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1 files changed, 422 insertions, 0 deletions

diff --git a/libjava/classpath/javax/swing/plaf/basic/BasicArrowButton.java b/libjava/classpath/javax/swing/plaf/basic/BasicArrowButton.java
new file mode 100644
index 000000000..1d6e8874d
--- /dev/null
+++ b/libjava/classpath/javax/swing/plaf/basic/BasicArrowButton.java
@@ -0,0 +1,422 @@
+/* BasicArrowButton.java --
+   Copyright (C) 2004, 2005, 2006 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.Graphics;
+import java.awt.Polygon;
+
+import javax.swing.ButtonModel;
+import javax.swing.JButton;
+import javax.swing.SwingConstants;
+
+/**
+ * A button that displays an arrow (triangle) that points {@link #NORTH},
+ * {@link #SOUTH}, {@link #EAST} or {@link #WEST}.  This button is used by
+ * the {@link BasicComboBoxUI} class.
+ *
+ * @see BasicComboBoxUI#createArrowButton
+ */
+public class BasicArrowButton extends JButton implements SwingConstants
+{
+
+  /**
+   * The direction that the arrow points.
+   *
+   * @see #getDirection()
+   */
+  protected int direction;
+
+  /**
+   * The color the arrow is painted in if disabled and the bottom and right
+   * edges of the button.
+   * This is package-private to avoid an accessor method.
+   */
+  transient Color shadow = Color.GRAY;
+
+  /**
+   * The color the arrow is painted in if enabled and the bottom and right
+   * edges of the button.
+   * This is package-private to avoid an accessor method.
+   */
+  transient Color darkShadow = new Color(102, 102, 102);
+
+  /**
+   * The top and left edges of the button.
+   * This is package-private to avoid an accessor method.
+   */
+  transient Color highlight = Color.WHITE;
+
+  /**
+   * Creates a new <code>BasicArrowButton</code> object with an arrow pointing
+   * in the specified direction.  If the <code>direction</code> is not one of
+   * the specified constants, no arrow is drawn.
+   *
+   * @param direction The direction the arrow points in (one of:
+   * {@link #NORTH}, {@link #SOUTH}, {@link #EAST} and {@link #WEST}).
+   */
+  public BasicArrowButton(int direction)
+  {
+    super();
+    setDirection(direction);
+    setFocusable(false);
+  }
+
+  /**
+   * Creates a new BasicArrowButton object with the given colors and
+   * direction.
+   *
+   * @param direction The direction to point in (one of:
+   * {@link #NORTH}, {@link #SOUTH}, {@link #EAST} and {@link #WEST}).
+   * @param background The background color.
+   * @param shadow The shadow color.
+   * @param darkShadow The dark shadow color.
+   * @param highlight The highlight color.
+   */
+  public BasicArrowButton(int direction, Color background, Color shadow,
+                          Color darkShadow, Color highlight)
+  {
+    this(direction);
+    setBackground(background);
+    this.shadow = shadow;
+    this.darkShadow = darkShadow;
+    this.highlight = highlight;
+    setFocusable(false);
+  }
+
+  /**
+   * Returns whether the focus can traverse to this component.  This method
+   * always returns <code>false</code>.
+   *
+   * @return <code>false</code>.
+   */
+  public boolean isFocusTraversable()
+  {
+    return false;
+  }
+
+  /**
+   * Returns the direction of the arrow (one of: {@link #NORTH},
+   * {@link #SOUTH}, {@link #EAST} and {@link #WEST}).
+   *
+   * @return The direction of the arrow.
+   */
+  public int getDirection()
+  {
+    return direction;
+  }
+
+  /**
+   * Sets the direction of the arrow.
+   *
+   * @param dir The new direction of the arrow (one of: {@link #NORTH},
+   *            {@link #SOUTH}, {@link #EAST} and {@link #WEST}).
+   */
+  public void setDirection(int dir)
+  {
+    this.direction = dir;
+  }
+
+  /**
+   * Paints the arrow button. The painting is delegated to the
+   * paintTriangle method.
+   *
+   * @param g The Graphics object to paint with.
+   */
+  public void paint(Graphics g)
+  {
+    super.paint(g);
+
+    int height = getHeight();
+    int size = height / 4;
+
+    int x = (getWidth() - size) / 2;
+    int y = (height - size) / 2;
+
+    ButtonModel m = getModel();
+    if (m.isArmed())
+      {
+        x++;
+        y++;
+      }
+
+    paintTriangle(g, x, y, size, direction, isEnabled());
+  }
+
+  /**
+   * Returns the preferred size of the arrow button.
