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lvgl/lv_objx/lv_spinbox.c

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/**
* @file lv_spinbox.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_spinbox.h"
#if USE_LV_SPINBOX != 0
#include "../lv_themes/lv_theme.h"
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static lv_res_t lv_spinbox_signal(lv_obj_t * spinbox, lv_signal_t sign, void * param);
static void lv_spinbox_updatevalue(lv_obj_t * spinbox);
/**********************
* STATIC VARIABLES
**********************/
static lv_signal_func_t ancestor_signal;
static lv_design_func_t ancestor_design;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Create a spinbox object
* @param par pointer to an object, it will be the parent of the new spinbox
* @param copy pointer to a spinbox object, if not NULL then the new object will be copied from it
* @return pointer to the created spinbox
*/
lv_obj_t * lv_spinbox_create(lv_obj_t * par, const lv_obj_t * copy)
{
LV_LOG_TRACE("spinbox create started");
/*Create the ancestor of spinbox*/
lv_obj_t * new_spinbox = lv_ta_create(par, copy);
lv_mem_assert(new_spinbox);
if(new_spinbox == NULL) return NULL;
/*Allocate the spinbox type specific extended data*/
lv_spinbox_ext_t * ext = lv_obj_allocate_ext_attr(new_spinbox, sizeof(lv_spinbox_ext_t));
lv_mem_assert(ext);
if(ext == NULL) return NULL;
if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_spinbox);
if(ancestor_design == NULL) ancestor_design = lv_obj_get_design_func(new_spinbox);
/*Initialize the allocated 'ext'*/
ext->ta.one_line = 1;
ext->ta.pwd_mode = 0;
ext->ta.accapted_chars = "1234567890+-.";
ext->value = 0;
ext->dec_point_pos = 2;
ext->digit_count = 5;
ext->step = 100;
ext->range_max = 99999;
ext->range_min = -99999;
ext->value_changed_cb = NULL;
lv_ta_set_cursor_type(new_spinbox, LV_CURSOR_BLOCK | LV_CURSOR_HIDDEN); /*hidden by default*/
lv_ta_set_cursor_pos(new_spinbox, 4);
/*The signal and design functions are not copied so set them here*/
lv_obj_set_signal_func(new_spinbox, lv_spinbox_signal);
lv_obj_set_design_func(new_spinbox, ancestor_design); /*Leave the Text area's design function*/
/*Init the new spinbox spinbox*/
if(copy == NULL) {
/*Set the default styles*/
lv_theme_t * th = lv_theme_get_current();
if(th) {
lv_spinbox_set_style(new_spinbox, LV_SPINBOX_STYLE_BG, th->spinbox.bg);
lv_spinbox_set_style(new_spinbox, LV_SPINBOX_STYLE_CURSOR, th->spinbox.cursor);
lv_spinbox_set_style(new_spinbox, LV_SPINBOX_STYLE_SB, th->spinbox.sb);
}
}
/*Copy an existing spinbox*/
else {
lv_spinbox_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
lv_spinbox_set_value(new_spinbox, copy_ext->value);
lv_spinbox_set_digit_format(new_spinbox, copy_ext->digit_count, copy_ext->dec_point_pos);
lv_spinbox_set_range(new_spinbox, copy_ext->range_min, copy_ext->range_max);
lv_spinbox_set_step(new_spinbox, copy_ext->step);
/*Refresh the style with new signal function*/
lv_obj_refresh_style(new_spinbox);
}
lv_spinbox_updatevalue(new_spinbox);
LV_LOG_INFO("spinbox created");
return new_spinbox;
}
/*=====================
* Setter functions
*====================*/
/**
* Set spinbox value
* @param spinbox pointer to spinbox
* @param i value to be set
*/
void lv_spinbox_set_value(lv_obj_t * spinbox, int32_t i)
{
lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
if(ext == NULL)
return;
if(i > ext->range_max)
i = ext->range_max;
if(i < ext->range_min)
i = ext->range_min;
ext->value = i;
lv_spinbox_updatevalue(spinbox);
}
/**
* Set spinbox digit format (digit count and decimal format)
* @param spinbox pointer to spinbox
