diff options
Diffstat (limited to 'src/plugins/platforms/windows/qwindowswindow.cpp')
-rw-r--r-- | src/plugins/platforms/windows/qwindowswindow.cpp | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/src/plugins/platforms/windows/qwindowswindow.cpp b/src/plugins/platforms/windows/qwindowswindow.cpp index 1196190b81..5c13bd9650 100644 --- a/src/plugins/platforms/windows/qwindowswindow.cpp +++ b/src/plugins/platforms/windows/qwindowswindow.cpp @@ -2697,10 +2697,16 @@ bool QWindowsWindow::handleNonClientHitTest(const QPoint &globalPos, LRESULT *re return true; } if (localPos.y() < 0) { - const int topResizeBarPos = -frameMargins().top(); - if (localPos.y() >= topResizeBarPos) + // We want to return HTCAPTION/true only over the outer sizing frame, not the entire title bar, + // otherwise the title bar buttons (close, etc.) become unresponsive on Windows 7 (QTBUG-78262). + // However, neither frameMargins() nor GetSystemMetrics(SM_CYSIZEFRAME), etc., give the correct + // sizing frame height in all Windows versions/scales. This empirical constant seems to work, though. + const int sizingHeight = 9; + const int topResizeBarPos = sizingHeight - frameMargins().top(); + if (localPos.y() < topResizeBarPos) { *result = HTCAPTION; // Extend caption over top resize bar, let's user move the window. - return true; + return true; + } } } if (fixedWidth && (localPos.x() < 0 || localPos.x() >= size.width())) { |