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updating variable on ouseMoved

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Join Date: Mar 2008

Posts: 76

Reputation: Lensva has a little shameless behaviour in the past

Solved Threads: 3

Lensva

Offline

Junior Poster in Training

updating variable on ouseMoved

Jun 5th, 2009

Class A has a MouseMotionListener which updates cursorLocation every time its called;
Class B extends A. the idea is to make B's lastSelected update once cursorLocation is updated and println the new coords. i thought paintComponent could be used for that but im sure theres something obvious im missing:

 Help with Code Tags 
 java Syntax (Toggle Plain Text) 
import java.awt.*;
import java.awt.event.*;
 
import javax.swing.*;
 
class A extends JPanel{
	Point cursorLocation;
 
	A() {
		setPreferredSize(new Dimension(200,200));
		addMouseMotionListener(new MouseMotionHandler());
	}
 
	private class MouseMotionHandler extends MouseMotionAdapter {
 
		public void mouseMoved(MouseEvent e) { cursorLocation = new Point(e.getX(), e.getY());}
 
	}
}
import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

class A extends JPanel{
	Point cursorLocation;

	A() {
		setPreferredSize(new Dimension(200,200));
		addMouseMotionListener(new MouseMotionHandler());
	}
	
	private class MouseMotionHandler extends MouseMotionAdapter {
		
		public void mouseMoved(MouseEvent e) { cursorLocation = new Point(e.getX(), e.getY());}

	}
}

 Help with Code Tags 
 java Syntax (Toggle Plain Text) 
import java.awt.*;
import javax.swing.*;
 
public class B extends A{
	Point lastSelected;
 
	static public void main(String[] args) {
		JFrame frame = new JFrame();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setSize(600,400);
 
 
		B b = new B();
		frame.getContentPane().add(BorderLayout.CENTER,b);
		frame.setVisible(true);
	}
 
	B() {
		super();
	}
/*
	public void paintComponent(Graphics g) {		
		if (lastSelected != cursorLocation) { lastSelected = new Point(cursorLocation); repaint(); }
		System.out.println(lastSelected);
*/
 
 
	}
}
import java.awt.*;
import javax.swing.*;

public class B extends A{
	Point lastSelected;
	
	static public void main(String[] args) {
		JFrame frame = new JFrame();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setSize(600,400);
		
		
		B b = new B();
		frame.getContentPane().add(BorderLayout.CENTER,b);
		frame.setVisible(true);
	}
	
	B() {
		super();
	}
/*
	public void paintComponent(Graphics g) {		
		if (lastSelected != cursorLocation) { lastSelected = new Point(cursorLocation); repaint(); }
		System.out.println(lastSelected);
*/


	}
}