/*
* Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package javax.swing.plaf.basic;
import sun.swing.SwingUtilities2;
import java.awt.*;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.*;
import javax.swing.BorderFactory;
import javax.swing.border.Border;
import javax.swing.plaf.ToolTipUI;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.UIResource;
import javax.swing.text.View;
/**
* Standard tool tip L&F.
* <p>
*
* @author Dave Moore
*/
public class BasicToolTipUI extends ToolTipUI
{
static BasicToolTipUI sharedInstance = new BasicToolTipUI();
/**
* Global <code>PropertyChangeListener</code> that
* <code>createPropertyChangeListener</code> returns.
*/
private static PropertyChangeListener sharedPropertyChangedListener;
private PropertyChangeListener propertyChangeListener;
public static ComponentUI createUI(JComponent c) {
return sharedInstance;
}
public BasicToolTipUI() {
super();
}
public void installUI(JComponent c) {
installDefaults(c);
installComponents(c);
installListeners(c);
}
public void uninstallUI(JComponent c) {
// REMIND: this is NOT getting called
uninstallDefaults(c);
uninstallComponents(c);
uninstallListeners(c);
}
protected void installDefaults(JComponent c){
LookAndFeel.installColorsAndFont(c, "ToolTip.background",
"ToolTip.foreground",
"ToolTip.font");
LookAndFeel.installProperty(c, "opaque", Boolean.TRUE);
componentChanged(c);
}
protected void uninstallDefaults(JComponent c){
LookAndFeel.uninstallBorder(c);
}
/* Unfortunately this has to remain private until we can make API additions.
*/
private void installComponents(JComponent c){
BasicHTML.updateRenderer(c, ((JToolTip)c).getTipText());
}
/* Unfortunately this has to remain private until we can make API additions.
*/
private void uninstallComponents(JComponent c){
BasicHTML.updateRenderer(c, "");
}
protected void installListeners(JComponent c) {
propertyChangeListener = createPropertyChangeListener(c);
c.addPropertyChangeListener(propertyChangeListener);
}
protected void uninstallListeners(JComponent c) {
c.removePropertyChangeListener(propertyChangeListener);
propertyChangeListener = null;
}
/* Unfortunately this has to remain private until we can make API additions.
*/
private PropertyChangeListener createPropertyChangeListener(JComponent c) {
if (sharedPropertyChangedListener == null) {
sharedPropertyChangedListener = new PropertyChangeHandler();
}
return sharedPropertyChangedListener;
}
public void paint(Graphics g, JComponent c) {
Font font = c.getFont();
FontMetrics metrics = SwingUtilities2.getFontMetrics(c, g, font);
Dimension size = c.getSize();
g.setColor(c.getForeground());
// fix for bug 4153892
String tipText = ((JToolTip)c).getTipText();
if (tipText == null) {
tipText = "";
}
Insets insets = c.getInsets();
Rectangle paintTextR = new Rectangle(
insets.left + 3,
insets.top,
size.width - (insets.left + insets.right) - 6,
size.height - (insets.top + insets.bottom));
View v = (View) c.getClientProperty(BasicHTML.propertyKey);
if (v != null) {
v.paint(g, paintTextR);
} else {
g.setFont(font);
SwingUtilities2.drawString(c, g, tipText, paintTextR.x,
paintTextR.y + metrics.getAscent());
}
}
public Dimension getPreferredSize(JComponent c) {
Font font = c.getFont();
FontMetrics fm = c.getFontMetrics(font);
Insets insets = c.getInsets();
Dimension prefSize = new Dimension(insets.left+insets.right,
insets.top+insets.bottom);
String text = ((JToolTip)c).getTipText();
if ((text == null) || text.equals("")) {
text = "";
}
else {
View v = (c != null) ? (View) c.getClientProperty("html") : null;
if (v != null) {
prefSize.width += (int) v.getPreferredSpan(View.X_AXIS) + 6;
prefSize.height += (int) v.getPreferredSpan(View.Y_AXIS);
} else {
prefSize.width += SwingUtilities2.stringWidth(c,fm,text) + 6;
prefSize.height += fm.getHeight();
}
}
return prefSize;
}
public Dimension getMinimumSize(JComponent c) {
Dimension d = getPreferredSize(c);
View v = (View) c.getClientProperty(BasicHTML.propertyKey);
if (v != null) {
d.width -= v.getPreferredSpan(View.X_AXIS) - v.getMinimumSpan(View.X_AXIS);
}
return d;
}
public Dimension getMaximumSize(JComponent c) {
Dimension d = getPreferredSize(c);
View v = (View) c.getClientProperty(BasicHTML.propertyKey);
if (v != null) {
d.width += v.getMaximumSpan(View.X_AXIS) - v.getPreferredSpan(View.X_AXIS);
}
return d;
}
/**
* Invoked when the <code>JCompoment</code> associated with the
* <code>JToolTip</code> has changed, or at initialization time. This
* should update any state dependant upon the <code>JComponent</code>.
*
* @param c the JToolTip the JComponent has changed on.
*/
private void componentChanged(JComponent c) {
JComponent comp = ((JToolTip)c).getComponent();
if (comp != null && !(comp.isEnabled())) {
// For better backward compatability, only install inactive
// properties if they are defined.
if (UIManager.getBorder("ToolTip.borderInactive") != null) {
LookAndFeel.installBorder(c, "ToolTip.borderInactive");
}
else {
LookAndFeel.installBorder(c, "ToolTip.border");
}
if (UIManager.getColor("ToolTip.backgroundInactive") != null) {
LookAndFeel.installColors(c,"ToolTip.backgroundInactive",
"ToolTip.foregroundInactive");
}
else {
LookAndFeel.installColors(c,"ToolTip.background",
"ToolTip.foreground");
}
} else {
LookAndFeel.installBorder(c, "ToolTip.border");
LookAndFeel.installColors(c, "ToolTip.background",
"ToolTip.foreground");
}
}
private static class PropertyChangeHandler implements
PropertyChangeListener {
public void propertyChange(PropertyChangeEvent e) {
String name = e.getPropertyName();
if (name.equals("tiptext") || "font".equals(name) ||
"foreground".equals(name)) {
// remove the old html view client property if one
// existed, and install a new one if the text installed
// into the JLabel is html source.
JToolTip tip = ((JToolTip) e.getSource());
String text = tip.getTipText();
BasicHTML.updateRenderer(tip, text);
}
else if ("component".equals(name)) {
JToolTip tip = ((JToolTip) e.getSource());
if (tip.getUI() instanceof BasicToolTipUI) {
((BasicToolTipUI)tip.getUI()).componentChanged(tip);
}
}
}
}
}