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kernfamily4
Topic Author
Posts: 6
Joined: Wed Nov 02, 2016 6:50 am

Setting values for interface fields

Wed Nov 02, 2016 7:40 am

New developer here... This should be easy for someone with experience

I'm creating a new field in an interface tag and trying to set the value before I run the object. I print the field inside the object and it is always empty. It is as if the field is READONLY from outside the object. Here is some test code from the final ScreenGraph tutorial

Near the top of TutorialPanelSetScene.xml I have inserted this line of code:

    sub init()
      print "Init ()"
      m.top.backgroundURI = "pkg:/images/rsgde_bg_hd.jpg"

      m.readContentTask = createObject("roSGNode", "ContentReader")
      m.readContentTask.observeField("content", "setcategories")
      m.readContentTask.contenturi = "http://www.sdktestinglab.com/Tutorial/content/categoriescontent.xml"
      m.readContentTask.test = "TEST"
      m.readContentTask.control = "RUN"
    end sub

In ContentReader.xml I have added this code:

  <interface>
    <field id = "contenturi" type = "uri" />
    <field id = "test" type = "string" />
    <field id = "content" type = "node" />
  </interface> 

and this code:

    sub getcontent()
       print "in ContentReader getcontent()"
       print "m.top.contenturi is " m.top.contenturi
       print "m.top.test is " m.top.test
       ...

In my Telnet session this is what I get:

   in ContentReader getcontent()
   m.top.contenturi is http://www.sdktestinglab.com/Tutorial/c ... dsgrid.xml
   m.top.test is

What am I missing here? I set it up just like the "contenturi" and the value assigned to it is passed whereas the value assigned to "test" is not.

Thank you and please also include where I can find the documentation that explains your answer.

Curtis
 
EnTerr
** Valued Community Member **
Posts: 3834
Joined: Sun Jan 02, 2011 2:41 am

Re: Setting values for interface fields

Wed Nov 02, 2016 9:58 am

What firmware# is that? Sometimes due to race conditions assignments between threads may fail, though i doubt this is your case.
Follow the adage "divide and conquer", e.g. put a print right after assignment and so on, till you narrow where the issue happens
      m.readContentTask.test = "TEST"
      ? "checking on m.readContentTask.test", m.readContentTask.test
 
kernfamily4
Topic Author
Posts: 6
Joined: Wed Nov 02, 2016 6:50 am

Re: Setting values for interface fields

Wed Nov 02, 2016 11:04 am

Roku Stick 3500X
Software Builld 7.2.0 4100-09

Actually I did try printing the value right after assignment and the value is there, but in the task the value is still missing. I must be doing something really dumb.
Thanks for your assistance.
 
EnTerr
** Valued Community Member **
Posts: 3834
Joined: Sun Jan 02, 2011 2:41 am

Re: Setting values for interface fields

Wed Nov 02, 2016 11:14 am

and what if you dump the whole node, not individual fields?
just do "? m.top" in getContent(). scrutinize the list of fields.
also try different name than "test" (sanity check)
 
kernfamily4
Topic Author
Posts: 6
Joined: Wed Nov 02, 2016 6:50 am

Re: Setting values for interface fields

Wed Nov 02, 2016 1:45 pm

Wait a minute. Scratch everything older than this post. I did what you said and got the same results, but when i scrolled up I noticed there were two sets of printouts from the Task. The first set had the fields filled in. Evidently the example creates another instance somewhere else and calls the task where I have not set the "test" value. That's what I get for trying to recreate an issue in the example code. I thought everyone would be more familiar with the example code.

So I returned the code that I am writing, put in similar print statements, and found that my Task object is getting fired when I do the CreateObject before I fill in the fields. So the question is what would make the Task fire before I set the  Control field to "RUN"?

