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 1997-2007 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.netbeans.modules.visual.action;
042:
043: import org.netbeans.api.visual.action.CycleFocusProvider;
044: import org.netbeans.api.visual.widget.Widget;
045: import org.netbeans.api.visual.widget.Scene;
046: import org.netbeans.api.visual.model.ObjectScene;
047:
048: /**
049: * @author David Kaspar
050: */
051: public class CycleObjectSceneFocusProvider implements
052: CycleFocusProvider {
053:
054: public boolean switchPreviousFocus(Widget widget) {
055: Scene scene = widget.getScene();
056: return scene instanceof ObjectScene
057: && switchFocus((ObjectScene) scene, false);
058: }
059:
060: public boolean switchNextFocus(Widget widget) {
061: Scene scene = widget.getScene();
062: return scene instanceof ObjectScene
063: && switchFocus((ObjectScene) scene, true);
064: }
065:
066: @SuppressWarnings("unchecked")
067: private boolean switchFocus(ObjectScene scene,
068: boolean forwardDirection) {
069: Object object = scene.getFocusedObject();
070: Comparable identityCode = scene.getIdentityCode(object);
071:
072: Object bestObject = null;
073: Comparable bestIdentityCode = null;
074:
075: if (identityCode != null) {
076: for (Object o : scene.getObjects()) {
077: Comparable ic = scene.getIdentityCode(o);
078: if (forwardDirection) {
079: if (identityCode.compareTo(ic) < 0) {
080: if (bestIdentityCode == null
081: || bestIdentityCode.compareTo(ic) > 0) {
082: bestObject = o;
083: bestIdentityCode = ic;
084: }
085: }
086: } else {
087: if (identityCode.compareTo(ic) > 0) {
088: if (bestIdentityCode == null
089: || bestIdentityCode.compareTo(ic) < 0) {
090: bestObject = o;
091: bestIdentityCode = ic;
092: }
093: }
094: }
095: }
096: }
097:
098: if (bestIdentityCode == null) {
099: for (Object o : scene.getObjects()) {
100: Comparable ic = scene.getIdentityCode(o);
101: if (forwardDirection) {
102: if (bestIdentityCode == null
103: || bestIdentityCode.compareTo(ic) > 0) {
104: bestObject = o;
105: bestIdentityCode = ic;
106: }
107: } else {
108: if (bestIdentityCode == null
109: || bestIdentityCode.compareTo(ic) < 0) {
110: bestObject = o;
111: bestIdentityCode = ic;
112: }
113: }
114: }
115: }
116:
117: scene.setFocusedObject(bestObject);
118: return true;
119: }
120:
121: }
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