我需要帮助修改其中一个示例以启动 roScreen

Question

在 "Scene Graph XML Tutorial" 的示例 "Video List Markup" 中，当我 select 一个项目 "itemSelected" 时，我想重写 "playVideo" 所以它正在创建一个 roScreen所以我可以在上面画我自己的图像。可能吗？

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

  m.videolist = m.top.findNode("videoLabelList")
  m.videoinfo = m.top.findNode("infoLabel")
  m.videoposter = m.top.findNode("videoPoster") 
  m.video = m.top.findNode("exampleVideo")

  m.video.observeField("state", "controlvideoplay")

  m.readVideoContentTask = createObject("roSGNode", "ContentReader")
  m.readVideoContentTask.observeField("content", "showvideolist")
  m.readVideoContentTask.control = "RUN"   

  m.videolist.observeField("itemFocused", "setvideo")
  m.videolist.observeField("itemSelected", "playvideo")
end sub

Sub OnChangeXmlstringscene()
  m.readVideoContentTask.xmlstring = m.top.xmlstringscene
End Sub

sub showvideolist()
  m.videolist.content = m.readVideoContentTask.content
  m.videolist.setFocus(true)
end sub

sub setvideo()
  videocontent = m.videolist.content.getChild(m.videolist.itemFocused)
  m.videoposter.uri = videocontent.hdposterurl
  m.videoinfo.text = videocontent.description
  m.video.content = videocontent
end sub

sub playvideo()
  m.video.control = "play"
  m.video.visible = true
  m.video.setFocus(true)
end sub 

sub controlvideoplay()
  if (m.video.state = "finished") 
    m.video.control = "stop"
    m.videolist.setFocus(true)
    m.video.visible = false
  end if
end sub

function onKeyEvent(key as String, press as Boolean) as Boolean
  if press then
    if key = "back"
      if (m.video.state = "playing")
        m.video.control = "stop"
        m.videolist.setFocus(true)
        m.video.visible = false

        return true
      end if
    end if
  end if

  return false
end function

如果不行，我怎样才能将视频播放屏幕替换为允许我在上面绘制自己的 jpg 图片的屏幕？

Answer 1

roScreen 和其他 Roku SDK1 视觉组件通常与 SDK2（又名 RSG，"scene graph"）组件不兼容。

所以不，您不能（或者您不尝试）在 RSG 模式下使用 roScreen。

但是您可以通过向场景添加一个 Poster 节点来做您想做的事。

我需要帮助修改其中一个示例以启动 roScreen

I need help modifying one of the examples to start a roScreen

roku

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