Re: Passing a mouse event message to the parent window?

Sample compilable code:

I can drag the JLabel, but I can't drag the JButton, even when it is
disabled.

How do I get the mouse events to not be gobbled by the disabled
JButton?
OR How do I get the JButton to pass those mouse events to the parent
container?

import javax.swing.*;
import javax.swing.text.*;
import javax.swing.border.*;
import java.awt.*;
import java.awt.event.*;

public class DragSample extends JPanel
        implements MouseListener, MouseMotionListener {

    private JButton dragButton;
    private JLabel label;
    private JPanel parent;
    private JComponent dragging = null;
    private int mOffsetX, mOffsetY;
    private boolean disabled = false;

    public DragSample() {

        setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
        JToolBar toolBar = buildToolbar();
        add(toolBar);

        parent = new JPanel();
        add(parent);
        parent.setBackground( Color.white);
        parent.setPreferredSize(new Dimension(640, 480));
        parent.addMouseMotionListener(this);
        parent.addMouseListener(this);

        // Create a button.

        dragButton = new JButton("Drag Me");
        parent.add(dragButton);

        // Create JLabel
        Border myBorder = BorderFactory.createLineBorder( Color.red );
        label = new JLabel("Drag me");
        label.setBounds(0, 100, 50, 50);
        label.setBorder(myBorder);
        parent.add(label);

    }
    private JToolBar buildToolbar() {

        JToolBar toolBar = new JToolBar();
        toolBar.setRollover( true );
        toolBar.setFloatable( false );
        JButton disableButton = new JButton("Disable");
        disableButton.setToolTipText( "Disable 'Drag Me' Button" );
        disableButton.addActionListener( new ActionListener() {
            public void actionPerformed( ActionEvent e ) {
                disabled = true;
                dragButton.setEnabled(false);
            }
        });
        toolBar.add( disableButton );
        return toolBar;
    }

    /**
     * Create the GUI and show it. For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
     */
    private static void createAndShowGUI() {
        //Make sure we have nice window decorations.
        JFrame.setDefaultLookAndFeelDecorated(true);

        //Create and set up the window.
        JFrame frame = new JFrame("DragSample");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Create and set up the content pane.
        JComponent newContentPane = new DragSample();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }

    //
============================================================================
    // Mouse and Mouse motion event handlers

    public void mouseDragged(MouseEvent e) {
        if ( dragging!=null ) {

            int newY = e.getY() - mOffsetY;
            int newX = e.getX() - mOffsetX;
            dragging.setLocation(newX, newY);
        }
    }
    public void mouseMoved(MouseEvent e) {} //do nothing
    public void mouseExited(MouseEvent e) {} // do nothing
    public void mouseEntered(MouseEvent e) {} // do nothing
    public void mouseClicked(MouseEvent e) {} // do nothing

    public void mousePressed(MouseEvent e) {
        int cx = e.getX();
        int cy = e.getY();
        System.out.println("MousePressed event");
        // Find which component, if any, the mouse is over
        int lx, ty, rx, by;
        lx = label.getX();
        rx = lx + label.getWidth();
        if ((cx>=lx) && (cx<=rx)) {
            ty = label.getY();
            by = ty + label.getHeight();
            if ((cy>=ty) && (cy<=by)) {
                dragging = label;
            }
        }
        lx = dragButton.getX();
        rx = lx + dragButton.getWidth();
        if ((cx>=lx) && (cx<=rx)) {
            ty = dragButton.getY();
            by = ty + dragButton.getHeight();
            if ((cy>=ty) && (cy<=by)) {
                dragging = dragButton;
            }
        }

        if ( dragging != null ) {
            lx = dragging.getX();
            ty = dragging.getY();
            rx = lx + dragging.getWidth();
            by = ty + dragging.getHeight();
            if ((cx>=lx) && (cx<=rx) && (cy>=ty) && (cy<=by)) {
                mOffsetX = cx - lx; // offset from mouse pointer to loc
                mOffsetY = cy - ty; // of region
            }
        }
    }

    public void mouseReleased(MouseEvent e) {

        dragging = null;
    }

}