svn-gvsig-desktop / trunk / libraries / libUI / src / org / gvsig / gui / beans / controls / dnd / JDnDList.java @ 4520
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package org.gvsig.gui.beans.controls.dnd; |
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import java.awt.datatransfer.DataFlavor; |
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import java.awt.datatransfer.StringSelection; |
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import java.awt.datatransfer.Transferable; |
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import java.awt.datatransfer.UnsupportedFlavorException; |
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import java.awt.dnd.DnDConstants; |
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import java.awt.dnd.DragGestureEvent; |
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import java.awt.dnd.DragGestureListener; |
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import java.awt.dnd.DragSource; |
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import java.awt.dnd.DragSourceDragEvent; |
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import java.awt.dnd.DragSourceDropEvent; |
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import java.awt.dnd.DragSourceEvent; |
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import java.awt.dnd.DragSourceListener; |
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import java.awt.dnd.DropTarget; |
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import java.awt.dnd.DropTargetDragEvent; |
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import java.awt.dnd.DropTargetDropEvent; |
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import java.awt.dnd.DropTargetEvent; |
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import java.awt.dnd.DropTargetListener; |
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import java.io.IOException; |
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import java.util.ArrayList; |
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import java.util.StringTokenizer; |
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import javax.swing.JList; |
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2005 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib??ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*/
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/* CVS MESSAGES:
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*
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* $Id: JDnDList.java 4520 2006-03-22 11:18:29Z jaume $
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* $Log$
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* Revision 1.1 2006-03-22 11:18:29 jaume
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* *** empty log message ***
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*
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* Revision 1.4 2006/02/28 15:25:14 jaume
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* *** empty log message ***
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*
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* Revision 1.2.2.3 2006/01/31 16:25:24 jaume
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* correcciones de bugs
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*
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* Revision 1.3 2006/01/26 16:07:14 jaume
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* *** empty log message ***
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*
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* Revision 1.2.2.1 2006/01/26 12:59:33 jaume
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* 0.5
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*
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* Revision 1.2 2006/01/24 14:36:33 jaume
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* This is the new version
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*
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* Revision 1.1.2.1 2006/01/10 13:11:38 jaume
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* *** empty log message ***
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*
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* Revision 1.1.2.1 2005/12/29 08:26:54 jaume
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* some gui issues where fixed
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*
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* Revision 1.1.2.1 2005/12/19 18:12:35 jaume
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* *** empty log message ***
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*
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*
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*/
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/**
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* <p>
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* A JList that allows drag'n'drop elements. It accepts changing position of
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* one or more elements within the list, adding other from other JDnDList's,
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* removing sets of selected items, and other features.
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* </p>
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* <p>
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* In order to use this features you have to use a JDnDListModel as the list's
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* model.
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* </p>
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* jaume dominguez faus - jaume.dominguez@iver.es
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*/
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public class JDnDList extends JList implements DragSourceListener, DragGestureListener, DropTargetListener{ |
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private DragSource dragSource; |
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private DropTarget dropTarget; |
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private boolean dragging; |
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private int overIndex; |
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private int[] selectedIndices; |
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public JDnDList() {
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dropTarget = new DropTarget (this, this); |
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dragSource = new DragSource(); |
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dragSource.createDefaultDragGestureRecognizer( this, DnDConstants.ACTION_MOVE, this); |
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} |
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public JDnDList( JDnDListModel model ) {
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super( model );
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// Configure ourselves to be a drag source
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dragSource = new DragSource(); |
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dragSource.createDefaultDragGestureRecognizer( this, DnDConstants.ACTION_MOVE, this); |
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// Configure ourselves to be a drop target
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dropTarget = new DropTarget( this, this ); |
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} |
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public void dragGestureRecognized(DragGestureEvent dge) { |
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this.selectedIndices = this.getSelectedIndices(); |
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Object[] selectedObjects = this.getSelectedValues(); |
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if( selectedObjects.length > 0 ) { |
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StringBuffer sb = new StringBuffer(); |
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for( int i=0; i<selectedObjects.length; i++ ) { |
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sb.append( selectedObjects[ i ].toString() + "\n" );
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} |
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// Build a StringSelection object that the Drag Source
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// can use to transport a string to the Drop Target
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StringSelection text = new StringSelection( sb.toString() ); |
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// Start dragging the object
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this.dragging = true; |
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dragSource.startDrag( dge, DragSource.DefaultMoveDrop, text, this ); |
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} |
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} |
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public void dragDropEnd(DragSourceDropEvent dsde) { |
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this.dragging = false; |
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} |
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public void dragExit(DropTargetEvent dte) { |
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this.overIndex = -1; |
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} |
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public void dragEnter(DropTargetDragEvent dtde) { |
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this.overIndex = this.locationToIndex( dtde.getLocation() ); |
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this.setSelectedIndex( this.overIndex ); |
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} |
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public void dragOver(DropTargetDragEvent dtde) { |
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// See who we are over...
