#include <GL/glut.h>

GLsizei winWidth = 640, winHeight = 480;

float sqx = 200.0;
float sqy = 50.0;
float sqwid = 100;
bool littleSquare = false;

void displayFcn (void)
{
    glClear (GL_COLOR_BUFFER_BIT);
	glColor3f (1.0, 1.0, 0.0);
	glRectf (sqx, sqy, sqx+sqwid, sqy+sqwid); 

	if (littleSquare) {
		glColor3f(1.0, 1.0, 1.0);
		glRectf (sqx, sqy, sqx+sqwid, sqy+sqwid); 
	}

	glutSwapBuffers ( ); 
}

void init(void)
{
	glClearColor (0.0, 0.0, 1.0, 0.0);

	glMatrixMode (GL_PROJECTION);
	gluOrtho2D (0.0, winWidth, winHeight, 0.0);
	glMatrixMode (GL_MODELVIEW);	
}
void moveRect(void)
{

}
void timer(int id){
	littleSquare = !littleSquare;
	glutTimerFunc(1000, timer, 1);
	glutPostRedisplay();
}

bool insideRect(int x, int y) {
	return 1;

}

void mouseButtons(int button, int state, int x, int y) {
	if (button == GLUT_LEFT_BUTTON && state == GLUT_DOWN) {
        sqx = x + 20;
		sqy = y + 20;
	}
	glutPostRedisplay();
}

void mouseDrag(int x, int y) {

}

void keyboard(unsigned char key, int x, int y) {
	if (key == '2') {
		sqwid = sqwid * 2;
	}

}

void main (int argc, char** argv)
{
	glutInit (&argc, argv);
	glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
	glutInitWindowPosition (50, 100);
	glutInitWindowSize (winWidth, winHeight);

	glutCreateWindow ("Interactive Rectangle Program");

	init();
	glutDisplayFunc (displayFcn);
	glutMouseFunc (mouseButtons);
	glutKeyboardFunc (keyboard);
	glutMotionFunc (mouseDrag); 
	glutIdleFunc(moveRect); 
	glutTimerFunc(1000, timer, 1);

	glutMainLoop ( );
}