472 lines
13 KiB
C
472 lines
13 KiB
C
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/**
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* @file lv_spinbox.c
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*
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*/
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/*********************
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* INCLUDES
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*********************/
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#include "lv_spinbox.h"
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#if USE_LV_SPINBOX != 0
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#include "../lv_themes/lv_theme.h"
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#include "../lv_misc/lv_math.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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/**********************
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* STATIC PROTOTYPES
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**********************/
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static lv_res_t lv_spinbox_signal(lv_obj_t * spinbox, lv_signal_t sign, void * param);
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static void lv_spinbox_updatevalue(lv_obj_t * spinbox);
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/**********************
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* STATIC VARIABLES
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**********************/
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static lv_signal_func_t ancestor_signal;
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static lv_design_func_t ancestor_design;
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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/**
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* Create a spinbox object
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* @param par pointer to an object, it will be the parent of the new spinbox
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* @param copy pointer to a spinbox object, if not NULL then the new object will be copied from it
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* @return pointer to the created spinbox
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*/
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lv_obj_t * lv_spinbox_create(lv_obj_t * par, const lv_obj_t * copy)
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{
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LV_LOG_TRACE("spinbox create started");
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/*Create the ancestor of spinbox*/
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lv_obj_t * new_spinbox = lv_ta_create(par, copy);
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lv_mem_assert(new_spinbox);
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if(new_spinbox == NULL) return NULL;
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/*Allocate the spinbox type specific extended data*/
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lv_spinbox_ext_t * ext = lv_obj_allocate_ext_attr(new_spinbox, sizeof(lv_spinbox_ext_t));
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lv_mem_assert(ext);
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if(ext == NULL) return NULL;
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if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_spinbox);
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if(ancestor_design == NULL) ancestor_design = lv_obj_get_design_func(new_spinbox);
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/*Initialize the allocated 'ext'*/
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ext->ta.one_line = 1;
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ext->ta.pwd_mode = 0;
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ext->ta.accapted_chars = "1234567890+-. ";
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ext->value = 0;
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ext->dec_point_pos = 0;
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ext->digit_count = 5;
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ext->digit_padding_left = 0;
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ext->step = 1;
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ext->range_max = 99999;
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ext->range_min = -99999;
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ext->value_changed_cb = NULL;
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lv_ta_set_cursor_type(new_spinbox, LV_CURSOR_BLOCK | LV_CURSOR_HIDDEN); /*hidden by default*/
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/*The signal and design functions are not copied so set them here*/
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lv_obj_set_signal_func(new_spinbox, lv_spinbox_signal);
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lv_obj_set_design_func(new_spinbox, ancestor_design); /*Leave the Text area's design function*/
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/*Init the new spinbox spinbox*/
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if(copy == NULL) {
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/*Set the default styles*/
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lv_theme_t * th = lv_theme_get_current();
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if(th) {
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lv_spinbox_set_style(new_spinbox, LV_SPINBOX_STYLE_BG, th->spinbox.bg);
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lv_spinbox_set_style(new_spinbox, LV_SPINBOX_STYLE_CURSOR, th->spinbox.cursor);
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lv_spinbox_set_style(new_spinbox, LV_SPINBOX_STYLE_SB, th->spinbox.sb);
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}
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}
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/*Copy an existing spinbox*/
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else {
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lv_spinbox_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
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lv_spinbox_set_value(new_spinbox, copy_ext->value);
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lv_spinbox_set_digit_format(new_spinbox, copy_ext->digit_count, copy_ext->dec_point_pos);
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lv_spinbox_set_range(new_spinbox, copy_ext->range_min, copy_ext->range_max);
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lv_spinbox_set_step(new_spinbox, copy_ext->step);
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/*Refresh the style with new signal function*/
