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iOS: Cancel any active touches when destroying a QIOSWindow

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Keeps the internal state of QtGui sane when it comes to which buttons
are active, etc.

Change-Id: Ic63e74d2546469e085ec46b74f4cf159dd409b07
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@digia.com>
This commit is contained in:
Tor Arne Vestbø 2013-11-07 13:16:48 +01:00 committed by The Qt Project
parent 59be0509e0
commit ac7823129a
1 changed files with 13 additions and 1 deletions
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14
src/plugins/platforms/ios/qioswindow.mm
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@ -226,6 +226,9 @@
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
if (!touches && m_activeTouches.isEmpty())
return;
if (!touches) {
m_activeTouches.clear();
} else {
@ -238,9 +241,11 @@
m_nextTouchId = 0;
NSTimeInterval timestamp = event ? event.timestamp : [[NSProcessInfo processInfo] systemUptime];
// Send cancel touch event synchronously
QIOSIntegration *iosIntegration = static_cast<QIOSIntegration *>(QGuiApplicationPrivate::platformIntegration());
QWindowSystemInterface::handleTouchCancelEvent(m_qioswindow->window(), ulong(event.timestamp * 1000), iosIntegration->touchDevice());
QWindowSystemInterface::handleTouchCancelEvent(m_qioswindow->window(), ulong(timestamp * 1000), iosIntegration->touchDevice());
QWindowSystemInterface::flushWindowSystemEvents();
}
@ -342,6 +347,13 @@ QIOSWindow::QIOSWindow(QWindow *window)
QIOSWindow::~QIOSWindow()
{
// According to the UIResponder documentation, Cocoa Touch should react to system interruptions
// that "might cause the view to be removed from the window" by sending touchesCancelled, but in
// practice this doesn't seem to happen when removing the view from its superview. To ensure that
// Qt's internal state for touch and mouse handling is kept consistent, we therefor have to force
// cancellation of all touch events.
[m_view touchesCancelled:0 withEvent:0];
[m_view removeFromSuperview];
[m_view release];
}