java/17 : java.desktop/javax/swing/tree/DefaultTreeCellRenderer.java

DefaultTreeCellRenderer
https://openjdk.java.net/
GPLv2 + Classpath Exception
/*
 * Copyright (c) 1997, 2017, 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
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package javax.swing.tree;

import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Insets;
import java.awt.Rectangle;
import javax.swing.plaf.BorderUIResource.EmptyBorderUIResource;
import javax.swing.plaf.ColorUIResource;
import javax.swing.plaf.FontUIResource;
import javax.swing.plaf.UIResource;
import javax.swing.plaf.basic.BasicGraphicsUtils;
import javax.swing.Icon;
import javax.swing.JLabel;
import javax.swing.JTree;
import javax.swing.LookAndFeel;
import javax.swing.UIManager;
import javax.swing.border.EmptyBorder;
import sun.swing.DefaultLookup;
import sun.swing.SwingUtilities2;

Displays an entry in a tree.
DefaultTreeCellRenderer is not opaque and
unless you subclass paint you should not change this.
See How to Use Trees
in The Java Tutorial
for examples of customizing node display using this class.
 The set of icons and colors used by DefaultTreeCellRenderer can be configured using the various setter methods. The value for each property is initialized from the defaults table. When the look and feel changes (updateUI is invoked), any properties that have a value of type UIResource are refreshed from the defaults table. The following table lists the mapping between DefaultTreeCellRenderer property and defaults table key: 

Properties

  
    Property
    Key
  


  
    "leafIcon"
    "Tree.leafIcon"
  

    "closedIcon"
    "Tree.closedIcon"
  

    "openIcon"
    "Tree.openIcon"
  

    "textSelectionColor"
    "Tree.selectionForeground"
  

    "textNonSelectionColor"
    "Tree.textForeground"
  

    "backgroundSelectionColor"
    "Tree.selectionBackground"
  

    "backgroundNonSelectionColor"
    "Tree.textBackground"
  

    "borderSelectionColor"
    "Tree.selectionBorderColor"



Implementation Note:
This class overrides
invalidate,
validate,
revalidate,
repaint,
and
firePropertyChange
solely to improve performance.
If not overridden, these frequently called methods would execute code paths
that are unnecessary for the default tree cell renderer.
If you write your own renderer,
take care to weigh the benefits and
drawbacks of overriding these methods.

Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing.  As of 1.4, support for long term storage
of all JavaBeans
has been added to the java.beans package. Please see XMLEncoder. 
Author: Rob Davis, Ray Ryan, Scott Violet/**
 * Displays an entry in a tree.
 * <code>DefaultTreeCellRenderer</code> is not opaque and
 * unless you subclass paint you should not change this.
 * See <a
 href="https://docs.oracle.com/javase/tutorial/uiswing/components/tree.html">How to Use Trees</a>
 * in <em>The Java Tutorial</em>
 * for examples of customizing node display using this class.
 * <p>
 * The set of icons and colors used by {@code DefaultTreeCellRenderer}
 * can be configured using the various setter methods. The value for
 * each property is initialized from the defaults table. When the
 * look and feel changes ({@code updateUI} is invoked), any properties
 * that have a value of type {@code UIResource} are refreshed from the
 * defaults table. The following table lists the mapping between
 * {@code DefaultTreeCellRenderer} property and defaults table key:
 *
 * <table class="striped">
 * <caption>Properties</caption>
 * <thead>
 *   <tr>
 *     <th scope="col">Property
 *     <th scope="col">Key
 *   </tr>
 * </thead>
 * <tbody>
 *   <tr>
 *     <th scope="row">"leafIcon"
 *     <td>"Tree.leafIcon"
 *   <tr>
 *     <th scope="row">"closedIcon"
 *     <td>"Tree.closedIcon"
 *   <tr>
 *     <th scope="row">"openIcon"
 *     <td>"Tree.openIcon"
 *   <tr>
 *     <th scope="row">"textSelectionColor"
 *     <td>"Tree.selectionForeground"
 *   <tr>
 *     <th scope="row">"textNonSelectionColor"
 *     <td>"Tree.textForeground"
 *   <tr>
 *     <th scope="row">"backgroundSelectionColor"
 *     <td>"Tree.selectionBackground"
 *   <tr>
 *     <th scope="row">"backgroundNonSelectionColor"
 *     <td>"Tree.textBackground"
 *   <tr>
 *     <th scope="row">"borderSelectionColor"
 *     <td>"Tree.selectionBorderColor"
 * </tbody>
 * </table>
 * <p>
 * <strong><a id="override">Implementation Note:</a></strong>
 * This class overrides
 * <code>invalidate</code>,
 * <code>validate</code>,
 * <code>revalidate</code>,
 * <code>repaint</code>,
 * and
 * <code>firePropertyChange</code>
 * solely to improve performance.
 * If not overridden, these frequently called methods would execute code paths
 * that are unnecessary for the default tree cell renderer.
 * If you write your own renderer,
 * take care to weigh the benefits and
 * drawbacks of overriding these methods.
 *
 * <p>
 * <strong>Warning:</strong>
 * Serialized objects of this class will not be compatible with
 * future Swing releases. The current serialization support is
 * appropriate for short term storage or RMI between applications running
 * the same version of Swing.  As of 1.4, support for long term storage
 * of all JavaBeans
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author Rob Davis
 * @author Ray Ryan
 * @author Scott Violet
 */
@SuppressWarnings("serial") // Same-version serialization only
public class DefaultTreeCellRenderer extends JLabel implements TreeCellRenderer
{
    Last tree the renderer was painted in. /** Last tree the renderer was painted in. */
    private JTree tree;

