根节点必须缩放，因为在我的真实应用程序我使用全屏模式，我需要适合内容窗口分辨率。

Root node has to be scaled, becouse in my real app I use fullscreen mode and I need to fit content to window resolution.

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我们创建完整窗口来显示每个幻灯片，并取相关内容置入其中。

We create a full window to show every slide and fetch associated contents into it.

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清单7显示了窗口的内容。

Listing 7 shows the content for the window.

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