Static methods for some common painting functions : Paint « 2D Graphics GUI « Java
Static methods for some common painting functions
/*
* @(#)PaintUtils.java 1.0 2008-03-01
*
* Copyright (c) 2008 Jeremy Wood
* E-mail: mickleness@gmail.com
* All rights reserved.
*
* The copyright of this software is owned by Jeremy Wood.
* You may not use, copy or modify this software, except in
* accordance with the license agreement you entered into with
* Jeremy Wood. For details see accompanying license terms.
*/
import java.awt.*;
import javax.swing.*;
/** Some static methods for some common painting functions.
*
* @version 1.0
* @author Jeremy Wood
**/
public class PaintUtils {
/** Four shades of white, each with increasing opacity. */
public final static Color[] whites = new Color[] {
new Color(255,255,255,50),
new Color(255,255,255,100),
new Color(255,255,255,150)
};
/** Four shades of black, each with increasing opacity. */
public final static Color[] blacks = new Color[] {
new Color(0,0,0,50),
new Color(0,0,0,100),
new Color(0,0,0,150)
};
/** @return the color used to indicate when a component has
* focus. By default this uses the color (64,113,167), but you can
* override this by calling:
* <BR><code>UIManager.put("focusRing",customColor);</code>
*/
public static Color getFocusRingColor() {
Object obj = UIManager.getColor("focusRing");
if(obj instanceof Color)
return (Color)obj;
return new Color(64,113,167);
}
/** Paints 3 different strokes around a shape to indicate focus.
* The widest stroke is the most transparent, so this achieves a nice
* "glow" effect.
* <P>The catch is that you have to render this underneath the shape,
* and the shape should be filled completely.
*
* @param g the graphics to paint to
* @param shape the shape to outline
* @param biggestStroke the widest stroke to use.
*/
public static void paintFocus(Graphics2D g,Shape shape,int biggestStroke) {
Color focusColor = getFocusRingColor();
Color[] focusArray = new Color[] {
new Color(focusColor.getRed(), focusColor.getGreen(), focusColor.getBlue(),255),
new Color(focusColor.getRed(), focusColor.getGreen(), focusColor.getBlue(),170),
new Color(focusColor.getRed(), focusColor.getGreen(), focusColor.getBlue(),110)
};
g.setStroke(new BasicStroke(biggestStroke));
g.setColor(focusArray[2]);
g.draw(shape);
g.setStroke(new BasicStroke(biggestStroke-1));
g.setColor(focusArray[1]);
g.draw(shape);
g.setStroke(new BasicStroke(biggestStroke-2));
g.setColor(focusArray[0]);
g.draw(shape);
g.setStroke(new BasicStroke(1));
}
/** Uses translucent shades of white and black to draw highlights
* and shadows around a rectangle, and then frames the rectangle
* with a shade of gray (120).
* <P>This should be called to add a finishing touch on top of
* existing graphics.
* @param g the graphics to paint to.
* @param r the rectangle to paint.
*/
public static void drawBevel(Graphics g,Rectangle r) {
drawColors(blacks,g, r.x, r.y+r.height, r.x+r.width, r.y+r.height, SwingConstants.SOUTH);
drawColors(blacks,g, r.x+r.width, r.y, r.x+r.width, r.y+r.height, SwingConstants.EAST);
drawColors(whites,g, r.x, r.y, r.x+r.width, r.y, SwingConstants.NORTH);
drawColors(whites,g, r.x, r.y, r.x, r.y+r.height, SwingConstants.WEST);
g.setColor(new Color(120, 120, 120));
g.drawRect(r.x, r.y, r.width, r.height);
}
private static void drawColors(Color[] colors,Graphics g,int x1,int y1,int x2,int y2,int direction) {
for(int a = 0; a<colors.length; a++) {
g.setColor(colors[colors.length-a-1]);
if(direction==SwingConstants.SOUTH) {
g.drawLine(x1, y1-a, x2, y2-a);
} else if(direction==SwingConstants.NORTH) {
g.drawLine(x1, y1+a, x2, y2+a);
} else if(direction==SwingConstants.EAST) {
g.drawLine(x1-a, y1, x2-a, y2);
} else if(direction==SwingConstants.WEST) {
g.drawLine(x1+a, y1, x2+a, y2);
}
}
}
}
