win: minor fix

include/FramelessHelper/Quick/private/framelessquickhelper_p.h

@@ -87,6 +87,7 @@ public:
     bool qpaReady = false;
     quint32 qpaWaitTime = 0;
     QTimer repaintTimer{};
+    bool repaintedOnce = false;
 };
 
 FRAMELESSHELPER_END_NAMESPACE

include/FramelessHelper/Widgets/private/framelesswidgetshelper_p.h

@@ -87,6 +87,7 @@ public:
     QSizePolicy savedSizePolicy = {};
     quint32 qpaWaitTime = 0;
     QTimer repaintTimer{};
+    bool repaintedOnce = false;
 };
 
 FRAMELESSHELPER_END_NAMESPACE

src/quick/framelessquickhelper.cpp

@@ -410,10 +410,7 @@ void FramelessQuickHelperPrivate::repaintAllChildren()
 void FramelessQuickHelperPrivate::doRepaintAllChildren()
 {
     repaintTimer.stop();
-    static bool firstTime = true;
-    if (firstTime) {
-        firstTime = false;
-    } else {
+    if (repaintedOnce) {
         Q_Q(const FramelessQuickHelper);
         QQuickWindow *window = q->window();
         if (!window) {
@@ -423,7 +420,7 @@ void FramelessQuickHelperPrivate::doRepaintAllChildren()
         // Sync the internal window frame margins with the latest DPI, otherwise
         // we will get wrong window sizes after the DPI change.
         std::ignore = Utils::updateInternalWindowFrameMargins(window, true);
-#endif // Q_OS_WINDOWS
+#endif // Q_OS_WINDOWS \
     // No need to repaint the window when it's hidden.
         if (!window->isVisible()) {
             return;
@@ -446,6 +443,8 @@ void FramelessQuickHelperPrivate::doRepaintAllChildren()
             }
         }
 #endif
+    } else {
+        repaintedOnce = true;
     }
 }
 

src/widgets/framelesswidgetshelper.cpp

@@ -375,18 +375,17 @@ void FramelessWidgetsHelperPrivate::repaintAllChildren()
 void FramelessWidgetsHelperPrivate::doRepaintAllChildren()
 {
     repaintTimer.stop();
+    if (repaintedOnce) {
         if (!window) {
             return;
         }
-    static bool firstTime = true;
-    if (firstTime) {
-        firstTime = false;
-    } else {
         forceWidgetRepaint(window);
         const QList<QWidget *> widgets = window->findChildren<QWidget *>();
         for (auto &&widget : std::as_const(widgets)) {
             forceWidgetRepaint(widget);
         }
+    } else {
+        repaintedOnce = true;
     }
 }