// (c) 1998 Ekkehard Kraemer (ekraemer@pluto.camelot.de)

import java.awt.*;

/**
 * Sorry, not documented yet.
 * <p>
 * <a href="Paddle.txt">Source</a>
 */
class Paddle extends Rectangle
{
    Paddle(BojngInterface bojng)
    {
	this.bojng=bojng;
	reset();
	x=bojng._imgwidth()/2-width/2;
    }

    void reset()
    {
	boolean s=isDrawn;
	if (s) draw(false);
	curSize=1;
	changeSize(0);
	if (s) draw(true);
    }

    void changeSize(int diff)
    {
	boolean s=isDrawn;
	if (s) draw(false);
	curSize+=diff;
	if (curSize<0) curSize=0;
	if (curSize>=Images.paddle.length) curSize=Images.paddle.length-1;
	width=Images.paddle[curSize].getWidth(null);
	height=Images.paddle[curSize].getHeight(null);
	y=bojng._imgheight()-height-2;	
	if (s) draw(true);
    }

    void moveTo(int x)
    {
	boolean s=isDrawn;
	if (s) draw(false);
	this.x=x;
	if (s) draw(true);
    }

    void draw(boolean visible)
    {
	if (!visible && isDrawn) 
	    bojng.drawBackground(x,y,width,height);
	if (visible && !isDrawn)
	    bojng.drawImage(Images.paddle[curSize],x,y);
	isDrawn=visible;
	//bojng._update().add(this);	
    }    

    void initBall()
    {
	ballStartAngle=0;
	ballStartX=width/2;
    }

    double getBallAngle()
    {
	double a=ballStartAngle+PI.halbe;
	if (a>Math.PI) a=PI.zwei-a;
	if (a<PI.zehntel) a=PI.zehntel;
	if (a>PI.neunzehntel) a=PI.neunzehntel;

	ballStartAngle+=PI.zwanzigstel;
	while (ballStartAngle>=PI.zwei) 
	    ballStartAngle-=PI.zwei;
	ballStartX=width/2+(int)(-Math.sin(ballStartAngle)*width/2);

	return a;
    }

    BojngInterface bojng;
    double ballStartAngle;
    int ballStartX;
    int curSize=1;
    boolean isDrawn=false;
}