001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common
008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
010: * License. You can obtain a copy of the License at
011: * http://www.netbeans.org/cddl-gplv2.html
012: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013: * specific language governing permissions and limitations under the
014: * License. When distributing the software, include this License Header
015: * Notice in each file and include the License file at
016: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
017: * particular file as subject to the "Classpath" exception as provided
018: * by Sun in the GPL Version 2 section of the License file that
019: * accompanied this code. If applicable, add the following below the
020: * License Header, with the fields enclosed by brackets [] replaced by
021: * your own identifying information:
022: * "Portions Copyrighted [year] [name of copyright owner]"
023: *
024: * Contributor(s):
025: *
026: * The Original Software is NetBeans. The Initial Developer of the Original
027: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
028: * Microsystems, Inc. All Rights Reserved.
029: *
030: * If you wish your version of this file to be governed by only the CDDL
031: * or only the GPL Version 2, indicate your decision by adding
032: * "[Contributor] elects to include this software in this distribution
033: * under the [CDDL or GPL Version 2] license." If you do not indicate a
034: * single choice of license, a recipient has the option to distribute
035: * your version of this file under either the CDDL, the GPL Version 2 or
036: * to extend the choice of license to its licensees as provided above.
037: * However, if you add GPL Version 2 code and therefore, elected the GPL
038: * Version 2 license, then the option applies only if the new code is
039: * made subject to such option by the copyright holder.
040: */
041: package org.openide.explorer.view;
042:
043: import org.openide.nodes.Node;
044:
045: import java.awt.Point;
046: import java.awt.dnd.*;
047:
048: import javax.swing.JList;
049:
050: /**
051: *
052: * @author Dafe Simonek, Jiri Rechtacek
053: */
054: class ListViewDragSupport extends ExplorerDragSupport {
055: // Attributes
056:
057: /** Holds selected indices - it's here only
058: * as a workaround for sun's bug */
059:
060: /*int[] oldSelection;
061: int[] curSelection;*/
062:
063: // Associations
064: /** The view that manages viewing the data in a tree. */
065: protected ListView view;
066:
067: /** The tree which we are supporting (our client) */
068: protected JList list;
069:
070: // Operations
071:
072: /** Creates new TreeViewDragSupport, initializes gesture */
073: public ListViewDragSupport(ListView view, JList list) {
074: this .comp = list;
075: this .view = view;
076: this .list = list;
077: }
078:
079: int getAllowedDropActions() {
080: return view.getAllowedDropActions();
081: }
082:
083: protected int getAllowedDragActions() {
084: return view.getAllowedDragActions();
085: }
086:
087: /** Initiating the drag */
088: public void dragGestureRecognized(DragGestureEvent dge) {
089: super .dragGestureRecognized(dge);
090: }
091:
092: /** Utility method. Returns either selected nodes in the list
093: * (if cursor hotspot is above some selected node) or the node
094: * the cursor points to.
095: * @return Node array or null if position of the cursor points
096: * to no node.
097: */
098: Node[] obtainNodes(DragGestureEvent dge) {
099: Point dragOrigin = dge.getDragOrigin();
100: int index = list.locationToIndex(dge.getDragOrigin());
101: Object obj = list.getModel().getElementAt(index);
102:
103: if (obj instanceof VisualizerNode) {
104: obj = ((VisualizerNode) obj).node;
105: }
106:
107: // check conditions
108: if ((index < 0)) {
109: return null;
110: }
111:
112: if (!(obj instanceof Node)) {
113: return null;
114: }
115:
116: Node[] result = null;
117:
118: if (list.isSelectedIndex(index)) {
119: // cursor is above selection, so return all selected indices
120: Object[] selected = list.getSelectedValues();
121: result = new Node[selected.length];
122:
123: for (int i = 0; i < selected.length; i++) {
124: if (selected[i] instanceof VisualizerNode) {
125: result[i] = ((VisualizerNode) selected[i]).node;
126: } else {
127: if (!(selected[i] instanceof Node)) {
128: return null;
129: }
130:
131: result[i] = (Node) selected[i];
132: }
133: }
134: } else {
135: // return only the node the cursor is above
136: result = new Node[] { (Node) obj };
137: }
138:
139: return result;
140: }
141: }
142: // end of ListViewDragSupport
|