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/*******************************************************************************
* Copyright (c) 2009 Obeo.
* 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
*******************************************************************************/
package org.eclipse.papyrus.navigator.dnd;
import java.util.List;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.papyrus.infra.core.editor.IMultiDiagramEditor;
import org.eclipse.papyrus.infra.core.utils.EditorUtils;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.TransferData;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.navigator.CommonDropAdapter;
import org.eclipse.ui.views.navigator.LocalSelectionTransfer;
import org.eclipse.uml2.common.edit.command.ChangeCommand;
import org.eclipse.uml2.uml.Namespace;
import org.eclipse.uml2.uml.Package;
import org.eclipse.uml2.uml.PackageableElement;
/**
* This class handle Drop events in ModelExplorer view.
*
* @author <a href="mailto:jerome.benois@obeo.fr">Jerome Benois</a>
*/
public class CommonDropAdapterAssistant extends org.eclipse.ui.navigator.CommonDropAdapterAssistant {
public CommonDropAdapterAssistant() {
}
@Override
public IStatus handleDrop(CommonDropAdapter dropAdapter, DropTargetEvent dropTargetEvent, Object dropTarget) {
Package targetElement = (Package)dropTarget;
if(LocalSelectionTransfer.getInstance().isSupportedType(dropAdapter.getCurrentTransfer())) {
switch(dropAdapter.getCurrentOperation()) {
case DND.DROP_MOVE:
handleDropMove(targetElement);
break;
// case DND.DROP_COPY:
// break;
}
}
return null;
}
@Override
public IStatus validateDrop(Object target, int operation, TransferData transferType) {
if(target instanceof Package) {
return Status.OK_STATUS;
}
return Status.CANCEL_STATUS;
}
private void handleDropMove(final Package target) {
ISelection s = LocalSelectionTransfer.getInstance().getSelection();
if(s instanceof IStructuredSelection) {
List<?> selectedElements = ((IStructuredSelection)s).toList();
for(Object o : selectedElements) {
if(o instanceof PackageableElement) {
PackageableElement element = (PackageableElement)o;
moveElementTo(element, target);
}
}
}
}
private void moveElementTo(final PackageableElement element, final Package target) {
TransactionalEditingDomain editingDomain = getEditingDomain();
if(editingDomain != null && (element.getNamespace() instanceof Package)) {
ChangeCommand changeCommand = new ChangeCommand(editingDomain, new Runnable() {
public void run() {
Namespace oldOwner = element.getNamespace();
if(oldOwner instanceof Package) {
// Remove from the old package
Package pkg = (Package)oldOwner;
pkg.getPackagedElements().remove(element);
// Add to the new package
target.getPackagedElements().add(element);
}
}
}, "Move " + element.getName() + " to " + target.getName());
if(changeCommand.canExecute()) {
editingDomain.getCommandStack().execute(changeCommand);
}
}
}
private TransactionalEditingDomain getEditingDomain() {
return EditorUtils.getTransactionalEditingDomain();
}
private IMultiDiagramEditor getMultiDiagramEditor() {
IEditorPart editorPart = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor();
if(editorPart instanceof IMultiDiagramEditor) {
return (IMultiDiagramEditor)editorPart;
}
return null;
}
}
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