Example usage for com.google.gwt.gen2.complexpanel.client FastTree addBeforeSelectionHandler

Introduction

In this page you can find the example usage for com.google.gwt.gen2.complexpanel.client FastTree addBeforeSelectionHandler.

Prototype

public HandlerRegistration addBeforeSelectionHandler(BeforeSelectionHandler<FastTreeItem> handler) 

Source Link

Usage

From source file:com.google.gwt.gen2.demo.fasttree.client.FastTreeDemo.java

License:Apache License

private Widget cancelEventTree() {
    final FastTree cancelEventTree = new FastTree();
    FastTreeItem firstBranch = cancelEventTree.addItem("Select Me!");
    firstBranch.addItem("No! Select Me!");
    firstBranch.addItem("No! Select Me!");
    firstBranch.addItem("No! Select Me!");
    FastTreeItem secondBranch = cancelEventTree.addItem("Don't Select me!");
    secondBranch.addItem("Not me!");
    secondBranch.addItem("Not me!");
    secondBranch.addItem("Not me!");

    cancelEventTree.addBeforeSelectionHandler(new BeforeSelectionHandler<FastTreeItem>() {
        public void onBeforeSelection(BeforeSelectionEvent<FastTreeItem> event) {
            if (!Window.confirm("Continue?")) {
                event.cancel();//  w  w  w  . j  a  v  a2s . c  o m
            }
        }
    });

    return cancelEventTree;
}

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