+   *
+   * @return The preferred size (always 16 x 16).
+   */
+  public Dimension getPreferredSize()
+  {
+    // since Dimension is NOT immutable, we must return a new instance
+    // every time (if we return a cached value, the caller might modify it)
+    // - tests show that the reference implementation does the same.
+    return new Dimension(16, 16);
+  }
+
+  /**
+   * Returns the minimum size of the arrow button.
+   *
+   * @return The minimum size (always 5 x 5).
+   */
+  public Dimension getMinimumSize()
+  {
+    // since Dimension is NOT immutable, we must return a new instance
+    // every time (if we return a cached value, the caller might modify it)
+    // - tests show that the reference implementation does the same.
+    return new Dimension(5, 5);
+  }
+
+  /**
+   * Returns the maximum size of the arrow button.
+   *
+   * @return The maximum size (always Integer.MAX_VALUE x Integer.MAX_VALUE).
+   */
+  public Dimension getMaximumSize()
+  {
+    // since Dimension is NOT immutable, we must return a new instance
+    // every time (if we return a cached value, the caller might modify it)
+    // - tests show that the reference implementation does the same.
+    return new Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE);
+  }
+
+  /**
+   * Paints a triangle with the given size, location and direction.  It is
+   * difficult to explain the rationale behind the positioning of the triangle
+   * relative to the given (x, y) position - by trial and error we seem to
+   * match the behaviour of the reference implementation (which is missing a
+   * specification for this method).
+   *
+   * @param g  the graphics device.
+   * @param x  the x-coordinate for the triangle's location.
+   * @param y  the y-coordinate for the triangle's location.
+   * @param size  the arrow size (depth).
+   * @param direction  the direction of the arrow (one of: {@link #NORTH},
+   *            {@link #SOUTH}, {@link #EAST} and {@link #WEST}).
+   * @param isEnabled  if <code>true</code> the arrow is drawn in the enabled
+   *                   state, otherwise it is drawn in the disabled state.
+   */
+  public void paintTriangle(Graphics g, int x, int y, int size, int direction,
+                            boolean isEnabled)
+  {
+    Color savedColor = g.getColor();
+    switch (direction)
+      {
+      case NORTH:
+        paintTriangleNorth(g, x, y, size, isEnabled);
+        break;
+      case SOUTH:
+        paintTriangleSouth(g, x, y, size, isEnabled);
+        break;
+      case LEFT:
+      case WEST:
+        paintTriangleWest(g, x, y, size, isEnabled);
+        break;
+      case RIGHT:
+      case EAST:
+        paintTriangleEast(g, x, y, size, isEnabled);
+        break;
+      }
+    g.setColor(savedColor);
+  }
+
+  /**
+   * Paints an upward-pointing triangle.  This method is called by the
+   * {@link #paintTriangle(Graphics, int, int, int, int, boolean)} method.
+   *
+   * @param g  the graphics device.
+   * @param x  the x-coordinate for the anchor point.
+   * @param y  the y-coordinate for the anchor point.
+   * @param size  the arrow size (depth).
+   * @param isEnabled  if <code>true</code> the arrow is drawn in the enabled
+   *                   state, otherwise it is drawn in the disabled state.
+   */
+  private void paintTriangleNorth(Graphics g, int x, int y, int size,
+          boolean isEnabled)
+  {
+    int tipX = x + (size - 2) / 2;
+    int tipY = y;
+    int baseX1 = tipX - (size - 1);
+    int baseX2 = tipX + (size - 1);
+    int baseY = y + (size - 1);
+    Polygon triangle = new Polygon();
+    triangle.addPoint(tipX, tipY);
+    triangle.addPoint(baseX1, baseY);
+    triangle.addPoint(baseX2, baseY);
+    if (isEnabled)
+     {
+       g.setColor(Color.DARK_GRAY);
+       g.fillPolygon(triangle);
+       g.drawPolygon(triangle);
+     }
+    else
+     {
+       g.setColor(Color.GRAY);
+       g.fillPolygon(triangle);
+       g.drawPolygon(triangle);
+       g.setColor(Color.WHITE);
+       g.drawLine(baseX1 + 1, baseY + 1, baseX2 + 1, baseY + 1);
+     }
+  }
+
+  /**
+   * Paints an downward-pointing triangle.  This method is called by the
+   * {@link #paintTriangle(Graphics, int, int, int, int, boolean)} method.
+   *
+   * @param g  the graphics device.
+   * @param x  the x-coordinate for the anchor point.
