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authorMorten Sørvig <morten.sorvig@qt.io>2022-06-13 17:33:16 +0200
committerTor Arne Vestbø <tor.arne.vestbo@qt.io>2022-06-16 23:01:04 +0200
commit077eddb3e1aaba1517d67e7c83574c16e971dc67 (patch)
tree55234b906d04bf1a6e1b3a0b7a02b839300cdac8 /src/plugins/platforms/windows/qwindowscontext.cpp
parent7037f4620fb59b669d32fbce0ef79aabe38a716a (diff)
Windows QPA: Update screen on child window DPI change
Windows does not send WM_DPICHANGED to child windows, which means that the normal DPI change handling code does not run for QWindows which are embedded in a foreign, non-Qt, window. Add code which handles WM_DPICHANGED_AFTERPARENT. This event is sent to all child windows, but not the top-level window. Call checkForScreenChanged() here, similar to what the WM_DPICHANGED code does. This commit does not add code to resize the child window, since it is uncertain if this is the responsibility of the window which receives WM_DPICHANGED, or of each child window. Done-with: Tor Arne Vestbø <tor.arne.vestbo@qt.io> Pick-to: 6.4 Task-number: QTBUG-103383 Change-Id: Icf85dd0afa806609dbbe0ffc36efbc5127962c39 Reviewed-by: <stefan.wastl@native-instruments.de> Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Diffstat (limited to 'src/plugins/platforms/windows/qwindowscontext.cpp')
-rw-r--r--src/plugins/platforms/windows/qwindowscontext.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/plugins/platforms/windows/qwindowscontext.cpp b/src/plugins/platforms/windows/qwindowscontext.cpp
index 6dece1a518..68d2e5d98d 100644
--- a/src/plugins/platforms/windows/qwindowscontext.cpp
+++ b/src/plugins/platforms/windows/qwindowscontext.cpp
@@ -1325,6 +1325,9 @@ bool QWindowsContext::windowsProc(HWND hwnd, UINT message,
case QtWindows::DpiChangedEvent:
platformWindow->handleDpiChanged(hwnd, wParam, lParam);
return true;
+ case QtWindows::DpiChangedAfterParentEvent:
+ platformWindow->handleDpiChangedAfterParent(hwnd);
+ return true;
#if QT_CONFIG(sessionmanager)
case QtWindows::QueryEndSessionApplicationEvent: {
QWindowsSessionManager *sessionManager = platformSessionManager();