fixes and improves tab navigation mechanism.

src/ui/widget/group.h

@@ -13,10 +13,12 @@ typedef struct {
   uint32_t id;
   void *element;
   enum w_type type;
+  uint32_t is_default : 1;
 } group_el_t;
 
 typedef struct {
   enum w_type type;
+  uint32_t is_default : 1;
   char label[DIALOGUE_TITLE];
   uint32_t length;
 } group_el_init_t;
@@ -24,20 +26,23 @@ typedef struct {
 typedef struct {
   widget_t w;
   group_el_t *elements;
-  uint32_t active_id; // TODO: needs to be removed
   enum g_direction direction;
   uint32_t count;
   uint32_t first_id, last_id;
 } group_t;
 
-typedef struct {
-  int32_t value;
-  uint32_t active_id;
-} group_resp_t;
+#define FIND_ACTIVE_ELEMENT(g, active_id, element_ptr, element_idx)                    \
+  for (int i = 0; i < g->count; i++) {                                         \
+    if (g->elements[i].id == active_id) {                                \
+      element_ptr = &(g->elements[i]);                                         \
+      element_idx = i;                                                         \
+      break;                                                                   \
+    }                                                                          \
+  }
 
 group_t *init_group(WINDOW **win, widget_t *w_parent, group_el_init_t *children,
                     enum g_direction dir);
-void draw_group(WINDOW *win, group_t *group, int32_t active_id);
+void draw_group(WINDOW *win, group_t *group, int32_t active_id, widget_t *dialog_w);
 void destroy_group(group_t *group);
 void group_default_callback(callback_args_t *args);