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/*******************************************************************************
* Copyright (c) 2008, 2013 Obeo, CEA LIST, 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:
* Obeo - initial API and implementation
* modified by CEA-LIST
* Christian W. Damus (CEA LIST) - delegate object localization to a new service
*******************************************************************************/
package org.eclipse.papyrus.uml.diagram.common.listeners;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.gef.EditPartViewer;
import org.eclipse.gef.Request;
import org.eclipse.gmf.runtime.diagram.ui.parts.DiagramDropTargetListener;
import org.eclipse.gmf.runtime.diagram.ui.parts.DiagramGraphicalViewer;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.papyrus.infra.gmfdiag.common.preferences.PreferencesConstantsHelper;
import org.eclipse.papyrus.infra.emf.utils.EMFHelper;
import org.eclipse.papyrus.infra.services.localizer.IObjectLocalizer;
import org.eclipse.papyrus.infra.services.localizer.util.LocalizerUtil;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.dnd.TransferData;
/**
* This class is used to handle drop event on diagram
*
*/
public abstract class DropTargetListener extends DiagramDropTargetListener {
public static final String EVENT_DETAIL = "EVENT_DETAIL";
public DropTargetListener(EditPartViewer viewer, Transfer xfer) {
super(viewer, xfer);
}
@SuppressWarnings("unchecked")
@Override
protected Request createTargetRequest() {
Request r = super.createTargetRequest();
if(r != null && r.getExtendedData() != null) {
r.getExtendedData().put(EVENT_DETAIL, getCurrentEvent().detail);
//430099: [Diagram] Snap to Grid for elements dropped from the ModelExplorer is ignored
//https://bugs.eclipse.org/bugs/show_bug.cgi?id=430099
boolean isSnapping = ((DiagramGraphicalViewer)getViewer()).getWorkspaceViewerPreferenceStore().getBoolean(PreferencesConstantsHelper.SNAP_TO_GRID_CONSTANT);
r.getExtendedData().put(PreferencesConstantsHelper.SNAP_TO_GRID_CONSTANT, isSnapping);
}
return r;
}
protected abstract Object getJavaObject(TransferData data);
@Override
protected List<EObject> getObjectsBeingDropped() {
// get objects from transfer
TransferData data = getCurrentEvent().currentDataType;
ArrayList<URI> uris = new ArrayList<URI>(); // Array list to keep the
// order of the selection
Object transferedObject = getJavaObject(data);
ArrayList<EObject> result = new ArrayList<EObject>();
if(transferedObject instanceof IStructuredSelection) {
IStructuredSelection selection = (IStructuredSelection)transferedObject;
ResourceSet localSet = getTransactionalEditingDomain().getResourceSet();
IObjectLocalizer localizer = LocalizerUtil.getInstance(localSet);
for(Iterator<?> it = selection.iterator(); it.hasNext();) {
Object nextSelectedObject = it.next();
// if (nextSelectedObject instanceof UMLNavigatorItem) {
// View view = ((UMLNavigatorItem)
// nextSelectedObject).getView();
// nextSelectedObject = view.getElement();
// } else
nextSelectedObject = EMFHelper.getEObject(nextSelectedObject);
if(nextSelectedObject instanceof EObject) {
EObject local = localizer.getLocalEObject(localSet, (EObject)nextSelectedObject);
if(local != null) {
result.add(local);
}
}
}
}
for(URI uri : uris) {
EObject modelObject = getTransactionalEditingDomain().getResourceSet().getEObject(uri, true);
result.add(modelObject);
}
return result;
}
protected abstract TransactionalEditingDomain getTransactionalEditingDomain();
}
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