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+/* BasicArrowButton.java
+ Copyright (C) 2004 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., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 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.Component;
+import java.awt.Dimension;
+import java.awt.Graphics;
+import java.awt.Polygon;
+import java.awt.Rectangle;
+import javax.swing.Icon;
+import javax.swing.JButton;
+import javax.swing.SwingConstants;
+
+
+/**
+ * This class draws simple arrow buttons for the Basic Look and Feel.
+ */
+public class BasicArrowButton extends JButton implements SwingConstants
+{
+ /**
+ * A private helper class that draws icons.
+ */
+ private class arrowIcon implements Icon
+ {
+ /** The polygon that describes the icon. */
+ private Polygon arrow;
+
+ /** The size of the icon. */
+ private int size = 10;
+
+ /**
+ * Creates a new arrowIcon object using the given arrow polygon.
+ *
+ * @param arrow The polygon that describes the arrow.
+ */
+ public arrowIcon(Polygon arrow)
+ {
+ this.arrow = arrow;
+ }
+
+ /**
+ * Returns the height of the icon.
+ *
+ * @return The height of the icon.
+ */
+ public int getIconHeight()
+ {
+ return size;
+ }
+
+ /**
+ * Returns the width of the icon.
+ *
+ * @return The width of the icon.
+ */
+ public int getIconWidth()
+ {
+ return size;
+ }
+
+ /**
+ * Sets the size of the icon.
+ *
+ * @param size The size of the icon.
+ */
+ public void setSize(int size)
+ {
+ this.size = size;
+ }
+
+ /**
+ * Sets the arrow polygon.
+ *
+ * @param arrow The arrow polygon.
+ */
+ public void setArrow(Polygon arrow)
+ {
+ this.arrow = arrow;
+ }
+
+ /**
+ * Paints the icon.
+ *
+ * @param c The Component to paint for.
+ * @param g The Graphics object to draw with.
+ * @param x The X coordinate to draw at.
+ * @param y The Y coordinate to draw at.
+ */
+ public void paintIcon(Component c, Graphics g, int x, int y)
+ {
+ Color arrowColor;
+ if (c.isEnabled())
+ arrowColor = darkShadow;
+ else
+ arrowColor = shadow;
+
+ paintIconImpl(g, x, y, arrowColor);
+ }
+
+ /**
+ * This method does the actual painting work.
+ *
+ * @param g The Graphics object to paint with.
+ * @param x The x coordinate to paint at.
+ * @param y The y coordinate to paint at.
+ * @param arrowColor The color to paint the arrow with.
+ */
+ public void paintIconImpl(Graphics g, int x, int y, Color arrowColor)
+ {
+ g.translate(x, y);
+
+ Color saved = g.getColor();
+
+ g.setColor(arrowColor);
+
+ g.fillPolygon(arrow);
+
+ g.setColor(saved);
+ g.translate(-x, -y);
+ }
+ }
+
+ /** The direction to point in. */
+ protected int direction;
+
+ /** The color the arrow is painted in if disabled and the bottom and
+ * right edges of the button. */
+ private transient Color shadow = Color.BLACK;
+
+ /** The color the arrow is painted in if enabled and the bottom and
+ * right edges of the button. */
+ private transient Color darkShadow = Color.BLACK;
+
+ /** The top and left edges of the button. */
+ private transient Color highlight = Color.BLACK;
+
+ /**
+ * Creates a new BasicArrowButton object.
+ *
+ * @param direction The direction the arrow points in.
+ */
+ public BasicArrowButton(int direction)
+ {
+ super();
+ setDirection(direction);
+ }
+
+ /**
+ * Creates a new BasicArrowButton object with the given colors and
+ * direction.
+ *
+ * @param direction The direction to point in.
+ * @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;
+ }
+
+ /**
+ * This method returns the direction of the arrow.
+ *
+ * @return The direction of the arrow.
+ */
+ public int getDirection()
+ {
+ return direction;
+ }
+
+ /**
+ * This method changes the direction of the arrow.
+ *
+ * @param dir The new direction of the arrow.
+ */
+ public void setDirection(int dir)
+ {
+ Polygon arrow = getArrow(dir, 10);
+ if (getIcon() == null)
+ setIcon(new arrowIcon(arrow));
+ else
+ ((arrowIcon) getIcon()).setArrow(arrow);
+ this.direction = direction;
+ }
+
+ /**
+ * This method paints the arrow button.
