🚀 go-pugleaf

Ramon F Herrera wrote:
> 
> This is a problem of some listeners being applied to the
> wrong object.
> 
> I am trying to write an application which places a
> JAI image on top of a JPanel and then performs some
> rubberbanding on the image.
> 
> I used the standard JBuilder wizard "New Application" and
> obviously I have added my own code as you can see below.
> 
> This is one of the critical pieces of code:
> 
>   ScrollingImagePanel sip = new ScrollingImagePanel(img, 950, 645);
>   frame.getContentPane().add(sip);
>   MainFrame frame = new MainFrame();
> 
> Later on, at the end of jbInit() I have these 2 lines:
> 
>    contentPane.addMouseListener(this);
>    contentPane.addMouseMotionListener(this);
> 
> Those 2 lines allow me to perform the rubberbanding on the
> JPanel (without the ScrollingImagePanel on top of it).
> So what I need is something like this (I think):

Rubber-banding might also be done by using a glass pane,
at least that's an approach I'd look into.  Have you done
the requisite Google on the topic?

Otherwise, you have two choices.

1. MainFrame can have a private ivar which is
set via

   setSIP(SIP sip) {
     this.sip = sip;
     sip.addMouseListener(this);
     sip.addMouseMotionListener(this);
   }

2. You can subclass the content pane, override the
    add() method.  Then set that custom content pane
    into your MainFrame via its "setContentPane()".
    Not too long ago, I think I read a JDJ article
    which did just this, but for what reason, I cannot
    remember.


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