GWT Cell树，怎么用？

有人可以解释如何使用GWT单元树。 我试图谷歌它但没有找到任何有价值的教程？

谢谢

Answer 1

尝试;

Google示例1

包括onModuleLoad方法。 🙂

Answer 2

对于那些不喜欢谷歌展示的例子，像我一样可以使用这个例子; http://google-web-toolkit.googlecode.com/svn/javadoc/2.1/com/google/gwt/user/cellview/client/CellTree.html

你可以复制粘贴它，它的工作原理。 “

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琐碎的例子

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public class CellTreeExample implements EntryPoint { /** * The model that defines the nodes in the tree. */ private static class CustomTreeModel implements TreeViewModel { /** * Get the {@link NodeInfo} that provides the children of the specified * value. */ public  NodeInfo getNodeInfo(T value) { /* * Create some data in a data provider. Use the parent value as a prefix * for the next level. */ ListDataProvider dataProvider = new ListDataProvider(); for (int i = 0; i < 2; i++) { dataProvider.getList().add(value + "." + String.valueOf(i)); } // Return a node info that pairs the data with a cell. return new DefaultNodeInfo(dataProvider, new TextCell()); } /** * Check if the specified value represents a leaf node. Leaf nodes cannot be * opened. */ public boolean isLeaf(Object value) { // The maximum length of a value is ten characters. return value.toString().length() > 10; } } public void onModuleLoad() { // Create a model for the tree. TreeViewModel model = new CustomTreeModel(); /* * Create the tree using the model. We specify the default value of the * hidden root node as "Item 1". */ CellTree tree = new CellTree(model, "Item 1"); // Add the tree to the root layout panel. RootLayoutPanel.get().add(tree); } } 

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