0';}
+    if (dialogTriggerButton || (!internal->rescan && strlen(getChosenPath())==0)) {
+        ChooseFileMainMethod(*this,directory,false,true,startingFileNameEntry,fileFilterExtensionString,windowTitle,windowSize,windowPos,windowAlpha);
+    }
+    return getChosenPath();
+}
+
+} // namespace ImGuiFs
diff --git a/src/deps/imguifilesystem/imguifilesystem.h b/src/deps/imguifilesystem/imguifilesystem.h
new file mode 100644
index 00000000..009758de
--- /dev/null
+++ b/src/deps/imguifilesystem/imguifilesystem.h
@@ -0,0 +1,95 @@
+// This software is provided 'as-is', without any express or implied
+// warranty.  In no event will the authors be held liable for any damages
+// arising from the use of this software.
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+// 1. The origin of this software must not be misrepresented; you must not
+//    claim that you wrote the original software. If you use this software
+//    in a product, an acknowledgment in the product documentation would be
+//    appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+//    misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+
+#ifndef IMGUI_FILESYSTEM_H_
+#define IMGUI_FILESYSTEM_H_
+
+// USAGE EXAMPLE:
+/*
+#include "imguifilesystem.h"                            // imguifilesystem.cpp must be compiled
+
+// Inside a ImGui window:
+const bool browseButtonPressed = ImGui::Button("...");  // we need a trigger boolean variable
+static ImGuiFs::Dialog dlg;                             // one per dialog (and must be static)
+dlg.chooseFileDialog(browseButtonPressed);              // see other dialog types and the full list of arguments for advanced usage
+if (strlen(dlg.getChosenPath())>0) {
+    ImGui::Text("Chosen file: \"%s\"",dlg.getChosenPath());
+}
+
+// If you want to copy the (valid) returned path somewhere, you can use something like:
+static char myPath[ImGuiFs::MAX_PATH_BYTES];
+if (strlen(dlg.getChosenPath())>0) {
+    strcpy(myPath,dlg.getChosenPath());
+}
+*/
+
+// MISSING FEATURES:
+/*
+-> [File and Folder] Links are NOT supported (they don't show up).
+-> Multiselections in chooseFileDialogs are NOT supported.
+-> Hidden and temporary files don't show up on nix systems (by design). Nothing has been done for Windows about it yet.
+*/
+
+// COMPILING AND TESTING:
+/*
+-> Compiled and tested using "ImGui library v1.17 wip"
+
+-> Successfully compiled using gcc, clang and mingw32 compilers.
+x> Never compiled on any other compiler (Visual C++'s cl.exe included).
+
+-> Tested on Ubuntu 64bit and Wine 32bit.
+x> Never tested on a real Windows OS and on MacOS.
+*/
+
+//#define DIRENT_USES_UTF8_CHARS  // Optional. Affects Windows users only. Needs recompilation of imguifilesystem.cpp. Enables long UTF8 paths instead of short ASCII paths.
+                                // Unfortunately it's NOT 100% functional (in my tests some folders can't be browsed). Patches are welcome. See "dirent_portable.h" for further info.
+                                // When experiencing problems on Windows, trying commenting this definition out is a good start.
+                                // On a second thought, I think we should leave this definition commented out (Windows users can always define it at the project level, if needed).
+
+namespace ImGuiFs {
+
+
