93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/**
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* @file lv_obj_class.h
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*
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*/
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#ifndef LV_OBJ_CLASS_H
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#define LV_OBJ_CLASS_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*********************
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* INCLUDES
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*********************/
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#include <stdint.h>
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#include <stdbool.h>
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/*********************
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* DEFINES
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*********************/
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/**********************
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* TYPEDEFS
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**********************/
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struct _lv_obj_t;
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struct _lv_obj_class_t;
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struct _lv_event_t;
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typedef enum {
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LV_OBJ_CLASS_EDITABLE_INHERIT, /**< Check the base class. Must have 0 value to let zero initialized class inherit*/
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LV_OBJ_CLASS_EDITABLE_TRUE,
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LV_OBJ_CLASS_EDITABLE_FALSE,
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}lv_obj_class_editable_t;
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typedef enum {
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LV_OBJ_CLASS_GROUP_DEF_INHERIT, /**< Check the base class. Must have 0 value to let zero initialized class inherit*/
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LV_OBJ_CLASS_GROUP_DEF_TRUE,
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LV_OBJ_CLASS_GROUP_DEF_FALSE,
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}lv_obj_class_group_def_t;
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typedef void (*lv_obj_class_event_cb_t)(struct _lv_obj_class_t * class_p, struct _lv_event_t * e);
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/**
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* Describe the common methods of every object.
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* Similar to a C++ class.
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*/
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typedef struct _lv_obj_class_t {
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const struct _lv_obj_class_t * base_class;
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void (*constructor_cb)(const struct _lv_obj_class_t * class_p, struct _lv_obj_t * obj);
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void (*destructor_cb)(const struct _lv_obj_class_t * class_p, struct _lv_obj_t * obj);
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#if LV_USE_USER_DATA
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void * user_data;
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#endif
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void (*event_cb)(const struct _lv_obj_class_t * class_p, struct _lv_event_t * e); /**< Widget type specific event function*/
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lv_coord_t width_def;
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lv_coord_t height_def;
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uint32_t editable : 2; /**< Value from ::lv_obj_class_editable_t*/
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uint32_t group_def : 2; /**< Value from ::lv_obj_class_group_def_t*/
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uint32_t instance_size : 16;
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}lv_obj_class_t;
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/**********************
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* GLOBAL PROTOTYPES
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**********************/
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/**
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* Create an object form a class descriptor
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* @param class_p pointer to a class
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* @param parent pointer to an object where the new object should be created
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* @return pointer to the created object
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*/
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struct _lv_obj_t * lv_obj_create_from_class(const struct _lv_obj_class_t * class_p, struct _lv_obj_t * parent);
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void _lv_obj_destructor(struct _lv_obj_t * obj);
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bool lv_obj_is_editable(struct _lv_obj_t * obj);
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bool lv_obj_is_group_def(struct _lv_obj_t * obj);
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/**********************
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* MACROS
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**********************/
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#ifdef __cplusplus
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} /*extern "C"*/
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#endif
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#endif /*LV_OBJ_CLASS_H*/
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