196 lines
5.0 KiB
C
196 lines
5.0 KiB
C
/**
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* @file lv_slider.h
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*
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*/
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#ifndef LV_SLIDER_H
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#define LV_SLIDER_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 "../lv_conf_internal.h"
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#if LV_USE_SLIDER != 0
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/*Testing of dependencies*/
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#if LV_USE_BAR == 0
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#error "lv_slider: lv_bar is required. Enable it in lv_conf.h (LV_USE_BAR 1)"
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#endif
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#include "../core/lv_obj.h"
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#include "lv_bar.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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enum {
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LV_SLIDER_MODE_NORMAL = LV_BAR_MODE_NORMAL,
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LV_SLIDER_MODE_SYMMETRICAL = LV_BAR_MODE_SYMMETRICAL,
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LV_SLIDER_MODE_RANGE = LV_BAR_MODE_RANGE
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};
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typedef uint8_t lv_slider_mode_t;
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typedef struct {
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lv_bar_t bar; /*Add the ancestor's type first*/
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lv_area_t left_knob_area;
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lv_area_t right_knob_area;
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int32_t * value_to_set; /*Which bar value to set*/
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uint8_t dragging : 1; /*1: the slider is being dragged*/
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uint8_t left_knob_focus : 1; /*1: with encoder now the right knob can be adjusted*/
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} lv_slider_t;
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extern const lv_obj_class_t lv_slider_class;
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/**
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* `type` field in `lv_obj_draw_part_dsc_t` if `class_p = lv_slider_class`
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* Used in `LV_EVENT_DRAW_PART_BEGIN` and `LV_EVENT_DRAW_PART_END`
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*/
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typedef enum {
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LV_SLIDER_DRAW_PART_KNOB, /**< The main (right) knob's rectangle*/
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LV_SLIDER_DRAW_PART_KNOB_LEFT, /**< The left knob's rectangle*/
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} lv_slider_draw_part_type_t;
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/**********************
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* GLOBAL PROTOTYPES
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**********************/
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/**
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* Create a slider object
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* @param parent pointer to an object, it will be the parent of the new slider.
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* @return pointer to the created slider
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*/
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lv_obj_t * lv_slider_create(lv_obj_t * parent);
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/*=====================
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* Setter functions
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*====================*/
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/**
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* Set a new value on the slider
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* @param obj pointer to a slider object
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* @param value the new value
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* @param anim LV_ANIM_ON: set the value with an animation; LV_ANIM_OFF: change the value immediately
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*/
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static inline void lv_slider_set_value(lv_obj_t * obj, int32_t value, lv_anim_enable_t anim)
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{
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lv_bar_set_value(obj, value, anim);
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}
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/**
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* Set a new value for the left knob of a slider
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* @param obj pointer to a slider object
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* @param value new value
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* @param anim LV_ANIM_ON: set the value with an animation; LV_ANIM_OFF: change the value immediately
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*/
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static inline void lv_slider_set_left_value(lv_obj_t * obj, int32_t value, lv_anim_enable_t anim)
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{
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lv_bar_set_start_value(obj, value, anim);
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}
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/**
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* Set minimum and the maximum values of a bar
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* @param obj pointer to the slider object
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* @param min minimum value
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* @param max maximum value
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*/
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static inline void lv_slider_set_range(lv_obj_t * obj, int32_t min, int32_t max)
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{
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lv_bar_set_range(obj, min, max);
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}
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/**
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* Set the mode of slider.
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* @param obj pointer to a slider object
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* @param mode the mode of the slider. See ::lv_slider_mode_t
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*/
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static inline void lv_slider_set_mode(lv_obj_t * obj, lv_slider_mode_t mode)
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{
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lv_bar_set_mode(obj, (lv_bar_mode_t)mode);
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}
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/*=====================
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* Getter functions
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*====================*/
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/**
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* Get the value of the main knob of a slider
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* @param obj pointer to a slider object
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* @return the value of the main knob of the slider
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*/
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static inline int32_t lv_slider_get_value(const lv_obj_t * obj)
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{
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return lv_bar_get_value(obj);
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}
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/**
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* Get the value of the left knob of a slider
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* @param obj pointer to a slider object
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* @return the value of the left knob of the slider
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*/
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static inline int32_t lv_slider_get_left_value(const lv_obj_t * obj)
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{
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return lv_bar_get_start_value(obj);
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}
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/**
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* Get the minimum value of a slider
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* @param obj pointer to a slider object
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* @return the minimum value of the slider
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*/
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static inline int32_t lv_slider_get_min_value(const lv_obj_t * obj)
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{
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return lv_bar_get_min_value(obj);
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}
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/**
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* Get the maximum value of a slider
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* @param obj pointer to a slider object
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* @return the maximum value of the slider
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*/
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static inline int32_t lv_slider_get_max_value(const lv_obj_t * obj)
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{
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return lv_bar_get_max_value(obj);
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}
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/**
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* Give the slider is being dragged or not
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* @param obj pointer to a slider object
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* @return true: drag in progress false: not dragged
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*/
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bool lv_slider_is_dragged(const lv_obj_t * obj);
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/**
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* Get the mode of the slider.
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* @param obj pointer to a bar object
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* @return see ::lv_slider_mode_t
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*/
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static inline lv_slider_mode_t lv_slider_get_mode(lv_obj_t * slider)
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{
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lv_bar_mode_t mode = lv_bar_get_mode(slider);
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if(mode == LV_BAR_MODE_SYMMETRICAL) return LV_SLIDER_MODE_SYMMETRICAL;
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else if(mode == LV_BAR_MODE_RANGE) return LV_SLIDER_MODE_RANGE;
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else return LV_SLIDER_MODE_NORMAL;
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}
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/**********************
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* MACROS
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**********************/
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#endif /*LV_USE_SLIDER*/
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#ifdef __cplusplus
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} /*extern "C"*/
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#endif
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#endif /*LV_SLIDER_H*/
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