Picklock_RCM/bdk/libs/lvgl/lv_objx/lv_lmeter.c

383 lines
12 KiB
C

/**
* @file lv_lmeter.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_lmeter.h"
#if USE_LV_LMETER != 0
#include "../lv_draw/lv_draw.h"
#include "../lv_themes/lv_theme.h"
#include "../lv_core/lv_group.h"
#include "../lv_misc/lv_math.h"
/*********************
* DEFINES
*********************/
#define LV_LMETER_LINE_UPSCALE 5 /*2^x upscale of line to make rounding*/
#define LV_LMETER_LINE_UPSCALE_MASK ((1 << LV_LMETER_LINE_UPSCALE) - 1)
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static bool lv_lmeter_design(lv_obj_t * lmeter, const lv_area_t * mask, lv_design_mode_t mode);
static lv_res_t lv_lmeter_signal(lv_obj_t * lmeter, lv_signal_t sign, void * param);
static lv_coord_t lv_lmeter_coord_round(int32_t x);
/**********************
* STATIC VARIABLES
**********************/
static lv_signal_func_t ancestor_signal;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Create a line meter objects
* @param par pointer to an object, it will be the parent of the new line meter
* @param copy pointer to a line meter object, if not NULL then the new object will be copied from it
* @return pointer to the created line meter
*/
lv_obj_t * lv_lmeter_create(lv_obj_t * par, const lv_obj_t * copy)
{
LV_LOG_TRACE("line meter create started");
/*Create the ancestor of line meter*/
lv_obj_t * new_lmeter = lv_obj_create(par, copy);
lv_mem_assert(new_lmeter);
if(new_lmeter == NULL) return NULL;
if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_lmeter);
/*Allocate the line meter type specific extended data*/
lv_lmeter_ext_t * ext = lv_obj_allocate_ext_attr(new_lmeter, sizeof(lv_lmeter_ext_t));
lv_mem_assert(ext);
if(ext == NULL) return NULL;
/*Initialize the allocated 'ext' */
ext->min_value = 0;
ext->max_value = 100;
ext->cur_value = 0;
ext->line_cnt = 21; /*Odd scale number looks better*/
ext->scale_angle = 240; /*(scale_num - 1) * N looks better */
/*The signal and design functions are not copied so set them here*/
lv_obj_set_signal_func(new_lmeter, lv_lmeter_signal);
lv_obj_set_design_func(new_lmeter, lv_lmeter_design);
/*Init the new line meter line meter*/
if(copy == NULL) {
lv_obj_set_size(new_lmeter, LV_DPI, LV_DPI);
/*Set the default styles*/
lv_theme_t * th = lv_theme_get_current();
if(th) {
lv_lmeter_set_style(new_lmeter, th->lmeter);
} else {
lv_lmeter_set_style(new_lmeter, &lv_style_pretty_color);
}
}
/*Copy an existing line meter*/
else {
lv_lmeter_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
ext->scale_angle = copy_ext->scale_angle;
ext->line_cnt = copy_ext->line_cnt;
ext->min_value = copy_ext->min_value;
ext->max_value = copy_ext->max_value;
ext->cur_value = copy_ext->cur_value;
/*Refresh the style with new signal function*/
lv_obj_refresh_style(new_lmeter);
}
LV_LOG_INFO("line meter created");
return new_lmeter;
}
/*=====================
* Setter functions
*====================*/
/**
* Set a new value on the line meter
* @param lmeter pointer to a line meter object
* @param value new value
*/
void lv_lmeter_set_value(lv_obj_t * lmeter, int16_t value)
{
lv_lmeter_ext_t * ext = lv_obj_get_ext_attr(lmeter);
if(ext->cur_value == value) return;
ext->cur_value = value > ext->max_value ? ext->max_value : value;
