stage events

GregBUG · January 2012

hi guys...

when subclassing the Sprite class and registering Event.ENTER_FRAME

from the documentation:
"Event.ENTER_FRAME event is dispatched to all Sprite instances no matter these instances are on the scene tree or not."

is there a way to avoid this?

atilim · January 2012

Here is the solution

MySprite = gideros.class(Sprite)
 
function MySprite:init()
  self:addEventListener(Event.ADDED_TO_STAGE, self.onAddedToStage, self)
  self:addEventListener(Event.REMOVED_FROM_STAGE, self.onRemovedFromStage, self)
end
 
function MySprite:onAddedToStage()
  self:addEventListener(Event.ENTER_FRAME, self.onEnterFrame, self)
end
 
function MySprite:onRemovedFromStage()
  self:removeEventListener(Event.ENTER_FRAME, self.onEnterFrame, self)
end
 
function MySprite:onEnterFrame()
end

GregBUG · January 2012

oh... thanks...

i'm cleanig the "raw" code of gidhelix and try to optimize more...
but i need to better understand how Gideros manages events...
and execution flow of lua sources... (and Lua oop) :P

sorry form my continuos silly questions...

but i'm new to Lua and Gideros

atilim · January 2012

Please ask anything

GregBUG · January 2012

@atilim

1^st thanks for your code. it work fine

but with this code i need to remove the sprite to the stage to stop it's events
in my situation i need to leave the sprites on the stage but i would stop all events...

i need to declare and raise an "user" event right?

atilim · January 2012

There isn't a direct way to stop/remove all events. You should remove each event you want by calling removeEventListener. Just leave the sprite on the stage, but call removeEventListener with the exact parameters of addEventListener.

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