sorry, replace event_handler_instance. with event_dispatcher_instance.
On Tue, Mar 10, 2015 at 10:52 PM, claudio canepa <ccanep...@gmail.com>
wrote:
>
>
> On Tue, Mar 10, 2015 at 6:09 PM, Brandon Keith Biggs <
> brandonkeithbi...@gmail.com> wrote:
>
>> Hello,
>> I can't quite figure out how this class works.
>> I see under remove_handler:
>> The given event handler is removed from the first handler stack frame it
>> appears in.
>> OK, so the stack is split into frames? How do I make one of the frames?
>>
>
> Each event_handler_instance.push_handlers(...) creates a frame
>
> When I make a frame, can I add several objects with the same event type?
>> Like 3 screen objects with the on_key_press method?
>>
>
> No. Each frame accepts only one handler per event.
> So, for 3 screen objects that want to handle on_key_press, you need three
> frames, by example with
> window.push_handlers(on_key_press=obj1.on_key_press)
> window.push_handlers(on_key_press=obj2.on_key_press)
> window.push_handlers(on_key_press=obj3.on_key_press)
>
> Last pushed will be called first by pyglet.
>
> The return of each handler will tell pyglet if the event needs further
> propagation
>
>
>> How do I remove an item from that frame?
>>
>
> You cannot specify the frame for deletions. The stack will be inspected
> from the top searching for a match; first match will be deleted.
> Following the prev example, you can do
>
> window.remove_handler("on_key_press", obj2.on_key_press)
>
> that will remove the obvious handler from the second frame in the stack.
>
> How do I remove the whole frame, even though there may be several items on
>> that frame?
>>
>
> event_handler_instance.pop_handlers() will remove the top frame in the
> stack
>
>
>> What is the difference between push_handlers and set_handlers?
>>
>
> push_handlers creates a frame in the top of the stack, and if any handler
> was specified they are added to this newly created frame.
>
> set_handlers adds / replaces handlers into the frame at the top of the
> stack (if the stack is empty it creates a new frame)
>
>
>> Sorry, but the documentation is not very clear and creating
>> screens/frames is how I like to layout my games.
>> thanks,
>>
>> --
>> <http://www.brandonkeithbiggs.com/>
>>
>
> hth
>
>
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