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chaklasiyanikun's avatar
chaklasiyanikun
Roku Guru
6 years ago
Solved

Inside a task node open a dialogbox in Roku

I know task node works like thread and not support dialog inside a task node. But, Is there any way to open a dialog box inside a task node. I also used getparent(). But no luck. my code is below. ...
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  • NB_'s avatar
    NB_
    6 years ago
    chaklasiyanikun wrote:

    ...

    Here give me a warning not to exist dialog field. Is there any other option for this?

    seems to me you were on the right track, since wanting to display a modal dialog and that is easy to do using the .dialog field of the Scene. So you just have to grab the scene with getScene(). 

    i'd do something like this: 

        dlg = createObject("roSGNode", "Dialog")
    port2 = createObject("roMessagePort")
    dlg.observeField("buttonSelected", port2)
    dlg.observeField("wasClosed", port2)

    dlg.title = "Warning"
    dlg.message = "Not a valid URL request"
    dlg.buttons = ["OK"]
    
    dlg.getScene().dialog = dlg                  
    while wait(0, port2) = invalid
        ' pass
    end while
    dlg.close = true 'out of propriety

     

necrotek's avatar
necrotek
Roku Guru
6 years ago

A task node is not rendered so a dialog would not be visible if you could open a dialog box. If you would like a dialog to be displayed in your visibly rendered scene, you can observe a field in the task to trigger displaying a dialog.

chaklasiyanikun's avatar
chaklasiyanikun
Roku Guru
6 years ago

I used both different files for both nodes. Task and scene. I used AppendChild() in a scene node to append a task node. I do not understand your answer clearly. But I think you saying like below. I will create a dialog in the scene node and also fire one trigger at the time of I append child. at the time of start trigger dialog visibility false and at time of m.req.asynccancel() visibility true. But Inside a Task node does not support m.top.dialog. The main thing is I am not able to access m.req.asynccancel() value in parent node(It's a scene). So, using this value I open dialog in the scene node. and Inside a Task node, I write an m.top.dialog But It gives an error. "dialog field doesn't exist".

  • necrotek's avatar
    necrotek
    Roku Guru
    6 years ago

    I don't think you would want to  append a scene to a task.

     

    Something like this pseudo code

    In your task.xml create

    <interface> <field id="isCanceled" type ="boolean" alwaysnotify="true"> </interface>

    In the Task logic function asyncCheck() : if asyncfail then m.top.isCanceled=true: end function 

    In your scene logic 

    myTask = TheTask

    myTask.observefield("isCanceled", "onCanceled:)

    mytask.control="RUN"

     

    function onCanceled(event)

       canceled=event.getdata()

       if canceled=true then doDialog()

    end function 

     

    • chaklasiyanikun's avatar
      chaklasiyanikun
      Roku Guru
      6 years ago

      I used a task node like below. Inside a scene node

      m.loginscreen = CreateObject("roSGNode", "Login")
m.loginscreen.observefield("isCanceled", "onCanceled")
m.top.appendChild(m.loginscreen)

      and create a oncanceled Function like below.

      function onCanceled(event)
?"call onCanceled Event"
canceled=event.getdata()
if canceled=true then
      doDialog()
end if
end function

      and in the XML file like this,

      <field id="isCanceled" type ="boolean" alwaysnotify="true"/>

      my task node logic

      else 
        m.req.asynccancel()
  ' Here I tried to print a dialog box
        m.top.isCanceled = true
        ?"m.top.isCanceled : " m.top.isCanceled
      end if

      and task node XML file write

      <field id="isCanceled" type ="boolean" alwaysnotify="true"/>

      But Here, one time call roURLTransfer  and if status code is not 200 it go to else part and m.top.isCanceled call. But I'm not able to access m.top.isCanceled value in the scene node. First-time call while loop m.top.isCanceled : true this value in task node. and second time call while loop. It's gave error on msg = Wait(0, m.port) timeout. I think it's a problem with I append child. But I do not find any way to child node access in a parent.

    • chaklasiyanikun's avatar
      chaklasiyanikun
      Roku Guru
      6 years ago

      I used a task node like below. Inside a scene node

      m.loginscreen = CreateObject("roSGNode", "Login")
m.loginscreen.observefield("isCanceled", "onCanceled")
m.top.appendChild(m.loginscreen)

      and create a oncanceled Function like below.

      function onCanceled(event)
?"call onCanceled Event"
canceled=event.getdata()
if canceled=true then
      doDialog()
end if
end function

      and in the XML file like this,

      <field id="isCanceled" type ="boolean" alwaysnotify="true"/>

      my task node logic

      else 
        m.req.asynccancel()
  ' Here I tried to print a dialog box
        m.top.isCanceled = true
        ?"m.top.isCanceled : " m.top.isCanceled
      end if

      and task node XML file write

      <field id="isCanceled" type ="boolean" alwaysnotify="true"/>

      But Here, one-time call roURLTransfer and if status code is not 200 it goes to else part and m.top.isCanceled call. But I'm not able to access m.top.isCanceled value in the scene node. First-time call while loop m.top.isCanceled : true this value in task node. and second time call while loop. It's gave error on msg = Wait(0, m.port) timeout. I think it's a problem with I append child. But I do not find any way to child node access in a parent.

      • necrotek's avatar
        necrotek
        Roku Guru
        6 years ago

        Your login task is in a different scope than your scene you cannot access loginscreen m.top.isCanceld from the scene even though it is appended. That is why you need the observefield() from your scene to trigger your dialog. You might try setting the observer after appending logginscreen. Scene cannot observe a field that is not a child.  If you are having a timeout on your msg=wait(0,m.port), that might be a different issue. are you successfully retrieving data is it is 200?

        Here is Roku sample code for the basics

        https://github.com/rokudev/samples/tree/master/ux%20components/control/TaskExample