com.google.gwt.user.client.ui.HasOneWidget Maven / Gradle / Ivy
/*
* Copyright 2010 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.user.client.ui;
/**
* Implemented by panels that have only one widget.
*
* @see SimplePanel
*/
public interface HasOneWidget extends AcceptsOneWidget {
/**
* Gets the panel's child widget.
*
* @return the child widget, or null if none is present
*/
Widget getWidget();
/**
* Sets this panel's widget. Any existing child widget will be removed.
*
* @param w the panel's new widget, or null to clear the panel
*/
void setWidget(Widget w);
}