+   * @param y  the y-coordinate for the anchor point.
+   * @param size  the arrow size (depth).
+   * @param isEnabled  if <code>true</code> the arrow is drawn in the enabled
+   *                   state, otherwise it is drawn in the disabled state.
+   */
+  private void paintTriangleSouth(Graphics g, int x, int y, int size,
+          boolean isEnabled)
+  {
+    int tipX = x + (size - 2) / 2;
+    int tipY = y + (size - 1);
+    int baseX1 = tipX - (size - 1);
+    int baseX2 = tipX + (size - 1);
+    int baseY = y;
+    Polygon triangle = new Polygon();
+    triangle.addPoint(tipX, tipY);
+    triangle.addPoint(baseX1, baseY);
+    triangle.addPoint(baseX2, baseY);
+    if (isEnabled)
+     {
+       g.setColor(Color.DARK_GRAY);
+       g.fillPolygon(triangle);
+       g.drawPolygon(triangle);
+     }
+    else
+     {
+       g.setColor(Color.GRAY);
+       g.fillPolygon(triangle);
+       g.drawPolygon(triangle);
+       g.setColor(Color.WHITE);
+       g.drawLine(tipX + 1, tipY, baseX2, baseY + 1);
+       g.drawLine(tipX + 1, tipY + 1, baseX2 + 1, baseY + 1);
+     }
+  }
+
+  /**
+   * Paints a right-pointing triangle.  This method is called by the
+   * {@link #paintTriangle(Graphics, int, int, int, int, boolean)} method.
+   *
+   * @param g  the graphics device.
+   * @param x  the x-coordinate for the anchor point.
+   * @param y  the y-coordinate for the anchor point.
+   * @param size  the arrow size (depth).
+   * @param isEnabled  if <code>true</code> the arrow is drawn in the enabled
+   *                   state, otherwise it is drawn in the disabled state.
+   */
+  private void paintTriangleEast(Graphics g, int x, int y, int size,
+          boolean isEnabled)
+  {
+    int tipX = x + (size - 1);
+    int tipY = y + (size - 2) / 2;
+    int baseX = x;
+    int baseY1 = tipY - (size - 1);
+    int baseY2 = tipY + (size - 1);
+
+    Polygon triangle = new Polygon();
+    triangle.addPoint(tipX, tipY);
+    triangle.addPoint(baseX, baseY1);
+    triangle.addPoint(baseX, baseY2);
+    if (isEnabled)
+     {
+       g.setColor(Color.DARK_GRAY);
+       g.fillPolygon(triangle);
+       g.drawPolygon(triangle);
+     }
+    else
+     {
+       g.setColor(Color.GRAY);
+       g.fillPolygon(triangle);
+       g.drawPolygon(triangle);
+       g.setColor(Color.WHITE);
+       g.drawLine(baseX + 1, baseY2, tipX, tipY + 1);
+       g.drawLine(baseX + 1, baseY2 + 1, tipX + 1, tipY + 1);
+     }
+  }
+
+  /**
+   * Paints a left-pointing triangle.  This method is called by the
+   * {@link #paintTriangle(Graphics, int, int, int, int, boolean)} method.
+   *
+   * @param g  the graphics device.
+   * @param x  the x-coordinate for the anchor point.
+   * @param y  the y-coordinate for the anchor point.
+   * @param size  the arrow size (depth).
+   * @param isEnabled  if <code>true</code> the arrow is drawn in the enabled
+   *                   state, otherwise it is drawn in the disabled state.
+   */
+  private void paintTriangleWest(Graphics g, int x, int y, int size,
+          boolean isEnabled)
+  {
+    int tipX = x;
+    int tipY = y + (size - 2) / 2;
+    int baseX = x + (size - 1);
+    int baseY1 = tipY - (size - 1);
+    int baseY2 = tipY + (size - 1);
+
+    Polygon triangle = new Polygon();
+    triangle.addPoint(tipX, tipY);
+    triangle.addPoint(baseX, baseY1);
+    triangle.addPoint(baseX, baseY2);
+    if (isEnabled)
+     {
+       g.setColor(Color.DARK_GRAY);
+       g.fillPolygon(triangle);
+       g.drawPolygon(triangle);
+     }
+    else
+     {
+       g.setColor(Color.GRAY);
+       g.fillPolygon(triangle);
+       g.drawPolygon(triangle);
+       g.setColor(Color.WHITE);
+       g.drawLine(baseX + 1, baseY1 + 1, baseX + 1, baseY2 + 1);
+     }
+  }
+
+}