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Windows QPA: Fix tray geometry not updating 

The application does not update its screens when there are
no windows on which a WM_DPICHANGE could be received. Add a
check for it to the tray window procedure and trigger an
update from there if no top levels are present.

Fixes: QTBUG-79248
Change-Id: I0b1c4db560662ecf2b473304942da373be6fdc73
Reviewed-by: André de la Rocha <andre.rocha@qt.io>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
bb10
Friedemann Kleint 2019-12-02 13:53:35 +01:00
parent 75f75e997a
commit 455e9e5be3
1 changed files with 4 additions and 0 deletions
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4
src/plugins/platforms/windows/qwindowssystemtrayicon.cpp
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@ -57,6 +57,7 @@
#include "qwindowsmenu.h"
#include "qwindowsscreen.h"
#include <QtGui/qguiapplication.h>
#include <QtGui/qpixmap.h>
#include <QtCore/qdebug.h>
#include <QtCore/qrect.h>
@ -135,6 +136,9 @@ static int indexOfHwnd(HWND hwnd)
extern "C" LRESULT QT_WIN_CALLBACK qWindowsTrayIconWndProc(HWND hwnd, UINT message,
WPARAM wParam, LPARAM lParam)
{
// QTBUG-79248: Trigger screen update if there are no other windows.
if (message == WM_DPICHANGED && QGuiApplication::topLevelWindows().isEmpty())
QWindowsContext::instance()->screenManager().handleScreenChanges();
if (message == MYWM_TASKBARCREATED || message == MYWM_NOTIFYICON
|| message == WM_INITMENU || message == WM_INITMENUPOPUP
|| message == WM_CLOSE || message == WM_COMMAND) {