Migrate to Qt6 (v6.8.0)

.github/workflows/linux.yml

@@ -21,10 +21,11 @@ jobs:
       - name: Install Qt
         uses: jurplel/install-qt-action@v3
         with:
-          version: '5.15.2'
+          aqtversion: "==3.1.*"
+          version: "6.8.0"
           host: linux
           target: desktop
-          arch: gcc_64
+          arch: linux_gcc_64
 
       - name: Configure CMake
         run: cmake --preset linux

.github/workflows/macos.yml

@@ -21,13 +21,14 @@ jobs:
       - name: Install Qt
         uses: jurplel/install-qt-action@v3
         with:
-          version: '5.15.2'
+          aqtversion: "==3.1.*"
+          version: "6.8.0"
           host: mac
           target: desktop
           arch: clang_64
 
       - name: Configure CMake
-        run: cmake --preset macos -DCMAKE_XCODE_ATTRIBUTE_CODE_SIGNING_REQUIRED=OFF -DCMAKE_XCODE_ATTRIBUTE_CODE_SIGN_IDENTITY="" -DCMAKE_XCODE_ATTRIBUTE_CODE_SIGN_STYLE="Manual"
+        run: cmake --preset macos
 
       - name: Build the library.
         run: cmake --build --preset macos

.github/workflows/windows.yml

@@ -21,10 +21,11 @@ jobs:
       - name: Install Qt
         uses: jurplel/install-qt-action@v3
         with:
-          version: '5.15.2'
+          aqtversion: "==3.1.*"
+          version: "6.8.0"
           host: windows
           target: desktop
-          arch: win64_msvc2019_64
+          arch: win64_msvc2022_64
 
       - name: Configure CMake
         run: cmake --preset windows

CMakeLists.txt

@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.21.0)
 
 # Custom CMake modules.
-list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+# list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 
 # Enable parallel build (not enabled by default on Windows).
 set(CMAKE_BUILD_PARALLEL_LEVEL $ENV{NUMBER_OF_PROCESSORS})
@@ -15,16 +15,6 @@ project("qlementine"
 set(PROJECT_COPYRIGHT "© Olivier Cléro, MIT License.")
 set(PROJECT_NAMESPACE "oclero")
 
-# Temporary hack to make it work with Qt6 <6.4.2 && >6.4.2
-# With Qt5, it was "path/to/Qt/6.7.0/msvc2019_64/lib/cmake/Qt6",
-# but with Qt6, it is now "path/to/Qt/6.7.0/msvc2019_64".
-if(WIN32)
-  string(FIND "${CMAKE_PREFIX_PATH}" "/lib/cmake/Qt6" USING_Qt6_INDEX)
-  if(NOT ${USING_Qt6_INDEX} EQUAL -1)
-    string(REPLACE "/lib/cmake/Qt6" "" "${CMAKE_PREFIX_PATH}" "${CMAKE_PREFIX_PATH}")
-  endif()
-endif()
-
 # Global flags.
 set(CMAKE_CXX_EXTENSIONS OFF)
 set(CMAKE_CXX_STANDARD 17)
@@ -38,14 +28,10 @@ if (NOT CMAKE_OSX_DEPLOYMENT_TARGET)
 endif()
 
 # Find Qt.
-find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Core)
-find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Core Widgets Svg)
-
-if(${QT_VERSION_MAJOR} STREQUAL "6")
-  qt_standard_project_setup()
-endif()
+find_package(Qt6 REQUIRED COMPONENTS Core Widgets Svg)
+qt_standard_project_setup()
 
-include(DeployQt)
+# include(DeployQt)
 
 # The library.
 add_subdirectory(lib)

CMakePresets.json

@@ -13,7 +13,7 @@
       "generator": "Xcode",
       "binaryDir": "${sourceDir}/_build",
       "cacheVariables": {
-        "QT_DIR": "/opt/homebrew/opt/qt/lib/cmake/Qt5"
+        "CMAKE_PREFIX_PATH": "/opt/homebrew/opt/qt/lib/cmake/Qt6"
       },
       "condition": {
         "type": "equals",
@@ -28,7 +28,7 @@
       "generator": "Visual Studio 17 2022",
       "binaryDir": "${sourceDir}/_build",
       "cacheVariables": {
-        "CMAKE_PREFIX_PATH": "C:/Qt/5.15.2/msvc2019_64/lib/cmake/Qt5"
+        "CMAKE_PREFIX_PATH": "C:/Qt/6.8.0/msvc2022_64"
       },
       "condition": {
         "type": "equals",

README.md

@@ -1,22 +1,21 @@
 <div align="center">
   <a href="https://oclero.github.io/qlementine">
-	  <img style="margin-bottom: 2em;"  src="branding/thumbnail.png">
+    <img style="margin-bottom: 2em;"  src="branding/thumbnail.png">
   </a>
 </div>
 
