import java.awt.Canvas;
import java.awt.Color;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.QuadCurve2D;
import java.awt.geom.Rectangle2D;
import java.util.Vector;
import javax.swing.JApplet;
import javax.swing.JFrame;
public class QuadCurve extends JApplet {
DrawingCanvas canvas;
public static void main(String[] a){
JFrame f = new JFrame();
QuadCurve curve = new QuadCurve();
curve.init();
f.getContentPane().add(curve);
f.setDefaultCloseOperation(1);
f.setSize(650,250);
f.setVisible(true);
}
public void init() {
Container container = getContentPane();
canvas = new DrawingCanvas();
container.add(canvas);
}
class DrawingCanvas extends Canvas {
Vector quadCurves;
QuadCurve2D selectedCurve = null;
Rectangle2D boundingRec = null;
public DrawingCanvas() {
setBackground(Color.white);
setSize(400, 200); // width and height of canvas
quadCurves = new Vector();
quadCurves.addElement(new QuadCurve2D.Float(20, 20, 80, 160, 120,
20));
quadCurves.addElement(new QuadCurve2D.Float(120, 100, 160, 40, 200,
180));
quadCurves.addElement(new QuadCurve2D.Float(240, 20, 220, 60, 260,
120));
quadCurves.addElement(new QuadCurve2D.Float(250, 160, 260, 140,
280, 180));
quadCurves.addElement(new QuadCurve2D.Float(300, 180, 340, 40, 380,
120));
quadCurves.addElement(new QuadCurve2D.Float(20, 180, 80, 170, 120,
190));
}
public void paint(Graphics g) {
Graphics2D g2D = (Graphics2D) g;
for (int i = 0; i < quadCurves.size(); i++) {
g2D.draw((QuadCurve2D) quadCurves.elementAt(i));
}
}
}
}