import java.awt.*;

public class FlashingText extends Sprite {
	// This Sprite renders text between two alternating colors.
	// The period of the Sprite determines how many frames
	// pass before changing the color of the text.
	
	private String text;
	private int x, y;
	private Color evenColor, oddColor;
	private int period;
	private Font font;

	boolean isEvenColor;
	
	public String name () {
		return "FlashingText";
	}
	
	public String toString () {
		return name() + "[text="+this.text
									+ "; position=("+this.x+","+this.y+")"
									+ "; colors=("+this.evenColor+","+this.oddColor+")"
									+ "; period="+this.period
									+ "; font="+this.font
									+ "]";
	}
	
	public String getState () {
		return name() + "[color=" + getColor() + "]";
	}
	
	// constructors
	public FlashingText (String text, int x, int y) {
		this.text = text;
		this.x = x;
		this.y = y;
		this.evenColor = Color.black;
		this.oddColor = Color.white;
		this.period = 5;
		this.font = new Font("Helvetica",Font.BOLD,36);
		this.resetState();
	}
	
	public FlashingText (String text, int x, int y, Color c1, Color c2, int period) {
		this(text,x,y);
		this.evenColor = c1;
		this.oddColor = c2;
		this.period = period;
	}

	public void setFont (Font f) {
		this.font = f;
	}
	
	
	// required Sprite methods
	protected void resetState () {
		this.isEvenColor = true;
	}
	
	protected void drawState (Graphics g) {
		g.setColor(getColor());
		g.setFont(this.font);
		g.drawString(text,x,y);
	}
	
	protected void updateState () {
		if ((getCurrentStateNumber()%period) == 0) {
			this.isEvenColor = !this.isEvenColor;
		}
	}
	
	private Color getColor () {
		if (isEvenColor) {
			return this.evenColor;
		} else {
			return this.oddColor;
		}
	}

}