001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common
008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
010: * License. You can obtain a copy of the License at
011: * http://www.netbeans.org/cddl-gplv2.html
012: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013: * specific language governing permissions and limitations under the
014: * License. When distributing the software, include this License Header
015: * Notice in each file and include the License file at
016: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
017: * particular file as subject to the "Classpath" exception as provided
018: * by Sun in the GPL Version 2 section of the License file that
019: * accompanied this code. If applicable, add the following below the
020: * License Header, with the fields enclosed by brackets [] replaced by
021: * your own identifying information:
022: * "Portions Copyrighted [year] [name of copyright owner]"
023: *
024: * Contributor(s):
025: *
026: * The Original Software is NetBeans. The Initial Developer of the Original
027: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
028: * Microsystems, Inc. All Rights Reserved.
029: *
030: * If you wish your version of this file to be governed by only the CDDL
031: * or only the GPL Version 2, indicate your decision by adding
032: * "[Contributor] elects to include this software in this distribution
033: * under the [CDDL or GPL Version 2] license." If you do not indicate a
034: * single choice of license, a recipient has the option to distribute
035: * your version of this file under either the CDDL, the GPL Version 2 or
036: * to extend the choice of license to its licensees as provided above.
037: * However, if you add GPL Version 2 code and therefore, elected the GPL
038: * Version 2 license, then the option applies only if the new code is
039: * made subject to such option by the copyright holder.
040: */
041:
042: package org.netbeans.swing.tabcontrol.plaf;
043:
044: import java.awt.*;
045: import java.lang.ref.WeakReference;
046: import javax.swing.JComponent;
047:
048: /**
049: * Special simple layout used in TabbedContainer. Shows component in the
050: * "stack", it means that only one component is visible at any time, others are
051: * always hidden "below" the visible one. Use method showComponent to select
052: * visible component.
053: *
054: * @author Dafe Simonek
055: */
056: class StackLayout implements LayoutManager {
057:
058: // #100486 - hold visibleComp weakly, because removeLayoutComponent may not
059: // be called and then visibleComp is not freed. See StackLayoutTest for details.
060: /**
061: * Holds currently visible component or null if no comp is visible
062: */
063: private WeakReference<Component> visibleComp = null;
064:
065: /**
066: * Set the currently displayed component. If passed null for the component,
067: * all contained components will be made invisible (sliding windows do this)
068: * @param c Component to show
069: * @param parent Parent container
070: */
071: public void showComponent(Component c, Container parent) {
072: Component comp = getVisibleComponent();
073: if (comp != c) {
074: if (!parent.isAncestorOf(c) && c != null) {
075: parent.add(c);
076: }
077: synchronized (parent.getTreeLock()) {
078: if (comp != null) {
079: comp.setVisible(false);
080: }
081: visibleComp = new WeakReference<Component>(c);
082: if (c != null) {
083: c.setVisible(true);
084: }
085: // trigger re-layout
086: if (c instanceof JComponent) {
087: ((JComponent) c).revalidate();
088: } else {
089: parent.validate(); //XXX revalidate should work!
090: }
091: }
092: }
093: }
094:
095: /** Allows support for content policies
096: * @return Currently visible component or null
097: */
098: public Component getVisibleComponent() {
099: return visibleComp == null ? null : visibleComp.get();
100: }
101:
102: /**
103: * ********** Implementation of LayoutManager interface *********
104: */
105:
106: public void addLayoutComponent(String name, Component comp) {
107: synchronized (comp.getTreeLock()) {
108: comp.setVisible(false);
109: // keep consistency if showComponent was already called on this
110: // component before
111: if (comp == getVisibleComponent()) {
112: visibleComp = null;
113: }
114: /*System.out.println("Border dump for " + comp.getName());
115: borderDump((javax.swing.JComponent)comp, "");*/
116: }
117: }
118:
119: /*private void borderDump (javax.swing.JComponent comp, String space) {
120: javax.swing.border.Border compBorder = comp.getBorder();
121: if (compBorder == null) {
122: System.out.println(space + comp.getClass().getName() + " has no border.");
123: } else {
124: System.out.println(space + comp.getClass().getName() + ": " + compBorder.getClass().getName());
125: }
126: Component curComp;
127: for (int i = 0; i < comp.getComponentCount(); i++) {
128: curComp = comp.getComponent(i);
129: if (curComp instanceof javax.swing.JComponent) {
130: borderDump((javax.swing.JComponent)curComp, space + " ");
131: }
132: }
133: }*/
134:
135: public void removeLayoutComponent(Component comp) {
136: synchronized (comp.getTreeLock()) {
137: if (comp == getVisibleComponent()) {
138: visibleComp = null;
139: }
140: // kick out removed component as visible, so that others
141: // don't have problems with hidden components
142: comp.setVisible(true);
143: }
144: }
145:
146: public void layoutContainer(Container parent) {
147: Component visibleComp = getVisibleComponent();
148: if (visibleComp != null) {
149: synchronized (parent.getTreeLock()) {
150: Insets insets = parent.getInsets();
151: visibleComp.setBounds(insets.left, insets.top, parent
152: .getWidth()
153: - (insets.left + insets.right), parent
154: .getHeight()
155: - (insets.top + insets.bottom));
156: }
157: }
158: }
159:
160: public Dimension minimumLayoutSize(Container parent) {
161: return getEmptySize();
162: }
163:
164: public Dimension preferredLayoutSize(Container parent) {
165: return getEmptySize();
166: }
167:
168: /**
169: * Specifies default size of empty container
170: */
171: private static Dimension getEmptySize() {
172: return new Dimension(50, 50);
173: }
174:
175: }
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