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5.15.2: fix for QTBUG-90628 (Fix flicker when resizing translucent windows with QSizeGrip)

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This commit is contained in:
kleuter 2021-05-14 17:41:17 +02:00
parent 0d95d8a0e5
commit 0edfa1c087
1 changed files with 15 additions and 3 deletions
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18
5.15.2/qtbase/src/widgets/widgets/qsizegrip.cpp
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@ -271,6 +271,18 @@ static Qt::Edges edgesFromCorner(Qt::Corner corner)
return Qt::Edges{};
}
static bool usePlatformSizeGrip(const QWidget *tlw)
{
const QString &platformName = QGuiApplication::platformName();
if (platformName.contains(u"xcb")) // ### FIXME QTBUG-69716
return false;
if (tlw->testAttribute(Qt::WA_TranslucentBackground)
&& platformName == u"windows") {
return false; // QTBUG-90628, flicker when using translucency
}
return true;
}
void QSizeGrip::mousePressEvent(QMouseEvent * e)
{
if (e->button() != Qt::LeftButton) {
@ -290,11 +302,11 @@ void QSizeGrip::mousePressEvent(QMouseEvent * e)
&& tlw->windowHandle()
&& !(tlw->windowFlags() & Qt::X11BypassWindowManagerHint)
&& !tlw->testAttribute(Qt::WA_DontShowOnScreen)
&& !tlw->hasHeightForWidth()) {
&& !tlw->hasHeightForWidth()
&& usePlatformSizeGrip(tlw)) {
QPlatformWindow *platformWindow = tlw->windowHandle()->handle();
const Qt::Edges edges = edgesFromCorner(d->m_corner);
if (!QGuiApplication::platformName().contains(QStringLiteral("xcb"))) // ### FIXME QTBUG-69716
d->m_platformSizeGrip = platformWindow && platformWindow->startSystemResize(edges);
d->m_platformSizeGrip = platformWindow->startSystemResize(edges);
}
if (d->m_platformSizeGrip)