    Is the value currently selected. /** Is the value currently selected. */
    protected boolean selected;
    True if has focus. /** True if has focus. */
    protected boolean hasFocus;
    True if draws focus border around icon as well. /** True if draws focus border around icon as well. */
    private boolean drawsFocusBorderAroundIcon;
    If true, a dashed line is drawn as the focus indicator. /** If true, a dashed line is drawn as the focus indicator. */
    private boolean drawDashedFocusIndicator;

    // If drawDashedFocusIndicator is true, the following are used.
    Background color of the tree.
/**
     * Background color of the tree.
     */
    private Color treeBGColor;
    Color to draw the focus indicator in, determined from the background.
color.
/**
     * Color to draw the focus indicator in, determined from the background.
     * color.
     */
    private Color focusBGColor;

    // Icons
    Icon used to show non-leaf nodes that aren't expanded. /** Icon used to show non-leaf nodes that aren't expanded. */
    protected transient Icon closedIcon;

    Icon used to show leaf nodes. /** Icon used to show leaf nodes. */
    protected transient Icon leafIcon;

    Icon used to show non-leaf nodes that are expanded. /** Icon used to show non-leaf nodes that are expanded. */
    protected transient Icon openIcon;

    // Colors
    Color to use for the foreground for selected nodes. /** Color to use for the foreground for selected nodes. */
    protected Color textSelectionColor;

    Color to use for the foreground for non-selected nodes. /** Color to use for the foreground for non-selected nodes. */
    protected Color textNonSelectionColor;

    Color to use for the background when a node is selected. /** Color to use for the background when a node is selected. */
    protected Color backgroundSelectionColor;

    Color to use for the background when the node isn't selected. /** Color to use for the background when the node isn't selected. */
    protected Color backgroundNonSelectionColor;

    Color to use for the focus indicator when the node has focus. /** Color to use for the focus indicator when the node has focus. */
    protected Color borderSelectionColor;

    private boolean isDropCell;
    private boolean fillBackground;

    Set to true after the constructor has run.
/**
     * Set to true after the constructor has run.
     */
    private boolean inited;

    Creates a DefaultTreeCellRenderer. Icons and text color are determined from the UIManager. /**
     * Creates a {@code DefaultTreeCellRenderer}. Icons and text color are
     * determined from the {@code UIManager}.
     */
    public DefaultTreeCellRenderer() {
        inited = true;
    }

