| /* BasicToolTipUI.java -- |
| Copyright (C) 2004, 2005 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package javax.swing.plaf.basic; |
| |
| import java.awt.Color; |
| import java.awt.Dimension; |
| import java.awt.Font; |
| import java.awt.FontMetrics; |
| import java.awt.Graphics; |
| import java.awt.Insets; |
| import java.awt.Rectangle; |
| import java.beans.PropertyChangeEvent; |
| import java.beans.PropertyChangeListener; |
| |
| import javax.swing.JComponent; |
| import javax.swing.JToolTip; |
| import javax.swing.LookAndFeel; |
| import javax.swing.plaf.ComponentUI; |
| import javax.swing.plaf.ToolTipUI; |
| import javax.swing.text.View; |
| |
| /** |
| * This is the Basic Look and Feel UI class for JToolTip. |
| */ |
| public class BasicToolTipUI extends ToolTipUI |
| { |
| |
| /** |
| * Receives notification when a property of the JToolTip changes. |
| * This updates the HTML renderer if appropriate. |
| */ |
| private class PropertyChangeHandler |
| implements PropertyChangeListener |
| { |
| |
| public void propertyChange(PropertyChangeEvent e) |
| { |
| String prop = e.getPropertyName(); |
| if (prop.equals("tiptext") || prop.equals("font") |
| || prop.equals("foreground")) |
| { |
| JToolTip tip = (JToolTip) e.getSource(); |
| String text = tip.getTipText(); |
| BasicHTML.updateRenderer(tip, text); |
| } |
| } |
| |
| } |
| |
| /** The shared instance of BasicToolTipUI used for all ToolTips. */ |
| private static BasicToolTipUI shared; |
| |
| /** The tooltip's text */ |
| private String text; |
| |
| /** |
| * Handles property changes. |
| */ |
| private PropertyChangeListener propertyChangeHandler; |
| |
| /** |
| * Creates a new BasicToolTipUI object. |
| */ |
| public BasicToolTipUI() |
| { |
| super(); |
| } |
| |
| /** |
| * This method creates a new BasicToolTip UI for the given |
| * JComponent. |
| * |
| * @param c The JComponent to create a UI for. |
| * |
| * @return A BasicToolTipUI that can be used by the given JComponent. |
| */ |
| public static ComponentUI createUI(JComponent c) |
| { |
| if (shared == null) |
| shared = new BasicToolTipUI(); |
| return shared; |
| } |
| |
| /** |
| * This method returns the msximum size of the given JComponent. |
| * |
| * @param c The JComponent to find a maximum size for. |
| * |
| * @return The maximum size. |
| */ |
| public Dimension getMaximumSize(JComponent c) |
| { |
| Dimension d = getPreferredSize(c); |
| View view = (View) c.getClientProperty(BasicHTML.propertyKey); |
| if (view != null) |
| d.width += view.getMaximumSpan(View.X_AXIS) |
| - view.getPreferredSpan(View.X_AXIS); |
| return d; |
| } |
| |
| /** |
| * This method returns the minimum size of the given JComponent. |
| * |
| * @param c The JComponent to find a minimum size for. |
| * |
| * @return The minimum size. |
| */ |
| public Dimension getMinimumSize(JComponent c) |
| { |
| Dimension d = getPreferredSize(c); |
| View view = (View) c.getClientProperty(BasicHTML.propertyKey); |
| if (view != null) |
| d.width -= view.getPreferredSpan(View.X_AXIS) |
| - view.getMinimumSpan(View.X_AXIS); |
| return d; |
| } |
| |
| /** |
| * This method returns the preferred size of the given JComponent. |
| * |
| * @param c The JComponent to find a preferred size for. |
| * |
| * @return The preferred size. |
| */ |
| public Dimension getPreferredSize(JComponent c) |
| { |
| JToolTip tip = (JToolTip) c; |
| String str = tip.getTipText(); |
