/* * @(#)ArcTest.java	1.4 97/02/05 * * Copyright (c) 1997 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. */import java.awt.*;import java.awt.event.*;import java.applet.*;/** * An interactive test of the Graphics.drawArc and Graphics.fillArc * routines. Can be run either as a standalone application by * typing "java ArcTest" or as an applet in the AppletViewer. */public class ArcTest extends Applet {    ArcControls controls;   // The controls for marking and filling arcs    ArcCanvas canvas;       // The drawing area to display arcs    public void init() {	setLayout(new BorderLayout());	canvas = new ArcCanvas();	add("Center", canvas);	add("South", controls = new ArcControls(canvas));    }    public void destroy() {        remove(controls);        remove(canvas);    }    public void start() {	controls.setEnabled(true);    }    public void stop() {	controls.setEnabled(false);    }      public void processEvent(AWTEvent e) {        if (e.getID() == Event.WINDOW_DESTROY) {            System.exit(0);        }    }    public static void main(String args[]) {	Frame f = new Frame("ArcTest");	ArcTest	arcTest = new ArcTest();	arcTest.init();	arcTest.start();	f.add("Center", arcTest);	f.setSize(300, 300);	f.show();    }    public String getAppletInfo() {        return "An interactive test of the Graphics.drawArc and \nGraphics.fillArc routines. Can be run \neither as a standalone application by typing 'java ArcTest' \nor as an applet in the AppletViewer.";    }}class ArcCanvas extends Canvas {    int		startAngle = 0;    int		endAngle = 45;    boolean	filled = false;    Font	font;    public void paint(Graphics g) {	Rectangle r = getBounds();	int hlines = r.height / 10;	int vlines = r.width / 10;	g.setColor(Color.pink);	for (int i = 1; i <= hlines; i++) {	    g.drawLine(0, i * 10, r.width, i * 10);	}	for (int i = 1; i <= vlines; i++) {	    g.drawLine(i * 10, 0, i * 10, r.height);	}	g.setColor(Color.red);	if (filled) {	    g.fillArc(0, 0, r.width - 1, r.height - 1, startAngle, endAngle);	} else {	    g.drawArc(0, 0, r.width - 1, r.height - 1, startAngle, endAngle);	}	g.setColor(Color.black);	g.setFont(font);	g.drawLine(0, r.height / 2, r.width, r.height / 2);	g.drawLine(r.width / 2, 0, r.width / 2, r.height);	g.drawLine(0, 0, r.width, r.height);	g.drawLine(r.width, 0, 0, r.height);	int sx = 10;	int sy = r.height - 28;	g.drawString("S = " + startAngle, sx, sy); 	g.drawString("E = " + endAngle, sx, sy + 14);     }    public void redraw(boolean filled, int start, int end) {	this.filled = filled;	this.startAngle = start;	this.endAngle = end;	repaint();    }}class ArcControls extends Panel                  implements ActionListener {    TextField s;    TextField e;    ArcCanvas canvas;    public ArcControls(ArcCanvas canvas) {	Button b = null;	this.canvas = canvas;	add(s = new TextField("0", 4));	add(e = new TextField("45", 4));	b = new Button("Fill");	b.addActionListener(this);	add(b);	b = new Button("Draw");	b.addActionListener(this);	add(b);    }    public void actionPerformed(ActionEvent ev) {	String label = ev.getActionCommand();	canvas.redraw(label.equals("Fill"),	              Integer.parseInt(s.getText().trim()),	              Integer.parseInt(e.getText().trim()));    }}