Roku Developer Program

[shaharbad]

So I'm building a channel using Brightscript, I'm facing an problem with accessing a particular variable thats located in another component, I checked online and I can't seem to understand how exactly should I do it, I tried using the global method but it doesnt work and i also tried import the script of the other file in the component xml file.

[philanderson777]

to expose one field from one component and to use it in another component, you have to add that field as an 'interface' and that exposes it as the equivalent of a public field in OOP programming

<component name="ThisComponent" extends="ThisNode">
  <interface>

    <field id="someName" type="boolean/string/assocArray" onChange="doThis" alwaysNotify="true" />

then you should be able to see it in the other component

thisComponent = createObject("ThisComponent")

thisComponent.someName="giveItAValueHere"

there is also a m.global object which you can add to, but these should be genuine global variables across the app.  

https://developer.roku.com/en-gb/docs/references/brightscript/interfaces/ifsgscreen.md

sub showChannelSGScreen()
  print "in showChannelSGScreen"
  screen = CreateObject("roSGScreen")
  m.port = CreateObject("roMessagePort")
  screen.setMessagePort(m.port)
  m.global = screen.getGlobalNode()
  m.global.id = "GlobalNode"
  m.global.addFields( {red: &hff0000ff, green: &h00ff00ff, blue: &h0000ffff} )
  scene = screen.CreateScene("TrivialScene")
  screen.show()
  scene.setFocus(true)

  child = createObject("RoSGNode","ContentNode")
  child.contentkey = "test_string"
  print "child: '"; child.contentkey; "'"

  while(true)
    msg = wait(0, m.port)
    msgType = type(msg)
    if msgType = "roSGScreenEvent"
      if msg.isScreenClosed() then return
    end if
  end while

end sub

which can be obtained in the app as m.global.red