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lv_obj_refresh_style(new_spinbox);
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}
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lv_spinbox_updatevalue(new_spinbox);
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LV_LOG_INFO("spinbox created");
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return new_spinbox;
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}
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/*=====================
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* Setter functions
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*====================*/
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/**
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* Set spinbox value
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* @param spinbox pointer to spinbox
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* @param i value to be set
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*/
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void lv_spinbox_set_value(lv_obj_t * spinbox, int32_t i)
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{
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lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
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if(ext == NULL)
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return;
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if(i > ext->range_max)
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i = ext->range_max;
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if(i < ext->range_min)
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i = ext->range_min;
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ext->value = i;
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lv_spinbox_updatevalue(spinbox);
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}
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/**
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* Set spinbox digit format (digit count and decimal format)
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* @param spinbox pointer to spinbox
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* @param digit_count number of digit excluding the decimal separator and the sign
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* @param separator_position number of digit before the decimal point. If 0, decimal point is not shown
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*/
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void lv_spinbox_set_digit_format(lv_obj_t * spinbox, uint8_t digit_count, uint8_t separator_position)
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{
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lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
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if(ext == NULL)
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return;
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if(digit_count > LV_SPINBOX_MAX_DIGIT_COUNT)
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digit_count = LV_SPINBOX_MAX_DIGIT_COUNT;
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if(separator_position > LV_SPINBOX_MAX_DIGIT_COUNT)
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separator_position = LV_SPINBOX_MAX_DIGIT_COUNT;
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ext->digit_count = digit_count;
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ext->dec_point_pos = separator_position;
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lv_spinbox_updatevalue(spinbox);
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}
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/**
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* Set spinbox step
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* @param spinbox pointer to spinbox
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* @param step steps on increment/decrement
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*/
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void lv_spinbox_set_step(lv_obj_t * spinbox, uint32_t step)
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{
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lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
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if(ext == NULL) return;
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ext->step = step;
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}
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/**
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* Set spinbox value range
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* @param spinbox pointer to spinbox
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* @param range_min maximum value, inclusive
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* @param range_max minimum value, inclusive
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*/
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void lv_spinbox_set_range(lv_obj_t * spinbox, int32_t range_min, int32_t range_max)
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{
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lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
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if(ext == NULL) return;
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ext->range_max = range_max;
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ext->range_min = range_min;
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if(ext->value > ext->range_max) {
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ext->value = ext->range_max;
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lv_obj_invalidate(spinbox);
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}
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if(ext->value < ext->range_min) {
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ext->value = ext->range_min;
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lv_obj_invalidate(spinbox);
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}
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}
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/**
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* Set spinbox callback on calue change
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* @param spinbox pointer to spinbox
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* @param cb Callback function called on value change event
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*/
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void lv_spinbox_set_value_changed_cb(lv_obj_t * spinbox, lv_spinbox_value_changed_cb_t cb)
