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1 files changed, 584 insertions, 0 deletions

diff --git a/libjava/classpath/javax/swing/border/BevelBorder.java b/libjava/classpath/javax/swing/border/BevelBorder.java
new file mode 100644
index 000000000..b91961d66
--- /dev/null
+++ b/libjava/classpath/javax/swing/border/BevelBorder.java
@@ -0,0 +1,584 @@
+/* BevelBorder.java --
+   Copyright (C) 2003 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.border;
+
+import java.awt.Color;
+import java.awt.Component;
+import java.awt.Graphics;
+import java.awt.Insets;
+
+
+/**
+ * A rectangular, two pixel thick border that causes the enclosed area
+ * to appear as if it was raising out of or lowered into the screen. Some
+ * LookAndFeels use this kind of border for rectangular buttons.
+ *
+ * <p>A BevelBorder has a highlight and a shadow color. In the raised
+ * variant, the highlight color is used for the top and left edges,
+ * and the shadow color is used for the bottom and right edge. For an
+ * image, see the documentation of the individual constructors.
+ *
+ * @author Sascha Brawer (brawer@dandelis.ch)
+ */
+public class BevelBorder extends AbstractBorder
+{
+  /**
+   * Determined using the <code>serialver</code> tool
+   * of Apple/Sun JDK 1.3.1 on MacOS X 10.1.5.
+   */
+  static final long serialVersionUID = -1034942243356299676L;
+
+
+  /**
+   * Indicates that the BevelBorder looks like if the enclosed area was
+   * raising out of the screen.
+   */
+  public static final int RAISED = 0;
+
+
+  /**
+   * Indicates that the BevelBorder looks like if the enclosed area was
+   * pressed into the screen.
+   */
+  public static final int LOWERED = 1;
+
+
+  /**
+   * The type of this BevelBorder, which is either {@link #RAISED}
+   * or {@link #LOWERED}.
+   */
+  protected int bevelType;
+
+
+  /**
+   * The outer highlight color, or <code>null</code> to indicate that
+   * the color shall be derived from the background of the component
+   * whose border is being painted.
+   */
+  protected Color highlightOuter;
+
+
+  /**
+   * The inner highlight color, or <code>null</code> to indicate that
+   * the color shall be derived from the background of the component
+   * whose border is being painted.
+   */
+  protected Color highlightInner;
+
+
+  /**
+   * The outer shadow color, or <code>null</code> to indicate that the
+   * color shall be derived from the background of the component whose
+   * border is being painted.
+   */
+  protected Color shadowOuter;
+
+
+  /**
+   * The inner shadow color, or <code>null</code> to indicate that the
+   * color shall be derived from the background of the component whose
+   * border is being painted.
+   */
+  protected Color shadowInner;
+
+
+  /**
+   * Constructs a BevelBorder whose colors will be derived from the
+   * background of the enclosed component. The background color is
+   * retrieved each time the border is painted, so a BevelBorder
+   * constructed by this method will automatically reflect a change
+   * to the component&#x2019;s background color.
+   *
+   * <p><img src="doc-files/BevelBorder-1.png" width="500" height="150"
+   * alt="[An illustration showing raised and lowered BevelBorders]" />
+   *
+   * @param bevelType the desired appearance of the border. The value
+   *        must be either {@link #RAISED} or {@link #LOWERED}.
+   *
+   * @throws IllegalArgumentException if <code>bevelType</code> has
+   *         an unsupported value.
+   */
+  public BevelBorder(int bevelType)
+  {
+    if ((bevelType != RAISED) && (bevelType != LOWERED))
+      throw new IllegalArgumentException();
+
+    this.bevelType = bevelType;
+  }
+
+
+  /**
+   * Constructs a BevelBorder given its appearance type and two colors
+   * for its highlight and shadow.
+   *
+   * <p><img src="doc-files/BevelBorder-2.png" width="500" height="150"
+   * alt="[An illustration showing BevelBorders that were constructed
+   * with this method]" />
+   *
+   * @param bevelType the desired appearance of the border. The value
+   *        must be either {@link #RAISED} or {@link #LOWERED}.
+   *
+   * @param highlight the color that will be used for the inner
+   *        side of the highlighted edges (top and left if
+   *        if <code>bevelType</code> is {@link #RAISED}; bottom
+   *        and right otherwise). The color for the outer side
+   *        is a brightened version of this color.
