To design a TreeViewer demo application, you must create your node class as your data model.

要设计TreeViewer演示应用程序，您必须创建节点类作为数据模型。

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First, we create one TreeViewer that can display NBA or MLB players according to your choice.

首先，创建一个可以根据选择显示NBA或MLB球员的TreeViewer。

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The idea is that a TreeViewer knows about the root element of the tree that it is going to display.

这里的想法是TreeViewer知道要显示的树的根元素。

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Just like the TreeViewer, it has an input (a root object), a content provider, and a label provider.

和TreeViewer一样，它有输入(根对象)、内容提供程序和标签提供程序。

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Then we set the desired layout of this tree and add the tree content provider and tree label provider instance to this TreeViewer.

然后设定此树的期望布局并向此TreeViewer中添加树内容提供程序和树标签提供程序实例。

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The TreeViewer doesn't talk to the domain objects directly. Instead, it uses another object called a ContentProvider, and this object uses your domain objects, as shown in Figure 7.

TreeViewer并不直接使用域对象 —而是使用另一个名为ContentProvider 的对象，这个对象才使用域对象，如图 7 所示。

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The TreeViewer doesn't talk to the domain objects directly. Instead, it uses another object called a ContentProvider, and this object uses your domain objects, as shown in Figure 7.

TreeViewer并不直接使用域对象 —而是使用另一个名为ContentProvider 的对象，这个对象才使用域对象，如图 7 所示。

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