    {@inheritDoc}
Since: 1.7/**
     * {@inheritDoc}
     *
     * @since 1.7
     */
    public void updateUI() {
        super.updateUI();
        // To avoid invoking new methods from the constructor, the
        // inited field is first checked. If inited is false, the constructor
        // has not run and there is no point in checking the value. As
        // all look and feels have a non-null value for these properties,
        // a null value means the developer has specifically set it to
        // null. As such, if the value is null, this does not reset the
        // value.
        if (!inited || (getLeafIcon() instanceof UIResource)) {
            setLeafIcon(DefaultLookup.getIcon(this, ui, "Tree.leafIcon"));
        }
        if (!inited || (getClosedIcon() instanceof UIResource)) {
            setClosedIcon(DefaultLookup.getIcon(this, ui, "Tree.closedIcon"));
        }
        if (!inited || (getOpenIcon() instanceof UIResource)) {
            setOpenIcon(DefaultLookup.getIcon(this, ui, "Tree.openIcon"));
        }
        if (!inited || (getTextSelectionColor() instanceof UIResource)) {
            setTextSelectionColor(
                    DefaultLookup.getColor(this, ui, "Tree.selectionForeground"));
        }
        if (!inited || (getTextNonSelectionColor() instanceof UIResource)) {
            setTextNonSelectionColor(
                    DefaultLookup.getColor(this, ui, "Tree.textForeground"));
        }
        if (!inited || (getBackgroundSelectionColor() instanceof UIResource)) {
            setBackgroundSelectionColor(
                    DefaultLookup.getColor(this, ui, "Tree.selectionBackground"));
        }
        if (!inited ||
                (getBackgroundNonSelectionColor() instanceof UIResource)) {
            setBackgroundNonSelectionColor(
                    DefaultLookup.getColor(this, ui, "Tree.textBackground"));
        }
        if (!inited || (getBorderSelectionColor() instanceof UIResource)) {
            setBorderSelectionColor(
                    DefaultLookup.getColor(this, ui, "Tree.selectionBorderColor"));
        }
        drawsFocusBorderAroundIcon = DefaultLookup.getBoolean(
                this, ui, "Tree.drawsFocusBorderAroundIcon", false);
        drawDashedFocusIndicator = DefaultLookup.getBoolean(
                this, ui, "Tree.drawDashedFocusIndicator", false);

        fillBackground = DefaultLookup.getBoolean(this, ui, "Tree.rendererFillBackground", true);
        if (!inited || getBorder() instanceof UIResource)  {
            Insets margins = DefaultLookup.getInsets(this, ui, "Tree.rendererMargins");
            if (margins != null) {
                setBorder(new EmptyBorderUIResource(margins));
            } else {
                setBorder(new EmptyBorderUIResource(0, 0, 0, 0));
            }
        }

        setName("Tree.cellRenderer");
    }


    Returns the default icon, for the current laf, that is used to
represent non-leaf nodes that are expanded.
Returns: the default icon, for the current laf, that is used to
        represent non-leaf nodes that are expanded./**
      * Returns the default icon, for the current laf, that is used to
      * represent non-leaf nodes that are expanded.
      *
      * @return the default icon, for the current laf, that is used to
      *         represent non-leaf nodes that are expanded.
      */
    public Icon getDefaultOpenIcon() {
        return DefaultLookup.getIcon(this, ui, "Tree.openIcon");
    }

    Returns the default icon, for the current laf, that is used to
represent non-leaf nodes that are not expanded.
Returns: the default icon, for the current laf, that is used to
        represent non-leaf nodes that are not expanded./**
      * Returns the default icon, for the current laf, that is used to
      * represent non-leaf nodes that are not expanded.
      *
      * @return the default icon, for the current laf, that is used to
      *         represent non-leaf nodes that are not expanded.
      */
    public Icon getDefaultClosedIcon() {
        return DefaultLookup.getIcon(this, ui, "Tree.closedIcon");
    }

    Returns the default icon, for the current laf, that is used to
represent leaf nodes.
Returns: the default icon, for the current laf, that is used to
        represent leaf nodes./**
      * Returns the default icon, for the current laf, that is used to
      * represent leaf nodes.
      *
      * @return the default icon, for the current laf, that is used to
      *         represent leaf nodes.
      */
    public Icon getDefaultLeafIcon() {
        return DefaultLookup.getIcon(this, ui, "Tree.leafIcon");
    }