ext->cur_value = ext->cur_value < ext->min_value ? ext->min_value : ext->cur_value;
lv_obj_invalidate(lmeter);
}
/**
* Set minimum and the maximum values of a line meter
* @param lmeter pointer to he line meter object
* @param min minimum value
* @param max maximum value
*/
void lv_lmeter_set_range(lv_obj_t * lmeter, int16_t min, int16_t max)
{
lv_lmeter_ext_t * ext = lv_obj_get_ext_attr(lmeter);
if(ext->min_value == min && ext->max_value == max) return;
ext->max_value = max;
ext->min_value = min;
if(ext->cur_value > max) {
ext->cur_value = max;
lv_lmeter_set_value(lmeter, ext->cur_value);
}
if(ext->cur_value < min) {
ext->cur_value = min;
lv_lmeter_set_value(lmeter, ext->cur_value);
}
lv_obj_invalidate(lmeter);
}
/**
* Set the scale settings of a line meter
* @param lmeter pointer to a line meter object
* @param angle angle of the scale (0..360)
* @param line_cnt number of lines
*/
void lv_lmeter_set_scale(lv_obj_t * lmeter, uint16_t angle, uint8_t line_cnt)
{
lv_lmeter_ext_t * ext = lv_obj_get_ext_attr(lmeter);
if(ext->scale_angle == angle && ext->line_cnt == line_cnt) return;
ext->scale_angle = angle;
ext->line_cnt = line_cnt;
lv_obj_invalidate(lmeter);
}
/*=====================
* Getter functions
*====================*/
/**
* Get the value of a line meter
* @param lmeter pointer to a line meter object
* @return the value of the line meter
*/
int16_t lv_lmeter_get_value(const lv_obj_t * lmeter)
{
lv_lmeter_ext_t * ext = lv_obj_get_ext_attr(lmeter);
return ext->cur_value;
}
/**
* Get the minimum value of a line meter
* @param lmeter pointer to a line meter object
* @return the minimum value of the line meter
*/
int16_t lv_lmeter_get_min_value(const lv_obj_t * lmeter)
{
lv_lmeter_ext_t * ext = lv_obj_get_ext_attr(lmeter);
return ext->min_value;
}
/**
* Get the maximum value of a line meter
* @param lmeter pointer to a line meter object
* @return the maximum value of the line meter
*/
int16_t lv_lmeter_get_max_value(const lv_obj_t * lmeter)
{
lv_lmeter_ext_t * ext = lv_obj_get_ext_attr(lmeter);
return ext->max_value;
}
/**
* Get the scale number of a line meter
* @param lmeter pointer to a line meter object
* @return number of the scale units
*/
uint8_t lv_lmeter_get_line_count(const lv_obj_t * lmeter)
{
lv_lmeter_ext_t * ext = lv_obj_get_ext_attr(lmeter);
return ext->line_cnt ;
}
/**
* Get the scale angle of a line meter
* @param lmeter pointer to a line meter object
* @return angle of the scale
*/
uint16_t lv_lmeter_get_scale_angle(const lv_obj_t * lmeter)
{
lv_lmeter_ext_t * ext = lv_obj_get_ext_attr(lmeter);
return ext->scale_angle;
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Handle the drawing related tasks of the line meters
* @param lmeter pointer to an object
* @param mask the object will be drawn only in this area
* @param mode LV_DESIGN_COVER_CHK: only check if the object fully covers the 'mask_p' area
* (return 'true' if yes)
* LV_DESIGN_DRAW: draw the object (always return 'true')
* LV_DESIGN_DRAW_POST: drawing after every children are drawn
* @param return true/false, depends on 'mode'
*/
static bool lv_lmeter_design(lv_obj_t * lmeter, const lv_area_t * mask, lv_design_mode_t mode)
{
/*Return false if the object is not covers the mask_p area*/
if(mode == LV_DESIGN_COVER_CHK) {
return false;
}
/*Draw the object*/
