/* File:  mPoint.java */

import java.awt.*;

public abstract class mPoint 
{
  // Instance variables:
  protected int x, y;      // location of moving point
  protected int dx, dy;    // displacement of moving point
  protected Color color;   // color of moving point
  
  // Constructor:
  public mPoint( int new_x, int new_y ) 
  {
    x = new_x; y = new_y;
    dx = 1; dy = 1;
    color = Color.black;
  }
  
  // Accessors and mutators:
  public int getX() { return x; }
  public int getY() { return y; }
  public void setPoint( int new_x, int new_y ) 
  {  x = new_x; y = new_y;
  }
  public void setDelta( int new_dx, int new_dy ) 
  {  dx = new_dx; dy = new_dy;
  }
  public Color getColor() { return color; }
  public void setColor( Color new_color ) 
  {  color = new_color;
  }
  
  // Class method:
  public void move() 
  {
    x += dx; y += dy;
  }
  
  // Class methods to be implemented by subclasses:
  public abstract void paint( Graphics g );
  public abstract void checkBoundary( Rectangle rect );
  public abstract boolean isInside( int some_x, int some_y );

} // end of mPoint class