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Incognito_RCM/bdk/libs/lvgl/lv_objx/lv_chart.c
Dan Ware 5dde50e8c4 Implement Hekate BDK structure
2020-12-22 15:34:14 +00:00

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/**
* @file lv_chart.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_chart.h"
#if USE_LV_CHART != 0
#include "../lv_draw/lv_draw.h"
#include "../lv_themes/lv_theme.h"
/*********************
* DEFINES
*********************/
#define LV_CHART_YMIN_DEF 0
#define LV_CHART_YMAX_DEF 100
#define LV_CHART_HDIV_DEF 3
#define LV_CHART_VDIV_DEF 5
#define LV_CHART_PNUM_DEF 10
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static bool lv_chart_design(lv_obj_t * chart, const lv_area_t * mask, lv_design_mode_t mode);
static lv_res_t lv_chart_signal(lv_obj_t * chart, lv_signal_t sign, void * param);
static void lv_chart_draw_div(lv_obj_t * chart, const lv_area_t * mask);
static void lv_chart_draw_lines(lv_obj_t * chart, const lv_area_t * mask);
static void lv_chart_draw_points(lv_obj_t * chart, const lv_area_t * mask);
static void lv_chart_draw_cols(lv_obj_t * chart, const lv_area_t * mask);
static void lv_chart_draw_vertical_lines(lv_obj_t * chart, const lv_area_t * mask);
/**********************
* STATIC VARIABLES
**********************/
static lv_design_func_t ancestor_design_f;
static lv_signal_func_t ancestor_signal;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Create a chart background objects
* @param par pointer to an object, it will be the parent of the new chart background
* @param copy pointer to a chart background object, if not NULL then the new object will be copied from it
* @return pointer to the created chart background
*/
lv_obj_t * lv_chart_create(lv_obj_t * par, const lv_obj_t * copy)
{
LV_LOG_TRACE("chart create started");
/*Create the ancestor basic object*/
lv_obj_t * new_chart = lv_obj_create(par, copy);
lv_mem_assert(new_chart);
if(new_chart == NULL) return NULL;
/*Allocate the object type specific extended data*/
lv_chart_ext_t * ext = lv_obj_allocate_ext_attr(new_chart, sizeof(lv_chart_ext_t));
lv_mem_assert(ext);
if(ext == NULL) return NULL;
lv_ll_init(&ext->series_ll, sizeof(lv_chart_series_t));
ext->series.num = 0;
ext->ymin = LV_CHART_YMIN_DEF;
ext->ymax = LV_CHART_YMAX_DEF;
ext->hdiv_cnt = LV_CHART_HDIV_DEF;
ext->vdiv_cnt = LV_CHART_VDIV_DEF;
ext->point_cnt = LV_CHART_PNUM_DEF;
ext->type = LV_CHART_TYPE_LINE;
ext->series.opa = LV_OPA_COVER;
ext->series.dark = LV_OPA_50;
ext->series.width = 2;
if(ancestor_design_f == NULL) ancestor_design_f = lv_obj_get_design_func(new_chart);
if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_chart);
lv_obj_set_signal_func(new_chart, lv_chart_signal);
lv_obj_set_design_func(new_chart, lv_chart_design);
/*Init the new chart background object*/
if(copy == NULL) {
lv_obj_set_size(new_chart, LV_HOR_RES / 3, LV_VER_RES / 3);
/*Set the default styles*/
lv_theme_t * th = lv_theme_get_current();
if(th) {
lv_chart_set_style(new_chart, th->chart);
} else {
lv_chart_set_style(new_chart, &lv_style_pretty);
}
} else {
lv_chart_ext_t * ext_copy = lv_obj_get_ext_attr(copy);
ext->type = ext_copy->type;
ext->ymin = ext_copy->ymin;
ext->ymax = ext_copy->ymax;
ext->hdiv_cnt = ext_copy->hdiv_cnt;
ext->vdiv_cnt = ext_copy->vdiv_cnt;
ext->point_cnt = ext_copy->point_cnt;
ext->series.opa = ext_copy->series.opa;
/*Refresh the style with new signal function*/
lv_obj_refresh_style(new_chart);
}
LV_LOG_INFO("chart created");
return new_chart;
}
/*======================
* Add/remove functions
*=====================*/
/**
* Allocate and add a data series to the chart
