clock.c (1910B)
1 #include <u.h> 2 #include <libc.h> 3 #include <draw.h> 4 #include <event.h> 5 6 Image *hrhand, *minhand; 7 Image *dots, *back; 8 9 Point 10 circlept(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 19 void 20 redraw(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 54 void 55 eresized(int new) 56 { 57 if(new && getwindow(display, Refnone) < 0) 58 fprint(2,"can't reattach to window"); 59 redraw(screen); 60 } 61 62 void 63 main(int argc, char **argv) 64 { 65 Event e; 66 Mouse m; 67 Menu menu; 68 char *mstr[] = {"exit", 0}; 69 int key, timer; 70 int t; 71 72 USED(argc); 73 USED(argv); 74 75 if (initdraw(0, 0, "clock") < 0) 76 sysfatal("initdraw failed"); 77 back = allocimagemix(display, DPalebluegreen, DWhite); 78 79 hrhand = allocimage(display, Rect(0,0,1,1), CMAP8, 1, DDarkblue); 80 minhand = allocimage(display, Rect(0,0,1,1), CMAP8, 1, DPaleblue); 81 dots = allocimage(display, Rect(0,0,1,1), CMAP8, 1, DBlue); 82 redraw(screen); 83 84 einit(Emouse); 85 t = (30*1000); 86 timer = etimer(0, t); 87 88 menu.item = mstr; 89 menu.lasthit = 0; 90 for(;;) { 91 key = event(&e); 92 if(key == Emouse) { 93 m = e.mouse; 94 if(m.buttons & 4) { 95 if(emenuhit(3, &m, &menu) == 0) 96 exits(0); 97 } 98 } else if(key == timer) { 99 redraw(screen); 100 } 101 } 102 }