Desktop.java

import java.awt.*;
import java.applet.*;
import java.awt.image.*;
import java.awt.graphics.*;
import java.util.*;

public class Desktop extends Canvas
{
	MAE			theApplet;
	Image		offScreenImage,theDesktop;
	Graphics	offScreenImageGC,g;
	int			DesktopWidth,DesktopHeight;
	NewMenuBar	MenuBar;
	
	static final byte pattern[] = {(byte)0x00,(byte)0xFF,(byte)0x00,(byte)0xFF,(byte)0x00,(byte)0xFF,(byte)0x00,(byte)0xFF};
	private static final byte bmap[] = {(byte)000,(byte)255};
	
	public Desktop(MAE app)
	{
        byte[] 	pixels = new byte [40*40];

		theApplet = app;
		DesktopWidth = theApplet.size().width;
		DesktopHeight = theApplet.size().height;
		MenuBar = null;
		IndexColorModel model;
		
		offScreenImage = theApplet.createImage(DesktopWidth,DesktopHeight);
		offScreenImageGC = offScreenImage.getGraphics();

		model = new IndexColorModel(1,2,bmap,bmap,bmap,3);
        for (int index=0,y=0;y<40;y++)
        {
            for (int x=0;x<40;x=x+2)
            {
            	if (y%2==0)
            	{
               		 pixels[index++] = (byte)0;
               		 pixels[index++] = (byte)1;
               	}
               	else
               	{
               		 pixels[index++] = (byte)1;
               		 pixels[index++] = (byte)0;
               	}
            }
        }
 		theDesktop = createImage (new MemoryImageSource (40,40,model,pixels,0,40));
  		DrawDesktop();
	}
	
	public boolean mouseDown(Event e, int x, int y)
	{
		theApplet.ApplicationThread.AFC.xMousePos = (short)x;
		theApplet.ApplicationThread.AFC.yMousePos = (short)y;
		theApplet.ApplicationThread.AFC.PostNewEvent((short)1);
		theApplet.ApplicationThread.AFC.mouseDown = true;

		return true;
	}

	public boolean mouseUp(Event e, int x, int y)
	{ 
		theApplet.ApplicationThread.AFC.xMousePos = (short)x;
		theApplet.ApplicationThread.AFC.yMousePos = (short)y;
		theApplet.ApplicationThread.AFC.PostNewEvent((short)2);
		theApplet.ApplicationThread.AFC.mouseDown = false;

		return true;
	}

	public boolean mouseMove(Event e, int x, int y)
	{ 
		theApplet.ApplicationThread.AFC.xMousePos = (short)x;
		theApplet.ApplicationThread.AFC.yMousePos = (short)y;

		return true;
	}

	public boolean mouseDrag(Event e, int x, int y)
	{ 
		theApplet.ApplicationThread.AFC.xMousePos = (short)x;
		theApplet.ApplicationThread.AFC.yMousePos = (short)y;

		return true;
	}

	public boolean keyDown(Event e, int key)
	{ 
		if (theApplet.ApplicationThread.AFC.keydown) theApplet.ApplicationThread.AFC.PostNewEvent((short)5,key);	// (autokey event)
		else theApplet.ApplicationThread.AFC.PostNewEvent((short)3,key);											// (key down event)
		theApplet.ApplicationThread.AFC.keydown = true;

		return true;
	}

	public boolean keyUp(Event e, int key)
	{ 
		theApplet.ApplicationThread.AFC.PostNewEvent((short)4,key);
		theApplet.ApplicationThread.AFC.keydown = false;

		return true;
	}
	
	public void paint(Graphics graph)
	{
		graph.drawImage(offScreenImage,0,0,null);
	}
	
	public void DrawDesktop()
	{
		for (int i=21;i<DesktopHeight;i=i+40) for (int j=0;j<DesktopWidth;j=j+40) offScreenImageGC.drawImage(theDesktop,j,i,null);
    }

	public void Redraw()
	{
  		g = getGraphics();
		g.drawImage(offScreenImage,0,0,null);
    }

}