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Article View: borland.public.jbuilder.java.swing
Article #1136

Re: Mouse moved event

#1136
From: George
Date: Fri, 12 Mar 2004 22:19
44 lines
2907 bytes
Ah ok.  One adapter class but two separate registrations.  I could kick
myself now. :-)

Thank for your help.
George

"John McGrath [TeamB]" <ng-b@JPMcGrath.net> wrote in message
news:40522ac0@newsgroups.borland.com...
> On 3/10/2004 at 2:36:08 PM, George wrote:
>
> > 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.
>
> The behavior you describe is exactly what I would expect.
>
> The code registers a MouseListener with the JList.  In other words, it
> asks the JList to call the listener's mouseClicked(), mouseEntered(),
> mouseExited(), mousePressed(), or mouseReleased() methods whenever the
> corresponding event occurs.
>
> The object that you pass to addMouseListener() is an anonymous subclass
> of MouseInputAdapter.  Since this class implements the MouseListener
> interface, it is acceptable to pass the object to addMouseListener().
>
> MouseInputAdapter provides empty implementations of the 5 methods
> listed above and these methods are not overridden in your anonymous
> subclass, so those empty implementations are called whenever the
> corresponding events occur.
>
> The fact that the object you pass to addMouseListener() implements the
> MouseMotionListener interface does not cause the JList to notify it of
> the MouseMotion events.  In order for that to happen, you must register
> it with the JList using the addMouseMotionListener() method.
>
> -- 
> Regards,
>
> John McGrath [TeamB]
>
> ---------------------------------------------------
> Before sending me e-mail, please read:
>     http://www.JPMcGrath.net/newsgroups/e-mail.html
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Subject: Re: Mouse moved event
Date: Fri, 12 Mar 2004 17:19:10 -0500
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