* @param chart pointer to a chart object
* @param color color of the data series
* @return pointer to the allocated data series
*/
lv_chart_series_t * lv_chart_add_series(lv_obj_t * chart, lv_color_t color)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
lv_chart_series_t * ser = lv_ll_ins_head(&ext->series_ll);
lv_mem_assert(ser);
if(ser == NULL) return NULL;
lv_coord_t def = LV_CHART_POINT_DEF;
if(ser == NULL) return NULL;
ser->color = color;
ser->points = lv_mem_alloc(sizeof(lv_coord_t) * ext->point_cnt);
lv_mem_assert(ser->points);
if(ser->points == NULL) {
lv_ll_rem(&ext->series_ll, ser);
lv_mem_free(ser);
return NULL;
}
ser->start_point = 0;
uint16_t i;
lv_coord_t * p_tmp = ser->points;
for(i = 0; i < ext->point_cnt; i++) {
*p_tmp = def;
p_tmp++;
}
ext->series.num++;
return ser;
}
/**
* Clear the point of a serie
* @param chart pointer to a chart object
* @param serie pointer to the chart's serie to clear
*/
void lv_chart_clear_serie(lv_obj_t * chart, lv_chart_series_t * serie)
{
if(chart == NULL || serie == NULL)
return;
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
if(ext == NULL) return;
uint32_t i;
for(i = 0; i < ext->point_cnt; i++)
{
serie->points[i] = LV_CHART_POINT_DEF;
}
serie->start_point = 0;
}
/*=====================
* Setter functions
*====================*/
/**
* Set the number of horizontal and vertical division lines
* @param chart pointer to a graph background object
* @param hdiv number of horizontal division lines
* @param vdiv number of vertical division lines
*/
void lv_chart_set_div_line_count(lv_obj_t * chart, uint8_t hdiv, uint8_t vdiv)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
if(ext->hdiv_cnt == hdiv && ext->vdiv_cnt == vdiv) return;
ext->hdiv_cnt = hdiv;
ext->vdiv_cnt = vdiv;
lv_obj_invalidate(chart);
}
/**
* Set the minimal and maximal y values
* @param chart pointer to a graph background object
* @param ymin y minimum value
* @param ymax y maximum value
*/
void lv_chart_set_range(lv_obj_t * chart, lv_coord_t ymin, lv_coord_t ymax)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
if(ext->ymin == ymin && ext->ymax == ymax) return;
ext->ymin = ymin;
ext->ymax = ymax;
lv_chart_refresh(chart);
}
/**
* Set a new type for a chart
* @param chart pointer to a chart object
* @param type new type of the chart (from 'lv_chart_type_t' enum)
*/
void lv_chart_set_type(lv_obj_t * chart, lv_chart_type_t type)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
if(ext->type == type) return;
ext->type = type;
lv_chart_refresh(chart);
}
/**
* Set the number of points on a data line on a chart
* @param chart pointer r to chart object
* @param point_cnt new number of points on the data lines
*/
void lv_chart_set_point_count(lv_obj_t * chart, uint16_t point_cnt)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
if(ext->point_cnt == point_cnt) return;
lv_chart_series_t * ser;
uint16_t point_cnt_old = ext->point_cnt;
uint16_t i;
lv_coord_t def = LV_CHART_POINT_DEF;
if(point_cnt < 1) point_cnt = 1;
LL_READ_BACK(ext->series_ll, ser) {
if(ser->start_point != 0) {
lv_coord_t * new_points = lv_mem_alloc(sizeof(lv_coord_t) * point_cnt);
lv_mem_assert(new_points);
if(new_points == NULL) return;
if(point_cnt >= point_cnt_old) {
for(i = 0; i < point_cnt_old; i++) {
new_points[i] = ser->points[(i + ser->start_point) % point_cnt_old]; /*Copy old contents to new array*/
}
for(i = point_cnt_old; i < point_cnt; i++) {
new_points[i] = def; /*Fill up the rest with default value*/
}
} else {
for(i = 0; i < point_cnt; i++) {
new_points[i] = ser->points[(i + ser->start_point) % point_cnt_old]; /*Copy old contents to new array*/
