import java.awt.*;
import java.applet.*;

public class SimpleTrackMouse extends Applet {

   int mouse_x, mouse_y;  // mouse coordinates
   String modifierKeys = "";  // special keys that are held down
   Color displayColor = Color.black;
   
   public void init() {   // I want a white background
      setBackground(Color.white);
   }
   
   public void paint(Graphics g) {
      int w = size().width;  // get the width of the applet
      int h = size().height; // get the height of the applet
      g.setColor(Color.blue);
      g.drawRect(0,0,w-1,h-1);  // draw a frame for the applet area
      g.setColor(Color.black);
      g.drawString(modifierKeys, 4, 20);
      g.setColor(displayColor);
      g.drawString("(" + mouse_x + "," + mouse_y + ")",
           mouse_x, mouse_y);
   }  // end of paint()
   
   void setInfo(Event evt, int x, int y) {
         // set up the information about event for display
      mouse_x = x;
      mouse_y = y;
      modifierKeys = "";
      if (evt.shiftDown())
         modifierKeys += "Shift ";
      if (evt.controlDown())
         modifierKeys += "Control ";
      if (evt.metaDown())
         modifierKeys += "META ";
      if ((evt.modifiers & Event.ALT_MASK) != 0)
         modifierKeys += "ALT ";
   }
   
   public boolean mouseMove(Event evt, int x, int y) {
      setInfo(evt, x, y);
      displayColor = Color.black;
      repaint();
      return true;
   }
   
   public boolean mouseDrag(Event evt, int x, int y) {
      setInfo(evt, x, y);
      displayColor = Color.red;  // red when mouse is down
      repaint();
      return true;
   }
   
}  // end of class SimpleMouseTracker