package elte.java2_utikalauz5.java2d;

import java.awt.*;
import java.awt.geom.*;
import java.awt.event.*;

/**
peldaprogram az iteratorok hasznalatara.

@link.forrásfájl {@docRoot}/../data/java2d/src Iterator.java
@link.letöltés {@docRoot}/../data/java2d Iterator.jar
@since Java 2 Útikalauz programozóknak
*/
class Iterator extends Canvas {
    /** Verziószám */
    private final static long serialVersionUID = 15L;

	public void paint (Graphics g) {
		Graphics2D g2 = (Graphics2D) g;

		QuadCurve2D gorbe = new QuadCurve2D.Float (10.0f, 200.0f, 100.0f, 0.0f, 190.0f, 200.0f);
		PathIterator korvonal = gorbe.getPathIterator (null);
		FlatteningPathIterator laposKorvonal = new FlatteningPathIterator (korvonal, 0.1);
		Point2D pontok[] = new Point2D [200];
		int i = 0;

		while (!laposKorvonal.isDone ()) {
			float[] koordinatak = new float [6];

			switch (laposKorvonal.currentSegment (koordinatak)) {
				case FlatteningPathIterator.SEG_MOVETO:
				case FlatteningPathIterator.SEG_LINETO:
					pontok[i] = new Point2D.Float (koordinatak[0], koordinatak[1]);
			}
			i++;
			laposKorvonal.next();
		}

		for (int j = 0; j < i - 1; j++) {
			Line2D vonal = new Line2D.Double (pontok[j], pontok[j+1]);
			g2.draw (vonal);
		}
	}

	public static void main (String[] args) {
		Frame f = new Frame ();
		f.add (new Iterator ());

		f.addWindowListener (
			new WindowAdapter () {
				public void windowClosing (WindowEvent e) {
					System.exit (0);
				}
			}
		);

		f.setSize (300, 300);
		f.setVisible (true);
	}
}