+   *
+   * @param shadow the color that will be used for the outer
+   *        side of the shadowed edges (bottom and right
+   *        if <code>bevelType</code> is {@link #RAISED}; top
+   *        and left otherwise). The color for the inner side
+   *        is a brightened version of this color.
+   *
+   * @throws IllegalArgumentException if <code>bevelType</code> has
+   *         an unsupported value.
+   *
+   * @throws NullPointerException if <code>highlight</code> or
+   *         <code>shadow</code> is <code>null</code>.
+   *
+   * @see java.awt.Color#brighter()
+   */
+  public BevelBorder(int bevelType, Color highlight, Color shadow)
+  {
+    this(bevelType,
+         /* highlightOuter */ highlight.brighter(),
+         /* highlightInner */ highlight,
+         /* shadowOuter */    shadow,
+         /* shadowInner */    shadow.brighter());
+  }
+
+
+  /**
+   * Constructs a BevelBorder given its appearance type and all
+   * colors.
+   *
+   * <p><img src="doc-files/BevelBorder-3.png" width="500" height="150"
+   * alt="[An illustration showing BevelBorders that were constructed
+   * with this method]" />
+   *
+   * @param bevelType the desired appearance of the border. The value
+   *        must be either {@link #RAISED} or {@link #LOWERED}.
+   *
+   * @param highlightOuter the color that will be used for the outer
+   *        side of the highlighted edges (top and left if
+   *        <code>bevelType</code> is {@link #RAISED}; bottom and
+   *        right otherwise).
+   *
+   * @param highlightInner the color that will be used for the inner
+   *        side of the highlighted edges.
+   *
+   * @param shadowOuter the color that will be used for the outer
+   *        side of the shadowed edges (bottom and right
+   *        if <code>bevelType</code> is {@link #RAISED}; top
+   *        and left otherwise).
+   *
+   * @param shadowInner the color that will be used for the inner
+   *        side of the shadowed edges.
+   *
+   * @throws IllegalArgumentException if <code>bevelType</code> has
+   *         an unsupported value.
+   *
+   * @throws NullPointerException if one of the passed colors
+   *         is <code>null</code>.
+   */
+  public BevelBorder(int bevelType,
+                     Color highlightOuter, Color highlightInner,
+                     Color shadowOuter, Color shadowInner)
+  {
+    this(bevelType); // checks the validity of bevelType
+
+    if ((highlightOuter == null) || (highlightInner == null)
+        || (shadowOuter == null) || (shadowInner == null))
+      throw new NullPointerException();
+
+    this.highlightOuter = highlightOuter;
+    this.highlightInner = highlightInner;
+    this.shadowOuter = shadowOuter;
+    this.shadowInner = shadowInner;
+  }
+
+
+  /**
+   * Paints the border for a given component.
+   *
+   * @param c the component whose border is to be painted.
+   * @param g the graphics for painting.
+   * @param x the horizontal position for painting the border.
+   * @param y the vertical position for painting the border.
+   * @param width the width of the available area for painting the border.
+   * @param height the height of the available area for painting the border.
+   */
+  public void paintBorder(Component c, Graphics  g,
+                          int x, int y, int width, int height)
+  {
+    switch (bevelType)
+    {
+    case RAISED:
+      paintRaisedBevel(c, g, x, y, width, height);
+      break;
+
+    case LOWERED:
+      paintLoweredBevel(c, g, x, y, width, height);
+      break;
+    }
+  }
+
+
+  /**
+   * Measures the width of this border.
+   *
+   * @param c the component whose border is to be measured.
+   *
+   * @return an Insets object whose <code>left</code>, <code>right</code>,
+   *         <code>top</code> and <code>bottom</code> fields indicate the
+   *         width of the border at the respective edge.
+   *
+   * @see #getBorderInsets(java.awt.Component, java.awt.Insets)
+   */
+  public Insets getBorderInsets(Component c)
+  {
+    return new Insets(2, 2, 2, 2);
+  }
+
+
+  /**
+   * Measures the width of this border, storing the results into a
+   * pre-existing Insets object.
+   *
+   * @param insets an Insets object for holding the result values.
+   *        After invoking this method, the <code>left</code>,
+   *        <code>right</code>, <code>top</code> and
+   *        <code>bottom</code> fields indicate the width of the
+   *        border at the respective edge.
+   *
+   * @return the same object that was passed for <code>insets</code>.