}
}
/*Switch over pointer from old to new*/
lv_mem_free(ser->points);
ser->points = new_points;
} else {
ser->points = lv_mem_realloc(ser->points, sizeof(lv_coord_t) * point_cnt);
lv_mem_assert(ser->points);
if(ser->points == NULL) return;
/*Initialize the new points*/
if(point_cnt > point_cnt_old) {
for(i = point_cnt_old - 1; i < point_cnt; i++) {
ser->points[i] = def;
}
}
}
ser->start_point = 0;
}
ext->point_cnt = point_cnt;
lv_chart_refresh(chart);
}
/**
* Set the opacity of the data series
* @param chart pointer to a chart object
* @param opa opacity of the data series
*/
void lv_chart_set_series_opa(lv_obj_t * chart, lv_opa_t opa)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
if(ext->series.opa == opa) return;
ext->series.opa = opa;
lv_obj_invalidate(chart);
}
/**
* Set the line width or point radius of the data series
* @param chart pointer to a chart object
* @param width the new width
*/
void lv_chart_set_series_width(lv_obj_t * chart, lv_coord_t width)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
if(ext->series.width == width) return;
ext->series.width = width;
lv_obj_invalidate(chart);
}
/**
* Set the dark effect on the bottom of the points or columns
* @param chart pointer to a chart object
* @param dark_eff dark effect level (LV_OPA_TRANSP to turn off)
*/
void lv_chart_set_series_darking(lv_obj_t * chart, lv_opa_t dark_eff)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
if(ext->series.dark == dark_eff) return;
ext->series.dark = dark_eff;
lv_obj_invalidate(chart);
}
/**
* Initialize all data points with a value
* @param chart pointer to chart object
* @param ser pointer to a data series on 'chart'
* @param y the new value for all points
*/
void lv_chart_init_points(lv_obj_t * chart, lv_chart_series_t * ser, lv_coord_t y)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
uint16_t i;
for(i = 0; i < ext->point_cnt; i++) {
ser->points[i] = y;
}
ser->start_point = 0;
lv_chart_refresh(chart);
}
/**
* Set the value s of points from an array
* @param chart pointer to chart object
* @param ser pointer to a data series on 'chart'
* @param y_array array of 'lv_coord_t' points (with 'points count' elements )
*/
void lv_chart_set_points(lv_obj_t * chart, lv_chart_series_t * ser, lv_coord_t * y_array)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
memcpy(ser->points, y_array, ext->point_cnt * (sizeof(lv_coord_t)));
ser->start_point = 0;
lv_chart_refresh(chart);
}
/**
* Shift all data left and set the rightmost data on a data line
* @param chart pointer to chart object
* @param ser pointer to a data series on 'chart'
* @param y the new value of the rightmost data
*/
void lv_chart_set_next(lv_obj_t * chart, lv_chart_series_t * ser, lv_coord_t y)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
ser->points[ser->start_point] = y; /*This was the place of the former left most value, after shifting it is the rightmost*/
ser->start_point = (ser->start_point + 1) % ext->point_cnt;
lv_chart_refresh(chart);
}
/*=====================
* Getter functions
*====================*/
/**
* Get the type of a chart
* @param chart pointer to chart object
* @return type of the chart (from 'lv_chart_t' enum)
*/
lv_chart_type_t lv_chart_get_type(const lv_obj_t * chart)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
return ext->type;
}
/**
* Get the data point number per data line on chart
* @param chart pointer to chart object
* @return point number on each data line
*/
uint16_t lv_chart_get_point_cnt(const lv_obj_t * chart)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
return ext->point_cnt;
