AuroraMiddleware/qt5base-lts
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Fix menu position when highdpi scaling

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Certain display and scale factor configurations would
cause menus to pop up in incorrect locations or not
be shown at all.

This was due to QDesktopWidget::screenNumber() having
a toNativePixels(QRect, QWindow) call which requires
that QWindow::screen() returns the correct screen.

Break the circular dependency by converting coordinates
the other way for the intersection test: transform screen
geometry to device independent coordinates.

Task-number: QTBUG-58329
Change-Id: I5621de89a9a2b8df44bdae528baf011fc111eba3
Reviewed-by: Paolo Angelelli <paolo.angelelli@qt.io>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Morten Johan Sørvig 2017-04-05 12:39:15 +02:00
parent efb84b6189
commit 5e76cb1692
1 changed files with 3 additions and 2 deletions
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5
src/widgets/kernel/qdesktopwidget.cpp
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@ -269,12 +269,13 @@ int QDesktopWidget::screenNumber(const QWidget *w) const
QRect frame = w->frameGeometry();
if (!w->isWindow())
frame.moveTopLeft(w->mapToGlobal(QPoint(0, 0)));
const QRect nativeFrame = QHighDpi::toNativePixels(frame, winHandle);
QScreen *widgetScreen = Q_NULLPTR;
int largestArea = 0;
foreach (QScreen *screen, screens) {
const QRect intersected = screen->handle()->geometry().intersected(nativeFrame);
const QRect deviceIndependentScreenGeometry =
QHighDpi::fromNativePixels(screen->handle()->geometry(), screen);
const QRect intersected = deviceIndependentScreenGeometry.intersected(frame);
int area = intersected.width() * intersected.height();
if (largestArea < area) {
widgetScreen = screen;