GWT cell tree how to use?

Question

Can someone explain how to use the GWT cell tree. I am trying to do this, but not find a valuable tutorial.

thanks

Answer 1

Try

Google example

includes the onModuleLoad method. :)

Answer 2

For those who don't like the Google Storefront example, for example, I can use this example; http://google-web-toolkit.googlecode.com/svn/javadoc/2.1/com/google/gwt/user/cellview/client/CellTree.html

you can just copy it and it works. "

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Trivial example

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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 <T> NodeInfo<?> getNodeInfo(T value) { /* * Create some data in a data provider. Use the parent value as a prefix * for the next level. */ ListDataProvider<String> dataProvider = new ListDataProvider<String>(); 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<String>(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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