}
/**
* Get the opacity of the data series
* @param chart pointer to chart object
* @return the opacity of the data series
*/
lv_opa_t lv_chart_get_series_opa(const lv_obj_t * chart)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
return ext->series.opa;
}
/**
* Get the data series width
* @param chart pointer to chart object
* @return the width the data series (lines or points)
*/
lv_coord_t lv_chart_get_series_width(const lv_obj_t * chart)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
return ext->series.width;
}
/**
* Get the dark effect level on the bottom of the points or columns
* @param chart pointer to chart object
* @return dark effect level (LV_OPA_TRANSP to turn off)
*/
lv_opa_t lv_chart_get_series_darking(const lv_obj_t * chart)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
return ext->series.dark;
}
/*=====================
* Other functions
*====================*/
/**
* Refresh a chart if its data line has changed
* @param chart pointer to chart object
*/
void lv_chart_refresh(lv_obj_t * chart)
{
lv_obj_invalidate(chart);
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Handle the drawing related tasks of the chart backgrounds
* @param chart 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_chart_design(lv_obj_t * chart, const lv_area_t * mask, lv_design_mode_t mode)
{
if(mode == LV_DESIGN_COVER_CHK) {
/*Return false if the object is not covers the mask_p area*/
return ancestor_design_f(chart, mask, mode);
} else if(mode == LV_DESIGN_DRAW_MAIN) {
/*Draw the background*/
lv_draw_rect(&chart->coords, mask, lv_obj_get_style(chart), lv_obj_get_opa_scale(chart));
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
lv_chart_draw_div(chart, mask);
if(ext->type & LV_CHART_TYPE_LINE) lv_chart_draw_lines(chart, mask);
if(ext->type & LV_CHART_TYPE_COLUMN) lv_chart_draw_cols(chart, mask);
if(ext->type & LV_CHART_TYPE_POINT) lv_chart_draw_points(chart, mask);
if(ext->type & LV_CHART_TYPE_VERTICAL_LINE) lv_chart_draw_vertical_lines(chart, mask);
}
return true;
}
/**
* Signal function of the chart background
* @param chart pointer to a chart background object
* @param sign a signal type from lv_signal_t enum
* @param param pointer to a signal specific variable
*/
static lv_res_t lv_chart_signal(lv_obj_t * chart, lv_signal_t sign, void * param)
{
lv_res_t res;
/* Include the ancient signal function */
res = ancestor_signal(chart, sign, param);
if(res != LV_RES_OK) return res;
if(sign == LV_SIGNAL_CLEANUP) {
lv_coord_t ** datal;
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
LL_READ(ext->series_ll, datal) {
lv_mem_free(*datal);
}
lv_ll_clear(&ext->series_ll);
} 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_chart";
}
return res;
}
/**
* Draw the division lines on chart background
* @param chart pointer to chart object
* @param mask mask, inherited from the design function
*/
static void lv_chart_draw_div(lv_obj_t * chart, const lv_area_t * mask)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
lv_style_t * style = lv_obj_get_style(chart);
lv_opa_t opa_scale = lv_obj_get_opa_scale(chart);
uint8_t div_i;
uint8_t div_i_end;
uint8_t div_i_start;
lv_point_t p1;
lv_point_t p2;
lv_coord_t w = lv_obj_get_width(chart);
lv_coord_t h = lv_obj_get_height(chart);
lv_coord_t x_ofs = chart->coords.x1;
lv_coord_t y_ofs = chart->coords.y1;
if(ext->hdiv_cnt != 0) {
/*Draw slide lines if no border*/
if(style->body.border.width != 0) {
div_i_start = 1;
div_i_end = ext->hdiv_cnt;
} else {
div_i_start = 0;
div_i_end = ext->hdiv_cnt + 1;
}
p1.x = 0 + x_ofs;
p2.x = w + x_ofs;
for(div_i = div_i_start; div_i <= div_i_end; div_i++) {