+   *
+   * @see #getBorderInsets(Component)
+   */
+  public Insets getBorderInsets(Component c, Insets insets)
+  {
+    insets.left = insets.right = insets.top = insets.bottom = 2;
+    return insets;
+  }
+
+
+  /**
+   * Determines the color that will be used for the outer side of
+   * highlighted edges when painting the border.  If a highlight color
+   * has been specified upon constructing the border, that color is
+   * returned. Otherwise, the inner highlight color is brightened.
+   *
+   * @param c the component enclosed by this border.
+   *
+   * @return The color.
+   *
+   * @see #getHighlightInnerColor(java.awt.Component)
+   * @see java.awt.Color#brighter()
+   */
+  public Color getHighlightOuterColor(Component c)
+  {
+    if (highlightOuter != null)
+      return highlightOuter;
+    else
+      return getHighlightInnerColor(c).brighter();
+  }
+
+
+  /**
+   * Determines the color that will be used for the inner side of
+   * highlighted edges when painting the border. If a highlight color
+   * has been specified upon constructing the border, that color is
+   * returned. Otherwise, the background color of the enclosed
+   * component is brightened.
+   *
+   * @param c the component enclosed by this border.
+   *
+   * @return The color.
+   *
+   * @see java.awt.Component#getBackground()
+   * @see java.awt.Color#brighter()
+   */
+  public Color getHighlightInnerColor(Component c)
+  {
+    if (highlightInner != null)
+      return highlightInner;
+    else
+      return c.getBackground().brighter();
+  }
+
+
+  /**
+   * Determines the color that will be used for the inner side of
+   * shadowed edges when painting the border. If a shadow color has
+   * been specified upon constructing the border, that color is
+   * returned. Otherwise, the background color of the enclosed
+   * component is darkened.
+   *
+   * @param c the component enclosed by this border.
+   *
+   * @return The color.
+   *
+   * @see java.awt.Component#getBackground()
+   * @see java.awt.Color#darker()
+   */
+  public Color getShadowInnerColor(Component c)
+  {
+    if (shadowInner != null)
+      return shadowInner;
+    else
+      return c.getBackground().darker();
+  }
+
+
+  /**
+   * Determines the color that will be used for the outer side of
+   * shadowed edges when painting the border.  If a shadow color
+   * has been specified upon constructing the border, that color is
+   * returned. Otherwise, the inner shadow color is darkened.
+   *
+   * @param c the component enclosed by this border.
+   *
+   * @return The color.
+   *
+   * @see #getShadowInnerColor(java.awt.Component)
+   * @see java.awt.Color#darker()
+   */
+  public Color getShadowOuterColor(Component c)
+  {
+    if (shadowOuter != null)
+      return shadowOuter;
+    else
+      return getShadowInnerColor(c).darker();
+  }
+
+
+  /**
+   * Returns the color that will be used for the outer side of
+   * highlighted edges when painting the border, or <code>null</code>
+   * if that color will be derived from the background of the enclosed
+   * Component.
+   *
+   * @return The color (possibly <code>null</code>).
+   */
+  public Color getHighlightOuterColor()
+  {
+    return highlightOuter;
+  }
+
+
+  /**
+   * Returns the color that will be used for the inner side of
+   * highlighted edges when painting the border, or <code>null</code>
+   * if that color will be derived from the background of the enclosed
+   * Component.
+   *
+   * @return The color (possibly <code>null</code>).
+   */
+  public Color getHighlightInnerColor()
+  {
+    return highlightInner;
+  }
+
+
+  /**
+   * Returns the color that will be used for the inner side of
+   * shadowed edges when painting the border, or <code>null</code> if
+   * that color will be derived from the background of the enclosed
+   * Component.
+   *
+   * @return The color (possibly <code>null</code>).
+   */
+  public Color getShadowInnerColor()
+  {
+    return shadowInner;
+  }
+
+
+  /**
+   * Returns the color that will be used for the outer side of
+   * shadowed edges when painting the border, or <code>null</code> if
+   * that color will be derived from the background of the enclosed
+   * Component.
+   *
+   * @return The color (possibly <code>null</code>).
+   */
+  public Color getShadowOuterColor()
+  {
+    return shadowOuter;
+  }
+
+
+  /**
+   * Returns the appearance of this border, which is either {@link
+   * #RAISED} or {@link #LOWERED}.
+   *
+   * @return The bevel type ({@link #RAISED} or {@link #LOWERED}).
+   */
+  public int getBevelType()
+  {
+    return bevelType;
+  }
+
+
+  /**
+   * Determines whether this border fills every pixel in its area
+   * when painting.
