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.widget.Scene;
044: import org.netbeans.api.visual.widget.Widget;
045: import org.netbeans.api.visual.action.WidgetAction;
046:
047: import javax.swing.*;
048: import java.awt.*;
049: import java.awt.event.MouseEvent;
050:
051: /**
052: * @author David Kaspar
053: */
054: public final class PanAction extends WidgetAction.LockedAdapter {
055:
056: private Scene scene;
057: private JScrollPane scrollPane;
058: private Point lastLocation;
059:
060: protected boolean isLocked() {
061: return scrollPane != null;
062: }
063:
064: public State mousePressed(Widget widget, WidgetMouseEvent event) {
065: if (isLocked())
066: return State.createLocked(widget, this );
067: if (event.getButton() == MouseEvent.BUTTON2) {
068: scene = widget.getScene();
069: scrollPane = findScrollPane(scene.getView());
070: if (scrollPane != null) {
071: lastLocation = scene.convertSceneToView(widget
072: .convertLocalToScene(event.getPoint()));
073: SwingUtilities.convertPointToScreen(lastLocation, scene
074: .getView());
075: return State.createLocked(widget, this );
076: }
077: }
078: return State.REJECTED;
079: }
080:
081: private JScrollPane findScrollPane(JComponent component) {
082: for (;;) {
083: if (component == null)
084: return null;
085: if (component instanceof JScrollPane)
086: return ((JScrollPane) component);
087: Container parent = component.getParent();
088: if (!(parent instanceof JComponent))
089: return null;
090: component = (JComponent) parent;
091: }
092: }
093:
094: public State mouseReleased(Widget widget, WidgetMouseEvent event) {
095: boolean state = pan(widget, event.getPoint());
096: if (state)
097: scrollPane = null;
098: return state ? State.createLocked(widget, this )
099: : State.REJECTED;
100: }
101:
102: public State mouseDragged(Widget widget, WidgetMouseEvent event) {
103: return pan(widget, event.getPoint()) ? State.createLocked(
104: widget, this ) : State.REJECTED;
105: }
106:
107: private boolean pan(Widget widget, Point newLocation) {
108: if (scrollPane == null || scene != widget.getScene())
109: return false;
110: newLocation = scene.convertSceneToView(widget
111: .convertLocalToScene(newLocation));
112: SwingUtilities.convertPointToScreen(newLocation, scene
113: .getView());
114: JComponent view = scene.getView();
115: Rectangle rectangle = view.getVisibleRect();
116: rectangle.x += lastLocation.x - newLocation.x;
117: rectangle.y += lastLocation.y - newLocation.y;
118: view.scrollRectToVisible(rectangle);
119: lastLocation = newLocation;
120: return true;
121: }
122:
123: }
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