X & Y of the following event "Mouse clicked"

[jack DANIEL's]

Hello everybody,

the program I have to write should be able to create a rectangle in a JScrollPane.
My goal would be to create a JMenuBar with a JMenuItem called "New rectangle" which, if pressed, will create the rectangle in the next point of the JScrollPane clicked by the mouse. So far I just succeed into having the rectangle created in a particular point by manually inserting the X and Y in the code, but I would like to create it in the getX () and getY () of the following point in which the user press the mouse.

Is it possible to do such a thing?

Thanks in advance.

[eRaaaa]

Is it possible to do such a thing?

Yes, add a MouseListener to your Panel. In the mousePressed method you save the x and y coordinates and call repaint on your Panel. In your paintComponent method of your JPanel you draw the rectangle with the stored coordinates...
example:

import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;

public class Snippet {
	private int x = -1, y = -1;
	private boolean isDrawing=true;

	public Snippet() {
		JFrame frame = new JFrame();
		final JPanel panel = new JPanel() {
			{
				setSize(500,500);
				setPreferredSize(getSize());
			}
			@Override
			protected void paintComponent(Graphics g) {
				super.paintComponent(g);
				if(x>=0 && y>=0){
					g.fillRect(x, y, 100, 100);
				}
			}
		};
		panel.addMouseListener(new MouseAdapter() {
			@Override
			public void mousePressed(MouseEvent e) {
				if(isDrawing){ //jmenuitem has to set it
					x = e.getX();
					y = e.getY();
					panel.repaint();					
				}
			}
		});
		JScrollPane scroll = new JScrollPane(panel);
		frame.add(scroll);
		frame.setSize(500, 500);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setLocationRelativeTo(null);
		frame.setVisible(true);
	}

	public static void main(String[] args) throws Exception {
		SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				new Snippet();
			}
		});
	}
}

[jack DANIEL's]

Thank you for the sample code, it helped me very much ;)