// initialize clock : y position, precision, ...
void init_clock();
void init_clock_panel(void *panel);
// initialize clock : y position, precision, ...
void init_clock();
void init_clock_panel(void *panel);
void draw_clock (void *obj, cairo_t *c);
void resize_clock (void *obj);
void draw_clock (void *obj, cairo_t *c);
void resize_clock (void *obj);