Init the kivy framework

main.kv

@@ -1 +1,13 @@
-# kivy v2.1.0
+#:kivy 2.1.0
+
+WindowManager:
+    MenuScreen:
+        name: "menu"
+    GameScreen:
+        name: "game"
+    SettingsScreen:
+        name: "settings"
+    GameOverScreen:
+        name: "game_over"
+    AchievementsScreen:
+        name: "achievements"

main.py

@@ -1 +1,124 @@
-__version__ = "2.0.0"
+"""
+Main module of the generator of dialogs.
+"""
+
+
+###############
+### Imports ###
+###############
+
+
+### Python imports ###
+
+import os
+
+### Kivy imports ###
+
+from kivy.app import App
+from kivy.uix.screenmanager import ScreenManager, NoTransition, Screen
+from kivy.lang import Builder
+from kivy.uix.widget import Widget
+
+### Module imports ###
+
+from tools.tools_constants import (
+    PATH_KIVY_FOLDER,
+    PATH_IMAGES,
+    MOBILE_MODE
+)
+from screens import (
+    MenuScreen,
+    GameScreen,
+    SettingsScreen,
+    GameOverScreen,
+    AchievementsScreen
+)
+from tools.tools_kivy import (
+    color_label,
+    background_color,
+    Window
+)
+from tools.tools_sound import (
+    music_mixer
+)
+
+
+def change_window_size(*args):
+    global WINDOW_SIZE, SCREEN_RATIO
+
+    # Compute the size of one tile in pixel
+    WINDOW_SIZE = Window.size
+    SCREEN_RATIO = WINDOW_SIZE[0] / WINDOW_SIZE[1]
+
+
+Window.bind(on_resize=change_window_size)
+change_window_size()
+
+# Set the fullscreen
+if not MOBILE_MODE:
+    # Window.fullscreen = "auto"
+    pass
+
+
+###############
+### General ###
+###############
+
+
+class WindowManager(ScreenManager):
+    """
+    Screen manager, which allows the navigation between the different menus.
+    """
+
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+        self.gray_color = background_color
+        self.color_label = color_label
+        self.transition = NoTransition()
+        self.add_widget(Screen(name="opening"))
+        self.current = "opening"
+        self.list_former_screens = []
+
+    def init_screen(self, screen_name, *args):
+        if screen_name == "game":
+            music_mixer.play("game_music", loop=True)
+        Window.clearcolor = self.gray_color
+        self.current = screen_name
+        self.get_screen(self.current).init_screen(*args)
+
+
+class MainApp(App, Widget):
+    """
+    Main class of the application.
+    """
+
+    def build(self):
+        """
+        Build the application.
+
+        Parameters
+        ----------
+        None
+
+        Returns
+        -------
+        None
+        """
+        Window.clearcolor = (0, 0, 0, 1)
+        self.icon = PATH_IMAGES + "logo.png"
+
+    def on_start(self):
+        if MOBILE_MODE:
+            Window.update_viewport()
+        music_mixer.play("title_music", loop=True)
+        self.root_window.children[0].init_screen("menu")
+        return super().on_start()
+
+
+# Run the application
+if __name__ == "__main__":
+    for file_name in os.listdir(PATH_KIVY_FOLDER):
+        if file_name.endswith(".kv"):
+            Builder.load_file(PATH_KIVY_FOLDER + file_name, encoding="utf-8")
+    MainApp().run()
+

resources/kivy/achievements.kv

@@ -0,0 +1,52 @@
+#:kivy 2.1.0
+<CollectionScreen>:
+
+    Image:
+        id: back_image
+        source: root.path_back_image
+        size_hint: None,None
+        width: root.width_back_image
+        height: root.height_back_image
+        pos_hint: {"center_x":0.5,"center_y":0.5}
+        allow_stretch: True
+        keep_ratio: True
+
+    Image:
+        source: root.path_images + "back_arrow.png"
+        size_hint: None, 0.1
+        pos_hint: {"x":0.025, "top": 0.975}
+        allow_stretch: True
+        width: self.height
+    Button:
+        size_hint: None, 0.1
+        width: self.height
+        pos_hint: {"x":0.025, "top": 0.975}
+        background_color: (0, 0, 0, 0)
+        on_release:
+            root.manager.init_screen("menu")
+
+    Label:
+        text: root.counter_precious_stones
+        bold: True
+        color: root.manager.color_label
+        pos_hint: {"right":1, "top":1}
+        size_hint: 0.1, 0.1
+        font_name: root.font
+        font_size: 30*root.font_ratio
+
+    RelativeLayout:
+        size_hint: 1, 0.9
+        pos_hint: {"x":0, "y":0}
+        ScrollView:
+            id: scroll_view
+            do_scroll_x: False
+            do_scroll_y: True
+            bar_width: 0
+
+            MyScrollViewLayout:
+                id: my_sv_layout
+                cols: root.number_cols
+                spacing: root.spacing
+                padding: root.padding
+                height: self.minimum_height+root.label_height
+                pos: root.pos