 # Qlementine
 
-[![License: MIT](https://img.shields.io/badge/license-MIT-green)](https://mit-license.org/)
-[![CMake version](https://img.shields.io/badge/CMake-3.17.5+-064F8C?logo=cmake)](https://www.qt.io)
+[![License: MIT](https://img.shields.io/badge/license-MIT-green)](https://mit-license.org)
+[![CMake version](https://img.shields.io/badge/CMake-3.21.0+-064F8C?logo=cmake)](https://cmake.org)
 [![C++ version](https://img.shields.io/badge/C++-17-00599C?logo=++)](https://www.qt.io)
-[![Qt version](https://img.shields.io/badge/Qt-5.15.3+-41CD52?logo=qt)](https://www.qt.io)
-[![Qt version](https://img.shields.io/badge/Qt-6.0.0+-41CD52?logo=qt)](https://www.qt.io)
+[![Qt version](https://img.shields.io/badge/Qt-6.8.0+-41CD52?logo=qt)](https://www.qt.io)
 
 [![Linux](https://github.com/oclero/qlementine/actions/workflows/linux.yml/badge.svg)](https://github.com/oclero/qlementine/actions/workflows/linux.yml)
 [![Linux](https://github.com/oclero/qlementine/actions/workflows/windows.yml/badge.svg)](https://github.com/oclero/qlementine/actions/workflows/windows.yml)
 [![Linux](https://github.com/oclero/qlementine/actions/workflows/macos.yml/badge.svg)](https://github.com/oclero/qlementine/actions/workflows/macos.yml)
 
-Modern QStyle for desktop Qt5/Qt6 applications.
+Modern QStyle for desktop Qt6 applications.
 
 See [documentation](https://oclero.github.io/qlementine) for more information.
 
@@ -35,8 +34,8 @@ See [documentation](https://oclero.github.io/qlementine) for more information.
 ## Requirements
 
 - Windows, MacOS or Linux.
-- [CMake 3.20.0+](https://cmake.org/download)
-- [Qt 5.15.3+ or Qt 6.0.0+](https://www.qt.io/download-qt-installer)
+- [CMake 3.21.0+](https://cmake.org/download)
+- [Qt 6.8.0+](https://www.qt.io/download-qt-installer)
 
 ## Features
 

docs/index.md

@@ -4,7 +4,7 @@
 
 # Qlementine
 
-[Qlementine](https://github.com/oclero/qlementine) is a modern QStyle for desktop Qt5/Qt6 applications, released under the MIT license.
+[Qlementine](https://github.com/oclero/qlementine) is a modern QStyle for desktop Qt6 applications, released under the MIT license.
 
 ## Library content
 
@@ -17,8 +17,8 @@ This library contains:
 ## Requirements
 
 - Windows, MacOS or Linux.
-- [CMake 3.17.5+](https://cmake.org/download)
-- [Qt 5.15.3+ or Qt 6.0.0+](https://www.qt.io/download-qt-installer)
+- [CMake 3.21.0+](https://cmake.org/download)
+- [Qt 6.8.0+](https://www.qt.io/download-qt-installer)
 
 ## FAQ
 

docs/usage.md

@@ -16,7 +16,7 @@
    target_link_libraries(your_project oclero::qlementine)
    ```
 
-## Usage
+## Usage in code
 
 Define the `QStyle` on your `QApplication`.
 

lib/CMakeLists.txt

@@ -1,13 +1,5 @@
 set(LIB_TARGET_NAME ${PROJECT_NAME})
 
-find_package(Qt${QT_VERSION_MAJOR}
-  COMPONENTS
-    Core
-    Widgets
-    Svg
-  REQUIRED
-)
-
 # Declare files.
 set(SOURCES
   ${CMAKE_CURRENT_SOURCE_DIR}/src/animation/WidgetAnimator.cpp
@@ -111,19 +103,16 @@ set(RESOURCES
   $<$<PLATFORM_ID:Windows>:resources/qlementine_font_inter_windows.qrc>
 )
 
-# Configure target.
-add_library(${LIB_TARGET_NAME} STATIC)
+# Create target.
+qt_add_library(${LIB_TARGET_NAME} STATIC
+  ${HEADERS}
+  ${SOURCES}
+  ${RESOURCES}
+)
 
