1 /*
2 * Copyright (c) 1997, 1998, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package com.sun.java.swing.plaf.motif;
26
27 import java.awt.*;
28 import java.awt.event.*;
29
30 import javax.swing.*;
31 import javax.swing.text.*;
32 import javax.swing.plaf.*;
33
34 /**
35 * Provides the look and feel features that are common across
36 * the Motif/CDE text LAF implementations.
37 * <p>
38 * <strong>Warning:</strong>
39 * Serialized objects of this class will not be compatible with
40 * future Swing releases. The current serialization support is appropriate
41 * for short term storage or RMI between applications running the same
42 * version of Swing. A future release of Swing will provide support for
43 * long term persistence.
44 *
45 * @author Timothy Prinzing
46 */
47 public class MotifTextUI {
48
49 /**
50 * Creates the object to use for a caret for all of the Motif
51 * text components. The caret is rendered as an I-beam on Motif.
52 *
53 * @return the caret object
54 */
55 public static Caret createCaret() {
56 return new MotifCaret();
57 }
58
59 /**
60 * The motif caret is rendered as an I beam.
61 * <p>
62 * <strong>Warning:</strong>
63 * Serialized objects of this class will not be compatible with
64 * future Swing releases. The current serialization support is appropriate
65 * for short term storage or RMI between applications running the same
66 * version of Swing. A future release of Swing will provide support for
67 * long term persistence.
68 */
69 public static class MotifCaret extends DefaultCaret implements UIResource {
70
71 /**
72 * Called when the component containing the caret gains
73 * focus. This is implemented to repaint the component
74 * so the focus rectangle will be re-rendered, as well
75 * as providing the superclass behavior.
76 *
77 * @param e the focus event
78 * @see FocusListener#focusGained
79 */
80 public void focusGained(FocusEvent e) {
81 super.focusGained(e);
82 getComponent().repaint();
83 }
84
85 /**
86 * Called when the component containing the caret loses
87 * focus. This is implemented to set the caret to visibility
88 * to false.
89 *
90 * @param e the focus event
91 * @see FocusListener#focusLost
92 */
93 public void focusLost(FocusEvent e) {
94 super.focusLost(e);
95 getComponent().repaint();
96 }
97
98 /**
99 * Damages the area surrounding the caret to cause
100 * it to be repainted. If paint() is reimplemented,
101 * this method should also be reimplemented.
102 *
103 * @param r the current location of the caret, does nothing if null
104 * @see #paint
105 */
106 protected void damage(Rectangle r) {
107 if (r != null) {
108 x = r.x - IBeamOverhang - 1;
109 y = r.y;
110 width = r.width + (2 * IBeamOverhang) + 3;
111 height = r.height;
112 repaint();
113 }
114 }
115
116 /**
117 * Renders the caret as a vertical line. If this is reimplemented
118 * the damage method should also be reimplemented as it assumes the
119 * shape of the caret is a vertical line. Does nothing if isVisible()
120 * is false. The caret color is derived from getCaretColor() if
121 * the component has focus, else from getDisabledTextColor().
122 *
123 * @param g the graphics context
124 * @see #damage
125 */
126 public void paint(Graphics g) {
127 if(isVisible()) {
128 try {
129 JTextComponent c = getComponent();
130 Color fg = c.hasFocus() ? c.getCaretColor() :
131 c.getDisabledTextColor();
132 TextUI mapper = c.getUI();
133 int dot = getDot();
134 Rectangle r = mapper.modelToView(c, dot);
135 int x0 = r.x - IBeamOverhang;
136 int x1 = r.x + IBeamOverhang;
137 int y0 = r.y + 1;
138 int y1 = r.y + r.height - 2;
139 g.setColor(fg);
140 g.drawLine(r.x, y0, r.x, y1);
141 g.drawLine(x0, y0, x1, y0);
142 g.drawLine(x0, y1, x1, y1);
143 } catch (BadLocationException e) {
144 // can't render I guess
145 //System.err.println("Can't render caret");
146 }
147 }
148 }
149
150 static final int IBeamOverhang = 2;
151 }
152
153 /**
154 * Default bindings all keymaps implementing the Motif feel.
155 */
156 static final JTextComponent.KeyBinding[] defaultBindings = {
157 new JTextComponent.KeyBinding(KeyStroke.getKeyStroke(KeyEvent.VK_INSERT,
158 InputEvent.CTRL_MASK),
159 DefaultEditorKit.copyAction),
160 new JTextComponent.KeyBinding(KeyStroke.getKeyStroke(KeyEvent.VK_INSERT,
161 InputEvent.SHIFT_MASK),
162 DefaultEditorKit.pasteAction),
163 new JTextComponent.KeyBinding(KeyStroke.getKeyStroke(KeyEvent.VK_DELETE,
164 InputEvent.SHIFT_MASK),
165 DefaultEditorKit.cutAction),
166 new JTextComponent.KeyBinding(KeyStroke.getKeyStroke(KeyEvent.VK_LEFT,
167 InputEvent.SHIFT_MASK),
168 DefaultEditorKit.selectionBackwardAction),
169 new JTextComponent.KeyBinding(KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT,
170 InputEvent.SHIFT_MASK),
171 DefaultEditorKit.selectionForwardAction),
172 };
173
174
175 }