    Sets the icon used to represent non-leaf nodes that are expanded.
Params: newIcon – the icon to be used for expanded non-leaf nodes/**
      * Sets the icon used to represent non-leaf nodes that are expanded.
      *
      * @param newIcon the icon to be used for expanded non-leaf nodes
      */
    public void setOpenIcon(Icon newIcon) {
        openIcon = newIcon;
    }

    Returns the icon used to represent non-leaf nodes that are expanded.
Returns: the icon used to represent non-leaf nodes that are expanded/**
      * Returns the icon used to represent non-leaf nodes that are expanded.
      *
      * @return the icon used to represent non-leaf nodes that are expanded
      */
    public Icon getOpenIcon() {
        return openIcon;
    }

    Sets the icon used to represent non-leaf nodes that are not expanded.
Params: newIcon – the icon to be used for not expanded non-leaf nodes/**
      * Sets the icon used to represent non-leaf nodes that are not expanded.
      *
      * @param newIcon the icon to be used for not expanded non-leaf nodes
      */
    public void setClosedIcon(Icon newIcon) {
        closedIcon = newIcon;
    }

    Returns the icon used to represent non-leaf nodes that are not
expanded.
Returns: the icon used to represent non-leaf nodes that are not
        expanded/**
      * Returns the icon used to represent non-leaf nodes that are not
      * expanded.
      *
      * @return the icon used to represent non-leaf nodes that are not
      *         expanded
      */
    public Icon getClosedIcon() {
        return closedIcon;
    }

    Sets the icon used to represent leaf nodes.
Params: newIcon – icon to be used for leaf nodes/**
      * Sets the icon used to represent leaf nodes.
      *
      * @param newIcon icon to be used for leaf nodes
      */
    public void setLeafIcon(Icon newIcon) {
        leafIcon = newIcon;
    }

    Returns the icon used to represent leaf nodes.
Returns: the icon used to represent leaf nodes/**
      * Returns the icon used to represent leaf nodes.
      *
      * @return the icon used to represent leaf nodes
      */
    public Icon getLeafIcon() {
        return leafIcon;
    }

    Sets the color the text is drawn with when the node is selected.
Params: newColor – color to be used for text when the node is selected/**
      * Sets the color the text is drawn with when the node is selected.
      *
      * @param newColor color to be used for text when the node is selected
      */
    public void setTextSelectionColor(Color newColor) {
        textSelectionColor = newColor;
    }

    Returns the color the text is drawn with when the node is selected.
Returns: the color the text is drawn with when the node is selected/**
      * Returns the color the text is drawn with when the node is selected.
      *
      * @return the color the text is drawn with when the node is selected
      */
    public Color getTextSelectionColor() {
        return textSelectionColor;
    }

    Sets the color the text is drawn with when the node isn't selected.
Params: newColor – color to be used for text when the node isn't selected/**
      * Sets the color the text is drawn with when the node isn't selected.
      *
      * @param newColor color to be used for text when the node isn't selected
      */
    public void setTextNonSelectionColor(Color newColor) {
        textNonSelectionColor = newColor;
    }

    Returns the color the text is drawn with when the node isn't selected.
Returns: the color the text is drawn with when the node isn't selected./**
      * Returns the color the text is drawn with when the node isn't selected.
      *
      * @return the color the text is drawn with when the node isn't selected.
      */
    public Color getTextNonSelectionColor() {
        return textNonSelectionColor;
    }

    Sets the color to use for the background if node is selected.
Params: newColor – to be used for the background if the node is selected/**
      * Sets the color to use for the background if node is selected.
      *
      * @param newColor to be used for the background if the node is selected
      */
    public void setBackgroundSelectionColor(Color newColor) {
        backgroundSelectionColor = newColor;
    }


    Returns the color to use for the background if node is selected.
Returns: the color to use for the background if node is selected/**
      * Returns the color to use for the background if node is selected.
      *
      * @return the color to use for the background if node is selected
      */
    public Color getBackgroundSelectionColor() {
        return backgroundSelectionColor;
    }

    Sets the background color to be used for non selected nodes.
Params: newColor – color to be used for the background for non selected nodes/**
      * Sets the background color to be used for non selected nodes.
      *
      * @param newColor color to be used for the background for non selected nodes
      */
    public void setBackgroundNonSelectionColor(Color newColor) {
        backgroundNonSelectionColor = newColor;
    }

