/* draw random rectangles in the current window
* sort of like the xscreensaver we all know
* -- andrey
*/

/* based on russ cox' click.c */


#include <u.h>
#include <libc.h>
#include <draw.h>
#include <thread.h>
#include <event.h>

int minx, miny, maxx, maxy;

void
eresized(int new)
{
	Rectangle r;
	if(new && getwindow(display, Refnone) < 0)
		fprint(2,"can't reattach to window");
	r = screen->r;
	minx = r.min.x;
	miny = r.min.y;
	maxx = r.max.x;
	maxy = r.max.y;
	draw(screen, screen->r, display->white, nil, ZP);
}

void
main(int argc, char **argv)
{
	Mouse m;
	Image *img;
	Rectangle r;
	int i;
	int slp = 10;

	char *items[] = { "slower", "faster", "exit", nil };


	Menu menu;

	/* setup menus */
	menu.item = items;
	menu.gen = nil;

	srand(0);

	initdraw(0,0,"whoopty doo");
	eresized(0);
	einit(Emouse);


	for(;;){
		if(ecanmouse())	{
			m = emouse();
			if(m.buttons & 4) {
				switch(emenuhit(3, &m, &menu)) {
					case 0: 	slp += 10; break;
					case 1: 	if(slp) 
									slp -= 10;
								else 
									slp = 0; 
								break;
					case 2: 	exits("user abort");
					default: 	fprint(2, "impossible button\n");
				}
			}
		}
		
		/* draw a rectangle somewhere in the window */
		/* make sure rectangle does not overflow window */
		r.min.x = minx + nrand(maxx - minx);
		r.min.y = miny + nrand(maxy - miny);
		r.max.x = r.min.x + nrand(maxx - r.min.x);
		r.max.y = r.min.y + nrand(maxy - r.min.y);

		/* get a random color and random alpha for drawing */
		/*** probably not the best way of doing it ***/
		img = allocimagemix(display,nrand(256)<<24 | nrand(256) << 16 | nrand(256) <<8 | (256 - nrand(256)),nrand(256)<<24 | nrand(256) << 16 | nrand(256) <<8 | (256 - nrand(256)));

	 	draw(screen, r, img, nil, ZP);
		flushimage(display, 1);
		freeimage(img);
		/* slow down the drawing somehow */
		sleep(slp);
	}
}