else if(mode == LV_DESIGN_DRAW_MAIN) {
lv_lmeter_ext_t * ext = lv_obj_get_ext_attr(lmeter);
lv_style_t * style = lv_obj_get_style(lmeter);
lv_opa_t opa_scale = lv_obj_get_opa_scale(lmeter);
lv_style_t style_tmp;
memcpy(&style_tmp, style, sizeof(lv_style_t));
#if USE_LV_GROUP
lv_group_t * g = lv_obj_get_group(lmeter);
if(lv_group_get_focused(g) == lmeter) {
style_tmp.line.width += 1;
}
#endif
lv_coord_t r_out = lv_obj_get_width(lmeter) / 2;
lv_coord_t r_in = r_out - style->body.padding.hor;
if(r_in < 1) r_in = 1;
lv_coord_t x_ofs = lv_obj_get_width(lmeter) / 2 + lmeter->coords.x1;
lv_coord_t y_ofs = lv_obj_get_height(lmeter) / 2 + lmeter->coords.y1;
int16_t angle_ofs = 90 + (360 - ext->scale_angle) / 2;
int16_t level = (int32_t)((int32_t)(ext->cur_value - ext->min_value) * ext->line_cnt) / (ext->max_value - ext->min_value);
uint8_t i;
style_tmp.line.color = style->body.main_color;
/*Calculate every coordinate in a bigger size to make rounding later*/
r_out = r_out << LV_LMETER_LINE_UPSCALE;
r_in = r_in << LV_LMETER_LINE_UPSCALE;
for(i = 0; i < ext->line_cnt; i++) {
/*Calculate the position a scale label*/
int16_t angle = (i * ext->scale_angle) / (ext->line_cnt - 1) + angle_ofs;
lv_coord_t y_out = (int32_t)((int32_t)lv_trigo_sin(angle) * r_out) >> LV_TRIGO_SHIFT;
lv_coord_t x_out = (int32_t)((int32_t)lv_trigo_sin(angle + 90) * r_out) >> LV_TRIGO_SHIFT;
lv_coord_t y_in = (int32_t)((int32_t)lv_trigo_sin(angle) * r_in) >> LV_TRIGO_SHIFT;
lv_coord_t x_in = (int32_t)((int32_t)lv_trigo_sin(angle + 90) * r_in) >> LV_TRIGO_SHIFT;
/*Rounding*/
x_out = lv_lmeter_coord_round(x_out);
x_in = lv_lmeter_coord_round(x_in);
y_out = lv_lmeter_coord_round(y_out);
y_in = lv_lmeter_coord_round(y_in);
lv_point_t p1;
lv_point_t p2;
p2.x = x_in + x_ofs;
p2.y = y_in + y_ofs;
p1.x = x_out + x_ofs;
p1.y = y_out + y_ofs;
if(i >= level) style_tmp.line.color = style->line.color;
else {
style_tmp.line.color = lv_color_mix(style->body.grad_color, style->body.main_color, (255 * i) / ext->line_cnt);
}
lv_draw_line(&p1, &p2, mask, &style_tmp, opa_scale);
}
}
/*Post draw when the children are drawn*/
else if(mode == LV_DESIGN_DRAW_POST) {
}
return true;
}
/**
* Signal function of the line meter
* @param lmeter pointer to a line meter 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_lmeter_signal(lv_obj_t * lmeter, lv_signal_t sign, void * param)
{
lv_res_t res;
/* Include the ancient signal function */
res = ancestor_signal(lmeter, 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_STYLE_CHG) {
lv_obj_refresh_ext_size(lmeter);
} else if(sign == LV_SIGNAL_REFR_EXT_SIZE) {
lv_style_t * style = lv_lmeter_get_style(lmeter);
lmeter->ext_size = LV_MATH_MAX(lmeter->ext_size, style->line.width);
} 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_lmeter";
}
return res;
}
/**
* Round a coordinate which is upscaled (>=x.5 -> x + 1; <x.5 -> x)
* @param x a coordinate which is greater then it should be
* @return the downscaled and rounded coordinate (+-1)
*/
static lv_coord_t lv_lmeter_coord_round(int32_t x)
{
#if LV_LMETER_LINE_UPSCALE > 0
bool was_negative = false;
if(x < 0) {
was_negative = true;
x = -x;
}
x = (x >> LV_LMETER_LINE_UPSCALE) + ((x & LV_LMETER_LINE_UPSCALE_MASK) >> (LV_LMETER_LINE_UPSCALE - 1));
if(was_negative) x = -x;
return x;
#else
return x;
#endif
}
#endif