From b077e67fd2538bc972eb5f050c7e0d28681a30ca Mon Sep 17 00:00:00 2001 From: Gabriel de Dietrich Date: Mon, 21 Jan 2013 15:23:26 +0100 Subject: Cocoa: Backport Qt 4's QCocoaView tracking areas into QNSView Task-number: QTBUG-29153 Change-Id: Ib190c074defaa459a8acc738f09af4a65e5d91d1 Reviewed-by: Richard Moe Gustavsen --- src/plugins/platforms/cocoa/qnsview.mm | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) (limited to 'src/plugins/platforms/cocoa') diff --git a/src/plugins/platforms/cocoa/qnsview.mm b/src/plugins/platforms/cocoa/qnsview.mm index 678f88baa0..5060d7dc25 100644 --- a/src/plugins/platforms/cocoa/qnsview.mm +++ b/src/plugins/platforms/cocoa/qnsview.mm @@ -472,6 +472,39 @@ static QTouchDevice *touchDevice = 0; [self handleMouseEvent:theEvent]; } +- (void)updateTrackingAreas +{ + [super updateTrackingAreas]; + + // [NSView addTrackingArea] is slow, so bail out early if we can: + if (NSIsEmptyRect([self visibleRect])) + return; + + QCocoaAutoReleasePool pool; + if (NSArray *trackingArray = [self trackingAreas]) { + NSUInteger size = [trackingArray count]; + for (NSUInteger i = 0; i < size; ++i) { + NSTrackingArea *t = [trackingArray objectAtIndex:i]; + [self removeTrackingArea:t]; + } + } + + // Ideally, we shouldn't have NSTrackingMouseMoved events included below, it should + // only be turned on if mouseTracking, hover is on or a tool tip is set. + // Unfortunately, Qt will send "tooltip" events on mouse moves, so we need to + // turn it on in ALL case. That means EVERY QCocoaView gets to pay the cost of + // mouse moves delivered to it (Apple recommends keeping it OFF because there + // is a performance hit). So it goes. + NSUInteger trackingOptions = NSTrackingMouseEnteredAndExited | NSTrackingActiveInActiveApp + | NSTrackingInVisibleRect | NSTrackingMouseMoved; + NSTrackingArea *ta = [[[NSTrackingArea alloc] initWithRect:[self frame] + options:trackingOptions + owner:self + userInfo:nil] + autorelease]; + [self addTrackingArea:ta]; +} + - (void)mouseMoved:(NSEvent *)theEvent { [self handleMouseEvent:theEvent]; -- cgit v1.2.3