Forum Discussion

fry19's avatar
fry19
Binge Watcher
6 years ago

fieldToInterp for a top level component

I am trying to extend the Poster component this way:   <?xml version="1.0" encoding="utf-8" ?> <component name="PosterWithFadeIn" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" extends="Pos...
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speechles's avatar
speechles
Roku Guru
6 years ago
<component name="PosterWithFadeIn" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" extends="Poster" xsi:noNamespaceSchemaLocation="http://rokudev.roku.com/rokudev/schema/RokuSceneGraph.xsd">

  <children>

    <Poster id="myPoster" loadheight="250" loadwidth="400" width="400" height="250" uri="" opacity="0.0" />

    <Animation
      id = "fadeIn"
      duration = "1"
      easeFunction = "linear" >

      <FloatFieldInterpolator
        key = "[ 0.0, 1.0 ]"
        keyValue = "[ 0.0, 1.0 ]"
        fieldToInterp = "myPoster.opacity" />

    </Animation>
  </children>

</component>

 


...

the in brs:

m.poster = m.top.findnode("MyPoster")
m.animation = m.top.findnode("fadeIn")
m.poster.uri = < uri >

then during times when you want the animation and the poster to show use this:
m.animation.control = "stop"
m.animation.control = "start"

stop it always before you start it. you can only start a stopped task.

  • fry19's avatar
    fry19
    Binge Watcher
    6 years ago

    speechlesUnfortunately this does not answer the question I am asking. The top component is already a Poster (<component ... extends="Poster"...>).

     

    In Brightscript I can simply access the "opacity" of the component by writing "m.top.opacity" and I want to access this very field in the animation. Not create another poster inside a Poster component.

     

    The solution you propose also has the issue that if you write <PosterWithFadeIn uri="xxxx"/> the attribute uri is applied to the main component, not the one you define inside (and that is true for every single attribute...). This is why I am extending from Poster...

     

    The question is to access the opacity field of the main component (or any other field for that matter) via the fieldToInterp attribute in the animation.

     

    • speechles's avatar
      speechles
      Roku Guru
      6 years ago
      <?xml version="1.0" encoding="utf-8" ?>

<component name="PosterWithFadeIn" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" extends="Poster" xsi:noNamespaceSchemaLocation="http://rokudev.roku.com/rokudev/schema/RokuSceneGraph.xsd">

  <interface>
          <field id="height" type="integer" value="0" alwaysNotify="true" onChange="OnChange" />
          <field id="width" type="integer" value="0" alwaysNotify="true" onChange="OnChange" />
          <field id="uri" type="integer" value="0" alwaysNotify="true" onChange="OnChange" />
          <field id="opacity" type="float" value="1.0" alwaysNotify="true" onChange="OnChange" />
          <field id="translation" type="array" value="[0, 0]" alwaysNotify="true" onChange="OnChange" />
        </interface>

  <children>

    <Poster id="idPoster" />

    <Animation
    id = "fadeIn"
    duration = "1"
    easeFunction = "linear" >

    <FloatFieldInterpolator
    key = "[ 0.0, 1.0 ]"
    keyValue = "[ 0.0, 1.0 ]"
    control="start"
    fieldToInterp = "idPoster.opacity" />

    </Animation>

  </children>

</component>

       

      Then in the BRS:

       

      Function OnChange()
    m.poster = m.top.findnode("idPoster")
    m.poster.height = m.top.height
    m.poster.width = m.top.width
    m.poster.opacity = m.top.opacity
    m.poster.uri = m.top.uri
          m.poster.translation = m.top.translation
End Function

       

      • fry19's avatar
        fry19
        Binge Watcher
        6 years ago

        speechlesThank you for your answers. I understand what you are trying to achieve and I agree with you that what you propose will work.

         

        But it is still not answering the question I am asking. The field of the top level component is accessible in Brightscript via "m.top.opacity".

         

        My question is: how do I access it from the Animation / fieldToInterp attribute.

         

        And maybe at the end of the day, the answer is that it is not possible. But this is the question I am asking. If it is not possible, then yes there are workarounds (like what you suggest, or implementing the interpolation via a timer which is what I did...), but I am interested to know if it is possible at all and if yes, how.