/* $Id: DnDJGraph.java 18729 2010-09-10 16:10:34Z bobtarling $
*****************************************************************************
* Copyright (c) 2009-2010 Contributors - see below
* 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:
* Michiel van der Wulp
* Bob Tarling
*****************************************************************************
*
* Some portions of this file was previously release using the BSD License:
*/
// Copyright (c) 2005-2009 The Regents of the University of California. All
// Rights Reserved. Permission to use, copy, modify, and distribute this
// software and its documentation without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph appear in all copies. This software program and
// documentation are copyrighted by The Regents of the University of
// California. The software program and documentation are supplied "AS
// IS", without any accompanying services from The Regents. The Regents
// does not warrant that the operation of the program will be
// uninterrupted or error-free. The end-user understands that the program
// was developed for research purposes and is advised not to rely
// exclusively on the program for any reason. IN NO EVENT SHALL THE
// UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
// SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,
// ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
// THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
// PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
// CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT,
// UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
package org.argouml.uml.diagram.ui;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DropTarget;
import java.awt.dnd.DropTargetDragEvent;
import java.awt.dnd.DropTargetDropEvent;
import java.awt.dnd.DropTargetEvent;
import java.awt.dnd.DropTargetListener;
import java.io.IOException;
import java.util.Collection;
import java.util.Iterator;
import org.apache.log4j.Logger;
import org.argouml.kernel.Owned;
import org.argouml.ui.TransferableModelElements;
import org.argouml.uml.diagram.ArgoDiagram;
import org.argouml.uml.diagram.DiagramElement;
import org.argouml.uml.diagram.DiagramUtils;
import org.tigris.gef.base.Diagram;
import org.tigris.gef.base.Editor;
import org.tigris.gef.base.Globals;
import org.tigris.gef.graph.ConnectionConstrainer;
import org.tigris.gef.graph.GraphModel;
import org.tigris.gef.graph.MutableGraphModel;
import org.tigris.gef.graph.presentation.JGraph;
import org.tigris.gef.presentation.Fig;
import org.tigris.gef.presentation.FigNode;
/**
* This is a JGraph with Drag and Drop capabilities.
*
* @author mvw
*/
class DnDJGraph
extends JGraph
implements DropTargetListener {
private static final Logger LOG = Logger.getLogger(DnDJGraph.class);
/**
* The constructor.
*
*/
public DnDJGraph() {
super();
makeDropTarget();
}
/**
* The constructor.
*
* @param cc The ConnectionConstrainer.
*/
public DnDJGraph(ConnectionConstrainer cc) {
super(cc);
makeDropTarget();
}
/**
* The constructor.
*
* @param d The Diagram.
*/
public DnDJGraph(Diagram d) {
super(d);
makeDropTarget();
}
/**
* The constructor.
*
* @param gm The GraphModel.
*/
public DnDJGraph(GraphModel gm) {
super(gm);
makeDropTarget();
}
/**
* The constructor.
*
* @param ed The Editor.
*/
public DnDJGraph(Editor ed) {
super(ed);
makeDropTarget();
}
private void makeDropTarget() {
new DropTarget(this,
DnDConstants.ACTION_COPY_OR_MOVE,
this);
}
/*
* @see java.awt.dnd.DropTargetListener#dragEnter(
* java.awt.dnd.DropTargetDragEvent)
*/
public void dragEnter(DropTargetDragEvent dtde) {
try {
if (dtde.isDataFlavorSupported(
TransferableModelElements.UML_COLLECTION_FLAVOR)) {
dtde.acceptDrag(dtde.getDropAction());
return;
}
} catch (NullPointerException e) {
// System.err.println("NullPointerException ignored.");
}
dtde.rejectDrag();
}
/*
* @see java.awt.dnd.DropTargetListener#dragOver(
* java.awt.dnd.DropTargetDragEvent)
*/
public void dragOver(DropTargetDragEvent dtde) {
try {
ArgoDiagram dia = DiagramUtils.getActiveDiagram();
if (dia instanceof UMLDiagram
/*&& ((UMLDiagram) dia).doesAccept(dtde.getSource())*/) {
dtde.acceptDrag(dtde.getDropAction());
return;
}
if (dtde.isDataFlavorSupported(
TransferableModelElements.UML_COLLECTION_FLAVOR)) {
dtde.acceptDrag(dtde.getDropAction());
return;
}
} catch (NullPointerException e) {
// System.err.println("NullPointerException ignored.");
}
dtde.rejectDrag();
}
/*
* @see java.awt.dnd.DropTargetListener#dropActionChanged(
* java.awt.dnd.DropTargetDragEvent)
*/
public void dropActionChanged(DropTargetDragEvent dtde) {
// ignored
}
/*
* @see java.awt.dnd.DropTargetListener#dragExit(
* java.awt.dnd.DropTargetEvent)
*/
public void dragExit(DropTargetEvent dte) {
// ignored
}
/*
* @see java.awt.dnd.DropTargetListener#drop(
* java.awt.dnd.DropTargetDropEvent)
*/
public void drop(DropTargetDropEvent dropTargetDropEvent) {
Transferable tr = dropTargetDropEvent.getTransferable();
//if the flavor is not supported, then reject the drop:
if (!tr.isDataFlavorSupported(
TransferableModelElements.UML_COLLECTION_FLAVOR)) {
dropTargetDropEvent.rejectDrop();
return;
}
dropTargetDropEvent.acceptDrop(dropTargetDropEvent.getDropAction());
//get the model elements that are being transfered.
Collection modelElements;
try {
ArgoDiagram diagram = DiagramUtils.getActiveDiagram();
modelElements =
(Collection) tr.getTransferData(
TransferableModelElements.UML_COLLECTION_FLAVOR);
Iterator i = modelElements.iterator();
while (i.hasNext()) {
/* TODO: Why not call UMLDiagram.doesAccept() first,
* like in ClassDiagramRenderer? */
DiagramElement figNode = ((UMLDiagram ) diagram).drop(i.next(),
dropTargetDropEvent.getLocation());
if (figNode != null && figNode instanceof Owned) {
MutableGraphModel gm =
(MutableGraphModel) diagram.getGraphModel();
Object owner = ((Owned) figNode).getOwner();
if (!gm.getNodes().contains(owner)) {
gm.getNodes().add(owner);
}
Globals.curEditor().getLayerManager().getActiveLayer()
.add((Fig) figNode);
if (figNode instanceof FigNode && figNode instanceof Owned) {
gm.addNodeRelatedEdges(((Owned) figNode).getOwner());
}
}
}
dropTargetDropEvent.getDropTargetContext().dropComplete(true);
} catch (UnsupportedFlavorException e) {
LOG.debug("Exception caught", e);
} catch (IOException e) {
LOG.debug("Exception caught", e);
}
}
/**
* The UID.
*/
private static final long serialVersionUID = -5753683239435014182L;
}