diff options
| -rw-r--r-- | src/plugins/platforms/windows/qwindowswindow.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/plugins/platforms/windows/qwindowswindow.cpp b/src/plugins/platforms/windows/qwindowswindow.cpp index 0376e363f3..dc9aa0da23 100644 --- a/src/plugins/platforms/windows/qwindowswindow.cpp +++ b/src/plugins/platforms/windows/qwindowswindow.cpp @@ -1875,6 +1875,9 @@ bool QWindowsWindow::handleWmPaint(HWND hwnd, UINT message, { if (message == WM_ERASEBKGND) // Backing store - ignored. return true; + // QTBUG-75455: Suppress WM_PAINT sent to invisible windows when setting WS_EX_LAYERED + if (!window()->isVisible() && (GetWindowLong(hwnd, GWL_EXSTYLE) & WS_EX_LAYERED) != 0) + return false; // Ignore invalid update bounding rectangles RECT updateRect; if (!GetUpdateRect(m_data.hwnd, &updateRect, FALSE)) |