windowstate: framework

Author: knopp

packages/flutter/lib/src/widgets/window_win32.dart

@@ -143,6 +143,44 @@ class RegularWindowControllerWin32 extends RegularWindowController
     ffi.calloc.free(ffiSizing);
   }
 
+  @override
+  bool isFullscreen() {
+    return false;
+  }
+
+   @override
+  void setFullscreen(bool fullscreen, {int? displayId}) {
+
+  }
+
+  @override
+  bool isMaximized() {
+    _ensureNotDestroyed();
+    return _isZoomed(getWindowHandle()) != 0;
+  }
+
+  @override
+  bool isMinimized() {
+    _ensureNotDestroyed();
+    return _isIconic(getWindowHandle()) != 0;
+  }
+
+  @override
+  void minimize() {
+    _ensureNotDestroyed();
+    _showWindow(getWindowHandle(), SW_MINIMIZE);
+  }
+
+  @override
+  void setMaximized(bool maximized) {
+    _ensureNotDestroyed();
+    if (maximized) {
+      _showWindow(getWindowHandle(), SW_MAXIMIZE);
+    } else {
+      _showWindow(getWindowHandle(), SW_RESTORE);
+    }
+  }
+
   /// Returns HWND pointer to the top level window.
   Pointer<Void> getWindowHandle() {
     _ensureNotDestroyed();
@@ -172,6 +210,10 @@ class RegularWindowControllerWin32 extends RegularWindowController
   static const int _WM_SIZE = 0x0005;
   static const int _WM_CLOSE = 0x0010;
 
+  static const int SW_RESTORE = 9;
+  static const int SW_MAXIMIZE = 3;
+  static const int SW_MINIMIZE = 6;
+
   @override
   int? handleWindowsMessage(
     FlutterView view,
@@ -209,50 +251,20 @@ class RegularWindowControllerWin32 extends RegularWindowController
   @Native<_Size Function(Pointer<Void>)>(symbol: 'FlutterGetWindowContentSize')
   external static _Size _getWindowContentSize(Pointer<Void> windowHandle);
 
-  @Native<Int64 Function(Pointer<Void>)>(symbol: 'FlutterGetWindowState')
-  external static int _getWindowState(Pointer<Void> windowHandle);
-
-  @Native<Void Function(Pointer<Void>, Int64)>(symbol: 'FlutterSetWindowState')
-  external static void _setWindowState(Pointer<Void> windowHandle, int state);
-
   @Native<Void Function(Pointer<Void>, Pointer<ffi.Utf16>)>(symbol: 'SetWindowTextW')
   external static void _setWindowTitle(Pointer<Void> windowHandle, Pointer<ffi.Utf16> title);
 
   @Native<Void Function(Pointer<Void>, Pointer<_Sizing>)>(symbol: 'FlutterSetWindowContentSize')
   external static void _setWindowContentSize(Pointer<Void> windowHandle, Pointer<_Sizing> size);
 
-  @override
-  bool isFullscreen() {
-    // TODO: implement isFullscreen
-    throw UnimplementedError();
-  }
+  @Native<Void Function(Pointer<Void>, Int32)>(symbol: 'ShowWindow')
+  external static void _showWindow(Pointer<Void> windowHandle, int command);
 
-  @override
-  bool isMaximized() {
-    // TODO: implement isMaximized
-    throw UnimplementedError();
-  }
+  @Native<Int32 Function(Pointer<Void>)>(symbol: 'IsIconic')
+  external static int _isIconic(Pointer<Void> windowHandle);
 
-  @override
-  bool isMinimized() {
-    // TODO: implement isMinimized
-    throw UnimplementedError();
-  }
-
-  @override
-  void minimize() {
-    // TODO: implement minimize
-  }
-
-  @override
-  void setFullscreen(bool fullscreen, {int? displayId}) {
-    // TODO: implement setFullscreen
-  }
-
-  @override
-  void setMaximized(bool maximized) {
-    // TODO: implement setMaximized
-  }
+  @Native<Int32 Function(Pointer<Void>)>(symbol: 'IsZoomed')
+  external static int _isZoomed(Pointer<Void> windowHandle);
 }
 
 /// Request to initialize windowing system.