Hi All,
Good Morning,
I will appreciate much if somebody would help me about how to sustain a mouse over event. I mean when mouse is over, a process should run continuously and stop when the mouse exits.
Similarly for mouse pressed and mouse exited events.
Waiting for reply. Two duke dollars for this. !!
I guess you could write a global variable flag to indicate start and stop of a thread(process)
in the mouseEntered function
process=true;
in the mouseExited function
process=false;
but this has some problem because a thread doesn't stop(thread==null) when is told to because it only suggests.
Hi,
Morning? Your post states 6:15PM you must work nights.
How about the code below. It might give you some ideas.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.text.*;
public class MouseOver extends JFrame implements Runnable
{
private JLabel eeLabel, peLabel;
private boolean mousePressed;
private boolean mouseInside;
private boolean running;
public MouseOver()
{
Container cont = getContentPane();
eeLabel = new JLabel( " ", JLabel.CENTER );
cont.add( eeLabel, "North" );
peLabel = new JLabel( " ", JLabel.CENTER );
cont.add( peLabel, "South" );
setSize( 400, 400 );
cont.addMouseListener(
new MouseAdapter()
{
public void mouseEntered( MouseEvent me )
{
//
// Start running the upper clock if it is not already running.
//
mouseInside = true;
System.out.println( running );
if( !running )
{
running = true;
Thread t = new Thread( MouseOver.this );
t.start();
}
}
public void mouseExited( MouseEvent me )
{
//
// Stop any running clock.
//
mouseInside = false;
mousePressed = false;
running = false;
}
public void mouseClicked( MouseEvent me )
{
//
// Toggle click to allow start/stop with mouse click.
// Start running the lower clock if it is not already running.
//
mousePressed = !mousePressed;
if( !running )
{
running = true;
Thread t = new Thread( MouseOver.this );
t.start();
}
}
});
addWindowListener(
new WindowAdapter()
{
public void windowClosing( WindowEvent we )
{
System.exit( 0 );
}
});
}
//
// Method to update either or both clocks depending on user actions.
//
public void run()
{
SimpleDateFormat sdf = new SimpleDateFormat( "MM/dd/yyyy hh:mm:ss" );
while( mousePressed || mouseInside )
{
GregorianCalendar gc = new GregorianCalendar();
if( mousePressed )
{
peLabel.setText( sdf.format( gc.getTime() ) );
}
eeLabel.setText( sdf.format( gc.getTime() ) );
repaint();
try
{
Thread.sleep( 1000 );
}
catch( InterruptedException ie )
{
return;
}
}
}
public static void main(String[] args)
{
MouseOver mo = new MouseOver();
mo.setVisible( true );
}
}
Regards,
Manfred.
Hi Manfred,
Thanks a lot for the code and it is very enlightening for any further ideas. I too was thinking on the same lines. Actually what I have to implement is a text scroller(both ways), depending on the button on which the mouse over is there.
I was just wondering whether we could do without a Thread(messy business) And should we write to SUN to provide a mouse over event. Ha Ha. You example code was(is) admirably succinct and useful.
Thanks again
Ravi