    Returns the background color to be used for non selected nodes.
Returns: the background color to be used for non selected nodes./**
      * Returns the background color to be used for non selected nodes.
      *
      * @return the background color to be used for non selected nodes.
      */
    public Color getBackgroundNonSelectionColor() {
        return backgroundNonSelectionColor;
    }

    Sets the color to use for the border.
Params: newColor – color to be used for the border/**
      * Sets the color to use for the border.
      *
      * @param newColor color to be used for the border
      */
    public void setBorderSelectionColor(Color newColor) {
        borderSelectionColor = newColor;
    }

    Returns the color the border is drawn.
Returns: the color the border is drawn/**
      * Returns the color the border is drawn.
      *
      * @return the color the border is drawn
      */
    public Color getBorderSelectionColor() {
        return borderSelectionColor;
    }

    Subclassed to map FontUIResources to null. If
font is null, or a FontUIResource, this
has the effect of letting the font of the JTree show
through. On the other hand, if font is non-null, and not
a FontUIResource, the font becomes font.
/**
     * Subclassed to map <code>FontUIResource</code>s to null. If
     * <code>font</code> is null, or a <code>FontUIResource</code>, this
     * has the effect of letting the font of the JTree show
     * through. On the other hand, if <code>font</code> is non-null, and not
     * a <code>FontUIResource</code>, the font becomes <code>font</code>.
     */
    public void setFont(Font font) {
        if(font instanceof FontUIResource)
            font = null;
        super.setFont(font);
    }

    Gets the font of this component.
Returns: this component's font; if a font has not been set
for this component, the font of its parent is returned/**
     * Gets the font of this component.
     * @return this component's font; if a font has not been set
     * for this component, the font of its parent is returned
     */
    public Font getFont() {
        Font font = super.getFont();

        if (font == null && tree != null) {
            // Strive to return a non-null value, otherwise the html support
            // will typically pick up the wrong font in certain situations.
            font = tree.getFont();
        }
        return font;
    }

    Subclassed to map ColorUIResources to null. If
color is null, or a ColorUIResource, this
has the effect of letting the background color of the JTree show
through. On the other hand, if color is non-null, and not
a ColorUIResource, the background becomes
color.
/**
     * Subclassed to map <code>ColorUIResource</code>s to null. If
     * <code>color</code> is null, or a <code>ColorUIResource</code>, this
     * has the effect of letting the background color of the JTree show
     * through. On the other hand, if <code>color</code> is non-null, and not
     * a <code>ColorUIResource</code>, the background becomes
     * <code>color</code>.
     */
    public void setBackground(Color color) {
        if(color instanceof ColorUIResource)
            color = null;
        super.setBackground(color);
    }

    Configures the renderer based on the passed in components.
The value is set from messaging the tree with
convertValueToText, which ultimately invokes
toString on value.
The foreground color is set based on the selection and the icon
is set based on the leaf and expanded
parameters.
/**
      * Configures the renderer based on the passed in components.
      * The value is set from messaging the tree with
      * <code>convertValueToText</code>, which ultimately invokes
      * <code>toString</code> on <code>value</code>.
      * The foreground color is set based on the selection and the icon
      * is set based on the <code>leaf</code> and <code>expanded</code>
      * parameters.
      */
    public Component getTreeCellRendererComponent(JTree tree, Object value,
                                                  boolean sel,
                                                  boolean expanded,
                                                  boolean leaf, int row,
                                                  boolean hasFocus) {
        String         stringValue = tree.convertValueToText(value, sel,
                                          expanded, leaf, row, hasFocus);

        this.tree = tree;
        this.hasFocus = hasFocus;
        setText(stringValue);

        Color fg = null;
        isDropCell = false;

        JTree.DropLocation dropLocation = tree.getDropLocation();
        if (dropLocation != null
                && dropLocation.getChildIndex() == -1
                && tree.getRowForPath(dropLocation.getPath()) == row) {

            Color col = DefaultLookup.getColor(this, ui, "Tree.dropCellForeground");
            if (col != null) {
                fg = col;
            } else {
                fg = getTextSelectionColor();
            }

            isDropCell = true;
        } else if (sel) {
            fg = getTextSelectionColor();
        } else {
            fg = getTextNonSelectionColor();
        }

        setForeground(fg);

