on macos need to fix lightmode -> dark mode

Author: palaashatri

gui/main.py

@@ -314,25 +314,106 @@ def _apply_native_theme(self) -> None:
             style.theme_use(style.theme_use())
 
         def _apply_theme(self, dark: bool) -> None:
-            # Always use native macOS theme for consistency
-            self._apply_native_theme()
-            
             style = ttk.Style()
 
+            # Update appearance based on dark mode preference
+            if sys.platform == "darwin":
+                # On macOS, set the appearance mode
+                try:
+                    # This tells macOS to use dark or light appearance
+                    appearance = "darkAqua" if dark else "aqua"
+                    self.root.tk.call("::tk::unsupported::MacWindowStyle", "appearance", self.root._w, appearance)
+                    
+                    # Force the window to redraw with new appearance
+                    self.root.update()
+                except Exception:
+                    pass
+                
+                # Apply aqua theme (it will adapt to the appearance we just set)
+                if "aqua" in style.theme_names():
+                    style.theme_use("aqua")
+            elif sys.platform == "win32":
+                # Apply Windows native theme first
+                for name in ("vista", "xpnative", "winnative"):
+                    if name in style.theme_names():
+                        style.theme_use(name)
+                        break
+            
             # Minimal styling - let native theme handle colors
             style.configure("Primary.TButton", padding=(PADDING_MEDIUM, PADDING_SMALL))
             style.configure("TLabelframe.Label", font=("TkDefaultFont", 10, "bold"))
             style.configure("Header.TLabel", font=("TkDefaultFont", 16, "bold"))
 
-            # Update appearance based on dark mode preference
-            if sys.platform == "darwin":
-                # On macOS, set the appearance mode
+            # Windows-specific theming
+            if sys.platform == "win32":
+                # On Windows, manually apply dark/light theme colors
                 try:
-                    # This tells macOS to use dark or light appearance
                     if dark:
-                        self.root.tk.call("::tk::unsupported::MacWindowStyle", "appearance", self.root._w, "darkAqua")
+                        # Dark theme colors
+                        bg_color = "#1e1e1e"
+                        fg_color = "#ffffff"
+                        select_bg = "#094771"
+                        select_fg = "#ffffff"
+                        
+                        self.root.configure(bg=bg_color)
+                        style.configure(".", background=bg_color, foreground=fg_color,
+                                      fieldbackground=bg_color, selectbackground=select_bg,
+                                      selectforeground=select_fg)
+                        style.configure("TFrame", background=bg_color)
+                        style.configure("TLabel", background=bg_color, foreground=fg_color)
+                        style.configure("TLabelframe", background=bg_color, foreground=fg_color)
+                        style.configure("TLabelframe.Label", background=bg_color, foreground=fg_color)
+                        style.configure("Header.TLabel", background=bg_color, foreground=fg_color)
+                        style.configure("TButton", background=bg_color, foreground=fg_color)
+                        style.configure("TCheckbutton", background=bg_color, foreground=fg_color)
+                        style.configure("TRadiobutton", background=bg_color, foreground=fg_color)
+                        style.configure("TNotebook", background=bg_color, foreground=fg_color)
+                        style.configure("TNotebook.Tab", background=bg_color, foreground=fg_color)
+                        
+                        # Try to set title bar to dark mode (Windows 10 build 17763+)
+                        try:
+                            import ctypes
+                            hwnd = ctypes.windll.user32.GetParent(self.root.winfo_id())
+                            DWMWA_USE_IMMERSIVE_DARK_MODE = 20
+                            ctypes.windll.dwmapi.DwmSetWindowAttribute(
+                                hwnd, DWMWA_USE_IMMERSIVE_DARK_MODE,
+                                ctypes.byref(ctypes.c_int(1)), ctypes.sizeof(ctypes.c_int)
+                            )
+                        except Exception:
+                            pass
                     else:
-                        self.root.tk.call("::tk::unsupported::MacWindowStyle", "appearance", self.root._w, "aqua")
+                        # Light theme colors (system defaults)
+                        bg_color = "#f0f0f0"
+                        fg_color = "#000000"
+                        select_bg = "#0078d7"
+                        select_fg = "#ffffff"
+                        
+                        self.root.configure(bg=bg_color)
+                        style.configure(".", background=bg_color, foreground=fg_color,
+                                      fieldbackground="#ffffff", selectbackground=select_bg,
+                                      selectforeground=select_fg)
+                        style.configure("TFrame", background=bg_color)
+                        style.configure("TLabel", background=bg_color, foreground=fg_color)
+                        style.configure("TLabelframe", background=bg_color, foreground=fg_color)
+                        style.configure("TLabelframe.Label", background=bg_color, foreground=fg_color)
+                        style.configure("Header.TLabel", background=bg_color, foreground=fg_color)
+                        style.configure("TButton", background=bg_color, foreground=fg_color)
+                        style.configure("TCheckbutton", background=bg_color, foreground=fg_color)
+                        style.configure("TRadiobutton", background=bg_color, foreground=fg_color)
+                        style.configure("TNotebook", background=bg_color, foreground=fg_color)
+                        style.configure("TNotebook.Tab", background=bg_color, foreground=fg_color)
+                        
+                        # Try to set title bar to light mode
+                        try:
+                            import ctypes
+                            hwnd = ctypes.windll.user32.GetParent(self.root.winfo_id())
+                            DWMWA_USE_IMMERSIVE_DARK_MODE = 20
+                            ctypes.windll.dwmapi.DwmSetWindowAttribute(
+                                hwnd, DWMWA_USE_IMMERSIVE_DARK_MODE,
+                                ctypes.byref(ctypes.c_int(0)), ctypes.sizeof(ctypes.c_int)
+                            )
+                        except Exception:
+                            pass
                 except Exception:
                     pass