/*
* Copyright 2008 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.examples;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.LazyPanel;
import com.google.gwt.user.client.ui.PushButton;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.Widget;
public class LazyPanelExample implements EntryPoint {
private static class HelloLazyPanel extends LazyPanel {
@Override
protected Widget createWidget() {
return new Label("Well hello there!");
}
}
public void onModuleLoad() {
final Widget lazy = new HelloLazyPanel();
// Not strictly necessary, but keeps the empty outer div
// from effecting layout before it is of any use
lazy.setVisible(false);
PushButton b = new PushButton("Click me");
b.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
lazy.setVisible(true);
}
});
RootPanel root = RootPanel.get();
root.add(b);
root.add(lazy);
}
}