Mega Code Archive
Arrow Icon
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/*
* Copyright 2008 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Sun Microsystems nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsEnvironment;
import java.awt.Image;
import java.awt.Transparency;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import javax.swing.Icon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
/**
*
* @author Administrator
*/
public class ArrowIcon implements Icon, SwingConstants {
private static final float DB = -.06f;
private int direction;
private int size;
private Color color;
private BufferedImage arrowImage;
public ArrowIcon(int direction) {
this(direction, 10, null);
}
public ArrowIcon(int direction, Color color) {
this(direction, 10, color);
}
public ArrowIcon(int direction, int size, Color color) {
this.size = size;
this.direction = direction;
this.color = color;
}
public int getIconHeight() {
return size;
}
public int getIconWidth() {
return size;
}
public void paintIcon(Component c, Graphics g, int x, int y) {
g.drawImage(getArrowImage(), x, y, c);
}
public static BufferedImage createTranslucentImage(int width, int height) {
return GraphicsEnvironment.getLocalGraphicsEnvironment().
getDefaultScreenDevice().getDefaultConfiguration().createCompatibleImage(width, height, Transparency.TRANSLUCENT);
}
protected Image getArrowImage() {
if (arrowImage == null) {
arrowImage = createTranslucentImage(size, size);
AffineTransform atx = direction != SOUTH? new AffineTransform() : null;
switch(direction ) {
case NORTH:
atx.setToRotation(Math.PI, size/2, size/2);
break;
case EAST:
atx.setToRotation(-(Math.PI/2), size/2, size/2);
break;
case WEST:
atx.setToRotation(Math.PI/2, size/2, size/2);
case SOUTH:
default:{ /* no xform*/ }
}
Graphics2D ig = (Graphics2D)arrowImage.getGraphics();
if (atx != null) {
ig.setTransform(atx);
}
int width = size;
int height = size/2 + 1;
int xx = (size - width)/2;
int yy = (size - height + 1)/2;
Color base = color != null? color : UIManager.getColor("controlDkShadow").darker();
paintArrow(ig, base, xx, yy);
paintArrowBevel(ig, base, xx, yy);
paintArrowBevel(ig, deriveColorHSB(base, 0f, 0f, .20f), xx, yy + 1);
}
return arrowImage;
}
protected void paintArrow(Graphics2D g, Color base, int x, int y) {
g.setColor(base);
/*
Path2D.Float arrowShape = new Path2D.Float();
arrowShape.moveTo(x, y-1);
System.out.println("moveTo "+(x)+","+(y-1));
arrowShape.lineTo(size-1, y-1);
System.out.println("lineTo "+(size-1)+","+(y-1));
arrowShape.lineTo(size/2, y+(size/2));
System.out.println("lineTo "+(size/2)+","+(y+(size/2)));
arrowShape.lineTo(size/2 - 1, y+(size/2));
System.out.println("lineTo "+ (size/2 - 1)+","+(y+(size/2)));
arrowShape.lineTo(x, y-1);
System.out.println("lineTo "+(x)+","+(y-1));
g.fill(arrowShape);
*/
int len = size - 2;
int xx = x;
int yy = y-1;
while (len >= 2) {
xx++;
yy++;
g.fillRect(xx, yy, len, 1);
len -= 2;
}
}
protected void paintArrowBevel(Graphics g, Color base, int x, int y) {
int len = size;
int xx = x;
int yy = y;
Color c2 = deriveColorHSB(base, 0f, 0f, (-DB)*(size/2));
while (len >= 2) {
c2 = deriveColorHSB(c2, 0f, 0f, DB);
g.setColor(c2);
g.fillRect(xx, yy, 1, 1);
g.fillRect(xx + len - 1, yy, 1, 1);
len -= 2;
xx++;
yy++;
}
}
/**
* Derives a color by adding the specified offsets to the base color's
* hue, saturation, and brightness values. The resulting hue, saturation,
* and brightness values will be contrained to be between 0 and 1.
* @param base the color to which the HSV offsets will be added
* @param dH the offset for hue
* @param dS the offset for saturation
* @param dB the offset for brightness
* @return Color with modified HSV values
*/
public static Color deriveColorHSB(Color base, float dH, float dS, float dB) {
float hsb[] = Color.RGBtoHSB(
base.getRed(), base.getGreen(), base.getBlue(), null);
hsb[0] += dH;
hsb[1] += dS;
hsb[2] += dB;
return Color.getHSBColor(
hsb[0] < 0? 0 : (hsb[0] > 1? 1 : hsb[0]),
hsb[1] < 0? 0 : (hsb[1] > 1? 1 : hsb[1]),
hsb[2] < 0? 0 : (hsb[2] > 1? 1 : hsb[2]));
}
public static void main(String args[]) {
JFrame frame = new JFrame();
JPanel panel = new JPanel();
frame.add(panel);
panel.add(new JLabel("north", new ArrowIcon(ArrowIcon.NORTH), JLabel.CENTER));
panel.add(new JLabel("west", new ArrowIcon(ArrowIcon.WEST), JLabel.CENTER));
panel.add(new JLabel("south", new ArrowIcon(ArrowIcon.SOUTH), JLabel.CENTER));
panel.add(new JLabel("east", new ArrowIcon(ArrowIcon.EAST), JLabel.CENTER));
panel.add(new JLabel("east-20", new ArrowIcon(ArrowIcon.EAST, 20, Color.blue), JLabel.CENTER));
frame.pack();
frame.setVisible(true);
}
}
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