/**
* Copyright (C) 2011 Brian Ferris <bdferris@onebusaway.org>
*
* 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 org.onebusaway.webapp.gwt.common.widgets;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.ui.ComplexPanel;
import com.google.gwt.user.client.ui.Widget;
public abstract class AbstractElementPanel extends ComplexPanel {
/**
* Creates an empty flow panel.
*/
public AbstractElementPanel() {
setElement(createElement());
}
/**
* Adds a new child widget to the panel.
*
* @param w the widget to be added
*/
@Override
public void add(Widget w) {
super.add(w, getElement());
}
/**
* Inserts a widget before the specified index.
*
* @param w the widget to be inserted
* @param beforeIndex the index before which it will be inserted
* @throws IndexOutOfBoundsException if <code>beforeIndex</code> is out of
* range
*/
public void insert(Widget w, int beforeIndex) {
super.insert(w, getElement(), beforeIndex, true);
}
protected abstract Element createElement();
}