Mouse Listener Problem...
Hey all... I'm having probelms with mouse listeners.
I have a JPanel (mainJPanel) that has a gridlayout (2, 2). To this I have added a mouse listener that gets the position of the mouse in this panel. To mainJPanel, I'm adding four JPanels (subPanels, were i is 0 - 3). Now I wanted to add mouse listeners to the four sub-panels so I can get which sub-panel the mouse is over. But when ever I add the mouse listeners to the sub-panels the mouse listener for the mainJPanel stops working. Can anybody tell me what I'm doing wrong and how I can resolve this problem.
Thanx in advance...
[606 byte] By [
G-Rehukua] at [2007-10-1 22:10:59]
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MouseTargets extends JPanel
{
JLabel label;
public MouseTargets()
{
setLayout(new GridLayout(2,0));
for(int j = 0; j < 4; j++)
{
JPanel panel = new JPanel();
panel.setBorder(BorderFactory.createEtchedBorder());
add(panel);
}
addMouseMotionListener(new PanelListener());
}
private class PanelListener extends MouseMotionAdapter
{
JComponent lastEntered;
public PanelListener()
{
// initialize lastEntered to parent component
lastEntered = MouseTargets.this;
}
public void mouseMoved(MouseEvent e)
{
JPanel parent = (JPanel)e.getSource();
Point p = e.getPoint();
JComponent target = (JComponent)getContainingPanel(p, parent);
if(lastEntered != target)
{
target.setBorder(BorderFactory.createLineBorder(Color.red));
lastEntered.setBorder(BorderFactory.createEtchedBorder());
lastEntered = target;
}
label.setText("x = " + p.x + " y = " + p.y);
}
private Component getContainingPanel(Point p, Component parent)
{
Component[] c = getComponents();
for(int j = 0; j < c.length; j++)
{
Rectangle r = c[j].getBounds();
if(r.contains(p))
return c[j];
}
// if no child components contain the point
// return the parent container
return parent;
}
}
private JLabel getLabel()
{
label = new JLabel();
label.setHorizontalAlignment(JLabel.CENTER);
Dimension d = label.getPreferredSize();
d.height = 35;
label.setPreferredSize(d);
return label;
}
public static void main(String[] args)
{
MouseTargets test = new MouseTargets();
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(test);
f.getContentPane().add(test.getLabel(), "South");
f.setSize(400,400);
f.setLocation(200,200);
f.setVisible(true);
}
}