Here is the code in the calling procedure:
Sub Init()
   Print "***************************************"
   Print "CountrysideMainScene.Init ()"
   
   m.top.backgroundURI = "pkg:/images/rsgde_bg_hd.jpg"
   
   '** Create Countryside API object
   Print "*****Before Create"
   m.GetData = createObject ("roSGNode", "APICountryside")
   Print "*****After Create"

   '** Get Filter Data
   Print "======================================="
   m.GetData.RequestType = "FilterData"
   m.GetData.MediaItem   = "TEST"
   Print "m.GetData -----------------------------"
   ? m.GetData
   
   m.GetData.Control = "RUN"
   If m.GetData.ReturnCode <> 1
      Print "Error retrieving Filter Data " m.GetData.ReturnCode
      'Return
   End If

Here is the code in the Task procedure:
<component name = "APICountryside" extends = "Task" >

   <interface>
      <field id = "RequestType" type = "string" />
      <field id = "MediaItem" type = "string" />
      <field id = "ReturnCode"  type = "integer" />
   </interface> 

And

Sub Init()
   Print "***************************************"
   Print "APICountryside.Init ()"
   Print "Request Type: " m.top.RequestType
   Print "Media Item "    m.top.MediaItem
   Print "m.top ---------------------------------"
   ? m.top
   
   If m.top.RequestType = "FilterData"
      m.top.functionName = "GetFilterData"
   Else
      Print "Invalid Request Type: " m.top.RequestType
      m.top.ReturnCode = -1
   End If
   
End Sub

Here are the Results:
(Notice the "After Create" is below the data from the Task)

***************************************
CountrysideMainScene.Init ()
*****Before Create
***************************************
APICountryside.Init ()
Request Type:
Media Item
m.top ---------------------------------
<Component: roSGNode> =
{
    functionName:
    control: init
    state: init
    change: <Component: roAssociativeArray>
    focusable: false
    focusedChild: <Component: roInvalid>
    id:
    MediaItem:
    RequestType:
    ReturnCode:  0
}
Invalid Request Type:
*****After Create
=======================================
m.GetData -----------------------------
<Component: roSGNode> =
{
    functionName:
    control: init
    state: init
    change: <Component: roAssociativeArray>
    focusable: false
    focusedChild: <Component: roInvalid>
    id:
    MediaItem: TEST
    RequestType: FilterData
    ReturnCode: -1
}
Error retrieving Filter Data -1

If you have any ideas they would be greatly appreciated. In the mean time I am going to cut down my code to do nothing but call an empty task and build it up from there. 
 
kernfamily4
Topic Author
Posts: 6
Joined: Wed Nov 02, 2016 6:50 am

Re: Setting values for interface fields

Wed Nov 02, 2016 3:49 pm

Issue Resolved. 
I misinterpreted the purpose of the Init function in the task. It is supposed to run when the object is created. The FunctionName that it sets is what gets triggered when the Control field is set to RUN. I made the mistake of trying to call the main part of the task in the Init function.

Thanks for getting me thinking.
 
EnTerr
** Valued Community Member **
Posts: 3834
Joined: Sun Jan 02, 2011 2:41 am

Re: Setting values for interface fields

Wed Nov 02, 2016 5:14 pm

Quite. 
"Init" is the object initializer (post-constructor).
Running a task causes a new run-thread to be spawned, stealing "m" for it and leaving a depleted copy behind.
 
sparkerman
Posts: 28
Joined: Wed Sep 02, 2015 1:03 pm

Re: Setting values for interface fields

Thu Apr 13, 2017 12:39 pm

how would you read the xml file if it was located in your components folder? My private channel does not require internet access so the xml files need to be local.
Thanks
 
piyushg098
Posts: 3
Joined: Mon Sep 04, 2017 11:46 pm

Re: Setting values for interface fields

Thu Sep 07, 2017 12:44 am

was this issue resolved? I am also facing this issue.
 
joetesta
Posts: 506
Joined: Wed Apr 20, 2011 11:48 am

Re: Setting values for interface fields

Thu Sep 07, 2017 11:15 am

piyushg098 wrote:
was this issue resolved? I am also facing this issue.

which of the two issues mentioned above are you referring?  Maybe start a new topic and link to this one.  The first guy figured out his problem, the second guy jacked the thread with a totally off topic post.
aspiring

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