package untitled4;

import java.awt.Graphics;
import javax.swing.*;
import java.awt.Graphics2D;
import java.awt.geom.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

/**
	RotatableJComponent can be rotated 90, 180 or 270 degrees.

  The main() test driver allows the user to enter 0, 90, 180 or 270 in
  the textField to see the results.
*/
public class RotatableJComponent extends JTextField {
	private int rotation;
	private int normalX, normalY, normalWidth, normalHeight;

	public RotatableJComponent() {
		super();

		setBorder(null);
	}

	/**
		Capture the normal bounds and retain.
	*/
	public void setBounds(int x, int y, int width, int height){
		normalX = x;
		normalY = y;
		normalWidth = width;
		normalHeight = height;

		super.setBounds(x, y, width, height);

		setToolTipText("x=" + getX() + " y=" + getY() + " width=" + getWidth() + " height=" + getHeight() + " rotation=" + rotation);
	}

	public void setRotation(int degrees){
		this.rotation = degrees;

		switch(rotation){
			case 0:
				super.setBounds(normalX, normalY, normalWidth, normalHeight);
				break;
			case 90:
				// Reverse width and height.
				super.setBounds(normalX, normalY, normalHeight, normalWidth);
				break;
			case 180:
				super.setBounds(normalX, normalY, normalWidth, normalHeight);
				break;
			case 270:
				// Reverse width and height.
				super.setBounds(normalX, normalY, normalHeight, normalWidth);
				break;
		}

		revalidate();

		setToolTipText("x=" + getX() + " y=" + getY() + " width=" + getWidth() + " height=" + getHeight() + " rotation=" + rotation);
	}

	public void paint(Graphics g) {
		Graphics2D g2d = (Graphics2D)g;

		if(rotation != 0){
			Rectangle rectangle = g2d.getClipBounds();
			System.out.println("clipBounds=" + rectangle + " getX()=" + getX() + " getY()=" + getY() + " getWidth()=" + getWidth() + " getHeight()=" + getHeight());

			AffineTransform at = AffineTransform.getRotateInstance((this.rotation * java.lang.Math.PI) / 180,
                     			rectangle.getCenterX(), rectangle.getCenterY());

			g2d.transform (at);
		}

		super.paint(g);
	}

	public static void main(String[] args) {
		JFrame frame = new JFrame();

		frame.getContentPane().setLayout(null);
		frame.setSize(new Dimension(400, 300));

		RotatableJComponent rjc = new RotatableJComponent();
		rjc.setBackground(Color.yellow);
		rjc.setText("0");
		rjc.setBounds(10, 20, 100, 10);
		rjc.addActionListener(new ActionListener(){
                      			public void actionPerformed(ActionEvent e){
                      				RotatableJComponent rjc = (RotatableJComponent)e.getSource();
                      				int i = Integer.parseInt(rjc.getText());
                      				rjc.setRotation(i);
                      			}
                      		});

		frame.getContentPane().add(rjc);

		frame.validate();

		frame.setVisible(true);
	}
}