// Computergraphik I
// Prof. Dr. Juergen Doellner
// Sommersemester 2001
// 
// Rahmenprogramm fuer Aufgabenzettel 4

// Stephan Brumme, 702544
// last changes: May 19, 2001

#ifndef CG_BRESENHAM_H
#define CG_BRESENHAM_H

#include "cgapplication.h"
#include "cgraster.h"

class CGEllipse : public CGApplication {
public:
    CGEllipse(int width, int height);

    virtual void onInit();
    virtual void onDraw();
    virtual void onSize(unsigned int newWidth,unsigned  int newHeight);

    virtual void onButton(MouseButton button, MouseButtonEvent event, int x, int y);
    virtual void onMove(MouseButton button, int x, int y);

private:
    // zeichenen der Ellipse in das Raster raster_
    void drawEllipse(int x1, int y1, int x2, int y2);
    void drawEllipsePoints(int midx, int midy, int x, int y);

    // interne Raster-Klasse
    CGRaster raster_;

    // Fenstergroesse speichern
    int winWidth_;
    int winHeight_;

    // linke untere und rechte obere Ecke des Rechteckes, das die Ellipse beschreibt
    int xBegin_;
    int yBegin_;
    int xEnd_;
    int yEnd_;
	bool First_;
};

#endif // CG_BRESENHAM_H