p1.y = (int32_t)((int32_t)h * div_i) / (ext->hdiv_cnt + 1);
p1.y += y_ofs;
if(div_i == div_i_start) p1.y += (style->line.width >> 1) + 1; /*The first line might not be visible*/
if(div_i == div_i_end) p1.y -= (style->line.width >> 1) + 1; /*The last line might not be visible*/
p2.y = p1.y;
lv_draw_line(&p1, &p2, mask, style, opa_scale);
}
}
if(ext->vdiv_cnt != 0) {
/*Draw slide lines if no border*/
if(style->body.border.width != 0) {
div_i_start = 1;
div_i_end = ext->vdiv_cnt;
} else {
div_i_start = 0;
div_i_end = ext->vdiv_cnt + 1;
}
p1.y = 0 + y_ofs;
p2.y = h + y_ofs;
for(div_i = div_i_start; div_i <= div_i_end; div_i ++) {
p1.x = (int32_t)((int32_t)w * div_i) / (ext->vdiv_cnt + 1);
p1.x += x_ofs;
if(div_i == div_i_start) p1.x += (style->line.width >> 1) + 1; /*The first line might not be visible*/
if(div_i == div_i_end) p1.x -= (style->line.width >> 1) + 1; /*The last line might not be visible*/
p2.x = p1.x;
lv_draw_line(&p1, &p2, mask, style, opa_scale);
}
}
}
/**
* Draw the data lines as lines on a chart
* @param obj pointer to chart object
*/
static void lv_chart_draw_lines(lv_obj_t * chart, const lv_area_t * mask)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
uint16_t i;
lv_point_t p1;
lv_point_t p2;
lv_coord_t w = lv_obj_get_width(chart);
lv_coord_t h = lv_obj_get_height(chart);
lv_coord_t x_ofs = chart->coords.x1;
lv_coord_t y_ofs = chart->coords.y1;
int32_t y_tmp;
lv_coord_t p_prev;
lv_coord_t p_act;
lv_chart_series_t * ser;
lv_opa_t opa_scale = lv_obj_get_opa_scale(chart);
lv_style_t style;
lv_style_copy(&style, &lv_style_plain);
style.line.opa = ext->series.opa;
style.line.width = ext->series.width;
/*Go through all data lines*/
LL_READ_BACK(ext->series_ll, ser) {
style.line.color = ser->color;
p1.x = 0 + x_ofs;
p2.x = 0 + x_ofs;
p_prev = ser->start_point;
y_tmp = (int32_t)((int32_t) ser->points[p_prev] - ext->ymin) * h;
y_tmp = y_tmp / (ext->ymax - ext->ymin);
p2.y = h - y_tmp + y_ofs;
for(i = 1; i < ext->point_cnt; i ++) {
p1.x = p2.x;
p1.y = p2.y;
p2.x = ((w * i) / (ext->point_cnt - 1)) + x_ofs;
p_act = (ser->start_point + i) % ext->point_cnt;
y_tmp = (int32_t)((int32_t) ser->points[p_act] - ext->ymin) * h;
y_tmp = y_tmp / (ext->ymax - ext->ymin);
p2.y = h - y_tmp + y_ofs;
if(ser->points[p_prev] != LV_CHART_POINT_DEF && ser->points[p_act] != LV_CHART_POINT_DEF)
lv_draw_line(&p1, &p2, mask, &style, opa_scale);
p_prev = p_act;
}
}
}
/**
* Draw the data lines as points on a chart
* @param chart pointer to chart object
* @param mask mask, inherited from the design function
*/
static void lv_chart_draw_points(lv_obj_t * chart, const lv_area_t * mask)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
uint16_t i;
lv_area_t cir_a;
lv_coord_t w = lv_obj_get_width(chart);
lv_coord_t h = lv_obj_get_height(chart);
lv_coord_t x_ofs = chart->coords.x1;
lv_coord_t y_ofs = chart->coords.y1;
int32_t y_tmp;
lv_coord_t p_act;
lv_chart_series_t * ser;
uint8_t series_cnt = 0;
lv_style_t style_point;
lv_style_copy(&style_point, &lv_style_plain);
style_point.body.border.width = 0;
style_point.body.empty = 0;
style_point.body.radius = LV_RADIUS_CIRCLE;
style_point.body.opa = ext->series.opa;
style_point.body.radius = ext->series.width;
/*Go through all data lines*/
LL_READ_BACK(ext->series_ll, ser) {
style_point.body.main_color = ser->color;
style_point.body.grad_color = lv_color_mix(LV_COLOR_BLACK, ser->color, ext->series.dark);
for(i = 0; i < ext->point_cnt; i ++) {
cir_a.x1 = ((w * i) / (ext->point_cnt - 1)) + x_ofs;
cir_a.x2 = cir_a.x1 + style_point.body.radius;
cir_a.x1 -= style_point.body.radius;
