Hi Simon, I've run into that same issue with osgWidget. I was removing a widget when the user clicked on it, and osgWidget was trying to send a mouse up event to the newly deleted widget. I ended up just keeping the widgets around in a higher level manager class so they would still exist, but I think using a ref_ptr for _lastEvent in osgWidget would be a decent solution.
Thanks, Jason On Thu, Jul 2, 2009 at 4:17 AM, Simon Notheis <[email protected]> wrote: > Hi Robert, > > sorry for my late reply, but your posting didn't make it to the gmane > newsgroup which I am using. So I'll give the forum a try :-) > > I didn't modify the OSG code because we're using various installations here > (windows and linux). The WindowManager has a memeber > EventInterface* _lastEvent which tracks the last EventInterface (i.e. > Widget) that received a mouse event (ENTER, PUSH, ....). > > If a new mouse event is received, the WindowManager checks if he should > send a mouse LEAVE event to the widget stored in _lastEvent. > > What I do, is that I initially focus the widgets/menus via mouse, but then > use keyboard interaction to select items and that interaction my replace all > widgets in the menu list by new ones. So when I after that move the mouse > again, WindowManager tries to send a mouse LEAVE to _lastEvent which at that > mpoint may be an invalid pointer. > > So my idea was to just use osg::ref_ptr<EventInterface> _lastEvent instead > and do some additional _lastEvent.valid() checks. But since I'm not too > familiar with the internals of the WindowManager I don't know exactly what > implications this would have. > > In our own code, we are just forwarding the WindowManagers mouse and > keyboard event to our own listener classes, so I just added a ref_ptr there, > so that I have a "backup" of the original widget that is stored in > WindowManager::_lastEvent so that the WM can call whatever function he > wants. > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=14805#14805 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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