/*
 *  Smiley with a Button
 *  --------------------
 *  This program draws a smiley inside a window, with a
 *  quit button in the top-left of the window.
 */

#include <graphapp.h>

void draw_smile(drawing d, rect r)
{
	rect r1, r2;
	point p;

	r1 = insetr(r, 10);   /* inset from edge */

	setcolour(LightBlue); /* blue face */
	fillellipse(r1);      /* draw face */

	setcolour(Red);       /* red lips */
	setlinewidth(2);      /* thicker lips */
	r2 = insetr(r1, 30);  /* inset from face */
	drawarc(r2, 270-60, 270+60); /* smile arc */

	setcolour(Brown);     /* brown eyes */
	p.x = r1.x + r1.width  * 1/2;
	p.y = r1.y + r1.height * 1/4;

	r2 = rect(p.x - 30, p.y, 20,20);
	fillellipse(r2);      /* draw left eye */

	r2 = rect(p.x + 10, p.y, 20,20);
	fillellipse(r2);      /* draw right eye */
}

void quit(button b)
{
	exitapp();
}

void resize_smile(window w, rect r)
{
	/* retrieve remembered drawing */
	drawing d = (drawing) getdata(w);
	resize(d, rect(0,25,r.width,r.height-25));
}

void main(void)
{
	window w;
	drawing d;
	button b;

	w = newwindow("Smile!", rect(50,50,120,145),
			StandardWindow);
	b = newbutton("Quit", rect(0,0,80,25), quit);
	d = newdrawing(rect(0,25,120,120), draw_smile);
	setdata(w, d);  /* store drawing pointer */
	setresize(w, resize_smile);
	show(w);
	mainloop();
}