| /******************************************************************************* |
| * Copyright (c) 2012 Rushan R. Gilmullin and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Rushan R. Gilmullin - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.osbp.vaaclipse.behaviour.idgenerator; |
| |
| import java.util.UUID; |
| |
| import javax.annotation.PostConstruct; |
| import javax.annotation.PreDestroy; |
| import javax.inject.Inject; |
| |
| import org.eclipse.e4.core.contexts.IEclipseContext; |
| import org.eclipse.e4.core.services.events.IEventBroker; |
| import org.eclipse.e4.ui.model.application.MApplication; |
| import org.eclipse.e4.ui.model.application.ui.MElementContainer; |
| import org.eclipse.e4.ui.model.application.ui.MUIElement; |
| import org.eclipse.e4.ui.workbench.UIEvents; |
| import org.osgi.service.event.Event; |
| import org.osgi.service.event.EventHandler; |
| |
| public class ElementIdGeneratorAddon { |
| @Inject |
| IEventBroker eventBroker; |
| |
| @Inject |
| MApplication app; |
| |
| private EventHandler childrenHandler = new EventHandler() { |
| |
| public void handleEvent(Event event) { |
| |
| Object changedObj = event.getProperty(UIEvents.EventTags.ELEMENT); |
| if (!(changedObj instanceof MElementContainer<?>)) |
| return; |
| |
| String eventType = (String) event |
| .getProperty(UIEvents.EventTags.TYPE); |
| if (UIEvents.EventTypes.ADD.equals(eventType)) { |
| |
| Object newValue = event |
| .getProperty(UIEvents.EventTags.NEW_VALUE); |
| if (!(newValue instanceof MUIElement)) |
| return; |
| |
| MUIElement element = (MUIElement) newValue; |
| |
| if (element.getElementId() == null |
| || element.getElementId().trim().isEmpty()) { |
| element.setElementId(UUID.randomUUID().toString()); |
| } |
| } |
| } |
| }; |
| |
| @PostConstruct |
| void init(IEclipseContext context) { |
| eventBroker.subscribe(UIEvents.ElementContainer.TOPIC_CHILDREN, |
| childrenHandler); |
| } |
| |
| @PreDestroy |
| void removeListeners() { |
| eventBroker.unsubscribe(childrenHandler); |
| } |
| } |