1 /*
2 * Copyright (c) 2002, 2014, 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
26 package javax.swing.plaf.synth;
27
28 import javax.swing.*;
29 import javax.swing.text.*;
30 import javax.swing.plaf.*;
31 import javax.swing.plaf.basic.BasicTextAreaUI;
32 import java.awt.*;
33 import java.awt.event.FocusListener;
34 import java.awt.event.FocusEvent;
35 import java.beans.PropertyChangeEvent;
36
37 /**
38 * Provides the look and feel for a plain text editor in the
39 * Synth look and feel. In this implementation the default UI
40 * is extended to act as a simple view factory.
41 * <p>
42 * <strong>Warning:</strong>
43 * Serialized objects of this class will not be compatible with
44 * future Swing releases. The current serialization support is
45 * appropriate for short term storage or RMI between applications running
46 * the same version of Swing. As of 1.4, support for long term storage
47 * of all JavaBeans
48 * has been added to the <code>java.beans</code> package.
49 * Please see {@link java.beans.XMLEncoder}.
50 *
51 * @author Shannon Hickey
52 * @since 1.7
53 */
54 @SuppressWarnings("serial") // Same-version serialization only
55 public class SynthTextAreaUI extends BasicTextAreaUI implements SynthUI {
56 private Handler handler = new Handler();
57 private SynthStyle style;
58 private boolean updateKBAction = true;
59 /**
60 * Creates a UI object for a JTextArea.
61 *
62 * @param ta a text area
63 * @return the UI object
64 */
65 public static ComponentUI createUI(JComponent ta) {
66 return new SynthTextAreaUI();
67 }
68
69 /**
70 * {@inheritDoc}
71 */
72 @Override
73 protected void installDefaults() {
74 // Installs the text cursor on the component
75 super.installDefaults();
76 updateStyle(getComponent(), true);
77 getComponent().addFocusListener(handler);
78 }
79
80 /**
81 * {@inheritDoc}
82 */
83 @Override
84 protected void uninstallDefaults() {
85 SynthContext context = getContext(getComponent(), ENABLED);
86
87 getComponent().putClientProperty("caretAspectRatio", null);
88 getComponent().removeFocusListener(handler);
89
90 style.uninstallDefaults(context);
91 style = null;
92 super.uninstallDefaults();
93 }
94
95 private void updateStyle(JTextComponent comp, boolean updateKBAction) {
96 SynthContext context = getContext(comp, ENABLED);
97 SynthStyle oldStyle = style;
98
99 style = SynthLookAndFeel.updateStyle(context, this);
100
101 if (style != oldStyle) {
102 SynthTextFieldUI.updateStyle(comp, context, getPropertyPrefix());
103
104 if (oldStyle != null && updateKBAction) {
105 uninstallKeyboardActions();
106 installKeyboardActions();
107 }
108 }
109 }
110
111 /**
112 * {@inheritDoc}
113 */
114 @Override
115 public SynthContext getContext(JComponent c) {
116 return getContext(c, SynthLookAndFeel.getComponentState(c));
117 }
118
119 private SynthContext getContext(JComponent c, int state) {
120 return SynthContext.getContext(c, style, state);
121 }
122
123 /**
124 * Notifies this UI delegate to repaint the specified component.
125 * This method paints the component background, then calls
126 * the {@link #paint(SynthContext,Graphics)} method.
127 *
128 * <p>In general, this method does not need to be overridden by subclasses.
129 * All Look and Feel rendering code should reside in the {@code paint} method.
130 *
131 * @param g the {@code Graphics} object used for painting
132 * @param c the component being painted
133 * @see #paint(SynthContext,Graphics)
134 */
135 @Override
136 public void update(Graphics g, JComponent c) {
137 SynthContext context = getContext(c);
138
139 SynthLookAndFeel.update(context, g);
140 context.getPainter().paintTextAreaBackground(context,
141 g, 0, 0, c.getWidth(), c.getHeight());
142 paint(context, g);
143 }
144
145 /**
146 * Paints the specified component.
147 *
148 * @param context context for the component being painted
149 * @param g the {@code Graphics} object used for painting
150 * @see #update(Graphics,JComponent)
151 */
152 protected void paint(SynthContext context, Graphics g) {
153 super.paint(g, getComponent());
154 }
155
156 /**
157 * {@inheritDoc}
158 *
159 * Overridden to do nothing.
160 */
161 @Override
162 protected void paintBackground(Graphics g) {
163 // Overriden to do nothing, all our painting is done from update/paint.
164 }
165
166 /**
167 * {@inheritDoc}
168 */
169 @Override
170 public void paintBorder(SynthContext context, Graphics g, int x,
171 int y, int w, int h) {
172 context.getPainter().paintTextAreaBorder(context, g, x, y, w, h);
173 }
174
175 /**
176 * This method gets called when a bound property is changed
177 * on the associated JTextComponent. This is a hook
178 * which UI implementations may change to reflect how the
179 * UI displays bound properties of JTextComponent subclasses.
180 * This is implemented to rebuild the View when the
181 * <em>WrapLine</em> or the <em>WrapStyleWord</em> property changes.
182 *
183 * @param evt the property change event
184 */
185 @Override
186 protected void propertyChange(PropertyChangeEvent evt) {
187 if (evt.getPropertyName().equals("keymap")) {
188 if (evt.getNewValue() != null)
189 {
190 updateKBAction = false;
191 } else {
192 updateKBAction = true;
193 }
194 }
195 if (SynthLookAndFeel.shouldUpdateStyle(evt)) {
196 updateStyle((JTextComponent)evt.getSource(), updateKBAction);
197 }
198 super.propertyChange(evt);
199 }
200
201 private final class Handler implements FocusListener {
202 public void focusGained(FocusEvent e) {
203 getComponent().repaint();
204 }
205
206 public void focusLost(FocusEvent e) {
207 getComponent().repaint();
208 }
209 }
210 }