1#include <u.h>
 2#include <libc.h>
 3#include <draw.h>
 4#include <event.h>
 5
 6Image *hrhand, *minhand;
 7Image *dots, *back;
 8
 9Point
10circlept(Point c, int r, int degrees)
11{
12	double rad;
13	rad = (double) degrees * PI/180.0;
14	c.x += cos(rad)*r;
15	c.y -= sin(rad)*r;
16	return c;
17}
18
19void
20redraw(Image *screen)
21{
22	static int tm, ntm;
23	static Rectangle r;
24	static Point c;
25	static int rad;
26	int i;
27	int anghr, angmin;
28	static Tm ntms;
29
30	ntm = time(0);
31	if(ntm == tm && eqrect(screen->r, r))
32		return;
33
34	ntms = *localtime(ntm);
35	anghr = 90-(ntms.hour*5 + ntms.min/12)*6;
36	angmin = 90-ntms.min*6;
37	tm = ntm;
38	r = screen->r;
39	c = divpt(addpt(r.min, r.max), 2);
40	rad = Dx(r) < Dy(r) ? Dx(r) : Dy(r);
41	rad /= 2;
42	rad -= 8;
43
44	draw(screen, screen->r, back, nil, ZP);
45	for(i=0; i<12; i++)
46		fillellipse(screen, circlept(c, rad, i*(360/12)), 2, 2, dots, ZP);
47
48	line(screen, c, circlept(c, (rad*3)/4, angmin), 0, 0, 1, minhand, ZP);
49	line(screen, c, circlept(c, rad/2, anghr), 0, 0, 1, hrhand, ZP);
50
51	flushimage(display, 1);
52}
53
54void
55eresized(int new)
56{
57	if(new && getwindow(display, Refnone) < 0)
58		fprint(2,"can't reattach to window");
59	redraw(screen);
60}
61
62void
63main(int, char**)
64{
65	Event e;
66	Mouse m;
67	Menu menu;
68	char *mstr[] = {"exit", 0};
69	int key, timer;
70	int t;
71
72	if (initdraw(0, 0, "clock") < 0)
73		sysfatal("initdraw failed");
74	back = allocimagemix(display, DPalebluegreen, DWhite);
75
76	hrhand = allocimage(display, Rect(0,0,1,1), CMAP8, 1, DDarkblue);
77	minhand = allocimage(display, Rect(0,0,1,1), CMAP8, 1, DPaleblue);
78	dots = allocimage(display, Rect(0,0,1,1), CMAP8, 1, DBlue);
79	redraw(screen);
80
81	einit(Emouse);
82	t = (30*1000);
83	timer = etimer(0, t);
84
85	menu.item = mstr;
86	menu.lasthit = 0;
87	for(;;) {
88		key = event(&e);
89		if(key == Emouse) {
90			m = e.mouse;
91			if(m.buttons & 4) {
92				if(emenuhit(3, &m, &menu) == 0)
93					exits(0);
94			}
95		} else if(key == timer) {
96			redraw(screen);
97		}
98	}	
99}