        Icon icon = null;
        if (leaf) {
            icon = getLeafIcon();
        } else if (expanded) {
            icon = getOpenIcon();
        } else {
            icon = getClosedIcon();
        }

        if (!tree.isEnabled()) {
            setEnabled(false);
            LookAndFeel laf = UIManager.getLookAndFeel();
            Icon disabledIcon = laf.getDisabledIcon(tree, icon);
            if (disabledIcon != null) icon = disabledIcon;
            setDisabledIcon(icon);
        } else {
            setEnabled(true);
            setIcon(icon);
        }
        setComponentOrientation(tree.getComponentOrientation());

        selected = sel;

        return this;
    }

    Paints the value.  The background is filled based on selected.
/**
      * Paints the value.  The background is filled based on selected.
      */
    public void paint(Graphics g) {
        Color bColor;

        if (isDropCell) {
            bColor = DefaultLookup.getColor(this, ui, "Tree.dropCellBackground");
            if (bColor == null) {
                bColor = getBackgroundSelectionColor();
            }
        } else if (selected) {
            bColor = getBackgroundSelectionColor();
        } else {
            bColor = getBackgroundNonSelectionColor();
            if (bColor == null) {
                bColor = getBackground();
            }
        }

        int imageOffset = -1;
        if (bColor != null && fillBackground) {
            imageOffset = getLabelStart();
            g.setColor(bColor);
            if(getComponentOrientation().isLeftToRight()) {
                g.fillRect(imageOffset, 0, getWidth() - imageOffset,
                           getHeight());
            } else {
                g.fillRect(0, 0, getWidth() - imageOffset,
                           getHeight());
            }
        }

        if (hasFocus) {
            if (drawsFocusBorderAroundIcon) {
                imageOffset = 0;
            }
            else if (imageOffset == -1) {
                imageOffset = getLabelStart();
            }
            if(getComponentOrientation().isLeftToRight()) {
                paintFocus(g, imageOffset, 0, getWidth() - imageOffset,
                           getHeight(), bColor);
            } else {
                paintFocus(g, 0, 0, getWidth() - imageOffset, getHeight(), bColor);
            }
        }
        super.paint(g);
    }

    private void paintFocus(Graphics g, int x, int y, int w, int h, Color notColor) {
        Color       bsColor = getBorderSelectionColor();

        if (bsColor != null && (selected || !drawDashedFocusIndicator)) {
            g.setColor(bsColor);
            g.drawRect(x, y, w - 1, h - 1);
        }
        if (drawDashedFocusIndicator && notColor != null) {
            if (treeBGColor != notColor) {
                treeBGColor = notColor;
                focusBGColor = new Color(~notColor.getRGB());
            }
            g.setColor(focusBGColor);
            BasicGraphicsUtils.drawDashedRect(g, x, y, w, h);
        }
    }

    private int getLabelStart() {
        Icon currentI = getIcon();
        if(currentI != null && getText() != null) {
            return currentI.getIconWidth() + Math.max(0, getIconTextGap() - 1);
        }
        return 0;
    }

    Overrides JComponent.getPreferredSize to
return slightly wider preferred size value.
/**
     * Overrides <code>JComponent.getPreferredSize</code> to
     * return slightly wider preferred size value.
     */
    public Dimension getPreferredSize() {
        Dimension        retDimension = super.getPreferredSize();

        if(retDimension != null)
            retDimension = new Dimension(retDimension.width + 3,
                                         retDimension.height);
        return retDimension;
    }

   Overridden for performance reasons.
See the Implementation Note
for more information.
/**
    * Overridden for performance reasons.
    * See the <a href="#override">Implementation Note</a>
    * for more information.
    */
    public void validate() {}

   Overridden for performance reasons.
See the Implementation Note
for more information.
Since: 1.5/**
    * Overridden for performance reasons.
    * See the <a href="#override">Implementation Note</a>
    * for more information.
    *
    * @since 1.5
    */
    public void invalidate() {}

   Overridden for performance reasons.
See the Implementation Note
for more information.
/**
    * Overridden for performance reasons.
    * See the <a href="#override">Implementation Note</a>
    * for more information.
    */
    public void revalidate() {}

