How to get location of a mouse click relative to a swing window

Question

Say I'm in a Java Swing JFrame. I click my mouse. I want to get the location of the mouse click within the GUI. In java, the line

int mouseX = MouseInfo.getPointerInfo().getLocation.x;

Seems to give the location of the mouse on the entire screen. How would I get it's location relative to the GUI?

Answer 1

From MouseListener methods you can do:

@Override
public void mouseClicked(MouseEvent e) {
    int x=e.getX();
    int y=e.getY();
    System.out.println(x+","+y);//these co-ords are relative to the component
}

Simply add this to your Component by:

component.addMouseListener(new MouseListener() {
    @Override
    public void mouseClicked(MouseEvent e) {
    }
});

Reference:

• How to Write a Mouse Listener

Answer 2

You can add MouseListener to GUI component whose top left pixel should be threated as [0,0] point, and get x and y from MouseEvent

JFrame frame = new JFrame();
JPanel panel = new JPanel();
frame.add(panel);
panel.addMouseListener(new MouseAdapter() {// provides empty implementation of all
                                           // MouseListener`s methods, allowing us to
                                           // override only those which interests us
    @Override //I override only one method for presentation
    public void mousePressed(MouseEvent e) {
        System.out.println(e.getX() + "," + e.getY());
    }
});
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(200, 200);
frame.setVisible(true);