changeed driectory structure, moved scaling and appearance mode functionality to super classes

customtkinter/windows/widgets/appearance_mode/appearance_mode_tracker.py

@@ -0,0 +1,135 @@
+import sys
+import tkinter
+from distutils.version import StrictVersion as Version
+from typing import Callable
+
+try:
+    import darkdetect
+
+    if Version(darkdetect.__version__) < Version("0.3.1"):
+        sys.stderr.write("WARNING: You have to upgrade the darkdetect library: pip3 install --upgrade darkdetect\n")
+        if sys.platform != "darwin":
+            exit()
+except ImportError as err:
+    raise err
+except Exception:
+    sys.stderr.write("customtkinter.appearance_mode_tracker warning: failed to import darkdetect")
+
+
+class AppearanceModeTracker:
+
+    callback_list = []
+    app_list = []
+    update_loop_running = False
+    update_loop_interval = 500  # milliseconds
+
+    appearance_mode_set_by = "system"
+    appearance_mode = 0  # Light (standard)
+
+    @classmethod
+    def init_appearance_mode(cls):
+        if cls.appearance_mode_set_by == "system":
+            new_appearance_mode = cls.detect_appearance_mode()
+
+            if new_appearance_mode != cls.appearance_mode:
+                cls.appearance_mode = new_appearance_mode
+                cls.update_callbacks()
+
+    @classmethod
+    def add(cls, callback: Callable, widget=None):
+        cls.callback_list.append(callback)
+
+        if widget is not None:
+            app = cls.get_tk_root_of_widget(widget)
+            if app not in cls.app_list:
+                cls.app_list.append(app)
+
+                if not cls.update_loop_running:
+                    app.after(cls.update_loop_interval, cls.update)
+                    cls.update_loop_running = True
+
+    @classmethod
+    def remove(cls, callback: Callable):
+        try:
+            cls.callback_list.remove(callback)
+        except ValueError:
+            return
+
+    @staticmethod
+    def detect_appearance_mode() -> int:
+        try:
+            if darkdetect.theme() == "Dark":
+                return 1  # Dark
+            else:
+                return 0  # Light
+        except NameError:
+            return 0  # Light
+
+    @classmethod
+    def get_tk_root_of_widget(cls, widget):
+        current_widget = widget
+
+        while isinstance(current_widget, tkinter.Tk) is False:
+            current_widget = current_widget.master
+
+        return current_widget
+
+    @classmethod
+    def update_callbacks(cls):
+        if cls.appearance_mode == 0:
+            for callback in cls.callback_list:
+                try:
+                    callback("Light")
+                except Exception:
+                    continue
+
+        elif cls.appearance_mode == 1:
+            for callback in cls.callback_list:
+                try:
+                    callback("Dark")
+                except Exception:
+                    continue
+
+    @classmethod
+    def update(cls):
+        if cls.appearance_mode_set_by == "system":
+            new_appearance_mode = cls.detect_appearance_mode()
+
+            if new_appearance_mode != cls.appearance_mode:
+                cls.appearance_mode = new_appearance_mode
+                cls.update_callbacks()
+
+        # find an existing tkinter.Tk object for the next call of .after()
+        for app in cls.app_list:
+            try:
+                app.after(cls.update_loop_interval, cls.update)
+                return
+            except Exception:
+                continue
+
+        cls.update_loop_running = False
+
+    @classmethod
+    def get_mode(cls) -> int:
+        return cls.appearance_mode
+
+    @classmethod
+    def set_appearance_mode(cls, mode_string: str):
+        if mode_string.lower() == "dark":
+            cls.appearance_mode_set_by = "user"
+            new_appearance_mode = 1
+
+            if new_appearance_mode != cls.appearance_mode:
+                cls.appearance_mode = new_appearance_mode
+                cls.update_callbacks()
+
+        elif mode_string.lower() == "light":
+            cls.appearance_mode_set_by = "user"
+            new_appearance_mode = 0
+
+            if new_appearance_mode != cls.appearance_mode:
+                cls.appearance_mode = new_appearance_mode
+                cls.update_callbacks()
+
+        elif mode_string.lower() == "system":
+            cls.appearance_mode_set_by = "system"