1 /*
2 * JScroll - the scrollable desktop pane for Java.
3 * Copyright (C) 2003 Tom Tessier
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 *
19 */
20
21 package org.jscroll.widgets;
22
23 import java.awt.event.*;
24
25
26 /***
27 * This class provides common Component and Action Listeners for
28 * other objects in the system.
29 *
30 * @author <a href="mailto:tessier@gabinternet.com">Tom Tessier</a>
31 * @version 1.0 11-Aug-2001
32 */
33 public class DesktopListener implements ComponentListener, ActionListener {
34 private DesktopMediator desktopMediator;
35
36 /***
37 * creates the DesktopListener object.
38 *
39 * @param desktopMediator a reference to the DesktopMediator object
40 */
41 public DesktopListener(DesktopMediator desktopMediator) {
42 this.desktopMediator = desktopMediator;
43 }
44
45 ///
46 // respond to component events...
47 ///
48
49 /***
50 * updates the preferred size of the desktop when either an internal frame
51 * or the scrollable desktop pane itself is resized
52 *
53 * @param e the ComponentEvent
54 */
55 public void componentResized(ComponentEvent e) {
56 desktopMediator.resizeDesktop();
57 }
58
59 /***
60 * revalidates the desktop to ensure the viewport has the proper
61 * height/width settings when a new component is shown upon the desktop
62 *
63 * @param e the ComponentEvent
64 */
65 public void componentShown(ComponentEvent e) {
66 desktopMediator.revalidateViewport();
67 }
68
69 /***
70 * updates the preferred size of the desktop when a component is moved
71 *
72 * @param e the ComponentEvent
73 */
74 public void componentMoved(ComponentEvent e) {
75 desktopMediator.resizeDesktop();
76 }
77
78 /***
79 * interface placeholder
80 *
81 * @param e the ComponentEvent
82 */
83 public void componentHidden(ComponentEvent e) {
84 }
85
86 ///
87 // respond to action events...
88 ///
89
90 /***
91 * common actionPerformed method that responds to both button
92 * and menu events.
93 * If no action command provided in the ActionEvent, selects
94 * the frame associated with the current button / menu item (if any).
95 *
96 * @param e the ActionEvent
97 */
98 public void actionPerformed(ActionEvent e) {
99 String actionCmd = e.getActionCommand();
100
101 if (actionCmd.equals("Tile")) {
102 desktopMediator.tileInternalFrames();
103 } else if (actionCmd.equals("Cascade")) {
104 desktopMediator.cascadeInternalFrames();
105 } else if (actionCmd.equals("Close")) {
106 desktopMediator.closeSelectedFrame();
107 }
108 else if (actionCmd.equals("TileRadio")) {
109 desktopMediator.setAutoTile(true);
110 } else if (actionCmd.equals("CascadeRadio")) {
111 desktopMediator.setAutoTile(false);
112 }
113 else { // no action command?
114 // then select the associated frame (if any)
115
116 JScrollInternalFrame associatedFrame = ((FrameAccessorInterface) e.getSource()).getAssociatedFrame();
117
118 if (associatedFrame != null) {
119 associatedFrame.selectFrameAndAssociatedButtons();
120 desktopMediator.centerView(associatedFrame);
121 }
122 }
123 }
124 }
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