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Catch mouseEntered or mouseExited while Dragging

baresse
baresse asked
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Last Modified: 2008-03-10
Hi,

I've written an applet in which I want to catch the mouseEntered and mouseExited event on a component while the user is dragging over it.

It's works fine with Netscape, but not with Internet Explorer...

In Internet Explorer the MouseExited() method raises when the user release the button !

It's a problem for me because, I use this method to automatically scroll my image in a scrollpane when the user exits the component while he's dragging.

I'm looking for code...

Thanks
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Commented:
Hi 'baresse',

This example I made to test the feature (or bug :-) you described.
-----------------
/*
      A basic extension of the java.applet.Applet class
 */

import java.awt.*;
import java.applet.*;

public class applet_tester extends Applet
{
      public void init()
      {
            // Take out this line if you don't use symantec.itools.net.RelativeURL or symantec.itools.awt.util.StatusScroller
            symantec.itools.lang.Context.setApplet(this);
      
            // This code is automatically generated by Visual Cafe when you add
            // components to the visual environment. It instantiates and initializes
            // the components. To modify the code, only use code syntax that matches
            // what Visual Cafe can generate, or Visual Cafe may be unable to back
            // parse your Java file into its visual environment.
            //{{INIT_CONTROLS
            setLayout(null);
            setSize(426,266);
            tester_button = new java.awt.Button();
            tester_button.setLabel("Tester");
            tester_button.setBounds(144,96,151,32);
            tester_button.setBackground(new Color(12632256));
            add(tester_button);
            status = new java.awt.Label("outside",Label.CENTER);
            status.setBounds(60,156,311,37);
            add(status);
            //}}
      
            //{{REGISTER_LISTENERS
            SymMouse aSymMouse = new SymMouse();
            tester_button.addMouseListener(aSymMouse);
            //}}
      }
      
      //{{DECLARE_CONTROLS
      java.awt.Button tester_button;
      java.awt.Label status;
      //}}

      class SymMouse extends java.awt.event.MouseAdapter
      {
            public void mouseExited(java.awt.event.MouseEvent event)
            {
                  Object object = event.getSource();
                  if (object == tester_button)
                        testerButton_MouseExited(event);
            }

            public void mouseEntered(java.awt.event.MouseEvent event)
            {
                  Object object = event.getSource();
                  if (object == tester_button)
                        testerButton_MouseEntered(event);
            }
      }

      void testerButton_MouseEntered(java.awt.event.MouseEvent event)
      {
            // to do: code goes here.
                  
            //{{CONNECTION
            // Set the text for Label...
            status.setText("Inside");
            //}}
      }

      void testerButton_MouseExited(java.awt.event.MouseEvent event)
      {
            // to do: code goes here.
                  
            //{{CONNECTION
            // Set the text for Label...
            status.setText("Outside");
            //}}
      }
}

----------------
It worked fine on the Netscape 4.5
It worked fine on IE 4.0

Can you please test it on your machine and tell me?

Cheers,
  Nikolay

Author

Commented:
Yes this feature is fine for me too...

But, it's while the user is "Dragging" with the mouse there is a problem...

My component has a MouseMotionListener too, and implements some
feature is the "mouseDragged()" method.

The problem is that the "mouseEntered()" and the "mouseExited()" methods aren't executed while the user is "dragging" (i.e. mouseDragged() method is executing). They are just fire after the user releases the mouse button and so stop dragging.

Sorry.

Commented:
I see your point. I modified the example and it really does not work under IE 4.0.

I can suggest a nasty work around. When you detect IE in you applet, start a separate thread that checks for the mouse position over the component and does what it needs.

Cheers,
  Nik
Commented:
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Author

Commented:
It was nearly my solution...

Thanks for having look at my problem !

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