/*******************************************************************************
* Copyright (c) 2010, 2014 IBM Corporation 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:
* IBM Corporation - initial API and implementation
* Lars Vogel <Lars.Vogel@gmail.com> - Bug 420639
******************************************************************************/
package org.eclipse.e4.ui.workbench.addons.dndaddon;
import javax.inject.Inject;
import org.eclipse.e4.core.di.annotations.Optional;
import org.eclipse.e4.ui.di.UIEventTopic;
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;
import org.eclipse.e4.ui.workbench.UIEvents.EventTags;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Widget;
import org.osgi.service.event.Event;
/**
* Addon supporting standard drag and drop management
*/
public class DnDAddon {
@Inject
@Optional
void subscribeTopicWidget(@UIEventTopic(UIEvents.UIElement.TOPIC_WIDGET) Event event) {
MUIElement changedElement = (MUIElement) event.getProperty(EventTags.ELEMENT);
if (!(changedElement instanceof MWindow)) {
return;
}
Widget widget = (Widget) event.getProperty(EventTags.NEW_VALUE);
if (widget instanceof Shell && !widget.isDisposed()) {
DnDManager theManager = (DnDManager) widget.getData("DnDManager"); //$NON-NLS-1$
if (theManager == null) {
theManager = new DnDManager((MWindow) changedElement);
widget.setData("DnDManager", theManager); //$NON-NLS-1$
}
}
}
}