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int overIndex = this.locationToIndex( dtde.getLocation() ); |
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if( overIndex != -1 && overIndex != this.overIndex ) { |
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// If the value has changed from what we were previously over
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// then change the selected object to the one we are over; this
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// is a visual representation that this is where the drop will occur
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this.overIndex = overIndex;
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this.setSelectedIndex( this.overIndex ); |
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} |
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} |
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public void drop(DropTargetDropEvent dtde) { |
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try {
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Transferable transferable = dtde.getTransferable();
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if( transferable.isDataFlavorSupported( DataFlavor.stringFlavor ) ) { |
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dtde.acceptDrop( DnDConstants.ACTION_MOVE );
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// Find out where the item was dropped
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int newIndex = this.locationToIndex( dtde.getLocation() ); |
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// Get the items out of the transferable object and build an
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// array out of them...
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String s = ( String )transferable.getTransferData( DataFlavor.stringFlavor ); |
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StringTokenizer st = new StringTokenizer( s ); |
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ArrayList items = new ArrayList(); |
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while( st.hasMoreTokens() ) {
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items.add( st.nextToken() ); |
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} |
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JDnDListModel model = ( JDnDListModel )this.getModel();
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// If we are dragging from our this to our list them move the items,
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// otherwise just add them...
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if( this.dragging ) { |
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//model.itemsMoved( newIndex, items );
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model.itemsMoved( newIndex, this.selectedIndices );
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} else {
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model.insertItems( newIndex, items ); |
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} |
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// Update the selected indicies
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int[] newIndicies = new int[ items.size() ]; |
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for( int i=0; i<items.size(); i++ ) { |
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newIndicies[ i ] = newIndex + i; |
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} |
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this.setSelectedIndices( newIndicies );
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// Reset the over index
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this.overIndex = -1; |
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dtde.getDropTargetContext().dropComplete( true );
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} else {
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dtde.rejectDrop(); |
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} |
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} catch( IOException exception ) { |
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exception.printStackTrace(); |
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System.err.println( "Exception" + exception.getMessage()); |
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dtde.rejectDrop(); |
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} catch( UnsupportedFlavorException ufException ) { |
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ufException.printStackTrace(); |
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System.err.println( "Exception" + ufException.getMessage()); |
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dtde.rejectDrop(); |
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} |
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} |
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/* (non-Javadoc)
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* @see java.awt.dnd.DragSourceListener#dragEnter(java.awt.dnd.DragSourceDragEvent)
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*/
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public void dragEnter(DragSourceDragEvent dsde) { |
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} |
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/* (non-Javadoc)
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* @see java.awt.dnd.DragSourceListener#dragOver(java.awt.dnd.DragSourceDragEvent)
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*/
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public void dragOver(DragSourceDragEvent dsde) { |
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} |
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/* (non-Javadoc)
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* @see java.awt.dnd.DragSourceListener#dropActionChanged(java.awt.dnd.DragSourceDragEvent)
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*/
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public void dropActionChanged(DragSourceDragEvent dsde) { |
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} |
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/* (non-Javadoc)
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* @see java.awt.dnd.DragSourceListener#dragExit(java.awt.dnd.DragSourceEvent)
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*/
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public void dragExit(DragSourceEvent dse) { |
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} |
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/* (non-Javadoc)
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* @see java.awt.dnd.DropTargetListener#dropActionChanged(java.awt.dnd.DropTargetDragEvent)
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*/
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public void dropActionChanged(DropTargetDragEvent dtde) { |
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} |
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} |