| FontMetrics fm = c.getFontMetrics(c.getFont()); |
| Insets i = c.getInsets(); |
| Dimension d = new Dimension(i.left + i.right, i.top + i.bottom); |
| if (str != null && ! str.equals("")) |
| { |
| View view = (View) c.getClientProperty(BasicHTML.propertyKey); |
| if (view != null) |
| { |
| d.width += (int) view.getPreferredSpan(View.X_AXIS); |
| d.height += (int) view.getPreferredSpan(View.Y_AXIS); |
| } |
| else |
| { |
| d.width += fm.stringWidth(str) + 6; |
| d.height += fm.getHeight(); |
| } |
| } |
| return d; |
| } |
| |
| /** |
| * This method installs the defaults for the given JComponent. |
| * |
| * @param c The JComponent to install defaults for. |
| */ |
| protected void installDefaults(JComponent c) |
| { |
| LookAndFeel.installColorsAndFont(c, "ToolTip.background", |
| "ToolTip.foreground", "ToolTip.font"); |
| LookAndFeel.installBorder(c, "ToolTip.border"); |
| } |
| |
| /** |
| * This method installs the listeners for the given JComponent. |
| * |
| * @param c The JComponent to install listeners for. |
| */ |
| protected void installListeners(JComponent c) |
| { |
| propertyChangeHandler = new PropertyChangeHandler(); |
| c.addPropertyChangeListener(propertyChangeHandler); |
| } |
| |
| /** |
| * This method installs the UI for the given JComponent. |
| * |
| * @param c The JComponent to install the UI for. |
| */ |
| public void installUI(JComponent c) |
| { |
| c.setOpaque(true); |
| installDefaults(c); |
| BasicHTML.updateRenderer(c, ((JToolTip) c).getTipText()); |
| installListeners(c); |
| } |
| |
| /** |
| * This method paints the given JComponent with the given Graphics object. |
| * |
| * @param g The Graphics object to paint with. |
| * @param c The JComponent to paint. |
| */ |
| public void paint(Graphics g, JComponent c) |
| { |
| JToolTip tip = (JToolTip) c; |
| |
| String text = tip.getTipText(); |
| Font font = c.getFont(); |
| FontMetrics fm = c.getFontMetrics(font); |
| int ascent = fm.getAscent(); |
| Insets i = c.getInsets(); |
| Dimension size = c.getSize(); |
| Rectangle paintR = new Rectangle(i.left, i.top, |
| size.width - i.left - i.right, |
| size.height - i.top - i.bottom); |
| Color saved = g.getColor(); |
| Font oldFont = g.getFont(); |
| g.setColor(Color.BLACK); |
| |
| View view = (View) c.getClientProperty(BasicHTML.propertyKey); |
| if (view != null) |
| view.paint(g, paintR); |
| else |
| g.drawString(text, paintR.x + 3, paintR.y + ascent); |
| |
| g.setFont(oldFont); |
| g.setColor(saved); |
| } |
| |
| /** |
| * This method uninstalls the defaults for the given JComponent. |
| * |
| * @param c The JComponent to uninstall defaults for. |
| */ |
| protected void uninstallDefaults(JComponent c) |
| { |
| c.setForeground(null); |
| c.setBackground(null); |
| c.setFont(null); |
| c.setBorder(null); |
| } |
| |
| /** |
| * This method uninstalls listeners for the given JComponent. |
| * |
| * @param c The JComponent to uninstall listeners for. |
| */ |
| protected void uninstallListeners(JComponent c) |
| { |
| if (propertyChangeHandler != null) |
| { |
| c.removePropertyChangeListener(propertyChangeHandler); |
| propertyChangeHandler = null; |
| } |
| } |
| |
| /** |
| * This method uninstalls the UI for the given JComponent. |
| * |
| * @param c The JComponent to uninstall. |
| */ |
| public void uninstallUI(JComponent c) |
| { |
| uninstallDefaults(c); |
| BasicHTML.updateRenderer(c, ""); |
| uninstallListeners(c); |
| } |
| } |