initial commit

Author: ndonkoHenri

CHANGELOG.md

@@ -17,6 +17,7 @@
 * Fix `CodeEditor` background not filling the entire area when `expand=True` ([#6407](https://github.com/flet-dev/flet/pull/6407)) by @FeodorFitsner.
 * Handle unbounded width in `ResponsiveRow` with an explicit error, treat child controls with `col=0` as hidden, and clarify `Container` expansion behavior when `alignment` is set ([#1951](https://github.com/flet-dev/flet/issues/1951), [#3805](https://github.com/flet-dev/flet/issues/3805), [#5209](https://github.com/flet-dev/flet/issues/5209), [#6354](https://github.com/flet-dev/flet/pull/6354)) by @ndonkoHenri.
 * Fix `find_platform_image` selecting incompatible icon formats (e.g. `.icns` on Windows) by ranking glob results per target platform ([#6381](https://github.com/flet-dev/flet/pull/6381)) by @HG-ha.
+* Fix `page.window.destroy()` taking several seconds to close Windows desktop apps when `prevent_close` is enabled ([#5459](https://github.com/flet-dev/flet/issues/5459)) by @ndonkoHenri.
 * Fix `Page.show_drawer()`, `close_drawer()`, and root/top view accessors (`appbar`, `drawer`, `navigation_bar`, `controls`, ...) failing with `TypeError` under `Page.render_views()` by unwrapping component-wrapped views and normalizing single-view returns ([#6413](https://github.com/flet-dev/flet/issues/6413), [#6414](https://github.com/flet-dev/flet/pull/6414)) by @FeodorFitsner.
 * Fix `auto_scroll` on scrollable controls silently doing nothing unless `scroll` was also explicitly set ([#6397](https://github.com/flet-dev/flet/issues/6397), [#6404](https://github.com/flet-dev/flet/pull/6404)) by @ndonkoHenri.
 

packages/flet/lib/src/utils/desktop.dart

@@ -272,6 +272,15 @@ Future blurWindow() async {
 Future destroyWindow() async {
   if (isDesktopPlatform()) {
     debugPrint("destroyWindow()");
+    if (isWindowsDesktop()) {
+      // Work around window_manager.destroy() stalling on Windows:
+      // https://github.com/leanflutter/window_manager/issues/478#issuecomment-2423413104
+      if (await windowManager.isPreventClose()) {
+        await windowManager.setPreventClose(false);
+      }
+      await windowManager.close();
+      return;
+    }
     await windowManager.destroy();
   }
 }