wait cursor

[Sabina Norderhaug]

I have wait cursor set in action_Performed as:
mLoginDialog.startWaitCursor(mLoginDialog.getRootPane());
where

/** Sets cursor for specified component to Wait cursor */
public static void startWaitCursor(JComponent component) {
RootPaneContainer root =
(RootPaneContainer)component.getTopLevelAncestor();
root.getGlassPane().setCursor(WAIT_CURSOR);
root.getGlassPane().setVisible(true);
}
/** Sets cursor for specified component to normal cursor */
public static void stopWaitCursor(JComponent component) {
RootPaneContainer root =
(RootPaneContainer)component.getTopLevelAncestor();
root.getGlassPane().setCursor(DEFAULT_CURSOR);
root.getGlassPane().setVisible(false);
}

When I click the button, I see default wait cursor (sandglass) no probelm. But if I move mouse outside this frame and then move it back, cursor changes to one of the resize cursor, so it looks like either horizontal or vertical 2 point arrow.
I wonder why this is happening and how can I avoid it?
Thank you,
Sabina

[Mary Taylor]

This question was passed to the Swing/AWT forum where it was closed because the question already existed in this forum. Circle with no answers. Not very helpful. The bartender in the forum the message was passed to closed the message because it was a duplicate of the message that was passed to that forum. How about an answer?

[Nathan Pruett]

Actually, this code works fine... the actual problem is that the event thread is being blocked in some way, which keeps the cursor from changing back to what it's supposed to be after the native frame changes it to the resize cursor. Try the code below, then comment out the new thread being launched in the ActionListener (and leave the contents of the run() inside the actionPerformed()) and you will see the same behavior.

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Cursor;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class SleepTime extends JFrame {
    
    public SleepTime() {
        JPanel p = new JPanel();
        JButton b = new JButton( "Sleep" );
        b.addActionListener( new ActionListener() {
            public void actionPerformed( ActionEvent e ) {
                startWaitCursor( getRootPane() );
                Thread t= new Thread( new Runnable() {
                    public void run() {
                        try {
                            Thread.sleep( 3000 );
                        }
                        catch (InterruptedException x) {
                            x.printStackTrace();
                        }
                        stopWaitCursor( getRootPane() );
                    }
                } );
                t.start();
            }
        } );
        p.add( b );
        getContentPane().add( p, BorderLayout.SOUTH );
    }
    
    public static void main( String[] args ) {
        JFrame f = new SleepTime();
        f.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
        f.setSize( 300, 300 );
        f.setLocationRelativeTo( null );
        f.setVisible( true );
    }
    
    /** Sets cursor for specified component to Wait cursor */
    public static void startWaitCursor(JComponent component) {
        Component c = component.getRootPane().getGlassPane();
        c.setCursor( Cursor.getPredefinedCursor( 
                Cursor.WAIT_CURSOR ) );
        c.setVisible(true);
    }
    /** Sets cursor for specified component to normal cursor */
    public static void stopWaitCursor(JComponent component) {
        Component c = component.getRootPane().getGlassPane();
        c.setCursor(Cursor.getPredefinedCursor( 
                Cursor.DEFAULT_CURSOR ) );
        c.setVisible(false);
    }
}