/**
* Copyright 2006 Webmedia Group Ltd.
*
* 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.araneaframework.uilib.core;
import org.araneaframework.Component;
import org.araneaframework.InputData;
import org.araneaframework.Widget;
import org.araneaframework.core.EventListener;
import org.araneaframework.core.StandardEventListener;
import org.araneaframework.framework.container.StandardFlowContainerWidget;
import org.araneaframework.uilib.MenuContext;
/**
* @author Taimo Peelo (taimo@webmedia.ee)
*/
public abstract class StandardMenuWidget extends StandardFlowContainerWidget implements MenuContext {
public static final String MENU_VIEWDATA_KEY = "menu";
public static final String MENU_SELECT_EVENT_KEY = "menuSelect";
protected MenuItem menu;
protected Class topWidgetClass;
// CONSTRUCTOR
public StandardMenuWidget(Widget topWidget) throws Exception {
super(topWidget);
topWidgetClass = topWidget.getClass();
menu = buildMenu();
addEventListener(StandardMenuWidget.MENU_SELECT_EVENT_KEY, new ItemSelectionHandler());
putViewData(StandardMenuWidget.MENU_VIEWDATA_KEY, menu);
}
// MENU SELECTION LISTENER
private class ItemSelectionHandler extends StandardEventListener {
public void processEvent(Object eventId, String eventParam, InputData input) throws Exception {
StandardMenuWidget.this.selectMenuItem(eventParam);
}
}
public void selectMenuItem(String menuItemPath) throws Exception {
Component newFlow = menu.selectMenuItem(menuItemPath);
if (newFlow == null)
replace((Component) topWidgetClass.newInstance(), null);
else {
replace((Component) topWidgetClass.newInstance(), null);
start(newFlow, null, null);
}
}
/**
* Method that must be implemented to build the menu.
* @return built menu.
*/
protected abstract MenuItem buildMenu() throws Exception;
}