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* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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
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* BE LIABLE FOR ANY DAMAGES OR LIABILITIES SUFFERED BY LICENSEE AS A RESULT
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*//*
* @(#)ArcTest.java 1.10 03/01/23
*/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 ing 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 = new java.awt.Font("Courier", Font.BOLD, 12); 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()));
}
}