UI Event Targetting

Question

I've got an application running under SE 1.4.1 and SE 1.4.2 on Windows 98 and I'm getting an problem whereby mouse presses, releases and clicks are not being forwarded to the correct components.
The problem is fairly easy to replicate and pressing the right mouse and middle mouse buttons a few times seems to fix the problem, but isn't a solution I want to have to live with.
The app. below was run and the dialog shown (just press the button on the frame). The tree nodes on the dialog were all expanded and the viewport scrolled up and down several times with the mousewheel. This then stops the mouse clicks working.
package app;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Frame extends JFrame implements AWTEventListener, ActionListener
    private JDialog dlg = null;
    public static void main(String[] args) throws HeadlessException
        Frame frame1 = new Frame();
        frame1.show();
    public Frame() throws HeadlessException
        setSize(new Dimension(800, 400));
        JButton button = new JButton();
        button.setText("Show Dialog");
        button.addActionListener(this);
        getContentPane().setLayout(new FlowLayout());
        getContentPane().add(button, null);
        Toolkit tk = getToolkit();
        tk.addAWTEventListener(this, MouseEvent.MOUSE_CLICKED + MouseEvent.MOUSE_PRESSED + MouseEvent.MOUSE_RELEASED + MouseEvent.MOUSE_EXITED + MouseEvent.MOUSE_ENTERED);
    public void eventDispatched(AWTEvent event2)
        if (event2.getID() == MouseEvent.MOUSE_CLICKED)
            MouseEvent me = (MouseEvent)event2;
            System.out.println("Click: " + me.getX() + ", " + me.getY() + " " + me.getButton() + " orig@" + me.getComponent().getClass().getName());
        else if (event2.getID() == MouseEvent.MOUSE_PRESSED)
            MouseEvent me = (MouseEvent)event2;
            System.out.println("Press: " + me.getX() + ", " + me.getY() + " " + me.getButton() + " orig@" + me.getComponent().getClass().getName());
        else if (event2.getID() == MouseEvent.MOUSE_RELEASED)
            MouseEvent me = (MouseEvent)event2;
            System.out.println("Release: " + me.getX() + ", " + me.getY() + " " + me.getButton() + " orig@" + me.getComponent().getClass().getName());
        else if (event2.getID() == MouseEvent.MOUSE_ENTERED)
            MouseEvent me = (MouseEvent)event2;
            System.out.println("Enter: " + me.getX() + ", " + me.getY() + " " + me.getButton() + " orig@" + me.getComponent().getClass().getName());
        else if (event2.getID() == MouseEvent.MOUSE_EXITED)
            MouseEvent me = (MouseEvent)event2;
            System.out.println("Exit: " + me.getX() + ", " + me.getY() + " " + me.getButton() + " orig@" + me.getComponent().getClass().getName());
    public void actionPerformed(ActionEvent ae)
        if (ae.getActionCommand().equals("Show Dialog"))
            //show the dialog
            dlg = new JDialog();
            dlg.setModal(true);
            dlg.getContentPane().setLayout(new BorderLayout());
            JScrollPane sp = new JScrollPane(new JTree());
            dlg.getContentPane().add(sp, BorderLayout.CENTER);
            JButton button = new JButton("Close Dialog");
            dlg.getContentPane().add(button, BorderLayout.SOUTH);
            button.addActionListener(this);
            dlg.setSize(new Dimension(200, 200));
            dlg.show();
        else if (ae.getActionCommand().equals("Close Dialog"))
            //close the dialog
            dlg.hide();
}Compiling and running the above gave this logging in the console which shows when the mouse entered a component, when it exits a component and when the mouse is pressed, released and clicked over a component:
Enter: 136, 262 0 [email protected]
Exit: 136, 264 0 [email protected]
Enter: 136, 0 0 [email protected]
Exit: 142, -2 0 [email protected]
Enter: 142, 262 0 [email protected]
Exit: 142, 260 0 [email protected]
Enter: 141, 259 0 [email protected]
Exit: 145, 261 0 [email protected]
Enter: 146, 262 0 [email protected]
Exit: 146, 264 0 [email protected]
Enter: 146, 0 0 [email protected]          <--(mouse moved on to button)
Press: 154, 299 1 [email protected]        <--(mouse pressed)
Release: 154, 299 1 [email protected]      <--(mouse released)
Click: 154, 299 1 [email protected]        <--(mouse click happens)
Exit: 148, -6 0 [email protected]          <--(now move off the button)
Enter: 147, 257 0 [email protected]
Exit: 15, -11 0 [email protected]
Enter: 40, 3 0 [email protected]
Exit: 157, 273 0 [email protected]
Enter: 158, 10 0 [email protected]            
Exit: 168, 26 0 [email protected]
Press: 259, 464 1 [email protected]
Release: 259, 464 1 [email protected]
Click: 259, 464 1 [email protected] can clearly be seen, the event for the mouse moving over the various components has the correct source (the button or tree) but when the mouse is pressed while over the button, the event comes through with the source as the dialog beneith the button.
I've searched the bug database but can't find anything about this, but my test app above should not be able to cause this error.
Any ideas how to fix this?

Answer 1

Hope this will help:
var myList = ["Item 1","Item 2","Item 3","Item 4","Item 5","Item 6","Item 7","Item 8","Item 9","Item 10"];
var win = new Window('dialog', 'myDlg');
var ddL = win.add('dropdownlist',undefined,myList);
ddL.onChange = function(){alert("Item changed");}
win.center();
win.show();
tomaxxi
http://indisnip.wordpress.com/