messagecanvas.java

Barber Shop algorithm Synchronization Simulator

/* File: MessageCanvas.java
 *
 * This class provides message canvas for the applet GUI.
 * It will print the statuses of customers and barbers on the GUI.
 *
 * @author:      Jie Zhang
 * Last Updated: 07/18/2002
 */

import java.awt.*;

class MessageCanvas extends Canvas
{
	private Font font;
	private FontMetrics fm;
	private int[] barberStatus;
	private int[] customerStatus;
	private int[] serviceStatus;		//store the customer id that is cutting hair for each barber
								        //serviceStatus[i]=j, Barber i is cutting hair for customer j

	private int msgHeight;
    private int msgWidth;
	private int bn, cn;
	private int frameDelay = 256;

	public MessageCanvas( )
	{
		resize(size().width, 50);
		setBackground(Color.green);
		font = new Font("TimesRoman", 1, 18);
		fm = getFontMetrics(font);
        msgHeight = fm.getHeight();

	}

   public void setMessage(int barberN, int customerN)
    {
		bn = barberN;
		cn = customerN;
		barberStatus = new int[bn+1];
		customerStatus = new int[cn+1];
		serviceStatus = new int[bn+1];
		repaint();
    }


    void println(String s)
    {
        msgWidth = fm.stringWidth(s);
        repaint();
    }

    void println(int s, String st, int id)
	{
	        if(st.equals("b"))
	       		 	barberStatus[id] = s;
			else
				customerStatus[id] = s;
	        repaint();
   }

    void println(int s, String st, int id, int cid)
   	{
   	        if(st.equals("b"))
   	       	{ 	barberStatus[id] = s;
   	       		serviceStatus[id] = cid;
			}
   			else
   				customerStatus[id] = s;
   	        repaint();
   }


    public void paint(Graphics g)
    {
        g.setFont(font);
        int xpos = 40;
        int ypos = 30;

		g.drawString("Status of Customers: ", 60, 20);
		g.drawString("Status of Barbers: ", 380, 20);
		g.setFont(new Font("TimesRoman", 1, 12));

		for(int i=1; i<=cn;i++)
		{
			g.setColor(Color.black);
			g.drawString("C" + i, xpos, ypos+(12*i+5*(i-1)));
			if(customerStatus[i] == 0)
			{
				g.setColor(Color.yellow);
				g.fillOval(xpos+40, ypos+(2*i+15*(i-1)), 14, 14);
				g.drawString("Standing ...", xpos+80, ypos+(12*i + 5*(i-1)));
			}
			else if (customerStatus[i] == 1)
			{
				g.setColor(Color.gray);
				g.fillOval(xpos+40, ypos+(2*i+15*(i-1)), 14, 14);
				g.drawString("Cutting Hair...", xpos+80, ypos+(12*i + 5*(i-1)));
			}
			else if (customerStatus[i] == 2)
			{
				g.setColor(Color.blue);
				g.fillOval(xpos+40, ypos+(2*i+15*(i-1)), 14, 14);
				g.drawString("Waiting for Cashier", xpos+80, ypos+(12*i + 5*(i-1)));
			}
			else if (customerStatus[i] == 3)
			{
				g.setColor(Color.red);
				g.fillOval(xpos+40,ypos+(2*i+15*(i-1)), 14, 14);
				g.drawString("Finished the Hair Cut", xpos+80, ypos+(12*i + 5*(i-1)));
			}
			else if (customerStatus[i] == 4)
			{
				g.setColor(Color.red);
				g.fillOval(xpos+40, ypos+(2*i+15*(i-1)), 14, 14);
				g.drawString("Waiting to pay", xpos+80, ypos+(12*i + 5*(i-1)));
			}
			else if (customerStatus[i] == 5)
			{
				g.setColor(Color.blue);
				g.fillOval(xpos+40, ypos+(2*i+15*(i-1)), 14, 14);
				g.drawString("Sitting on the Sofa", xpos+80, ypos+(12*i + 5*(i-1)));
			}else if (customerStatus[i] == 6)
			{
				g.setColor(Color.red);
				g.fillOval(xpos+40, ypos+(2*i+15*(i-1)), 14, 14);
				g.drawString("Sitting on the BarberChair", xpos+80, ypos+(12*i + 5*(i-1)));
			}else if (customerStatus[i] == 7)
			{
				g.setColor(Color.red);
				g.fillOval(xpos+40, ypos+(2*i+15*(i-1)), 14, 14);
				g.drawString("Waiting to pay", xpos+80, ypos+(12*i + 5*(i-1)));
			}else if (customerStatus[i] == 9)
			{
				g.setColor(Color.green);
				g.fillOval(xpos+40, ypos+(2*i+15*(i-1)), 14, 14);
				g.drawString("Left ", xpos+80, ypos+(12*i + 5*(i-1)));
			}else if (customerStatus[i] == 10)
			{
				g.setColor(Color.gray);
				g.fillOval(xpos+40, ypos+(2*i+15*(i-1)), 14, 14);
				g.drawString("Finished, but hold the resources unnecessarily", xpos+80, ypos+(12*i + 5*(i-1)));
			}else if (customerStatus[i] == 11)
			{
				g.setColor(Color.gray);
				g.fillOval(xpos+40, ypos+(2*i+15*(i-1)), 14, 14);
				g.drawString("C1 hasn't finished but has to leave", xpos+80, ypos+(12*i + 5*(i-1)));
			}
		}
	 	xpos = 380;
	 	ypos = 40;
        for(int i=1; i<=bn; i++)
        {
			g.setColor(Color.black);
			g.drawString("B" + i, xpos, ypos+(15*i+10*(i-1)));
			if(barberStatus[i] == 0)
			{
				g.setColor(Color.yellow);
				g.fillOval(xpos+60, ypos+(2*i+22*(i-1)), 18, 18);
				g.drawString("Sleeping ...", xpos+120, ypos+(15*i + 10*(i-1)));
			}
			else if (barberStatus[i] == 1)
			{
				g.setColor(Color.gray);
				g.fillOval(xpos+60, ypos+(2*i+22*(i-1)), 18, 18);
				g.drawString("Cutting Hair for C"+serviceStatus[i], xpos+120, ypos+(15*i + 10*(i-1)));
			}
			else if (barberStatus[i] == 2)
			{
				g.setColor(Color.blue);
				g.fillOval(xpos+60, ypos+(2*i+22*(i-1)), 18, 18);
				g.drawString("Accepting Payment...", xpos+120, ypos+(15*i + 10*(i-1)));
			}
			else if (barberStatus[i] == 3)
			{
				g.setColor(Color.red);
				g.fillOval(xpos+60, ypos+(2*i+22*(i-1)), 18, 18);
				g.drawString("Finished the Hair Cut", xpos+120, ypos+(15*i + 10*(i-1)));
			}
			else if (barberStatus[i] == 4)
			{
				g.setColor(Color.gray);
				g.fillOval(xpos+60, ypos+(2*i+22*(i-1)), 18, 18);
				g.drawString("Waiting ... ", xpos+120, ypos+(15*i + 10*(i-1)));
			}


		}
    }
}