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feat(obj_tree) add lv_obj_tree_walk

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This commit is contained in:
Gabor Kiss-Vamosi 2021-04-08 13:58:48 +02:00
parent 20803031e8
commit 853dc0508f
2 changed files with 76 additions and 24 deletions
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24
src/core/lv_obj_tree.c
View File

@ -30,6 +30,7 @@
**********************/
static void lv_obj_del_async_cb(void * obj);
static void obj_del_core(lv_obj_t * obj);
static lv_obj_tree_walk_res_t walk_core(lv_obj_t * obj, lv_obj_tree_walk_cb_t cb, void * user_data);
/**********************
* STATIC VARIABLES
@ -311,6 +312,12 @@ uint32_t lv_obj_get_child_id(const lv_obj_t * obj)
return 0xFFFFFFFF; /*Shouldn't happen*/
}
void lv_obj_tree_walk(lv_obj_t * start_obj, lv_obj_tree_walk_cb_t cb, void * user_data)
{
walk_core(start_obj, cb, user_data);
}
/**********************
* STATIC FUNCTIONS
**********************/
@ -398,3 +405,20 @@ static void obj_del_core(lv_obj_t * obj)
/*Free the object itself*/
lv_mem_free(obj);
}
static lv_obj_tree_walk_res_t walk_core(lv_obj_t * obj, lv_obj_tree_walk_cb_t cb, void * user_data)
{
lv_obj_tree_walk_res_t res = cb(obj, user_data);
if(res == LV_OBJ_TREE_WALK_END) return LV_OBJ_TREE_WALK_END;
if(res != LV_OBJ_TREE_WALK_SKIP_CHILDREN) {
uint32_t i;
for(i = 0; i < lv_obj_get_child_cnt(obj); i++) {
res = walk_core(lv_obj_get_child(obj, i), cb, user_data);
if(res == LV_OBJ_TREE_WALK_END) return LV_OBJ_TREE_WALK_END;
}
}
return LV_OBJ_TREE_WALK_NEXT;
}

28
src/core/lv_obj_tree.h
View File

@ -28,12 +28,32 @@ extern "C" {
struct _lv_obj_t;
struct _lv_obj_class_t;
typedef enum {
LV_OBJ_TREE_WALK_NEXT,
LV_OBJ_TREE_WALK_SKIP_CHILDREN,
LV_OBJ_TREE_WALK_END,
} lv_obj_tree_walk_res_t;
typedef lv_obj_tree_walk_res_t (*lv_obj_tree_walk_cb_t)(struct _lv_obj_t *, void *);
/**********************
* GLOBAL PROTOTYPES
**********************/
/**
* Delete an object and all of it's children.
* Also remove the objects from their group and remove all animations (if any).
* Send `LV_EVENT_DELETED` to deleted objects.
* @param obj pointer to an object
*/
void lv_obj_del(struct _lv_obj_t * obj);
/**
* Delete all children of an object.
* Also remove the objects from their group and remove all animations (if any).
* Send `LV_EVENT_DELETED` to deleted objects.
* @param obj pointer to an object
*/
void lv_obj_clean(struct _lv_obj_t * obj);
/**
@ -123,6 +143,14 @@ uint32_t lv_obj_get_child_cnt(const struct _lv_obj_t * obj);
*/
uint32_t lv_obj_get_child_id(const struct _lv_obj_t * obj);
/**
* Iterate through all children of any object.
* @param start_obj start integrating from this object
* @param cb call this callback on the objects
* @param user_data pointer to any user related data (will be passed to `cb`)
*/
void lv_obj_tree_walk(struct _lv_obj_t * start_obj, lv_obj_tree_walk_cb_t cb, void * user_data);
/**********************
* MACROS
**********************/