Improve linux window.

lib/components/window_frame.dart

@@ -147,9 +147,10 @@ class _WindowFrameState extends State<WindowFrame> {
                             onPressed: debug,
                             child: Text('Debug'),
                           ),
-                        if (!App.isMacOS) _WindowButtons(
-                          onClose: _onClose,
-                        )
+                        if (!App.isMacOS)
+                          _WindowButtons(
+                            onClose: _onClose,
+                          )
                       ],
                     ),
                   );
@@ -559,31 +560,31 @@ class _VirtualWindowFrameState extends State<VirtualWindowFrame>
   }
 
   Widget _buildVirtualWindowFrame(BuildContext context) {
-    return DecoratedBox(
-      decoration: BoxDecoration(
-        color: Colors.transparent,
-        border: Border.all(
-          color: Theme.of(context).dividerColor,
-          width: (_isMaximized || _isFullScreen) ? 0 : 1,
-        ),
-        boxShadow: <BoxShadow>[
-          if (!_isMaximized && !_isFullScreen)
+    return Container(
+        decoration: BoxDecoration(
+          borderRadius: BorderRadius.circular(_isMaximized ? 0 : 8),
+          color: Colors.transparent,
+          boxShadow: <BoxShadow>[
             BoxShadow(
-              color: Colors.black.toOpacity(0.1),
-              offset: Offset(0.0, _isFocused ? 4 : 2),
-              blurRadius: 6,
-            )
-        ],
-      ),
-      child: widget.child,
-    );
+                color: Colors.black.toOpacity(_isFocused ? 0.4 : 0.2),
+                offset: Offset(0.0, 2),
+                blurRadius: 4,
+              )
+          ],
+        ),
+        clipBehavior: Clip.antiAlias,
+        child: widget.child,
+      );
   }
 
   @override
   Widget build(BuildContext context) {
     return DragToResizeArea(
       enableResizeEdges: (_isMaximized || _isFullScreen) ? [] : null,
-      child: _buildVirtualWindowFrame(context),
+      child: Padding(
+        padding: EdgeInsets.all(_isMaximized ? 0 : 4),
+        child: _buildVirtualWindowFrame(context),
+      ),
     );
   }
 

lib/main.dart

@@ -34,13 +34,10 @@ void main(List<String> args) {
             await windowManager.setBackgroundColor(Colors.transparent);
           }
           await windowManager.setMinimumSize(const Size(500, 600));
-          if (!App.isLinux) {
-            // https://github.com/leanflutter/window_manager/issues/460
-            var placement = await WindowPlacement.loadFromFile();
-            await placement.applyToWindow();
-            await windowManager.show();
-            WindowPlacement.loop();
-          }
+          var placement = await WindowPlacement.loadFromFile();
+          await placement.applyToWindow();
+          await windowManager.show();
+          WindowPlacement.loop();
         });
       }
     }, (error, stack) {
@@ -201,6 +198,7 @@ class _MyAppState extends State<MyApp> with WidgetsBindingObserver {
           'dark' => ThemeMode.dark,
           _ => ThemeMode.system
         },
+        color: Colors.transparent,
         localizationsDelegates: [
           GlobalMaterialLocalizations.delegate,
           GlobalCupertinoLocalizations.delegate,
@@ -248,6 +246,7 @@ class _MyAppState extends State<MyApp> with WidgetsBindingObserver {
               );
             }
             return _SystemUiProvider(Material(
+              color: App.isLinux ? Colors.transparent : null,
               child: widget,
             ));
           }