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Java Source | 1996-11-11 | 4.2 KB | 151 lines |
- /*
- * @(#)ArcTest.java 1.9 95/09/01 Sami Shaio
- *
- * Copyright (c) 1994-1995 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Permission to use, copy, modify, and distribute this software
- * and its documentation for NON-COMMERCIAL or COMMERCIAL purposes and
- * without fee is hereby granted.
- * Please refer to the file http://java.sun.com/copy_trademarks.html
- * for further important copyright and trademark information and to
- * http://java.sun.com/licensing.html for further important licensing
- * information for the Java (tm) Technology.
- *
- * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
- * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
- * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
- *
- * THIS SOFTWARE IS NOT DESIGNED OR INTENDED FOR USE OR RESALE AS ON-LINE
- * CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING FAIL-SAFE
- * PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, AIRCRAFT
- * NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT LIFE
- * SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE
- * SOFTWARE COULD LEAD DIRECTLY TO DEATH, PERSONAL INJURY, OR SEVERE
- * PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH RISK ACTIVITIES"). SUN
- * SPECIFICALLY DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR
- * HIGH RISK ACTIVITIES.
- */
- import java.awt.*;
- 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;
- public void init() {
- setLayout(new BorderLayout());
- ArcCanvas c = new ArcCanvas();
- add("Center", c);
- add("South", controls = new ArcControls(c));
- }
-
- public void start() {
- controls.enable();
- }
-
- public void stop() {
- controls.disable();
- }
-
- public boolean handleEvent(Event e) {
- if (e.id == Event.WINDOW_DESTROY) {
- System.exit(0);
- }
- return false;
- }
-
- public static void main(String args[]) {
- Frame f = new Frame("ArcTest");
- arctest arcTest = new arctest();
-
- arcTest.init();
- arcTest.start();
-
- f.add("Center", arcTest);
- f.resize(300, 300);
- f.show();
- }
- }
-
-
- class ArcCanvas extends Canvas {
- int startAngle = 0;
- int endAngle = 45;
- boolean filled = false;
- Font font;
-
- public void paint(Graphics g) {
- Rectangle r = bounds();
- 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 {
- TextField s;
- TextField e;
- ArcCanvas canvas;
-
- public ArcControls(ArcCanvas canvas) {
- this.canvas = canvas;
- add(s = new TextField("0", 4));
- add(e = new TextField("45", 4));
- add(new Button("Fill"));
- add(new Button("Draw"));
- }
-
- public boolean action(Event ev, Object arg) {
- if (ev.target instanceof Button) {
- String label = (String)arg;
-
- canvas.redraw(label.equals("Fill"),
- Integer.parseInt(s.getText().trim()),
- Integer.parseInt(e.getText().trim()));
-
- return true;
- }
-
- return false;
- }
- }
-
-