'*************************************************************
'** Roku Xtream-ALL for XoceUnder                            *
'** Copyright (c)2024 XoceUnder.  All rights reserved.       *
'*************************************************************
sub Init()
    m.rowList = m.top.FindNode("rowList")
    m.rowList.SetFocus(true)
    ' label with item description
    m.descriptionLabel = m.top.FindNode("descriptionLabel")
    m.top.ObserveField("visible", "OnVisibleChange")
    ' label with item title
    m.titleLabel = m.top.FindNode("titleLabel")
    ' observe rowItemFocused so we can know when another item of rowList will be focused
    m.rowList.ObserveField("rowItemFocused", "OnItemFocused")
end sub

sub OnVisibleChange() ' invoked when GridScreen change visibility
    if m.top.visible = true
        m.rowList.SetFocus(true) ' set focus to rowList if GridScreen visible
    end if
end sub

sub OnItemFocused() ' invoked when another item is focused
    focusedIndex = m.rowList.rowItemFocused ' get position of focused item
    row = m.rowList.content.GetChild(focusedIndex[0]) ' get all items of row
    item = row.GetChild(focusedIndex[1]) ' get focused item
    ' update description label with description of focused item
    m.descriptionLabel.text = item.description
    ' update title label with title of focused item
    m.titleLabel.text = item.title
    ' adding length of playback to the title if item length field was populated
    if item.length <> invalid and item.length <> 0
        m.titleLabel.text += " | " + GetTime(item.length)
    end if
end sub