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    button optional data

    MoKaLuxMoKaLux Member
    edited August 2020 in General questions
    how are you doing?
    A question please. I am using the button class in a Sprite class. Can I pass extra data to my button?
    btn01:addEventListener("click", self.changeScene, data)
    btn01:addEventListener("click", self.changeScene, self, data)
    https://wiki.giderosmobile.com/index.php/EventDispatcher:addEventListener

    Basically I want to avoid doing this for all my buttons:
    btn02:addEventListener("click", function()
	playSfx(true)
	sceneManager:changeScene("levels", 1, transitions[13], easings[7])
end)
    Thank you :)
    my growING GIDEROS github repositories: https://github.com/mokalux?tab=repositories
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    Comments

    • hgy29hgy29 Maintainer
      Accepted Answer
      You can assign your custom data to the button itself, and fetch the clicked button from the event.
      btn01.data={ ... }
function Class:changeScene(evt)
 local data=evt:getTarget().data
 ...
end

      Likes: MoKaLux

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    • MoKaLuxMoKaLux Member
      Thank you hgy29, as we say in french "oui mais non" :)
      This is a way of doing it but it adds another variable to the code.

      I was hoping to get something like:
      EventDispatcher:addEventListener(type,listener,data)

      An example in the wiki could be useful.

      I'll see if I can figure out something.
      my growING GIDEROS github repositories: https://github.com/mokalux?tab=repositories
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    • keszeghkeszegh Member
      Accepted Answer
      yes, i also had cases when i wanted to send multiple data for an event and maybe even we had discussions on the forum about it but as far as i can remember there was no perfect solution.

      Likes: MoKaLux

      Longtitle Productions, creator of
      Fragmenter - animated loop machine and IKONOMIKON - the memory game
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    • hgy29hgy29 Maintainer
      Yes, I know, the best way to do it I can think of would be to change Gideros code so that
      addEventListsner(event,handler,data)
      would become
      addEventListerner(event,handler,...)
      and add the necessary
      table.unpack()
      before calling the handler

      Likes: keszegh, MoKaLux

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    • MoKaLuxMoKaLux Member
      edited August 2020
      one last thing please :)
      do you have a very basic example for data?

      EventDispatcher:addEventListener(type,listener,data)
      for the wiki: https://wiki.giderosmobile.com/index.php/EventDispatcher:addEventListener
      my growING GIDEROS github repositories: https://github.com/mokalux?tab=repositories
      +1 -1Share on Facebook
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