🚀 go-pugleaf

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):

     sip.addMouseListener(this);
     sip.addMouseMotionListener(this);

However, the variable 'sip' is out of reach at that point.

The question is: given this statement that inserts an object:

    frame.getContentPane().add(sip);

How can I retrieve that 'sip' from the object.
I guess am looking for something like this:

    sip = frame.getContentPane().retrieveScrollingImagePanel;

Thanks to anyone that can figure this one out...

-Ramon F Herrera


------------------------------------------------------------------

package widgetmaker;

import javax.swing.*;
import javax.media.jai.*;
import javax.media.jai.widget.*;


/**
  * <p>Title: WidgetMaker</p>
  * <p>Description: Making Widgets by Click & Drag</p>
  * <p>Copyright: Copyright (c) 2004</p>
  * <p>Company: Herrera Creations</p>
  * @author Ramon F Herrera
  * @version 1.0
  */

public class WidgetMaker {
   boolean packFrame = false;

   //Construct the application
   public WidgetMaker(String fileName) {

     RenderedOp img = JAI.create("fileload", fileName);
     ScrollingImagePanel sip = new ScrollingImagePanel(img, 950, 645);

     MainFrame frame = new MainFrame();
// I wish I could do this: new MainFrame(sip);

     if (packFrame) {
       frame.pack();
     }
     else {
       frame.validate();
     }

// Set display name and layout.
     frame.setTitle(getClass().getName() + ": " + fileName);

// Display the image.
     frame.setLocation(40, 0);
     frame.getContentPane().add(sip);
     frame.pack();
     frame.show();
   }


   //Main method
   public static void main(String[] args) {
     String fileName = args[0];

     try {
       UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
     }
     catch (Exception e) {
       e.printStackTrace();
     }
     new WidgetMaker(args[0]);
   }
}


-------------------------------------------------


package widgetmaker;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.media.jai.widget.ScrollingImagePanel;

/**
  * <p>Title: WidgetMaker</p>
  * <p>Description: Making Widget by Click & Drag</p>
  * <p>Copyright: Copyright (c) 2004</p>
  * <p>Company: Herrera Creations</p>
  * @author Ramon F Herrera
  * @version 1.0
  */

public class MainFrame
     extends JFrame implements MouseListener, MouseMotionListener {

   int x, y;

   final Stroke[] strokes = new Stroke[10];
   int mouseX = 0, mouseY = 0;
   int index = 0;
   boolean shouldErase;
   public ScrollingImagePanel sp;

   JPanel contentPane;

[...]

    contentPane.addMouseListener(this);
    contentPane.addMouseMotionListener(this);