/*
 *  Lines2
 *  ------
 *  This is another version of the lines.c program. It draws some
 *  lines inside a call-back so they will not be erased by the
 *  window becoming obscured.
 *
 *  The setredraw function associates a redraw call-back with a
 *  window, before the window is made visible by calling show.
 */

#include <graphapp.h>

void draw_it(window w, rect r)
{
	point a = pt(10,10);
	point b = pt(10,40);
	point c = pt(50,40);

	drawline(a, b);
	drawline(b, c);
	drawline(c, a);
}

void main(void)
{
	window w;
	w = newwindow("Graphics", rect(20,20,100,80), StandardWindow);
	setredraw(w, draw_it);
	show(w);
	mainloop();
}