 # Create a target alias.
 add_library(${PROJECT_NAMESPACE}::${LIB_TARGET_NAME} ALIAS ${LIB_TARGET_NAME})
 
-target_sources(${LIB_TARGET_NAME}
-  PRIVATE
-    ${HEADERS}
-    ${SOURCES}
-    ${RESOURCES}
-)
-
 target_include_directories(${LIB_TARGET_NAME}
   PUBLIC
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
@@ -132,9 +121,9 @@ target_include_directories(${LIB_TARGET_NAME}
 )
 
 target_link_libraries(${LIB_TARGET_NAME} PUBLIC
-  Qt::Core
-  Qt::Widgets
-  Qt::Svg
+  Qt6::Core
+  Qt6::Widgets
+  Qt6::Svg
 )
 
 set_target_properties(${LIB_TARGET_NAME}

lib/include/oclero/qlementine/widgets/AbstractItemListWidget.hpp

@@ -80,11 +80,7 @@ class AbstractItemListWidget : public QWidget {
   void keyPressEvent(QKeyEvent* e) override;
   void keyReleaseEvent(QKeyEvent* e) override;
   void mousePressEvent(QMouseEvent* e) override;
-#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
-  void enterEvent(QEvent* e) override;
-#else
   void enterEvent(QEnterEvent* e) override;
-#endif
   void leaveEvent(QEvent* e) override;
   void mouseReleaseEvent(QMouseEvent* e) override;
   void mouseMoveEvent(QMouseEvent* e) override;

lib/include/oclero/qlementine/widgets/Switch.hpp

@@ -24,11 +24,7 @@ class Switch : public QAbstractButton {
 
 protected:
   void paintEvent(QPaintEvent* e) override;
-#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
-  void enterEvent(QEvent* e) override;
-#else
   void enterEvent(QEnterEvent* e) override;
-#endif
   void leaveEvent(QEvent* e) override;
   void changeEvent(QEvent* e) override;
   void focusInEvent(QFocusEvent* e) override;

lib/src/style/QlementineStyle.cpp

@@ -1755,12 +1755,8 @@ void QlementineStyle::drawControl(ControlElement ce, const QStyleOption* opt, QP
             const auto autoIconColor = this->autoIconColor(w);
             const auto colorize = autoIconColor != AutoIconColor::None;
             const auto iconMode = (optHeader->state & State_Enabled || colorize) ? QIcon::Normal : QIcon::Disabled;
-#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
-            const auto iconPixmap = icon.pixmap(qlementine::getWindow(w), { iconExtent, iconExtent }, iconMode);
-#else
             const auto iconPixmap =
               icon.pixmap({ iconExtent, iconExtent }, qlementine::getWindow(w)->devicePixelRatio(), iconMode);
-#endif
             const auto& colorizedPixmap = colorize ? qlementine::colorizePixmap(iconPixmap, fgColor) : iconPixmap;
             p->drawPixmap(iconRect, colorizedPixmap);
           }
@@ -3759,13 +3755,7 @@ QSize QlementineStyle::sizeFromContents(
 
           // Shortcut. NB: Some difficulties to understand what's going on. Qt changes the width so here's a hack.
           const auto hasShortcut = shortcut.length() > 0;
-
-#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
-          const auto reservedShortcutW = optMenuItem->tabWidth;
-#else
           const auto reservedShortcutW = optMenuItem->reservedShortcutWidth;
-#endif
-
           const auto shortcutW = hasShortcut ? 3 * spacing - reservedShortcutW : 0;
 
           // Icon.
@@ -4098,12 +4088,6 @@ int QlementineStyle::pixelMetric(PixelMetric m, const QStyleOption* opt, const Q
       return _impl->theme.iconSize.height();
 
     // Dialog.
-    case PM_DialogButtonsSeparator:
-      break;
-    case PM_DialogButtonsButtonWidth:
-      break;
-    case PM_DialogButtonsButtonHeight:
-      return _impl->theme.controlHeightLarge;
     case PM_MessageBoxIconSize:
       return _impl->theme.iconSizeLarge.height();
 

lib/src/utils/ColorUtils.cpp

@@ -145,17 +145,10 @@ std::optional<QColor> tryGetColorFromHexaString(QString const& str) {
   if (str.startsWith('#') && (length == RGB_LENGTH || length == RGBA_LENGTH)) {
     auto success{ false };
 
-#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
-    const auto r_str = str.midRef(1, 2);
-    const auto g_str = str.midRef(3, 2);
-    const auto b_str = str.midRef(5, 2);
-    const auto a_str = str.midRef(7, 2);
-#else
     const auto r_str = str.mid(1, 2);
     const auto g_str = str.mid(3, 2);
     const auto b_str = str.mid(5, 2);
     const auto a_str = str.mid(7, 2);
-#endif
 
     const auto r = r_str.toInt(&success, HEX_BASE);
     if (success) {
@@ -180,11 +173,7 @@ std::optional<QColor> tryGetColorFromHexaString(QString const& str) {
 }
 
 std::optional<QColor> tryGetColorFromVariant(QVariant const& variant) {
-#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
-  const auto variantType = static_cast<QMetaType::Type>(variant.type());
-#else
   const auto variantType = variant.typeId();
-#endif
 
   // Channel list ([RRR, GGG, BBB, AAA]).
   if (variantType == QMetaType::Type::QVariantList) {