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{
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lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
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ext->value_changed_cb = cb;
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}
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/**
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* Set spinbox left padding in digits count (added between sign and first digit)
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* @param spinbox pointer to spinbox
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* @param cb Callback function called on value change event
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*/
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void lv_spinbox_set_padding_left(lv_obj_t * spinbox, uint8_t padding)
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{
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lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
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ext->digit_padding_left = padding;
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lv_spinbox_updatevalue(spinbox);
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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 spinbox numeral value (user has to convert to float according to its digit format)
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* @param spinbox pointer to spinbox
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* @return value integer value of the spinbox
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*/
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int32_t lv_spinbox_get_value(lv_obj_t * spinbox)
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{
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lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
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return ext->value;
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}
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/*=====================
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* Other functions
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*====================*/
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/**
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* Select next lower digit for edition by dividing the step by 10
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* @param spinbox pointer to spinbox
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*/
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void lv_spinbox_step_next(lv_obj_t * spinbox)
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{
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lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
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int32_t new_step = ext->step / 10;
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if((new_step) > 0) ext->step = new_step;
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else ext->step = 1;
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lv_spinbox_updatevalue(spinbox);
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}
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/**
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* Select next higher digit for edition by multiplying the step by 10
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* @param spinbox pointer to spinbox
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*/
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void lv_spinbox_step_previous(lv_obj_t * spinbox)
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{
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lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
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int32_t step_limit;
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step_limit = LV_MATH_MAX(ext->range_max, (ext->range_min < 0 ? (-ext->range_min) : ext->range_min));
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int32_t new_step = ext->step * 10;
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if(new_step <= step_limit) ext->step = new_step;
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lv_spinbox_updatevalue(spinbox);
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}
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/**
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* Increment spinbox value by one step
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* @param spinbox pointer to spinbox
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*/
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void lv_spinbox_increment(lv_obj_t * spinbox)
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{
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lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
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if(ext->value + ext->step <= ext->range_max) {
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/*Special mode when zero crossing*/
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if((ext->value + ext->step) > 0 && ext->value < 0) ext->value = -ext->value;
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ext->value += ext->step;
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} else {
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ext->value = ext->range_max;
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}
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if(ext->value_changed_cb != NULL) ext->value_changed_cb(spinbox, ext->value);
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lv_spinbox_updatevalue(spinbox);
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}
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/**
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* Decrement spinbox value by one step
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* @param spinbox pointer to spinbox
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*/
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void lv_spinbox_decrement(lv_obj_t * spinbox)
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{
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lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
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if(ext->value - ext->step >= ext->range_min) {
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/*Special mode when zero crossing*/
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if((ext->value - ext->step) < 0 && ext->value > 0) ext->value = -ext->value;
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ext->value -= ext->step;
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} else {
