package elte.java2_utikalauz5.java2d;

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

/**
peldaprogram az affin trafok hasznalatara.

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

	AffineTransform	trafo = new AffineTransform ();
	Button gomb1 = new Button ("Eltolas");
	Button gomb2 = new Button ("Forgatas");
	Button gomb3 = new Button ("Leptekezes");
	Button gomb4 = new Button ("Nyiras");

	public void initScreen () {
		Frame f = new Frame ();
		Panel p = new Panel ();

		p.setLayout (new FlowLayout ());
		p.add (gomb1);
		p.add (gomb2);
		p.add (gomb3);
		p.add (gomb4);

		f.add (this);
		f.add ("South", p);

		gomb1.addActionListener (this);
		gomb2.addActionListener (this);
		gomb3.addActionListener (this);
		gomb4.addActionListener (this);

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

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

	public void paint (Graphics g) {
		Graphics2D g2 = (Graphics2D) g;
		Rectangle2D teglalap = new Rectangle2D.Float (100.0f, 100.0f, 50.0f, 100.0f);
		g2.setTransform (trafo);
		g2.setColor (Color.blue);
		g2.draw (teglalap);
	}

	public static void main (String[] args) {
		Transzformacio t = new Transzformacio ();
		t.initScreen ();
	}

	public void actionPerformed (ActionEvent e) {
		if (e.getActionCommand ().compareTo ("Eltolas") == 0)
			trafo.translate (10.0, 10.0);
		else
		if (e.getActionCommand ().compareTo ("Forgatas") == 0)
			trafo.rotate (Math.PI / 4.0, 125.0, 150.0);
		else
		if (e.getActionCommand ().compareTo ("Leptekezes") == 0)
			trafo.scale (2.0, 1.0);
		else
			trafo.shear (-0.5, 0.0);

		repaint ();
	}

}