ref: 457ba087b13a881b013940f6e54c09566ec10ed1
dir: /sys/src/cmd/clock.c/
#include <u.h> #include <libc.h> #include <draw.h> #include <event.h> Image *hrhand, *minhand; Image *dots, *back; Point circlept(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; } void redraw(Image *screen) { static int tm, ntm; static Rectangle r; static Point c; static int rad; int i; int anghr, angmin; static Tm ntms; ntm = time(0); if(ntm == tm && eqrect(screen->r, r)) return; ntms = *localtime(ntm); anghr = 90-(ntms.hour*5 + ntms.min/12)*6; angmin = 90-ntms.min*6; tm = ntm; r = screen->r; c = divpt(addpt(r.min, r.max), 2); rad = Dx(r) < Dy(r) ? Dx(r) : Dy(r); rad /= 2; rad -= 8; draw(screen, screen->r, back, nil, ZP); for(i=0; i<12; i++) fillellipse(screen, circlept(c, rad, i*(360/12)), 2, 2, dots, ZP); line(screen, c, circlept(c, (rad*3)/4, angmin), 0, 0, 1, minhand, ZP); line(screen, c, circlept(c, rad/2, anghr), 0, 0, 1, hrhand, ZP); flushimage(display, 1); } void eresized(int new) { if(new && getwindow(display, Refnone) < 0) fprint(2,"can't reattach to window"); redraw(screen); } void main(int, char**) { Event e; Mouse m; Menu menu; char *mstr[] = {"exit", 0}; int key, timer; int t; if (initdraw(0, 0, "clock") < 0) sysfatal("initdraw failed"); 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); t = (30*1000); timer = etimer(0, t); menu.item = mstr; menu.lasthit = 0; for(;;) { key = event(&e); if(key == Emouse) { m = e.mouse; if(m.buttons & 4) { if(emenuhit(3, &m, &menu) == 0) exits(0); } } else if(key == timer) { redraw(screen); } } }