+   *
+   * <p>If the border colors are derived from the background color of
+   * the enclosed component, the result is <code>true</code> because
+   * the derivation method always returns opaque colors. Otherwise,
+   * the result depends on the opacity of the individual colors.
+   *
+   * @return <code>true</code> if the border is fully opaque, or
+   *         <code>false</code> if some pixels of the background
+   *         can shine through the border.
+   */
+  public boolean isBorderOpaque()
+  {
+    /* If the colors are to be drived from the enclosed Component's
+     * background color, the border is guaranteed to be fully opaque
+     * because Color.brighten() and Color.darken() always return an
+     * opaque color.
+     */
+    return
+      ((highlightOuter == null) || (highlightOuter.getAlpha() == 255))
+      && ((highlightInner == null) || (highlightInner.getAlpha() == 255))
+      && ((shadowInner == null) || (shadowInner.getAlpha() == 255))
+      && ((shadowOuter == null) || (shadowOuter.getAlpha() == 255));
+  }
+
+
+  /**
+   * Paints a raised bevel border around a component.
+   *
+   * @param c the component whose border is to be painted.
+   * @param g the graphics for painting.
+   * @param x the horizontal position for painting the border.
+   * @param y the vertical position for painting the border.
+   * @param width the width of the available area for painting the border.
+   * @param height the height of the available area for painting the border.
+   */
+  protected void paintRaisedBevel(Component c, Graphics g,
+                                  int x, int y, int width, int height)
+  {
+    paintBevel(g, x, y, width, height,
+               getHighlightOuterColor(c), getHighlightInnerColor(c),
+               getShadowInnerColor(c), getShadowOuterColor(c));
+  }
+
+
+  /**
+   * Paints a lowered bevel border around a component.
+   *
+   * @param c the component whose border is to be painted.
+   * @param g the graphics for painting.
+   * @param x the horizontal position for painting the border.
+   * @param y the vertical position for painting the border.
+   * @param width the width of the available area for painting the border.
+   * @param height the height of the available area for painting the border.
+   */
+  protected void paintLoweredBevel(Component c, Graphics g,
+                                   int x, int y, int width, int height)
+  {
+    paintBevel(g, x, y, width, height,
+               getShadowInnerColor(c), getShadowOuterColor(c),
+               getHighlightInnerColor(c), getHighlightOuterColor(c));
+  }
+
+
+  /**
+   * Paints a two-pixel bevel in four colors.
+   *
+   * <pre>
+   * ++++++++++++
+   * +..........#    + = color a
+   * +.        X#    . = color b
+   * +.        X#    X = color c
+   * +.XXXXXXXXX#    # = color d
+   * ############</pre>
+   *
+   * @param g the graphics for painting.
+   * @param x the horizontal position for painting the border.
+   * @param y the vertical position for painting the border.
+   * @param width the width of the available area for painting the border.
+   * @param height the height of the available area for painting the border.
+   * @param a the color for the outer side of the top and left edges.
+   * @param b the color for the inner side of the top and left edges.
+   * @param c the color for the inner side of the bottom and right edges.
+   * @param d the color for the outer side of the bottom and right edges.
+   */
+  private static void paintBevel(Graphics g,
+                                 int x, int y, int width, int height,
+                                 Color a, Color b, Color c, Color d)
+  {
+    Color oldColor;
+
+    oldColor = g.getColor();
+    g.translate(x, y);
+    width = width - 1;
+    height = height - 1;
+
+    try
+    {
+      /* To understand this code, it might be helpful to look at the
+       * images that are included with the JavaDoc. They are located
+       * in the "doc-files" subdirectory.
+       */
+      g.setColor(a);
+      g.drawLine(0, 0, width, 0);                       // a, horizontal
+      g.drawLine(0, 1, 0, height);                      // a, vertical
+
+      g.setColor(b);
+      g.drawLine(1, 1, width - 1, 1);                   // b, horizontal
+      g.drawLine(1, 2, 1, height - 1);                  // b, vertical
+
+      g.setColor(c);
+      g.drawLine(2, height - 1, width - 1, height - 1); // c, horizontal
+      g.drawLine(width - 1, 2, width - 1, height - 2);  // c, vertical
+
+      g.setColor(d);
+      g.drawLine(1, height, width, height);             // d, horizontal
+      g.drawLine(width, 1, width, height - 1);          // d, vertical
+    }
+    finally
+    {
+      g.translate(-x, -y);
+      g.setColor(oldColor);
+    }
+  }
+}