* @param digit_count number of digit excluding the decimal separator and the sign
* @param separator_position number of digit before the decimal point. If 0, decimal point is not shown
*/
void lv_spinbox_set_digit_format(lv_obj_t * spinbox, uint8_t digit_count, uint8_t separator_position)
{
lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
if(ext == NULL)
return;
if(digit_count > LV_SPINBOX_MAX_DIGIT_COUNT)
digit_count = LV_SPINBOX_MAX_DIGIT_COUNT;
if(separator_position > LV_SPINBOX_MAX_DIGIT_COUNT)
separator_position = LV_SPINBOX_MAX_DIGIT_COUNT;
ext->digit_count = digit_count;
ext->dec_point_pos = separator_position;
lv_spinbox_updatevalue(spinbox);
}
/**
* Set spinbox step
* @param spinbox pointer to spinbox
* @param step steps on increment/decrement
*/
void lv_spinbox_set_step(lv_obj_t * spinbox, uint32_t step)
{
lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
if(ext == NULL) return;
ext->step = step;
}
/**
* Set spinbox value range
* @param spinbox pointer to spinbox
* @param range_min maximum value, inclusive
* @param range_max minimum value, inclusive
*/
void lv_spinbox_set_range(lv_obj_t * spinbox, int32_t range_min, int32_t range_max)
{
lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
if(ext == NULL) return;
ext->range_max = range_max;
ext->range_min = range_min;
if(ext->value > ext->range_max)
{
ext->value = ext->range_max;
lv_obj_invalidate(spinbox);
}
if(ext->value < ext->range_min)
{
ext->value = ext->range_min;
lv_obj_invalidate(spinbox);
}
}
/**
* Set spinbox callback on calue change
* @param spinbox pointer to spinbox
* @param cb Callback function called on value change event
*/
void lv_spinbox_set_value_changed_cb(lv_obj_t * spinbox, lv_spinbox_value_changed_cb_t cb)
{
lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
ext->value_changed_cb = cb;
}
/**
* Set spinbox left padding in digits count (added between sign and first digit)
* @param spinbox pointer to spinbox
* @param cb Callback function called on value change event
*/
void lv_spinbox_set_padding_left(lv_obj_t * spinbox, uint8_t padding)
{
lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
ext->digit_padding_left = padding;
lv_spinbox_updatevalue(spinbox);
}
/*=====================
* Getter functions
*====================*/
/**
* Get the spinbox numeral value (user has to convert to float according to its digit format)
* @param spinbox pointer to spinbox
* @return value integer value of the spinbox
*/
int32_t lv_spinbox_get_value(lv_obj_t * spinbox)
{
lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
return ext->value;
}
/*=====================
* Other functions
*====================*/
/**
* Select next lower digit for edition by dividing the step by 10
* @param spinbox pointer to spinbox
*/
void lv_spinbox_step_next(lv_obj_t * spinbox)
{
lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
if((ext->step / 10) < ext->range_max && (ext->step / 10) > ext->range_min && (ext->step / 10) > 0)
{
ext->step /= 10;
}
lv_spinbox_updatevalue(spinbox);
}
/**
* Select next higher digit for edition by multiplying the step by 10
* @param spinbox pointer to spinbox
*/
void lv_spinbox_step_previous(lv_obj_t * spinbox)
{
lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
if((ext->step * 10) <= ext->range_max && (ext->step * 10) > ext->range_min && (ext->step * 10) > 0)
{
ext->step *= 10;
}
lv_spinbox_updatevalue(spinbox);
}
/**
* Increment spinbox value by one step
* @param spinbox pointer to spinbox
*/
void lv_spinbox_increment(lv_obj_t * spinbox)
{
lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
