Roku Developer Program

[melev]

Ok, I have a very simple PosterGrid:

<PosterGrid
    id="main_menu"
    translation="[32,32]"
    basePosterSize="[640,270]"
    itemSpacing="[32,32]"
    numColumns="2"
    numRows="2">

    <ContentNode role = "content" >
        <ContentNode id="node_1" hdgridposterurl="pkg:/images/image_1.png" focusable="true"/>
        <ContentNode id="node_2" hdgridposterurl="pkg:/images/image_2.png" focusable="true"/>
        <ContentNode id="node_3" hdgridposterurl="pkg:/images/image_3.png" focusable="true"/>
        <ContentNode id="node_4" hdgridposterurl="pkg:/images/image_4.png" focusable="true"/>
    </ContentNode>
</PosterGrid>

What I want to do is process the OK key and get which node was clicked.

I read about roSGNodeEvent but I can't find any example on how to use this, documentation is very lacking. I have:

FUNCTION onKeyEvent(key as String, press as Boolean) as Boolean

    IF (press = false) THEN
         ' What do i put here? is there a way to access the roSGNodeEvent here?

         I want something that returns "node_X" depending on which Node the OK button was clicked.
    END IF

END FUNCTION

[renojim · Accepted solution]

In general, you don't process key presses, you set up observers on events.

Sub init()
    m.menu_grid = m.top.findNode("menu_grid")
    m.menu_grid.observeField("itemSelected","onPosterSelected")
    ...
End Sub

Sub onPosterSelected(obj as Object)
    ' m.menu_grid.itemSelected has the index number of the poster selected
    ' as does obj.GetData()
    ' do your stuff here
End Sub

This is a core concept of Scene Graph that you'll need to understand.

[melev]

Awesome! This is exactly what I needed, thanks a lot.

[gabak8]

To obtain information on which node triggered an event, you would typically cutting need access to the specific system or software that handles event tracking and logging.