Forum Discussion

5 Replies

  • RokuChristianL's avatar
    RokuChristianL
    Visitor
    10 years ago
    Hi Greg, it's possible to call an anonymous function that calls your function with parameters. Although it maybe be a bit troublesome it's just barely if it even is slower than calling it directly so it won't be noticeable at all. Please see the example below.

    ObserveField("MyField", "AnonymousFunction")

    Sub AnonymousFunction
    MyFunction(MyField) <-- <Function that I want to call with parameters>
    End Sub

    Notice that I use MyField as just an example parameter. In this case MyField would be changed to the parameter that I want to set off the Observer. If you need more than one parameter passed these can be achieved through things like using the global variable, registry (not recommended), etc.
  • EnTerr's avatar
    EnTerr
    Roku Guru
    10 years ago
    Hi RokuChristianL - and welcome to the forum!

    i don't think you understood the question, your answer does not relate to passing parameters to observer callback functions.
    Of course inside a function one can call another function with arguments, that's not the point.
    • NicholasStokes's avatar
      NicholasStokes
      Binge Watcher
      3 years ago


      I am running this file in task.xml

       

      <?xml version=“1.0” encoding=“utf-8" ?>
      <!-- Copyright 2016 Roku Corp. All Rights Reserved. -->
      <component name=“ContentReader” extends=“Task”>
      <script type=“text/brightscript”>
      <![CDATA[
      sub init()
      m.top.functionName = “getAPIResponse”
      end sub

      sub getAPIResponse()
      port = CreateObject(“roMessagePort”)
      request = CreateObject(“roUrlTransfer”)
      request.setRequest(“GET”)
      request.setURL(m.top.contenturi)
      jsonString = request.GetToString()
      jsonParsed = ParseJson(jsonString)
      m.top.content = jsonParsed
      end sub
      ]]>
      </script>
      </component>

       

      And Used this below function in main.brs file

       

      sub Main()
      print “in showChannelSGScreen”
      m.readXMLContentTask = createObject(“roSGNode”, “ContentReader”)
      m.readXMLContentTask.observeField(“content”, “setcontent”)
      m.readXMLContentTask.contenturi = “http://www.sdktestinglab.com/Tutorial/content/xmlcontent.xml”
      m.readXMLContentTask.control = “RUN”
      readData = m.top.content
      print “readData”
      end sub

      but this function is not executed in main.brs file
      Can you please help me to execute this function from main.brs Or provide the sample examples

      • renojim's avatar
        renojim
        Community Streaming Expert
        3 years ago

        NicholasStokes, I can't help you run the task from Main(), but there isn't any need to run a task from Main().  Just put the code from task.xml right in Main().  You can use roUrlTransfer in Main().  Also, please use code tags when posting code.  It makes it much, much, much easier to read.  To find it, you have to expand the toolbar above the edit box for your post and it looks like </>.

        sub Main()
   print “in showChannelSGScreen”
   port = CreateObject(“roMessagePort”)
   request = CreateObject(“roUrlTransfer”)
   url = "http://www.sdktestinglab.com/Tutorial/content/xmlcontent.xml"
   request.setURL(url)
   jsonString = request.GetToString()
   jsonParsed = ParseJson(jsonString)
end sub