Re: NSTrackingArea pending install
Re: NSTrackingArea pending install
- Subject: Re: NSTrackingArea pending install
- From: Michael Vannorsdel <email@hidden>
- Date: Fri, 11 Jun 2010 14:30:55 -0600
I had this happen a couple times when dealing with threading accidents. If the tracking rects are added from a secondary thread or the window is ordered front by a secondary thread, then the tracking areas will be stuck in a pending state. There's probably more reasons for this but these are the two I'm personally familiar with.
On Jun 11, 2010, at 1:42 PM, Rainer Standke wrote:
> Hello all,
>
> I have a subclassed NSImageView that is a drag source and a drag destination. I am trying to have an NSTrackingArea so that when the drag out of the image view leaves they window I can update the cursor to indicate deletion of the item - I am thinking of the cursor that looks like an explosion cloud.
>
> When I log my tracking area it tells me it's "pending install", and I never get any of the expected mouse-move messages.
>
> This snippet is in mouseDown on the image view:
>
> NSTrackingAreaOptions options = NSTrackingMouseEnteredAndExited | NSTrackingEnabledDuringMouseDrag | NSTrackingActiveAlways;
>
> NSTrackingArea *trkArea = [[NSTrackingArea alloc] initWithRect:[[self window] frame] options:options owner:self userInfo:nil];
>
> [self addTrackingArea:trkArea];
> [self updateTrackingAreas];
>
> NSLog(@"trkArea: %@", trkArea);
>
>
> I am running out of ideas what to try - any help would be appreciated.
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