lv_obj_private.h

API reference for lv_obj_private.h

Summary

Functions

Allocate special data for an object if not allocated yet.

lv_obj_spec_attr_t * lv_obj_allocate_spec_attr(lv_obj_t *obj)

Name	Type	Description
`obj`	`lv_obj_t *`	pointer to an object

Returns: lv_obj_spec_attr_t * — the spec_attr created or NULL if something went wrong

lv_result_t lv_obj_add_child(lv_obj_t *parent, lv_obj_t *child)

Name	Type
`parent`	`lv_obj_t *`
`child`	`lv_obj_t *`

void lv_obj_remove_child(lv_obj_t *parent, lv_obj_t *child)

Name	Type
`parent`	`lv_obj_t *`
`child`	`lv_obj_t *`

struct

Special, rarely used attributes. They are allocated automatically if any elements is set.

Member	Type	Description
`children`	`lv_obj_t **`	Store the pointer of the children in an array.
`group_p`	`lv_group_t *`
`event_list`	`lv_event_list_t`
`name`	`const char *`	Pointer to the name
`scroll`	`lv_point_t`	The current X/Y scroll offset
`ext_click_pad`	`int32_t`	Extra click padding in all direction
`ext_draw_size`	`int32_t`	EXTend the size in every direction for drawing.
`child_cnt`	`uint16_t`	Number of children
`scrollbar_mode`	`uint16_t`	How to display scrollbars, see `lv_scrollbar_mode_t`
`scroll_snap_x`	`uint16_t`	Where to align the snappable children horizontally, see `lv_scroll_snap_t`
`scroll_snap_y`	`uint16_t`	Where to align the snappable children vertically
`scroll_dir`	`uint16_t`	The allowed scroll direction(s), see `lv_dir_t`
`layer_type`	`uint16_t`	Cache the layer type here. Element of lv_intermediate_layer_type_t
`name_static`	`uint16_t`	1: `name` was not dynamically allocated

struct

Member	Type	Description
`ext_data`	`lv_ext_data_t`
`class_p`	`const lv_obj_class_t *`
`parent`	`lv_obj_t *`
`spec_attr`	`lv_obj_spec_attr_t *`
`styles`	`lv_obj_style_t *`
`user_data`	`void *`
`id`	`void *`
`coords`	`lv_area_t`
`flags`	`lv_obj_flag_t`
`state`	`uint16_t`
`layout_inv`	`uint16_t`
`readjust_scroll_after_layout`	`uint16_t`
`scr_layout_inv`	`uint16_t`
`skip_trans`	`uint16_t`
`style_cnt`	`uint16_t`
`h_layout`	`uint16_t`
`w_layout`	`uint16_t`
`h_ignore_size`	`uint16_t`
`w_ignore_size`	`uint16_t`
`is_deleting`	`uint16_t`
`radio_button`	`uint16_t`	Allow only one RADIO_BUTTON sibling to be checked
`rendered`	`uint16_t`	The widget is rendered at least once already. It's used to skip initial animations and transitions.

Used by 1 function

typedef struct _lv_obj_spec_attr_t lv_obj_spec_attr_t

Special, rarely used attributes. They are allocated automatically if any elements is set.

Indirect dependencies