p_act = (ser->start_point + i) % ext->point_cnt;
y_tmp = (int32_t)((int32_t) ser->points[p_act] - ext->ymin) * h;
y_tmp = y_tmp / (ext->ymax - ext->ymin);
cir_a.y1 = h - y_tmp + y_ofs;
cir_a.y2 = cir_a.y1 + style_point.body.radius;
cir_a.y1 -= style_point.body.radius;
if(ser->points[p_act] != LV_CHART_POINT_DEF)
lv_draw_rect(&cir_a, mask, &style_point, lv_obj_get_opa_scale(chart));
}
series_cnt++;
}
}
/**
* Draw the data lines as columns on a chart
* @param chart pointer to chart object
* @param mask mask, inherited from the design function
*/
static void lv_chart_draw_cols(lv_obj_t * chart, const lv_area_t * mask)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
uint16_t i;
lv_area_t col_a;
lv_area_t col_mask;
bool mask_ret;
lv_coord_t w = lv_obj_get_width(chart);
lv_coord_t h = lv_obj_get_height(chart);
int32_t y_tmp;
lv_chart_series_t * ser;
lv_style_t rects;
lv_coord_t col_w = w / ((ext->series.num + 1) * ext->point_cnt); /* Suppose + 1 series as separator*/
lv_coord_t x_ofs = col_w / 2; /*Shift with a half col.*/
lv_style_copy(&rects, &lv_style_plain);
rects.body.border.width = 0;
rects.body.empty = 0;
rects.body.radius = 0;
rects.body.opa = ext->series.opa;
col_a.y2 = chart->coords.y2;
lv_coord_t x_act;
/*Go through all points*/
for(i = 0; i < ext->point_cnt; i ++) {
x_act = (int32_t)((int32_t) w * i) / ext->point_cnt;
x_act += chart->coords.x1 + x_ofs;
/*Draw the current point of all data line*/
LL_READ_BACK(ext->series_ll, ser) {
rects.body.main_color = ser->color;
rects.body.grad_color = lv_color_mix(LV_COLOR_BLACK, ser->color, ext->series.dark);
col_a.x1 = x_act;
col_a.x2 = col_a.x1 + col_w;
x_act += col_w;
lv_coord_t p_act = (ser->start_point + i) % ext->point_cnt;
y_tmp = (int32_t)((int32_t) ser->points[p_act] - ext->ymin) * h;
y_tmp = y_tmp / (ext->ymax - ext->ymin);
col_a.y1 = h - y_tmp + chart->coords.y1;
mask_ret = lv_area_intersect(&col_mask, mask, &col_a);
if(mask_ret != false && ser->points[p_act] != LV_CHART_POINT_DEF) {
lv_draw_rect(&chart->coords, &col_mask, &rects, lv_obj_get_opa_scale(chart));
}
}
}
}
/**
* Draw the data lines as vertical lines on a chart if there is only 1px between point
* @param obj pointer to chart object
*/
static void lv_chart_draw_vertical_lines(lv_obj_t * chart, const lv_area_t * mask)
{
lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
lv_coord_t w = lv_obj_get_width(chart);
/*Vertical lines works only if the width == point count. Else use the normal line type*/
if(ext->point_cnt != w) {
lv_chart_draw_lines(chart, mask);
return;
}
uint16_t i;
lv_point_t p1;
lv_point_t p2;
lv_coord_t h = lv_obj_get_height(chart);
lv_coord_t x_ofs = chart->coords.x1;
lv_coord_t y_ofs = chart->coords.y1;
int32_t y_tmp;
lv_chart_series_t * ser;
lv_opa_t opa_scale = lv_obj_get_opa_scale(chart);
lv_style_t style;
lv_style_copy(&style, &lv_style_plain);
style.line.opa = ext->series.opa;
style.line.width = ext->series.width;
/*Go through all data lines*/
LL_READ_BACK(ext->series_ll, ser) {
style.line.color = ser->color;
p1.x = 0 + x_ofs;
p2.x = 0 + x_ofs;
y_tmp = (int32_t)((int32_t) ser->points[0] - ext->ymin) * h;
y_tmp = y_tmp / (ext->ymax - ext->ymin);
p2.y = h - y_tmp + y_ofs;
p1.y = p2.y;
for(i = 0; i < ext->point_cnt; i++)
{
y_tmp = (int32_t)((int32_t) ser->points[i] - ext->ymin) * h;
y_tmp = y_tmp / (ext->ymax - ext->ymin);
p2.y = h - y_tmp + y_ofs;
if(p1.y == p2.y)
{
p2.x++;
}
if(ser->points[i] != LV_CHART_POINT_DEF) {
lv_draw_line(&p1, &p2, mask, &style, opa_scale);
}
p2.x = ((w * i) / (ext->point_cnt - 1)) + x_ofs;
p1.x = p2.x;
p1.y = p2.y;
}
}
}
#endif
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