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Merge pull request #16075 from huffman/fix/mouse-look-stuck-on-macos

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BUGZ-374: Fix Mac getting stuck in mouse look
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Ryan Huffman 2019-08-20 16:25:02 -07:00 committed by GitHub
commit de476d0569
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1 changed files with 33 additions and 2 deletions
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35
interface/src/Application.cpp
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@ -4235,12 +4235,43 @@ bool Application::event(QEvent* event) {
}
bool Application::eventFilter(QObject* object, QEvent* event) {
auto eventType = event->type();
if (_aboutToQuit && event->type() != QEvent::DeferredDelete && event->type() != QEvent::Destroy) {
if (_aboutToQuit && eventType != QEvent::DeferredDelete && eventType != QEvent::Destroy) {
return true;
}
auto eventType = event->type();
#if defined(Q_OS_MAC)
// On Mac OS, Cmd+LeftClick is treated as a RightClick (more specifically, it seems to
// be Cmd+RightClick without the modifier being dropped). Starting in Qt 5.12, only
// on Mac, the MouseButtonRelease event for these mouse presses is sent to the top
// level QWidgetWindow, but are not propagated further. This means that the Application
// will see a MouseButtonPress, but no MouseButtonRelease, causing the client to get
// stuck in "mouse-look." The cause of the problem is in the way QWidgetWindow processes
// events where QMouseEvent::button() is not equal to QMouseEvent::buttons(). In this case
// QMouseEvent::button() is Qt::RightButton, while QMouseEvent::buttons() is (correctly?)
// Qt::LeftButton.
//
// The change here gets around this problem by capturing these
// pseudo-RightClicks, and re-emitting them as "pure" RightClicks, where
// QMouseEvent::button() == QMouseEvent::buttons() == Qt::RightButton.
//
if (eventType == QEvent::MouseButtonPress) {
auto mouseEvent = static_cast<QMouseEvent*>(event);
if (mouseEvent->button() == Qt::RightButton
&& mouseEvent->buttons() == Qt::LeftButton
&& mouseEvent->modifiers() == Qt::MetaModifier) {
QMouseEvent* newEvent = new QMouseEvent(
QEvent::MouseButtonPress, mouseEvent->localPos(), mouseEvent->windowPos(),
mouseEvent->screenPos(), Qt::RightButton, Qt::MouseButtons(Qt::RightButton),
mouseEvent->modifiers());
QApplication::postEvent(object, newEvent);
return true;
}
}
#endif
if (eventType == QEvent::KeyPress || eventType == QEvent::KeyRelease || eventType == QEvent::MouseMove) {
getRefreshRateManager().resetInactiveTimer();
}