caps.java

java2d的源码分析

/*
 * @(#)Caps.java	1.15 99/04/23
 *
 * Copyright (c) 1998, 1999 by Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
 * modify and redistribute this software in source and binary code form,
 * provided that i) this copyright notice and license appear on all copies of
 * the software; and ii) Licensee does not utilize the software in a manner
 * which is disparaging to Sun.
 * 
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
 * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
 * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
 * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
 * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
 * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 * 
 * This software is not designed or intended for use in on-line control of
 * aircraft, air traffic, aircraft navigation or aircraft communications; or in
 * the design, construction, operation or maintenance of any nuclear
 * facility. Licensee represents and warrants that it will not use or
 * redistribute the Software for such purposes.
 */


package demos.Lines;


import java.awt.*;
import java.awt.event.*;
import java.awt.geom.Line2D;
import java.awt.font.TextLayout;
import java.awt.font.FontRenderContext;
import DemoSurface;
import DemoPanel;


/**
 * Shows the three different styles of stroke ending.
 */
public class Caps extends DemoSurface {

    private static int cap[] = { BasicStroke.CAP_BUTT,
        BasicStroke.CAP_ROUND, BasicStroke.CAP_SQUARE };
    private static String desc[] = { "Butt Cap", "Round Cap", "Square Cap" };


    public Caps() {
        setBackground(Color.white);
    }


    public void drawDemo(int w, int h, Graphics2D g2) {

        FontRenderContext frc = g2.getFontRenderContext();
        Font font = g2.getFont();

        g2.setColor(Color.black);
        for (int i=0; i < 3; i++) {
            g2.setStroke(new BasicStroke(15, cap[i], BasicStroke.JOIN_MITER));
            g2.draw(new Line2D.Float(w/4,(i+1)*h/4,w-w/4,(i+1)*h/4));
            TextLayout tl = new TextLayout(desc[i], font, frc);
            tl.draw(g2,(float)(w/2-tl.getBounds().getWidth()/2),(i+1)*h/4-10);
        }
    }


    public static void main(String s[]) {
        Frame f = new Frame("Java2D Demo - Caps");
        f.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {System.exit(0);}
        });
        f.add("Center", new DemoPanel(new Caps()));
        f.pack();
        f.setSize(new Dimension(400,300));
        f.show();
    }

}