On 25/01/2013, at 6:30 AM, Tae Won Ha <qva...@me.com> wrote: > Hi, guys. I need some help in event handling. I have a custom view embedded > in a scroll view which is embedded in a split view. The window has got a > toolbar. When I move the window down by dragging the toolbar, very often the > -mouseDragged: of my custom view gets invoked. Curiously enough, it does not > seem to happen when I drag the window up. My questions: > > - Why? > - When I NSLog() things, I see that -mouseDown: of the custom view is not > invoked. What's going on? > > It's the following file > > https://github.com/qvacua/qmind/blob/master/Qmind/QMMindmapView.m > > from line 706. > > I created a dummy project which has got a dummy -mouseDragged: implementation > inside a window with a toolbar. In the dummy project it does not happen at > all. > > I'm clueless. Am I missing something quite simple here? Anybody had similar > problems?
Yes, I've seen this happen sometimes - I believe it's a bug. You can mitigate it by examining the event that you get in the mouseDragged: method - if I recall correctly there is something different about the event that allows you to detect that it's the "wrong" one and ignore it, but I can't pinpoint the exact necessaries in my code, sorry. Another option is to forget about using mouseDragged: in your custom view and do everything from mouseDown:, including keeping control and fetching and handling events in a loop and do your dragging there. I'm finding that approach often simplifies things a lot and it means you can only fetch the events you need. --Graham _______________________________________________ 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
