// each object can overwrite following function
void (*_draw_foreground)(void *obj, cairo_t *c);
- // calculate size. return '1' if size changed, '0' otherwise.
+ // update area's content and update size (width/heith).
+ // return '1' if size changed, '0' otherwise.
int (*_resize)(void *obj);
void (*_add_child)(void *obj);
int (*_remove_child)(void *obj);
// set 'redraw' on an area and childs
void set_redraw (Area *a);
+// hide/unhide area
+void hide(Area *a);
+void show(Area *a);
+
// draw pixmap
void draw (Area *a);
void draw_background (Area *a, cairo_t *c);