/*
* Copyright 2009 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 {@link IndexedPanel}s that also allow insertions.
*/
public interface InsertPanel extends IndexedPanel {
/**
* Extends this interface with convenience methods to handle {@link IsWidget}.
*/
interface ForIsWidget extends InsertPanel, IndexedPanel.ForIsWidget {
void add(IsWidget w);
void insert(IsWidget w, int beforeIndex);
}
/**
* Adds a child widget to this panel.
*
* @param w the child widget to be added
*/
void add(Widget w);
/**
* Inserts a child widget before the specified index. If the widget is already
* a child of this panel, it will be moved to the specified index.
*
* @param w the child widget to be inserted
* @param beforeIndex the index before which it will be inserted
* @throws IndexOutOfBoundsException if <code>beforeIndex</code> is out of
* range
*/
void insert(Widget w, int beforeIndex);
}