/**
 * PaintPanel
 * 
 * Used by TryJFramePainting; an extension of JPanel that expects
 * a rectangle width when it is instantiated, and then draws
 * a blue rectangle with that width along with a red message.
 *
 * setNewWidth() causes the panel to be repainted with the new
 * width specified.
 *
 * whoops --- trusts its caller too much! Does *not* check if
 * the integer value passed is in the 10-400 range! BEWARE.
 * That should really be rectified, when this is made stand-alone...
 *
 * modified by: Sharon M. Tuttle
 * last modified: 2-26-01
 **/

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class PaintPanel extends JPanel
{
	private	int 	rectWidth;	// the desired width of the rectangle
					// to be painted

	// this constructor sets the width for the rectangle
	// given its integer parameter
	public PaintPanel(int width)
	{
		rectWidth = width;
	}
		
	// you want to implement paintComponent() here, not
	// paint()...
	public void paintComponent(Graphics g)
	{
		String		information;

		information = "I am a painted message";

		// NEED this! superclass of PaintPanel may need to do
		// some cleanup; this calls superclass's paintComponent()
		// method
		super.paintComponent(g);

		// paint a red message on the panel
		g.setFont(new Font("Serif", Font.ITALIC, 45));
		g.setColor(Color.red);
        	g.drawString(information, 10, 200);

		// paint a blue rectangle with width rectWidth on the panel
		g.setColor(Color.blue);

		// notice that rectangle now has width rectWidth...
		g.drawRect(50, 250, rectWidth, 100);
	}

	// repaint with the given value of width as the rectangle's 
	// new width
	public void setNewWidth(int newWidth)
	{
		rectWidth = newWidth;
		
		// this will force an execution of paintComponent()	
		repaint();
	}
}