// $Id: DnDJGraph.java 16426 2008-12-23 00:02:10Z bobtarling $
// Copyright (c) 2005-2008 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.ui.TransferableModelElements;
import org.argouml.uml.diagram.ArgoDiagram;
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.FigNode;
/**
* This is a JGraph with Drag and Drop capabilities.
*
* @author mvw@tigris.org
*/
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()) {
FigNode figNode = ((UMLDiagram ) diagram).drop(i.next(),
dropTargetDropEvent.getLocation());
if (figNode != null) {
MutableGraphModel gm =
(MutableGraphModel) diagram.getGraphModel();
if (!gm.getNodes().contains(figNode.getOwner())) {
gm.getNodes().add(figNode.getOwner());
}
Globals.curEditor().getLayerManager().getActiveLayer()
.add(figNode);
gm.addNodeRelatedEdges(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;
}