001 /*
002 * Copyright 1998-2004 Sun Microsystems, Inc. All Rights Reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation. Sun designates this
008 * particular file as subject to the "Classpath" exception as provided
009 * by Sun in the LICENSE file that accompanied this code.
010 *
011 * This code is distributed in the hope that it will be useful, but WITHOUT
012 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
014 * version 2 for more details (a copy is included in the LICENSE file that
015 * accompanied this code).
016 *
017 * You should have received a copy of the GNU General Public License version
018 * 2 along with this work; if not, write to the Free Software Foundation,
019 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020 *
021 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022 * CA 95054 USA or visit www.sun.com if you need additional information or
023 * have any questions.
024 */
025 package javax.swing.text.html;
026
027 import java.awt.*;
028 import java.awt.event.*;
029 import java.io.*;
030 import java.net.MalformedURLException;
031 import java.net.URL;
032 import javax.swing.text.*;
033 import javax.swing.*;
034 import javax.swing.border.*;
035 import javax.swing.event.*;
036 import java.util.*;
037
038 /**
039 * EditableView sets the view it contains to be visible only when the
040 * JTextComponent the view is contained in is editable. The min/pref/max
041 * size is 0 when not visible.
042 *
043 * @author Scott Violet
044 * @version 1.19, 05/05/07
045 */
046 class EditableView extends ComponentView {
047
048 EditableView(Element e) {
049 super (e);
050 }
051
052 public float getMinimumSpan(int axis) {
053 if (isVisible) {
054 return super .getMinimumSpan(axis);
055 }
056 return 0;
057 }
058
059 public float getPreferredSpan(int axis) {
060 if (isVisible) {
061 return super .getPreferredSpan(axis);
062 }
063 return 0;
064 }
065
066 public float getMaximumSpan(int axis) {
067 if (isVisible) {
068 return super .getMaximumSpan(axis);
069 }
070 return 0;
071 }
072
073 public void paint(Graphics g, Shape allocation) {
074 Component c = getComponent();
075 Container host = getContainer();
076
077 if (host != null
078 && isVisible != ((JTextComponent) host).isEditable()) {
079 isVisible = ((JTextComponent) host).isEditable();
080 preferenceChanged(null, true, true);
081 host.repaint();
082 }
083 /*
084 * Note: we cannot tweak the visible state of the
085 * component in createComponent() even though it
086 * gets called after the setParent() call where
087 * the value of the boolean is set. This
088 * because, the setComponentParent() in the
089 * superclass, always does a setVisible(false)
090 * after calling createComponent(). We therefore
091 * use this flag in the paint() method to
092 * setVisible() to true if required.
093 */
094 if (isVisible) {
095 super .paint(g, allocation);
096 } else {
097 setSize(0, 0);
098 }
099 if (c != null) {
100 c.setFocusable(isVisible);
101 }
102 }
103
104 public void setParent(View parent) {
105 if (parent != null) {
106 Container host = parent.getContainer();
107 if (host != null) {
108 if (host instanceof JTextComponent) {
109 isVisible = ((JTextComponent) host).isEditable();
110 } else {
111 isVisible = false;
112 }
113 }
114 }
115 super .setParent(parent);
116 }
117
118 /**
119 * @return true if the Component is visible.
120 */
121 public boolean isVisible() {
122 return isVisible;
123 }
124
125 /** Set to true if the component is visible. This is based off the
126 * editability of the container. */
127 private boolean isVisible;
128 } // End of EditableView
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