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ext->value = ext->range_min;
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}
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if(ext->value_changed_cb != NULL) ext->value_changed_cb(spinbox, ext->value);
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lv_spinbox_updatevalue(spinbox);
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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/**
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* Signal function of the spinbox
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* @param spinbox pointer to a spinbox object
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* @param sign a signal type from lv_signal_t enum
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* @param param pointer to a signal specific variable
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* @return LV_RES_OK: the object is not deleted in the function; LV_RES_INV: the object is deleted
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*/
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static lv_res_t lv_spinbox_signal(lv_obj_t * spinbox, lv_signal_t sign, void * param)
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{
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lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
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lv_res_t res = LV_RES_OK;
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/* Include the ancient signal function */
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if(sign != LV_SIGNAL_CONTROLL)
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{
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res = ancestor_signal(spinbox, sign, param);
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if(res != LV_RES_OK) return res;
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}
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if(sign == LV_SIGNAL_CLEANUP) {
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/*Nothing to cleanup. (No dynamically allocated memory in 'ext')*/
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} else if(sign == LV_SIGNAL_GET_TYPE)
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{
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lv_obj_type_t * buf = param;
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uint8_t i;
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for(i = 0; i < LV_MAX_ANCESTOR_NUM - 1; i++)
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{ /*Find the last set data*/
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if(buf->type[i] == NULL) break;
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}
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buf->type[i] = "lv_spinbox";
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}
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else if(sign == LV_SIGNAL_CONTROLL) {
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lv_hal_indev_type_t indev_type = lv_indev_get_type(lv_indev_get_act());
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uint32_t c = *((uint32_t *)param); /*uint32_t because can be UTF-8*/
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if(c == LV_GROUP_KEY_RIGHT) {
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if(indev_type == LV_INDEV_TYPE_ENCODER) lv_spinbox_increment(spinbox);
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else lv_spinbox_step_next(spinbox);
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}
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else if(c == LV_GROUP_KEY_LEFT) {
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if(indev_type == LV_INDEV_TYPE_ENCODER) lv_spinbox_decrement(spinbox);
|
||
|
|
else lv_spinbox_step_previous(spinbox);
|
||
|
|
}
|
||
|
|
else if(c == LV_GROUP_KEY_UP) {
|
||
|
|
lv_spinbox_increment(spinbox);
|
||
|
|
}
|
||
|
|
else if(c == LV_GROUP_KEY_DOWN) {
|
||
|
|
lv_spinbox_decrement(spinbox);
|
||
|
|
}
|
||
|
|
else if(c == LV_GROUP_KEY_ENTER) {
|
||
|
|
|
||
|
|
if(ext->step > 1) {
|
||
|
|
lv_spinbox_step_next(spinbox);
|
||
|
|
} else {
|
||
|
|
/*Restart from the MSB*/
|
||
|
|
ext->step = 1;
|
||
|
|
uint32_t i;
|
||
|
|
for(i = 0; i < ext->digit_count; i++) {
|
||
|
|
int32_t new_step = ext->step * 10;
|
||
|
|
if(new_step >= ext->range_max) break;
|
||
|
|
ext->step = new_step;
|
||
|
|
}
|
||
|
|
lv_spinbox_step_previous(spinbox);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
lv_ta_add_char(spinbox, c);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void lv_spinbox_updatevalue(lv_obj_t * spinbox)
|
||
|
|
{
|
||
|
|
lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
|
||
|
|
|
||
|
|
char buf[LV_SPINBOX_MAX_DIGIT_COUNT + 8];
|
||
|
|
memset(buf, 0, sizeof(buf));
|
||
|
|
char * buf_p = buf;
|
||
|
|
|
||
|
|
/*Add the sign*/
|
||
|
|
(*buf_p) = ext->value >= 0 ? '+' : '-';
|
||
|
|
buf_p++;
|
||
|
|
|
||
|
|
int i;
|
||
|
|
/*padding left*/
|
||
|
|
for(i = 0; i < ext->digit_padding_left; i++) {
|
||
|
|
(*buf_p) = ' ';
|
||
|
|
buf_p++;
|
||
|
|
}
|
||
|
|
|
||
|
|
char digits[64];
|
||
|
|
/*Convert the numbers to string (the sign is already handled so always covert positive number)*/
|
||
|
|
lv_math_num_to_str(ext->value < 0 ? -ext->value : ext->value, digits);
|
||
|
|
|
||
|
|
/*Add leading zeros*/
|
||
|
|
int lz_cnt = ext->digit_count - (int)strlen(digits);
|
||
|
|
if(lz_cnt > 0) {
|
||
|
|
for(i = strlen(digits); i >= 0; i--) {
|
||
|
|
digits[i + lz_cnt] = digits[i];
|
||
|
|
}
|
||
|
|
for(i = 0; i < lz_cnt; i++) {
|
||
|
|
digits[i] = '0';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
int32_t intDigits;
|
||
|
|
intDigits = (ext->dec_point_pos == 0) ? ext->digit_count : ext->dec_point_pos;
|
||
|
|
|
||
|
|
/*Add the decimal part*/
|
||
|
|
for(i = 0; i < intDigits && digits[i] != '\0'; i++) {
|
||
|
|
(*buf_p) = digits[i];
|
||
|
|
buf_p++;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(ext->dec_point_pos != 0) {
|
||
|
|
/*Insert the decimal point*/
|
||
|
|
(*buf_p) = '.';
|
||
|
|
buf_p++;
|
||
|
|
|
||
|
|
for(/*Leave i*/ ;i < ext->digit_count && digits[i] != '\0'; i++) {
|
||
|
|
(*buf_p) = digits[i];
|
||
|
|
buf_p++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*Refresh the text*/
|
||
|
|
lv_ta_set_text(spinbox, (char*)buf);
|
||
|
|
|
||
|
|
|
||
|
|
/*Set the cursor position*/
|
||
|
|
int32_t step = ext->step;
|
||
|
|
uint8_t cur_pos = ext->digit_count;
|
||
|
|
while(step >= 10)
|
||
|
|
{
|
||
|
|
step /= 10;
|
||
|
|
cur_pos--;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(cur_pos > intDigits ) cur_pos ++; /*Skip teh decimal point*/
|
||
|
|
|
||
|
|
cur_pos += ext->digit_padding_left;
|
||
|
|
|
||
|
|
lv_ta_set_cursor_pos(spinbox, cur_pos);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|