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 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()); 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 context.dispose(); 92 style = null; 93 super.uninstallDefaults(); 94 } 95 96 private void updateStyle(JTextComponent comp) { 97 SynthContext context = getContext(comp, ENABLED); 98 SynthStyle oldStyle = style; 99 100 style = SynthLookAndFeel.updateStyle(context, this); 101 102 if (style != oldStyle) { 103 SynthTextFieldUI.updateStyle(comp, context, getPropertyPrefix()); 104 105 if (oldStyle != null) { 106 uninstallKeyboardActions(); 107 installKeyboardActions(); 108 } 109 } 110 context.dispose(); 111 } 112 113 /** 114 * {@inheritDoc} 115 */ 116 @Override 117 public SynthContext getContext(JComponent c) { 118 return getContext(c, SynthLookAndFeel.getComponentState(c)); 119 } 120 121 private SynthContext getContext(JComponent c, int state) { 122 return SynthContext.getContext(c, style, state); 123 } 124 125 /** 126 * Notifies this UI delegate to repaint the specified component. 127 * This method paints the component background, then calls 128 * the {@link #paint(SynthContext,Graphics)} method. 129 * 130 * <p>In general, this method does not need to be overridden by subclasses. 131 * All Look and Feel rendering code should reside in the {@code paint} method. 132 * 133 * @param g the {@code Graphics} object used for painting 134 * @param c the component being painted 135 * @see #paint(SynthContext,Graphics) 136 */ 137 @Override 138 public void update(Graphics g, JComponent c) { 139 SynthContext context = getContext(c); 140 141 SynthLookAndFeel.update(context, g); 142 context.getPainter().paintTextAreaBackground(context, 143 g, 0, 0, c.getWidth(), c.getHeight()); 144 paint(context, g); 145 context.dispose(); 146 } 147 148 /** 149 * Paints the specified component. 150 * 151 * @param context context for the component being painted 152 * @param g the {@code Graphics} object used for painting 153 * @see #update(Graphics,JComponent) 154 */ 155 protected void paint(SynthContext context, Graphics g) { 156 super.paint(g, getComponent()); 157 } 158 159 /** 160 * {@inheritDoc} 161 * 162 * Overridden to do nothing. 163 */ 164 @Override 165 protected void paintBackground(Graphics g) { 166 // Overriden to do nothing, all our painting is done from update/paint. 167 } 168 169 /** 170 * {@inheritDoc} 171 */ 172 @Override 173 public void paintBorder(SynthContext context, Graphics g, int x, 174 int y, int w, int h) { 175 context.getPainter().paintTextAreaBorder(context, g, x, y, w, h); 176 } 177 178 /** 179 * This method gets called when a bound property is changed 180 * on the associated JTextComponent. This is a hook 181 * which UI implementations may change to reflect how the 182 * UI displays bound properties of JTextComponent subclasses. 183 * This is implemented to rebuild the View when the 184 * <em>WrapLine</em> or the <em>WrapStyleWord</em> property changes. 185 * 186 * @param evt the property change event 187 */ 188 @Override 189 protected void propertyChange(PropertyChangeEvent evt) { 190 if (SynthLookAndFeel.shouldUpdateStyle(evt)) { 191 updateStyle((JTextComponent)evt.getSource()); 192 } 193 super.propertyChange(evt); 194 } 195 196 private final class Handler implements FocusListener { 197 public void focusGained(FocusEvent e) { 198 getComponent().repaint(); 199 } 200 201 public void focusLost(FocusEvent e) { 202 getComponent().repaint(); 203 } 204 } 205 }