🚀 go-pugleaf

Ok, things are starting to fall into place a little better.  One other
functionality however is not being reinstated when I open a saved file. I
make use of Drag 'n Drop in my application.  Several instances of an object
that is getting saved is a class I named TargetPanel which extends JPanel
implements Serializable and in its constructor it calls a method called
installDnD().

installDnD() and associated inner class TargetPanelContainerListener are as
follows:

public class TargetPanel extends JPanel implements Serializable
{
    public TargetPanel()
   {
      ...
      installDnD();
   }
   ...
   ...
   protected void installDnD()
  {
    //setDragEnabled(true);
    setTransferHandler(new ComponentTransferHandler());
    addContainerListener(new TargetPanelContainerListener());
  }

  class TargetPanelContainerListener extends ContainerAdapter implements
Serializable
  {
     public void componentAdded(ContainerEvent e)
     {  System.out.println("entering componentAdded");
       if(e.getChild() instanceof InputTool)
       {
         //Make sure every InputTool knows what row its in
         InputTool comp = (InputTool)e.getChild();
         comp.setItemNumber(TargetPanel.this.getRowNumber());
         //Set the isDirty flag
         if(DocumentPanel.isDirty == false)
            DocumentPanel.isDirty = true;
       }
     }
  }

When I open a saved file, I wound up manually iterating over every instance
of the TargetPanel(s) and calling installDnD() on each one in order to
reinstate each TargetPanel as being a viable drop target for transferable
components.  Is this usual? Wouldn't this functionality be saved. I
shouldn't have to do that should I?

Alan