// file Select.java 
// Demo of Selection applied to four imported images
// Harriet Fell
// February 5, 2002
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import javax.swing.*;
import java.awt.image.*;
import java.util.Random;

public class ImageSelect extends JComponent 
	implements MouseListener, MouseMotionListener {
	
	private MyImage myImages [] = new MyImage[4];
	
	public ImageSelect(int windowWidth) {
		// Listen for mouse movements and clicks
		addMouseMotionListener(this);
		addMouseListener(this);
		
		// Allocate array for four images
		
		// Initialize images
		for (int im = 0; im < 4; im++)
			myImages[im] = new MyImage();
		// Load images
		myImages[0].image = Toolkit.getDefaultToolkit().getImage("Tradscantia3b.JPG");
		myImages[1].image = Toolkit.getDefaultToolkit().getImage("Margaritte1b.JPG");
		myImages[2].image = Toolkit.getDefaultToolkit().getImage("GiantHosta1b.JPG");
		myImages[3].image = Toolkit.getDefaultToolkit().getImage("RedTulip5b.jpg");
		
		// Initialize transforms
		for (int im = 0; im < 4; im++) {
			myImages[im].transform = new AffineTransform();  //set to Identity
			myImages[im].x0 = im*windowWidth/4;
			myImages[im].y0 = 0;
			myImages[im].numRotations = 0;
			myImages[im].transform.translate(myImages[im].x0, myImages[im].y0);			
			myImages[im].selected = false;
			myImages[im].bounds = new Rectangle2D.Double();
			myImages[im].bounds.setRect(0, 0, windowWidth/4, windowWidth/4);
		}
	}

	public void paint(Graphics g) {
		Graphics2D g2 = (Graphics2D)g;
		int wd = getSize().width;
		int ht = getSize().height;
		AffineTransform id = new AffineTransform(); //Identity transform
		for (int im = 0; im < 4; im++) {
			myImages[im].bounds.setRect(0, 0, wd/4, ht/4); // for resizing	
						
			myImages[im].transform.setToTranslation(myImages[im].x0, myImages[im].y0);
			myImages[im].transform.rotate(myImages[im].numRotations*Math.PI/6);	
			g2.setTransform(id);
			g2.translate(0, 22);	
			g2.transform(myImages[im].transform);
			//g2.translate(myImages[im].x0, myImages[im].y0);
			g2.drawImage(myImages[im].image, 0, 0, wd/4, ht/4, this);
			
			//highlight selected image
			if (myImages[im].selected) {
				g2.setPaint(Color.yellow);
				g2.setStroke(new BasicStroke(3));
				g2.draw(myImages[im].bounds);
				//System.out.print(im + "selected");
				g2.setPaint(Color.black);
				g2.setStroke(new BasicStroke(1));
			}
		}			
		g2.setTransform(id);
		g2.translate(0, 22);
	}

	public void mouseDragged(MouseEvent e) {
	/*
		int mods = e.getModifiers();
	// mouse dragged for image A
		if ((mods & InputEvent.SHIFT_MASK) != 0) 	
		// rotate counter-clockwise if shift only  is down
			numRotationsA--;
		else if ((mods & InputEvent.CTRL_MASK) != 0) 
		// rotate clockwise
			numRotationsA++;	
		else {				
			x0A = e.getX();
			y0A = e.getY(); 
			translateA.setToTranslation(x0A, y0A);
		}
		rotateA.setToRotation(numRotationsA*Math.PI/6);
		repaint();
	*/	
		for (int im = 0; im < 4; im++) {
			if(myImages[im].selected) {
				//myImages[im].transform.translate(e.getX() - myImages[im].x0, e.getY() - myImages[im].y0);
				myImages[im].x0 = e.getX();
				myImages[im].y0 = e.getY(); 
			}
			
		}
		repaint();
	}

	public void mouseMoved(MouseEvent e) {
		int mods = e.getModifiers();
		for (int im = 0; im < 4; im++) {
			if(myImages[im].selected) {
				if ((mods & InputEvent.SHIFT_MASK) != 0) 	
				// rotate counter-clockwise if shift is down
					myImages[im].numRotations++;
				else if ((mods & InputEvent.CTRL_MASK) != 0) 
				// rotate clockwise if Ctrl is down
					myImages[im].numRotations--;				
			}
		}		
		repaint();		
	}

	public void mousePressed(MouseEvent e) {}
	public void mouseReleased(MouseEvent e) {}
	public void mouseExited(MouseEvent e) {}
	public void mouseEntered(MouseEvent e) {}
	public void mouseClicked(MouseEvent e) {
		int x, y;
		x = e.getX();
		y = e.getY();
				
		AffineTransform at = new AffineTransform();	
		boolean selected = false;	
		for (int im = 0; im < 4; im++) {
		try{
			Point2D pt = new Point2D.Double(x, y);
			at = myImages[im].transform.createInverse();
			pt = at.transform(pt, pt);
			//System.out.print(pt.getX() + "   " + pt.getY() + '\n');
			if (myImages[im].bounds.contains(pt)  && !selected) {
				myImages[im].selected = true;
				selected = true;
			}
			else myImages[im].selected = false;
		}
		catch(NoninvertibleTransformException nte) {}
		}
		repaint();
	}
	
	public static void main(String[] args){
		JFrame f = new JFrame("ImageSelect");
		int windowWidth = 600;
		Container c = f.getContentPane();
		c.setLayout(new BorderLayout());
		c.add(new ImageSelect(windowWidth), BorderLayout.CENTER);
		f.setSize(windowWidth, windowWidth + 22);

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

		f.setVisible(true);
	}
}