+extern const int MAX_FILENAME_BYTES;
+extern const int MAX_PATH_BYTES;
+
+
+struct Dialog {
+    public:
+
+    // default arguments are usually what most users expect (better not touch them in most cases)
+    Dialog(bool noKnownDirectoriesSection=false,bool noCreateDirectorySection=false,bool noFilteringSection=false,bool detectKnownDirectoriesAtEachOpening=false,bool addDisplayByOption=false,bool dontFilterSaveFilePathsEnteredByTheUser=false);
+    ~Dialog();
+
+    // "dialogTriggerButton" is usually a bool variable connected to a ImGui::Button(...).
+    // returns the chosen path (internally stored). Users can check when the returned path has strlen()>0.
+    // "fileFilterExtensionString" can be something like ".png;.jpg;.jpeg;.bmp;.tga;.gif;.tiff;.txt". It's case insensitive.
+    // "directory" and "startingFileNameEntry" (only available in saveFileDialog(...)) are quite flexible and can be set to almost everything: the method will use the most resonable choice.
+    const char* chooseFileDialog(bool dialogTriggerButton,const char* directory=NULL,const char* fileFilterExtensionString=NULL,const char* windowTitle=NULL,const ImVec2& windowSize=ImVec2(-1,-1),const ImVec2& windowPos=ImVec2(-1,-1),const float windowAlpha=0.875f);
+    const char* chooseFolderDialog(bool dialogTriggerButton,const char* directory=NULL,const char* windowTitle=NULL,const ImVec2& windowSize=ImVec2(-1,-1),const ImVec2& windowPos=ImVec2(-1,-1),const float windowAlpha=0.875f);
+    const char* saveFileDialog(bool dialogTriggerButton,const char* directory=NULL,const char* startingFileNameEntry=NULL,const char* fileFilterExtensionString=NULL,const char* windowTitle=NULL,const ImVec2& windowSize=ImVec2(-1,-1),const ImVec2& windowPos=ImVec2(-1,-1),const float windowAlpha=0.875f);
+
+    // gets the chosen path (internally stored). It's valid (its strlen()>0) only when the user performs a valid selection.
+    const char* getChosenPath() const;
+    // returns the last directory browsed by the user using this class (internally stored). Can be passed as "directory" parameter in the methods above to reuse last used directory.
+    const char* getLastDirectory() const;
+
+    private:
+    struct Internal* internal;
+    friend const char* ChooseFileMainMethod(Dialog& ist,const char* directory,const bool _isFolderChooserDialog,const bool _isSaveFileDialog,const char* _saveFileName,const char* fileFilterExtensionString,const char* windowTitle,const ImVec2& windowSize,const ImVec2& windowPos,const float windowAlpha);
+};
+
+
+} // namespace ImGuiFs
+
+#endif //IMGUI_FILESYSTEM_H_
diff --git a/src/loader/LoaderTR2.cpp b/src/loader/LoaderTR2.cpp
index 37cf89bb..c85685e2 100644
--- a/src/loader/LoaderTR2.cpp
+++ b/src/loader/LoaderTR2.cpp
@@ -931,20 +931,20 @@ void LoaderTR2::loadMoveables() {
         /*
         if (animation == 0xFFFF) {
         */
-            // Just add the frame indicated in frameOffset, nothing else
-            char* tmp = reinterpret_cast<char*>(&frames[0]) + frameOffset;
-            BinaryMemory frame(tmp, (numFrames * 2) - frameOffset);
+        // Just add the frame indicated in frameOffset, nothing else
+        char* tmp = reinterpret_cast<char*>(&frames[0]) + frameOffset;
+        BinaryMemory frame(tmp, (numFrames * 2) - frameOffset);
 
