/**
* 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 org.waveprotocol.wave.client.widget.toolbar;
import org.waveprotocol.wave.client.widget.toolbar.buttons.ToolbarButtonView;
/**
* An item in a submenu, which notifies its "parent" of actions (i.e. a
* propagated click) and changes to state (i.e. enabled / disabled / made
* invisible).
*
* @author kalman@google.com (Benjamin Kalman)
*/
public interface SubmenuItem {
/**
* A parent of the item; notified of child events.
*/
interface Parent {
/**
* Notifies the parent that an action was performed.
*/
void onActionPerformed();
/**
* Notifies parent that one of its child items has changed its property.
*/
void onChildStateChanged(SubmenuItem item, ToolbarButtonView.State newState);
}
/**
* Sets the parent of this hierarchical item.
*/
void setParent(Parent parent);
/**
* Clears the parent of this hierarchical item.
*/
void clearParent();
}