fix bug #373

src/FluFrameless.cpp

@@ -12,6 +12,23 @@ static inline QByteArray qtNativeEventType()
 }
 #endif
 
+static inline bool isCompositionEnabled(){
+    typedef HRESULT (WINAPI* DwmIsCompositionEnabledPtr)(BOOL *pfEnabled);
+    HMODULE module = LoadLibraryW(L"dwmapi.dll");
+    if (module)
+    {
+        BOOL composition_enabled = false;
+        DwmIsCompositionEnabledPtr dwm_is_composition_enabled;
+        dwm_is_composition_enabled= reinterpret_cast<DwmIsCompositionEnabledPtr>(GetProcAddress(module, "DwmIsCompositionEnabled"));
+        if (dwm_is_composition_enabled)
+        {
+            dwm_is_composition_enabled(&composition_enabled);
+        }
+        return composition_enabled;
+    }
+    return false;
+}
+
 FramelessEventFilter::FramelessEventFilter(QQuickWindow* window){
     _window = window;
     _current = window->winId();
@@ -23,25 +40,27 @@ bool FramelessEventFilter::nativeEventFilter(const QByteArray &eventType, void *
         return false;
     }
     const auto msg = static_cast<const MSG *>(message);
-    const HWND hWnd = msg->hwnd;
-    if (!hWnd) {
+    const HWND hwnd = msg->hwnd;
+    if (!hwnd) {
         return false;
     }
-    const qint64 wid = reinterpret_cast<qint64>(hWnd);
+    const qint64 wid = reinterpret_cast<qint64>(hwnd);
     if(wid != _current){
         return false;
     }
     const UINT uMsg = msg->message;
-    if (!msg || !msg->hwnd)
+    const WPARAM wParam = msg->wParam;
+    const LPARAM lParam = msg->lParam;
+    if (!msg || !hwnd)
     {
         return false;
     }
     if(uMsg == WM_WINDOWPOSCHANGING){
-        WINDOWPOS* wp = reinterpret_cast<WINDOWPOS*>(msg->lParam);
+        WINDOWPOS* wp = reinterpret_cast<WINDOWPOS*>(lParam);
         if (wp != nullptr && (wp->flags & SWP_NOSIZE) == 0)
         {
             wp->flags |= SWP_NOCOPYBITS;
-            *result = DefWindowProc(msg->hwnd, msg->message, msg->wParam, msg->lParam);
+            *result = DefWindowProc(hwnd, uMsg, wParam, lParam);
             return true;
         }
         return false;
@@ -49,8 +68,22 @@ bool FramelessEventFilter::nativeEventFilter(const QByteArray &eventType, void *
         *result = WVR_REDRAW;
         return true;
     }else if(uMsg == WM_NCPAINT){
+        if(!isCompositionEnabled()){
             *result = WVR_REDRAW;
+            return true;
+        }
         return false;
+    }else if(uMsg == WM_NCACTIVATE){
+        if(isCompositionEnabled()){
+            *result = DefWindowProc(hwnd, uMsg, wParam, -1);
+        }else{
+            if (wParam == FALSE) {
+                *result = TRUE;
+            } else {
+                *result = FALSE;
+            }
+        }
+        return true;
     }
     return false;
 #endif
@@ -90,7 +123,7 @@ void FluFrameless::updateCursor(int edges){
 }
 
 bool FluFrameless::eventFilter(QObject *obj, QEvent *ev){
-    if (!_window.isNull() && _window->flags()& Qt::FramelessWindowHint) {
+    if (!_window.isNull()) {
 
         static int edges = 0;
         const int margin = 8;
@@ -156,25 +189,29 @@ void FluFrameless::componentComplete(){
         o = o->parent();
     }
     if(!_window.isNull()){
-        _window->setFlag(Qt::FramelessWindowHint,true);
-        _window->installEventFilter(this);
 #ifdef Q_OS_WIN
         _nativeEvent =new FramelessEventFilter(_window);
         qApp->installNativeEventFilter(_nativeEvent);
         HWND hwnd = reinterpret_cast<HWND>(_window->winId());
         ULONG_PTR cNewStyle = GetClassLongPtr(hwnd, GCL_STYLE) | CS_DROPSHADOW;
         SetClassLongPtr(hwnd, GCL_STYLE, cNewStyle);
+        DWORD style = GetWindowLongPtr(hwnd,GWL_STYLE);
+        SetWindowLongPtr(hwnd,GWL_STYLE,style &~ WS_SYSMENU);
         SetWindowPos(hwnd,nullptr,0,0,0,0,SWP_NOZORDER | SWP_NOOWNERZORDER | SWP_NOMOVE | SWP_NOSIZE |SWP_FRAMECHANGED);
+#else
+        _window->setFlag(Qt::FramelessWindowHint,true);
 #endif
+        _window->installEventFilter(this);
     }
 }
 
 FluFrameless::~FluFrameless(){
     if (!_window.isNull()) {
-        _window->setFlag(Qt::FramelessWindowHint,false);
         _window->removeEventFilter(this);
 #ifdef Q_OS_WIN
         qApp->removeNativeEventFilter(_nativeEvent);
+#else
+        _window->setFlag(Qt::FramelessWindowHint,false);
 #endif
     }
 }

src/Qt5/imports/FluentUI/Controls/FluWindow.qml

@@ -197,6 +197,14 @@ Window {
     FluLoader{
         id:loader_frameless
     }
+    Item{
+        anchors.fill: parent
+        anchors.margins: {
+            if(FluTools.isWin() && !window.useSystemAppBar){
+                return window.visibility === Window.Maximized ? 8 : 0
+            }
+            return 0
+        }
         onWidthChanged: {
             window.appBar.width = width
         }
@@ -253,6 +261,7 @@ Window {
                 return true
             }
         }
+    }
     function destoryOnClose(){
         lifecycle.onDestoryOnClose()
     }

src/Qt6/imports/FluentUI/Controls/FluWindow.qml

@@ -196,6 +196,14 @@ Window {
     FluLoader{
         id:loader_frameless
     }
+    Item{
+        anchors.fill: parent
+        anchors.margins: {
+            if(FluTools.isWin() && !window.useSystemAppBar){
+                return window.visibility === Window.Maximized ? 8 : 0
+            }
+            return 0
+        }
         onWidthChanged: {
             window.appBar.width = width
         }
@@ -252,6 +260,7 @@ Window {
                 return true
             }
         }
+    }
     function destoryOnClose(){
         lifecycle.onDestoryOnClose()
     }