+ *
+ * @param g The Graphics object to paint with.
+ */
+ public void paint(Graphics g)
+ {
+ super.paint(g);
+ Rectangle bounds = getBounds();
+
+ Color saved = g.getColor();
+ g.setColor(highlight);
+
+ g.drawLine(bounds.x, bounds.y, bounds.x, bounds.y + bounds.height);
+ g.drawLine(bounds.x, bounds.y, bounds.x + bounds.width, bounds.y);
+
+ g.setColor(shadow);
+
+ g.drawLine(bounds.x + 1, bounds.y + bounds.height - 1,
+ bounds.x + bounds.width - 1, bounds.y + bounds.height - 1);
+ g.drawLine(bounds.x + bounds.width - 1, bounds.y + 1,
+ bounds.x + bounds.width - 1, bounds.y + bounds.height - 1);
+
+ g.setColor(darkShadow);
+
+ g.drawLine(bounds.x, bounds.y + bounds.height, bounds.x + bounds.width,
+ bounds.y + bounds.height);
+ g.drawLine(bounds.x + bounds.width, bounds.y, bounds.x + bounds.width,
+ bounds.y + bounds.height);
+
+ g.setColor(saved);
+ }
+
+ /**
+ * This method returns the preferred size of the arrow button.
+ *
+ * @return The preferred size.
+ */
+ public Dimension getPreferredSize()
+ {
+ return new Dimension(getIcon().getIconWidth(), getIcon().getIconHeight());
+ }
+
+ /**
+ * This method returns the minimum size of the arrow button.
+ *
+ * @return The minimum size.
+ */
+ public Dimension getMinimumSize()
+ {
+ return getPreferredSize();
+ }
+
+ /**
+ * This method returns the maximum size of the arrow button.
+ *
+ * @return The maximum size.
+ */
+ public Dimension getMaximumSize()
+ {
+ return getPreferredSize();
+ }
+
+ /**
+ * The method paints a triangle with the given size and direction at
+ * the given x and y coordinates.
+ *
+ * @param g The Graphics object to paint with.
+ * @param x The x coordinate to paint at.
+ * @param y The y coordinate to paint at.
+ * @param size The size of the icon.
+ * @param direction The direction of the icon.
+ * @param isEnabled Whether it is enabled.
+ */
+ public void paintTriangle(Graphics g, int x, int y, int size, int direction,
+ boolean isEnabled)
+ {
+ Polygon arrow = getArrow(direction, size);
+ arrowIcon arrowI = new arrowIcon(arrow);
+ arrowI.setSize(size);
+
+ Color arrowColor;
+ if (isEnabled())
+ arrowColor = darkShadow;
+ else
+ arrowColor = shadow;
+
+ arrowI.paintIconImpl(g, x, y, arrowColor);
+ }
+
+ /**
+ * This is a private helper that creates polygons for a given size
+ * and direction.
+ *
+ * @param direction The direction of the arrow.
+ * @param size The size of the arrow.
+ *
+ * @return A new arrow polygon.
+ */
+ private Polygon getArrow(int direction, int size)
+ {
+ Polygon arrow;
+ double dsize = (double) size;
+
+ int two = (int) (dsize * 2 / 10);
+ int three = (int) (dsize * 3 / 10);
+ int five = (int) (dsize * 5 / 10);
+ int seven = (int) (dsize * 7 / 10);
+ int eight = (int) (dsize * 8 / 10);
+ switch (direction)
+ {
+ case NORTH:
+ arrow = new Polygon(new int[] { two, five, eight },
+ new int[] { seven, three, seven }, 3);
+ break;
+ case SOUTH:
+ arrow = new Polygon(new int[] { two, five, eight },
+ new int[] { three, seven, three }, 3);
+ break;
+ case EAST:
+ case RIGHT:
+ arrow = new Polygon(new int[] { three, seven, three },
+ new int[] { two, five, eight }, 3);
+ break;
+ case WEST:
+ case LEFT:
+ arrow = new Polygon(new int[] { seven, three, seven },
+ new int[] { two, five, eight }, 3);
+ break;
+ default:
+ throw new IllegalArgumentException("Invalid direction given.");
+ }
+ return arrow;
+ }
+}