For whatever it's worth, I did not find a way to make the tracking area work. I do get the mouseEntered and mouseExited messages, but only after the dragging has ended - which is precisely when I don't need it any more.
Instead I use the method draggedImage:movedTo: out of the NSDraggingSource Protocol to decide if the mouse pointer is inside the view's window's rectangle, and I re-assign the cursor accordingly. This happens every time the mouse moves until the dragging session is over. Rainer On Jun 11, 2010, at 14:37 , Rainer Standke wrote: > It turns out that things work almost as expected - but not during the drag. > This flag seems to have no effect. > > I add the tracking area and then I have this: > > [self dragImage:dragImage at:dragImageCenter offset:NSMakeSize(0.0, 0.0) > event:theEvent pasteboard:pboard source:self slideBack:YES]; > > NSLog(@"trkArea 2: %@", trkArea); > > Oddly, the log only occurs after the dragging session is over. Does this mean > that the dragging session is taking over completely? I tried to add the > tracking area in the background and / or to perform the dragImage: method > after a delay - seems to make no difference in behavior... > Any clues as to what's going on? > > Thanks, > > Rainer > > On Jun 11, 2010, at 13:30 , Michael Vannorsdel wrote: > >> 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. >> >> _______________________________________________ >> >> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) >> >> Please do not post admin requests or moderator comments to the list. >> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >> >> Help/Unsubscribe/Update your Subscription: >> http://lists.apple.com/mailman/options/cocoa-dev/lists%40standke.com >> >> This email sent to li...@standke.com > > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/cocoa-dev/lists%40standke.com > > This email sent to li...@standke.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
