tclock.c - plan9port - [fork] Plan 9 from user space
  HTML git clone git://src.adamsgaard.dk/plan9port
   DIR Log
   DIR Files
   DIR Refs
   DIR README
   DIR LICENSE
       ---
       tclock.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 }