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Article View: borland.public.jbuilder.java.swing
Article #1268

Re: Mouse moved event

#1268
From: George
Date: Wed, 10 Mar 2004 19:36
185 lines
6254 bytes
John,

Please ignore my earlier post.  The following code is simpler.

As it stands it doesnt work when I register a MouseInputAdapter on the list.
However if you comment out that code and instead register a
MouseMotionListener on the list (just uncomment the section I have
commented), it works correctly.

George

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

public class TestMouse1 extends JFrame {
  public TestMouse1() throws HeadlessException {
    list.setModel(new AbstractListModel() {
                    public Object getElementAt(int index) {
                    return Integer.toString(index);
                    }
                    public int getSize() {
                      return 50;
                    }});
//    list.addMouseMotionListener(new MouseMotionListener() {
//      public void mouseMoved(MouseEvent event) {
//        System.out.println("Mouse moved");
//      }
//      public void mouseDragged(MouseEvent event) {
//        System.out.println("Mouse dragged");
//      }
//
//    });

    list.addMouseListener(new MouseInputAdapter() {
      public void mouseMoved(MouseEvent event) {
        System.out.println("Mouse moved");
      }
      public void mouseDragged(MouseEvent event) {
        System.out.println("Mouse dragged");
      }

    });

    this.getContentPane().add(list, BorderLayout.CENTER);

  }

  public static void  main(String [] args) {
    TestMouse1 tm1 = new TestMouse1();
    tm1.show();
  }

  JList list = new JList();
}


"George" <geo_54321@yahoo.com> wrote in message
news:404f4bed$1@newsgroups.borland.com...
> John
>
> Here is the code that demonstrates the problem.  There are 2 classes:
> TestMouse and ObjectListMouseHandler.
>
> TIA.
> George
>
>
> import javax.swing.*;
> import java.awt.*;
>
> public class TestMouse extends JFrame {
>   public TestMouse() {
>     list.setModel(new ListModel());
>     list.setFixedCellWidth(200);
>     list.addMouseListener(new ObjectListMouseHandler());
>     scrollPane.setViewportView(list);
>     panel.setLayout(new CardLayout());
>     panel.add(scrollPane, "Tab1");
>     this.getContentPane().add(panel);
>     this.setSize(this.getToolkit().getScreenSize());
>   }
>
>   public static void main(String[] args) {
>     TestMouse tm = new TestMouse();
>     tm.show();
>   }
>
>   JPanel panel = new JPanel();
>   JList list = new JList();
>   JScrollPane scrollPane = new JScrollPane();
>
>   private class ListModel extends AbstractListModel {
>     public Object getElementAt(int index) {
>       return Integer.toString(index);
>     }
>
>     public int getSize() {
>       return 50;
>     }
>
>   }
> }
>
>
/*--------------------------------------------------------------------------
> ------------------------------------*/
>
> import java.awt.*;
> import java.awt.event.*;
> import javax.swing.event.*;
> import javax.swing.*;
>
> /**
>  * <p>ObjectListMouseHandler</p>
>  * <p>Mouse handler class for the database object list.</p>
> */
> public class ObjectListMouseHandler extends MouseInputAdapter {
>   public ObjectListMouseHandler() {
>   }
>
>   public void mouseClicked(MouseEvent e) {
>     System.out.println("Mouse clicked");
>
>   }
>   public void mouseEntered(MouseEvent e) {
>     System.out.println("Mouse entered ");
>   }
>
>   public void mouseExited(MouseEvent e) {
>     System.out.println("Mouse exited ");
>   }
>
>   public void mousePressed(MouseEvent e) {
>     System.out.println("Mouse pressed ");
>    }
>
>   public void mouseReleased(MouseEvent e) {
>     System.out.println("Mouse released");
>    }
>
>    public void mouseDragged(MouseEvent e) {
>     System.out.println("Mouse dragged");
>    }
>
>   public void mouseMoved(MouseEvent e) {
>     System.out.println("Mouse moved at " + e.getX() + " : " + e.getY());
>   }
>
>   private JPopupMenu popupMenu;
>   private JList list;
> }
>
>
> "John McGrath [TeamB]" <ng-b@JPMcGrath.net> wrote in message
> news:404e24cf@newsgroups.borland.com...
> > On 3/8/2004 at 10:27:09 AM, George wrote:
> >
> > > I have a subclassed MouseInputAdapter to handle mouse events
> > > on the JList.  I find that I receive all events except
> > > mouseMoved(MouseEvent e).  This method never gets called.
> >
> > This should work.  Can you provide a runnable sample application that
> > demonstrates the problem?
> >
> > > The documentations for mouseMoved says "Invoked when the mouse cursor
> > > has been moved onto a component but no buttons have been pushed. "
> > > Not sure how this differs from mouseEntered which is described as
> > > "Invoked when the mouse enters a component. "
> >
> > A single mouseEntered event occurs when the mouse moves from outside
> > the bounds of the component to inside its bounds.  The mouseMoved event
> > will occur multiple times as you move the mouse within the component.
> >
> > -- 
> > Regards,
> >
> > John McGrath [TeamB]
> >
> > ---------------------------------------------------
> > Before sending me e-mail, please read:
> >     http://www.JPMcGrath.net/newsgroups/e-mail.html
>
>
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From: "George" <geo_54321@yahoo.com>
Newsgroups: borland.public.jbuilder.java.swing
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Subject: Re: Mouse moved event
Date: Wed, 10 Mar 2004 14:36:08 -0500
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