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Cocoa: Properly remove content view from its superview in setNSWindow()

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-[NSWindow setContentView:] doesn't make assupmtions about where that
view comes from, and just attaches it to the window. We need to make
sure we detach it from its previous window by calling -[NSView
removeFromSuperview], or the previous NSWindow may keep references to
the view. This can be an  issue if the view is deleted right after.

Task-number: QTBUG-39628
Change-Id: I152dedcb64ac044d8ca290c9996b388809e2477b
Reviewed-by: Timur Pocheptsov <Timur.Pocheptsov@digia.com>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@digia.com>
This commit is contained in:
Gabriel de Dietrich 2014-09-22 14:55:04 +02:00
parent e66a878838
commit abde2a59c6
1 changed files with 4 additions and 0 deletions
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4
src/plugins/platforms/cocoa/qcocoawindow.mm
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@ -1477,7 +1477,11 @@ void QCocoaWindow::setNSWindow(QCocoaNSWindow *window)
{
if (window.contentView != m_contentView) {
[m_contentView setPostsFrameChangedNotifications: NO];
[m_contentView retain];
if (m_contentView.superview) // m_contentView comes from another NSWindow
[m_contentView removeFromSuperview];
[window setContentView:m_contentView];
[m_contentView release];
[m_contentView setPostsFrameChangedNotifications: YES];
}
}