Ellipse2D.java

/* Copyright (C) 2000  Free Software Foundation

   This file is part of libjava.

This software is copyrighted work licensed under the terms of the
Libjava License.  Please consult the file "LIBJAVA_LICENSE" for
details.  */

package java.awt.geom;

/**
 * @author Tom Tromey <tromey@cygnus.com>
 * @date April 16, 2000
 */

public abstract class Ellipse2D extends RectangularShape
{
  protected Ellipse2D ()
  {
  }

  public boolean contains (double x, double y)
  {
    double rx = getWidth () / 2;
    double ry = getHeight () / 2;
    double tx = (x - getCenterX ()) / rx;
    double ty = (y - getCenterY ()) / ry;
    return tx * tx + ty * ty <= 1.0;
  }

  public boolean contains (double x, double y, double w, double h)
  {
    double x2 = x + w;
    double y2 = y + h;
    return (contains (x, y) && contains (x, y2)
	    && contains (x2, y) && contains (x2, y2));
  }

  public PathIterator getPathIterator (AffineTransform at)
  {
    // fixme;
    return null;
  }

  public boolean intersects (double x, double y, double w, double h)
  {
    // fixme
    return false;
  }

  public static class Double extends Ellipse2D
  {
    public double height;
    public double width;
    public double x;
    public double y;

    public Double ()
    {
      height = width = x = y = 0;
    }

    public Double (double x, double y, double w, double h)
    {
      this.x = x;
      this.y = y;
      this.height = h;
      this.width = w;
    }

    public Rectangle2D getBounds2D ()
    {
      return new Rectangle2D.Double (x, y, width, height);
    }

    public double getHeight ()
    {
      return height;
    }

    public double getWidth ()
    {
      return width;
    }

    public double getX ()
    {
      return x;
    }

    public double getY ()
    {
      return y;
    }

    public boolean isEmpty ()
    {
      return height <= 0 || width <= 0;
    }

    public void setFrame (double x, double y, double w, double h)
    {
      this.x = x;
      this.y = y;
      this.height = h;
      this.width = w;
    }
  }

  public static class Float extends Ellipse2D
  {
    public float height;
    public float width;
    public float x;
    public float y;

    public Float ()
    {
      height = width = x = y = 0;
    }

    public Float (float x, float y, float w, float h)
    {
      this.x = x;
      this.y = y;
      this.height = h;
      this.width = w;
    }

    public Rectangle2D getBounds2D ()
    {
      return new Rectangle2D.Float (x, y, width, height);
    }

    public double getHeight ()
    {
      return height;
    }

    public double getWidth ()
    {
      return width;
    }

    public double getX ()
    {
      return x;
    }

    public double getY ()
    {
      return y;
    }

    public boolean isEmpty ()
    {
      return height <= 0 || width <= 0;
    }

    public void setFrame (float x, float y, float w, float h)
    {
      this.x = x;
      this.y = y;
      this.height = h;
      this.width = w;
    }

    public void setFrame (double x, double y, double w, double h)
    {
      this.x = (float) x;
      this.y = (float) y;
      this.height = (float) h;
      this.width = (float) w;
    }
  }
}