casey duncan: thanks for suggestion. i will try adding a print statement after i dispatch the event and see if it prints as expected. also, thanks for clarifying how events are dispatched/handled... i thought that was how it worked, but given the problem i'm facing i started questioning my understanding of it.
Ø On Dec 21, 1:39 pm, Casey Duncan <[email protected]> wrote: > If on_added() was getting called multiple times recursively, You would > see 'on_added' printed to the screen a slew of times and then you > would get an error that the max recursion depth was exceeded. Main's > on_added event handler should only get called when you dispatch the > event directly on main or another event dispatcher that main has been > pushed onto (using push_handlers(), etc). > > It might be useful to add a print statement after the > child.dispatch_event() call in classB.addChild to see if that > statement finishes and is called the expected number of times. > > -Casey > > On Mon, Dec 21, 2009 at 12:35 PM, omcginnis <[email protected]> wrote: > > So I'm a little confused about how the EventDispatcher works... > > perhaps someone can clue me in. Here goes... > > > Assume the following: > > > classA(EventDispatcher): > > def __init__(self): > > ...code.. > > classA.register_event_type('on_added') > > > classB(classA): > > def __init__(self): > > classA.__init__(self) > > ...code... > > > def addChild(self, child): > > child.dispatch_event('on_added') > > > class Main(classB): > > def __init__(self): > > ...code... > > > def on_added(self): > > print 'on_added' > > # offending code > > child = classB() > > self.addChild(child) > > > class App(object): > > def __init__(self, main): > > root = classB() > > root.addChild(main) > > > app = App(Main()) > > > When I run this app 'on_added' prints to the console and then > > everything freezes and I have to force quit. I can only guess that I'm > > mixed up on how the EventDispatcher works. I'm guessing that my > > on_added handler is getting triggered a second time when I create > > another child element and add it, but I'm not positive. What I'm > > unclear on is when the on_added handler get's triggered. Will Main's > > on_added handler get triggered anytime any instance of classB > > dispatches an 'on_added' event? I thought that I could get away with > > the handler only being triggered when self dispatches the event... is > > that not the case? > > > Basically I'm trying to implement a simple parent/child relationship > > between objects. Ideally, when Main get's added to root I'd expect > > Main's on_added handler to get called. And when child get's added to > > Main (in the on_added handler) I'd expect nothing to happen b/c I > > haven't implemented a handler for 'on_added' events being dispatched > > by child. Thanks in advance... > > > -- > > > You received this message because you are subscribed to the Google Groups > > "pyglet-users" group. > > To post to this group, send email to [email protected]. > > To unsubscribe from this group, send email to > > [email protected]. > > For more options, visit this group > > athttp://groups.google.com/group/pyglet-users?hl=en. -- You received this message because you are subscribed to the Google Groups "pyglet-users" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/pyglet-users?hl=en.
