SmartEllipse.java

/**
 * SmartEllipse.java
 * Extends Java's Ellipse2D.Double class, adding the capabilities to
 * set color, rotation, location, and size, to move to a specified
 * location, and to display itself on a panel.
 */
public class SmartEllipse extends java.awt.geom.Ellipse2D.Double {
    private java.awt.Color _borderColor, _fillColor; // attributes
    private int _rotation;
    private final int STROKE_WIDTH = 2;

    public SmartEllipse(java.awt.Color aColor){ 
	_borderColor = aColor;
	_fillColor = aColor; // solid color to start
	_rotation = 0; // no rotation for now
    }
 
    // methods not provided by Java
    public void setBorderColor (java.awt.Color aColor) {
	_borderColor = aColor;
    }
    public void setFillColor (java.awt.Color aColor) {
	_fillColor = aColor;
    }
    public void setRotation (int aRotation) {
	_rotation = aRotation;
    }
    public java.awt.Color getFillColor()
    {
        return _fillColor;
    }
    public java.awt.Color getBorderColor()
    {
        return _borderColor;
    }

    // more readable versions of methods provided by Java
    public void setLocation (double x, double y) {
	this.setFrame (x, y, this.getWidth(), 
		       this.getHeight());
    }
    public void setSize (int aWidth, int aHeight) {
	this.setFrame(this.getX(), this.getY(), 
		      aWidth, aHeight);
    }
    public void move (int aChangeInX, int aChangeInY) {
	this.setFrame((int)this.getX()+aChangeInX,
		      (int)this.getY()+aChangeInY,
		      this.getWidth(),
		      this.getHeight());
    }

    public void fill (java.awt.Graphics2D aBetterBrush){
	java.awt.Color savedColor = aBetterBrush.getColor();
	aBetterBrush.setColor(_fillColor);
	aBetterBrush.fill(this); // paint a solid ellipse
	aBetterBrush.setColor(savedColor);
    }
    public void draw (java.awt.Graphics2D aBrush) {
	java.awt.Color savedColor = aBrush.getColor();
	aBrush.setColor(_borderColor);
	java.awt.Stroke savedStroke = aBrush.getStroke();
	aBrush.setStroke(new java.awt.BasicStroke(STROKE_WIDTH));
	aBrush.draw(this);
	aBrush.setStroke(savedStroke);
	aBrush.setColor(savedColor);
    }
}