Movable components interacting with JScrollPane

Question

I am creating movable components. The class is designed as an extension to JPanel and contains a label and a textfield. The Panel responds to the mouse and moves itself around a JPanel which is inside the JScrollPane according to the user. This will eventially be a layout process so users of this program can make things look the way they want.
I can't seem to get the JScrollPane to recognize when a component is moved outside it's immediate area and scroll. I'm looking through the archives but I am not running into answers because I don't know what to look for.
Do I need to look at the scrollable interface? Do I need to throw an event which will notify the Scrollpane. Any hints or answer would be greatly appreciated!
Here is my main class definition which may provide some clues:
public static void main (String[] args) {
JFrame view = new JFrame( "Testing" );
JPanel mainPanel = new JPanel();
JScrollPane scrollPane = new JScrollPane( mainPanel );
mainPanel.add( new movablePanel( "Label", "Testing" ) );
mainPanel.add( new MovablePanel( "Label", "Text" ) );
view.getContentPane().add( scrollPane );
view.validate();
view.repaint();
view.show();

Answer 1

Here's what you should do.
In your panel's mouseDragged or mouseMoved event handler, add:
x = this.getLocation().x;
y = this.getLocation().y;
maxX = this.getLocation().x+this.getSize().width;
maxY = this.getLocation().y+this.getSize().height;
scrollminX = ScrollPane.getViewPort().getViewPosition().x
scrollminY = ... getViewPosition().y
scrollmaxX = scrollminX + ScrollPane.getViewPort().getExtentSize().width;
scrollmaxY = scrollminY + ... getExtentSize().height
now test to see if everything is in range