🚀 go-pugleaf

Hi there,

I'm working on a Drag 'n Drop project. I simply want to drag items from a
class that extends JList to another class that extends JPanel. In my
project, the class that extends JList is named: MutableList.  The class that
extends JPanel is named:
TargetPanel.  It is supposed to be a simple one-way COPY procedure. I have
it set up so that MutableList has single selection and displays objects that
represent various types of items: radiobutton, checkbox, listbox, textbox,
etc.  Each of these are rendered using a class that implements
ListCellRenderer; which extends JLabel and renders an image of the various
items into MutableList.

This much is working so far. All my code compiles fine.  The problem I am
facing now is at runtime during the actual drop procedure.  I have no
problem selecting an item from the MutableList and begin dragging it over to
the TargetPanel.  The TargetPanel class has a method called
addElement(Component c).  Here is what it looks like:

public void addElement(Component c)
{
    add(c);
    Component[] comp = this.getComponents();
    if(comp[0] instanceof MyComponent)
      System.out.println("comp is instanceof MyComponent");
    repaint();
}

Note the MyComponent object mentioned in the method. I test to ensure that
TargetPanel did indeed receive the drop with the instanceof operator. When I
run this code, I do indeed get the println statement executed, so I know its
there. The MyComponent object extends JLabel and is a new instance
representing a copy of the original item in MutableList.
Now, note that I then call repaint().  This is an attempt in making this
instance of MyComponent visibly appear in TargetPanel. Well, surprise,
surprise!  It doesn't!

What am I doing wrong?  How do I make MyComponent appear in TargetPanel?

Please advise,

Alan