   Overridden for performance reasons.
See the Implementation Note
for more information.
/**
    * Overridden for performance reasons.
    * See the <a href="#override">Implementation Note</a>
    * for more information.
    */
    public void repaint(long tm, int x, int y, int width, int height) {}

   Overridden for performance reasons.
See the Implementation Note
for more information.
/**
    * Overridden for performance reasons.
    * See the <a href="#override">Implementation Note</a>
    * for more information.
    */
    public void repaint(Rectangle r) {}

   Overridden for performance reasons.
See the Implementation Note
for more information.
Since: 1.5/**
    * Overridden for performance reasons.
    * See the <a href="#override">Implementation Note</a>
    * for more information.
    *
    * @since 1.5
    */
    public void repaint() {}

   Overridden for performance reasons.
See the Implementation Note
for more information.
/**
    * Overridden for performance reasons.
    * See the <a href="#override">Implementation Note</a>
    * for more information.
    */
    protected void firePropertyChange(String propertyName, Object oldValue, Object newValue) {
        // Strings get interned...
        if (propertyName == "text"
            || ((SwingUtilities2.isScaleChanged(propertyName, oldValue, newValue)
                    || propertyName == "font" || propertyName == "foreground")
                && oldValue != newValue
                && getClientProperty(javax.swing.plaf.basic.BasicHTML.propertyKey) != null)) {

            super.firePropertyChange(propertyName, oldValue, newValue);
        }
    }

   Overridden for performance reasons.
See the Implementation Note
for more information.
/**
    * Overridden for performance reasons.
    * See the <a href="#override">Implementation Note</a>
    * for more information.
    */
    public void firePropertyChange(String propertyName, byte oldValue, byte newValue) {}

   Overridden for performance reasons.
See the Implementation Note
for more information.
/**
    * Overridden for performance reasons.
    * See the <a href="#override">Implementation Note</a>
    * for more information.
    */
    public void firePropertyChange(String propertyName, char oldValue, char newValue) {}

   Overridden for performance reasons.
See the Implementation Note
for more information.
/**
    * Overridden for performance reasons.
    * See the <a href="#override">Implementation Note</a>
    * for more information.
    */
    public void firePropertyChange(String propertyName, short oldValue, short newValue) {}

   Overridden for performance reasons.
See the Implementation Note
for more information.
/**
    * Overridden for performance reasons.
    * See the <a href="#override">Implementation Note</a>
    * for more information.
    */
    public void firePropertyChange(String propertyName, int oldValue, int newValue) {}

   Overridden for performance reasons.
See the Implementation Note
for more information.
/**
    * Overridden for performance reasons.
    * See the <a href="#override">Implementation Note</a>
    * for more information.
    */
    public void firePropertyChange(String propertyName, long oldValue, long newValue) {}

   Overridden for performance reasons.
See the Implementation Note
for more information.
/**
    * Overridden for performance reasons.
    * See the <a href="#override">Implementation Note</a>
    * for more information.
    */
    public void firePropertyChange(String propertyName, float oldValue, float newValue) {}

   Overridden for performance reasons.
See the Implementation Note
for more information.
/**
    * Overridden for performance reasons.
    * See the <a href="#override">Implementation Note</a>
    * for more information.
    */
    public void firePropertyChange(String propertyName, double oldValue, double newValue) {}

   Overridden for performance reasons.
See the Implementation Note
for more information.
/**
    * Overridden for performance reasons.
    * See the <a href="#override">Implementation Note</a>
    * for more information.
    */
    public void firePropertyChange(String propertyName, boolean oldValue, boolean newValue) {}

}
Property	Key
"leafIcon"	"Tree.leafIcon"
"closedIcon"	"Tree.closedIcon"
"openIcon"	"Tree.openIcon"
"textSelectionColor"	"Tree.selectionForeground"
"textNonSelectionColor"	"Tree.textForeground"
"backgroundSelectionColor"	"Tree.selectionBackground"
"backgroundNonSelectionColor"	"Tree.textBackground"
"borderSelectionColor"	"Tree.selectionBorderColor"
/

java/ 17/ java.desktop/javax/swing/tree/DefaultTreeCellRenderer.java
