#include "..\glut.h"
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include "button.cpp"

/* Global object declarations */
bool tri_clicked = false;
int tri_color_seq_num = 0;

GLfloat tri_red[5] = { 1.0, 0.8, 0.5, 0.0, 0.0 };
GLfloat tri_green[5] = { 1.0, 0.2, 0.5, 1.0, 0.0 };
GLfloat tri_blue[5] = { 1.0, 0.0, 0.2, 0.3, 0.4 };

//global Button objects created with appropriate location and text
PushButton colorChangeButton(20, 150, 80, 30, "Change Color");
PushButton quitButton(20,50, 50, 30, "Quit", 1.0, 0.0, 0.0);

void myInit()
{
    glClearColor(0.6, 0.6, 0.2, 1.0);

    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluOrtho2D(0.0, 500.0, 0.0, 500.0);
    glMatrixMode(GL_MODELVIEW);
} // end of my_init()

void myDisplay()
{
    glClear(GL_COLOR_BUFFER_BIT);

    colorChangeButton.Draw();		// calls the draw
    quitButton.Draw();			// method for each
	                            // of the buttons
        
    glColor3f(tri_red[tri_color_seq_num], 
		      tri_green[tri_color_seq_num],
			  tri_blue[tri_color_seq_num]);

	glBegin(GL_POLYGON);	//gives the attributes of the triangle
        glVertex2i(100, 500);
        glVertex2i(500, 300);
        glVertex2i(400, 50);
    glEnd();
	
	glFlush();
} // end of myDisplay()

void myMouseCallback(int mouse_btn, int state, int x, int y)
{

    if (mouse_btn == GLUT_LEFT_BUTTON && state == GLUT_DOWN &&
        colorChangeButton.WasClicked(x, y)) {
            colorChangeButton.Depress();
    }

    if (mouse_btn == GLUT_LEFT_BUTTON && state == GLUT_UP &&
		colorChangeButton.WasClicked(x, y)) {
			                   // this means that the triangle
			 tri_clicked=true; // button was clicked last
             tri_color_seq_num ++;
			 if (tri_color_seq_num > 4) 
				 tri_color_seq_num = 0;
	    	 colorChangeButton.Draw();
			 myDisplay();
    }

    if (mouse_btn == GLUT_LEFT_BUTTON && state == GLUT_DOWN &&
        quitButton.WasClicked(x, y)) {
            quitButton.Depress();
    }

    if (mouse_btn == GLUT_LEFT_BUTTON && state == GLUT_UP &&
        quitButton.WasClicked(x, y)) {
            quitButton.Draw();
            exit(0);
    }
   
} // end of myMouseCallback()

void main(int argc, char **argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB );
    glutInitWindowSize(500, 500);
    glutInitWindowPosition(0, 0);
    glutCreateWindow("OpenGL PushButton Example");

    glutDisplayFunc(myDisplay);
    glutMouseFunc(myMouseCallback);

    myInit();
    glutMainLoop();
}