#include <u.h>#include <libc.h>#include <draw.h>#include <event.h> Image	*hrhand;Image	*minhand;Image	*dots;Image	*back;int	sflag; Pointcirclept(Point c, int r, int degrees){	double rad; 	rad = (double) degrees * PI/180.0;	c.x += cos(rad)*r;	c.y -= sin(rad)*r;	return c;} Pointclockpoint(Point c, int r, double pt){	double rad; 	rad = PI/2.0 - (double)pt*2.0*PI/60.0;	c.x += cos(rad)*r;	c.y -= sin(rad)*r;	return c;} char *ntab[] = {	0,	"sqrt 9 - {sqrt {9}!} over {sqrt 9}")	"sqrt 9 - 9 over 9")	"sqrt {9}! - 9 over {sqrt 9}")	"sqrt 9 + 9 over 9")	"sqrt {9}! - 9 over 9")	"9-{9 over {sqrt 9}}")	"sqrt {9}! + 9 over 9")	"9 - 9 over 9")	"sqrt {9}! + 9 over {sqrt 9}")	"sqrt 9 + 9 over 9")	"9 +  {sqrt {9}!} over {sqrt 9}")	"9+{9 over {sqrt 9}}"}; voidredraw(Image *screen){	Rectangle r;	Point c;	Tm *tm;	int rad, i;	static ulong t;	double pthr; 	tm = localtime(time(0)); 	pthr = 5*(tm->hour + (tm->min*60+tm->sec)/3600);	r = screen->r;	c = divpt(addpt(r.min, r.max), 2);	c.x += font->height;	rad = Dx(r) < Dy(r) ? Dx(r) : Dy(r);	rad /= 2;	rad -= 8+2*font->height; 	draw(screen, screen->r, back, nil, ZP);	for(i=0; i<12; i++){		char buf[10];		snprint(buf, sizeof buf, "%d", i);		string(screen, clockpoint(c, rad, i*60/12.0), display->black, ZP, font, buf);}//		fillellipse(screen, circlept(c, rad, i*(360/12)), 2, 2, dots, ZP); 	if(sflag)		line(screen, c, clockpoint(c, rad*7/8, tm->sec), 0, 0, 0, minhand, ZP);	line(screen, c, clockpoint(c, (rad*3)/4, tm->min), 0, Endarrow, 1, minhand, ZP);	line(screen, c, clockpoint(c, rad/2, pthr), 0, Endarrow, 1, hrhand, ZP); 	flushimage(display, 1);} voideresized(int new){	if(new && getwindow(display, Refnone) < 0)		fprint(2,"can't reattach to window");	redraw(screen);} voidusage(void){	fprint(2, "usage: 9clock [-s]\n");} voidmain(int argc, char **argv){	Event e;	Menu menu;	char *mstr[] = {"exit", 0};	int timer; 	ARGBEGIN{	case 's':		sflag ^= 1;		break;	default:		usage();	}ARGEND 	if(initdraw(0, 0, "9clock") < 0)		sysfatal("initdraw: %r");	back = allocimagemix(display, DPalebluegreen, DWhite); 	hrhand = allocimage(display, Rect(0,0,1,1), CMAP8, 1, DDarkblue);	minhand = allocimage(display, Rect(0,0,1,1), CMAP8, 1, DPaleblue);	dots = allocimage(display, Rect(0,0,1,1), CMAP8, 1, DBlue);	redraw(screen); 	einit(Emouse|Ekeyboard);	if(sflag)		timer = etimer(0, 1000);	else		timer = etimer(0, 30000); 	menu.item = mstr;	menu.lasthit = 0;	for(;;) {		switch(eread(Emouse|Ekeyboard|timer, &e)){		case Ekeyboard:			if(e.kbdc==0x7F || e.kbdc=='q')				exits("");			break;		case Emouse:			if(e.mouse.buttons & 4)			if(emenuhit(3, &e.mouse, &menu))				exits("");			break;		default:			redraw(screen);			break;		}	}	}