#include <windows.h>
#ifndef WIN32 //if using windows then do windows specific stuff.
#define WIN32_LEAN_AND_MEAN //remove MFC overhead from windows.h which can cause slowness
#define WIN32_EXTRA_LEAN

#include <windows.h>
#endif
#include <stdio.h>
#include <GL/gl.h>
#include <GL/glut.h>
#include <GL/glu.h>
#include <conio.h>//needed for getch
#define W 800
#define H 600



class Botaum
{
    public:
    float y1;
    float y2;
    float x1;
    float x2;
    int meuStatus;
    char letra;
    void draw();
    private:
};

void Botaum::draw()
{

    //glRectf(-0.9f,0.9f, -0.8f, 0.8f);
    glColor3f(1.0f, 0.0f, 0.0f);
    if(meuStatus == 1)
    {
        glColor3f(1, 0, 0);
        glRasterPos3f(-0.1,0.0f,0.0f);
        glutBitmapCharacter(GLUT_BITMAP_HELVETICA_18, letra);
        glutSwapBuffers();
        glColor3f(0.0f, 1.0f, 0.0f);
    }
    //glRectf(x1,y1, x2, y2);
    glRectf(0.5, 0, 0.6, 0.1);
    glutSwapBuffers();
}

Botaum b[4];


void MyMouse(int button, int state, int x, int y)
{

    if(button == GLUT_LEFT_BUTTON)
    {
        float mx = ((((float)x * -2.0) / W)+1.0)*-1.0;
        float my = ((((float)y * -2.0) / H)-1.0)*-1.0;
        printf("y: %d\n",y/2);
        //printf(" Meu : %.2f , %.2f    -   %.2f~%.2f , %.2f~%.2f\n",mx,my,b[0].x1,b[0].x2,b[0].y1,b[0].y2);
        for(int i = 0; i < 4; i ++)
        {


            if((mx > b[i].x1 && mx < b[i].x2)&&(my > b[i].y1 && my < b[i].y2))
            {


                if(state == GLUT_DOWN)
                {
                    b[i].meuStatus = 1;
                    printf("\a");
                }
                else if(state == GLUT_UP)
                {
                     b[i].meuStatus = 0;
                }
            }

        }
    }

    glutPostRedisplay();
}


void display()
{
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
int i;
for( i = 0; i < 4; i ++ )
{
    b[i].draw();
}
   glutSwapBuffers();
}


void setup()
{
    int i;
    //b[0].x1 = 0.0;

    for( i = 0; i < 4; i ++ )
    {
        //b[i].x1 = -0.9 + (i * 0.20);
        b[i].y1 =  0.9;
        //b[i].x2 = -0.8 + (i * 0.20);
        b[i].y2 =  0.8;
        b[i].meuStatus = 0;
    }
}


int main(int argc, char *argv[])
{
    for(int i = 0; i < 4; i++)
    {
        printf("Digite a letra do botao %d: ",i);
        scanf("%c",&b[i].letra);
        fflush(stdin);
    }
   glutInit(&argc, argv);
   glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
   glutInitWindowSize(W,H);
   glutCreateWindow("Hello World");
   setup();
   glutDisplayFunc(display);
   glutMouseFunc(MyMouse);

   glutMainLoop();



    getch();//pause here to see results or lack there of
   return 0;

}