| /******************************************************************************* |
| * Copyright (c) 2018 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| ******************************************************************************/ |
| |
| package org.eclipse.e4.ui.internal.workbench; |
| |
| import javax.inject.Inject; |
| import org.eclipse.e4.core.di.annotations.Optional; |
| import org.eclipse.e4.ui.di.UISynchronize; |
| import org.eclipse.e4.ui.model.application.ui.MUIElement; |
| import org.eclipse.e4.ui.model.application.ui.basic.MWindow; |
| import org.eclipse.e4.ui.workbench.UIEvents.EventTags; |
| import org.eclipse.emf.ecore.EObject; |
| import org.osgi.service.event.Event; |
| import org.osgi.service.event.EventHandler; |
| |
| /** |
| * Event handler for the UIEvents.UIElement.TOPIC_WIDGET topic. Cleans up after |
| * a hosted element is disposed. |
| * |
| * @see ModelServiceImpl |
| */ |
| public class HostedElementEventHandler implements EventHandler { |
| |
| @Inject |
| @Optional |
| UISynchronize uiSync; |
| |
| @Override |
| public void handleEvent(Event event) { |
| // as we change the UI application model, this code needs to be executed in the |
| // UI thread |
| if (uiSync != null) { |
| uiSync.syncExec(() -> { |
| final MUIElement changedElement = (MUIElement) event.getProperty(EventTags.ELEMENT); |
| if (!changedElement.getTags().contains(ModelServiceImpl.HOSTED_ELEMENT)) { |
| return; |
| } |
| |
| if (changedElement.getWidget() != null) { |
| return; |
| } |
| |
| EObject eObj = (EObject) changedElement; |
| if (!(eObj.eContainer() instanceof MWindow)) { |
| return; |
| } |
| |
| MWindow hostingWindow = (MWindow) eObj.eContainer(); |
| hostingWindow.getSharedElements().remove(changedElement); |
| changedElement.getTags().remove(ModelServiceImpl.HOSTED_ELEMENT); |
| }); |
| } |
| } |
| } |