if(ext->value + ext->step <= ext->range_max)
{
/*Special mode when zero crossing*/
if((ext->value + ext->step) > 0 && ext->value < 0)
{
ext->value = -ext->value;
}/*end special mode*/
ext->value += ext->step;
if(ext->value_changed_cb != NULL)
{
ext->value_changed_cb(spinbox, ext->value);
}
}
lv_spinbox_updatevalue(spinbox);
}
/**
* Decrement spinbox value by one step
* @param spinbox pointer to spinbox
*/
void lv_spinbox_decrement(lv_obj_t * spinbox)
{
lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
if(ext->value - ext->step >= ext->range_min)
{
/*Special mode when zero crossing*/
if((ext->value - ext->step) < 0 && ext->value > 0)
{
ext->value = -ext->value;
}/*end special mode*/
ext->value -= ext->step;
if(ext->value_changed_cb != NULL)
{
ext->value_changed_cb(spinbox, ext->value);
}
}
lv_spinbox_updatevalue(spinbox);
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Signal function of the spinbox
* @param spinbox pointer to a spinbox object
* @param sign a signal type from lv_signal_t enum
* @param param pointer to a signal specific variable
* @return LV_RES_OK: the object is not deleted in the function; LV_RES_INV: the object is deleted
*/
static lv_res_t lv_spinbox_signal(lv_obj_t * spinbox, lv_signal_t sign, void * param)
{
lv_spinbox_ext_t * ext = lv_obj_get_ext_attr(spinbox);
lv_res_t res = LV_RES_OK;
/* Include the ancient signal function */
if(sign != LV_SIGNAL_CONTROLL)
{
res = ancestor_signal(spinbox, sign, param);
if(res != LV_RES_OK) return res;
}
if(sign == LV_SIGNAL_CLEANUP) {
/*Nothing to cleanup. (No dynamically allocated memory in 'ext')*/
} else if(sign == LV_SIGNAL_GET_TYPE)
{
lv_obj_type_t * buf = param;
uint8_t i;
for(i = 0; i < LV_MAX_ANCESTOR_NUM - 1; i++)
{ /*Find the last set data*/
if(buf->type[i] == NULL) break;
}
buf->type[i] = "lv_spinbox";
}else if(sign == LV_SIGNAL_CONTROLL)
{
lv_hal_indev_type_t indev_type = lv_indev_get_type(lv_indev_get_act());
uint32_t c = *((uint32_t *)param); /*uint32_t because can be UTF-8*/
if(c == LV_GROUP_KEY_RIGHT)
{
if(indev_type == LV_INDEV_TYPE_ENCODER)
{
lv_spinbox_increment(spinbox);
}
else
{
lv_spinbox_step_next(spinbox);
}
}
else if(c == LV_GROUP_KEY_LEFT)
{
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)
{
int p = lv_ta_get_cursor_pos(spinbox);
if(p == (1 + ext->digit_padding_left + ext->digit_count))
{
for(int i = 0; i < ext->digit_count; i++)
lv_spinbox_step_previous(spinbox);
} else
{
lv_spinbox_step_next(spinbox);
}
lv_spinbox_updatevalue(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);
int32_t v = ext->value;
int32_t intDigits, decDigits;
uint8_t dc = ext->digit_count;
intDigits = (ext->dec_point_pos==0) ? ext->digit_count : ext->dec_point_pos;
decDigits = ext->digit_count - intDigits;
ext->digits[0] = v>=0 ? '+' : '-';
int pl; /*padding left*/
for(pl = 0; pl < ext->digit_padding_left; pl++)
{
ext->digits[1 + pl] = ' ';
}
int i = 0;
uint8_t digits[16];
if(v < 0)
v = -v;
for(i = 0; i < dc; i++)
{
digits[i] = v%10;
v = v/10;
}
int k;
for(k = 0; k < intDigits; k++)
{
ext->digits[1 + pl + k] = '0' + digits[--i];
}
ext->digits[1 + pl + intDigits] = '.';
int d;
for(d = 0; d < decDigits; d++)
{
ext->digits[1 + pl + intDigits + 1 + d] = '0' + digits[--i];
}
ext->digits[1 + pl + intDigits + 1 + decDigits] = '\0';
lv_label_set_text(ext->ta.label, (char*)ext->digits);
int32_t step = ext->step;
uint8_t cPos = ext->digit_count + pl;
while(step >= 10)
{
step /= 10;
cPos--;
}
if(cPos > pl + intDigits )
{
cPos ++;
}
lv_ta_set_cursor_pos(spinbox, cPos);
}
#endif
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