import java.awt.*;

/**
 *  A canvas that knows how to paint a monogram.
 *  Contract:
 *        will paint when asked
 *        will update monogram when asked
 */
public class AlphaCanvas extends Canvas
{
    /**
     *  What to paint.
     */
    protected SafeMonogram mono = new SafeMonogram( 'l', 's' );

    /**
     *  Set up by telling a smarts to look out for me and telling Java
     *  about the keyListener that will handle my events.
     */
    public AlphaCanvas()
    {
	super();
	AlphaSmarts smarts = new AlphaSmarts( this );
	this.addKeyListener( new SimpleKeyListener( smarts ) );
    }

    /**
     *  How to tell me if you want my monogram to change.
     *  Note:  also tells Java I need to be repainted.
     */
    public void setText( SafeMonogram m )
    {
	this.mono = m;
	this.repaint();
    }


    /**
     *  How Java tells me it's time to paint myself.
     */
    public void paint( Graphics g )
    {
	g.drawChars( this.mono.getChars(),0,2,10,10);
    }

    /**
     *  Stuff to tell Java what size I like to be.
     */
    public Dimension getPreferredSize()
    {
	return new Dimension( 20, 20 );
    }
}