-            if (((numFrames * 2) - frameOffset) <= 0)
-                continue; // TR1/LEVEL3A crashes without this?!
+        if (((numFrames * 2) - frameOffset) <= 0)
+            continue; // TR1/LEVEL3A crashes without this?!
 
-            BoneFrame* bf = loadFrame(frame, numMeshes, startingMesh, meshTree, numMeshTrees, meshTrees);
-            AnimationFrame* af = new AnimationFrame(0);
-            af->add(bf);
+        BoneFrame* bf = loadFrame(frame, numMeshes, startingMesh, meshTree, numMeshTrees, meshTrees);
+        AnimationFrame* af = new AnimationFrame(0);
+        af->add(bf);
 
-            SkeletalModel* sm = new SkeletalModel(objectID);
-            sm->add(af);
-            getWorld().addSkeletalModel(sm);
+        SkeletalModel* sm = new SkeletalModel(objectID);
+        sm->add(af);
+        getWorld().addSkeletalModel(sm);
         /*
         } else {
             // TODO Add the whole animation hierarchy
diff --git a/src/main.cpp b/src/main.cpp
index 38c405c7..dc32c7e8 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -11,7 +11,7 @@
 #include "global.h"
 #include "Camera.h"
 #include "Log.h"
-#include "MenuFolder.h"
+#include "Menu.h"
 #include "Render.h"
 #include "RunTime.h"
 #include "SoundManager.h"
@@ -27,14 +27,8 @@
 #include "utils/time.h"
 
 static std::string configFileToUse;
-
-static std::shared_ptr<MenuFolder> gMenu;
 static std::shared_ptr<World> gWorld;
 
-Menu& getMenu() {
-    return *gMenu;
-}
-
 World& getWorld() {
     return *gWorld;
 }
@@ -52,7 +46,6 @@ int main(int argc, char* argv[]) {
     // RunTime is required by other constructors
     RunTime::initialize();
 
-    gMenu.reset(new MenuFolder());
     gWorld.reset(new World());
 
     Command::fillCommandList();
@@ -106,23 +99,23 @@ int main(int argc, char* argv[]) {
         return -5;
     }
 
-    // Initialize Menu
-    error = getMenu().initialize();
+    // Initialize Debug UI
+    error = UI::initialize();
     if (error != 0) {
-        std::cout << "Could not initialize Menu (" << error << ")!" << std::endl;
+        std::cout << "Could not initialize Debug UI (" << error << ")!" << std::endl;
         return -6;
     }
 
-    // Initialize Debug UI
-    error = UI::initialize();
+    // Initialize Menu
+    error = Menu::initialize();
     if (error != 0) {
-        std::cout << "Could not initialize Debug UI (" << error << ")!" << std::endl;
+        std::cout << "Could not initialize Menu (" << error << ")!" << std::endl;
         return -7;
     }
 
     Log::get(LOG_INFO) << "Starting " << VERSION << Log::endl;
     Camera::setSize(Window::getSize());
-    getMenu().setVisible(true);
+    Menu::setVisible(true);
     systemTimerReset();
     RunTime::setRunning(true);
     Render::setMode(RenderMode::LoadScreen);
@@ -132,6 +125,7 @@ int main(int argc, char* argv[]) {
         renderFrame();
     }
 
+    Menu::shutdown();
     UI::shutdown();
     Font::shutdown();
     Sound::shutdown();
@@ -152,7 +146,6 @@ int main(int argc, char* argv[]) {
 
 void renderFrame() {
     Render::display();
-    getMenu().display();
     UI::display();
     Window::swapBuffers();
     RunTime::updateFPS();
diff --git a/src/utils/strings.cpp b/src/utils/strings.cpp
index 97110809..74e0e82b 100644
--- a/src/utils/strings.cpp
+++ b/src/utils/strings.cpp
@@ -43,3 +43,33 @@ bool stringEndsWith(std::string s, std::string suffix, bool casesensitive) {
     return false;
 }
 
+std::string removeLastPathElement(std::string s) {
+    auto pos = s.find_last_of("/\\");
+    if (pos == std::string::npos)
+        return s;
+    return s.erase(pos);
+}
+
+std::string getLastPathElement(std::string s) {
+    auto pos = s.find_last_of("/\\");
+    if (pos == std::string::npos)
+        return s;
+    return s.erase(0, pos + 1);
+}
+
+std::string convertPathDelimiter(std::string s) {
+    std::string::size_type pos;
+
+#ifdef _WIN32
+    while ((pos = s.find('/')) != std::string::npos) {
+        s.replace(pos, 1, 1, '\\');
+    }
+#else
+    while ((pos = s.find('\\')) != std::string::npos) {
+        s.replace(pos, 1, 1, '/');
+    }
+#endif
+
+    return s;
+}
+