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This commit is contained in:
Willem Oldemans
2022-01-31 15:38:41 +01:00
commit 45be808d85
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include/README Normal file
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This directory is intended for project header files.
A header file is a file containing C declarations and macro definitions
to be shared between several project source files. You request the use of a
header file in your project source file (C, C++, etc) located in `src` folder
by including it, with the C preprocessing directive `#include'.
```src/main.c
#include "header.h"
int main (void)
{
...
}
```
Including a header file produces the same results as copying the header file
into each source file that needs it. Such copying would be time-consuming
and error-prone. With a header file, the related declarations appear
in only one place. If they need to be changed, they can be changed in one
place, and programs that include the header file will automatically use the
new version when next recompiled. The header file eliminates the labor of
finding and changing all the copies as well as the risk that a failure to
find one copy will result in inconsistencies within a program.
In C, the usual convention is to give header files names that end with `.h'.
It is most portable to use only letters, digits, dashes, and underscores in
header file names, and at most one dot.
Read more about using header files in official GCC documentation:
* Include Syntax
* Include Operation
* Once-Only Headers
* Computed Includes
https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

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include/Widgets/meter/lv_meter.c Normal file
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/**
* @file lv_meter.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_meter.h"
#if LV_USE_METER != 0
#include "../../../misc/lv_assert.h"
/*********************
* DEFINES
*********************/
#define MY_CLASS &lv_meter_class
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void lv_meter_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
static void lv_meter_destructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
static void lv_meter_event(const lv_obj_class_t * class_p, lv_event_t * e);
static void draw_arcs(lv_obj_t * obj, lv_draw_ctx_t * draw_ctx, const lv_area_t * scale_area);
static void draw_ticks_and_labels(lv_obj_t * obj, lv_draw_ctx_t * draw_ctx, const lv_area_t * scale_area);
static void draw_needles(lv_obj_t * obj, lv_draw_ctx_t * draw_ctx, const lv_area_t * scale_area);
static void inv_arc(lv_obj_t * obj, lv_meter_indicator_t * indic, int32_t old_value, int32_t new_value);
static void inv_line(lv_obj_t * obj, lv_meter_indicator_t * indic, int32_t value);
/**********************
* STATIC VARIABLES
**********************/
const lv_obj_class_t lv_meter_class = {
.constructor_cb = lv_meter_constructor,
.destructor_cb = lv_meter_destructor,
.event_cb = lv_meter_event,
.instance_size = sizeof(lv_meter_t),
.base_class = &lv_obj_class
};
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
lv_obj_t * lv_meter_create(lv_obj_t * parent)
{
LV_LOG_INFO("begin");
lv_obj_t * obj = lv_obj_class_create_obj(MY_CLASS, parent);
lv_obj_class_init_obj(obj);
return obj;
}
/*=====================
* Add scale
*====================*/
lv_meter_scale_t * lv_meter_add_scale(lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_meter_t * meter = (lv_meter_t *)obj;
lv_meter_scale_t * scale = _lv_ll_ins_head(&meter->scale_ll);
LV_ASSERT_MALLOC(scale);
lv_memset_00(scale, sizeof(lv_meter_scale_t));
scale->angle_range = 270;
scale->rotation = 90 + (360 - scale->angle_range) / 2;
scale->min = 0;
scale->max = 100;
scale->tick_cnt = 6;
scale->tick_length = 8;
scale->tick_width = 2;
scale->label_gap = 2;
return scale;
}
void lv_meter_set_scale_ticks(lv_obj_t * obj, lv_meter_scale_t * scale, uint16_t cnt, uint16_t width, uint16_t len,
lv_color_t color)
{
scale->tick_cnt = cnt;
scale->tick_width = width;
scale->tick_length = len;
scale->tick_color = color;
lv_obj_invalidate(obj);
}
void lv_meter_set_scale_major_ticks(lv_obj_t * obj, lv_meter_scale_t * scale, uint16_t nth, uint16_t width,
uint16_t len, lv_color_t color, int16_t label_gap)
{
scale->tick_major_nth = nth;
scale->tick_major_width = width;
scale->tick_major_length = len;
scale->tick_major_color = color;
scale->label_gap = label_gap;
lv_obj_invalidate(obj);
}
void lv_meter_set_scale_range(lv_obj_t * obj, lv_meter_scale_t * scale, int32_t min, int32_t max, uint32_t angle_range,
uint32_t rotation)
{
scale->min = min;
scale->max = max;
scale->angle_range = angle_range;
scale->rotation = rotation;
lv_obj_invalidate(obj);
}
/*=====================
* Add indicator
*====================*/
lv_meter_indicator_t * lv_meter_add_needle_line(lv_obj_t * obj, lv_meter_scale_t * scale, uint16_t width,
lv_color_t color, int16_t r_mod)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_meter_t * meter = (lv_meter_t *)obj;
lv_meter_indicator_t * indic = _lv_ll_ins_head(&meter->indicator_ll);
LV_ASSERT_MALLOC(indic);
lv_memset_00(indic, sizeof(lv_meter_indicator_t));
indic->scale = scale;
indic->opa = LV_OPA_COVER;
indic->type = LV_METER_INDICATOR_TYPE_NEEDLE_LINE;
indic->type_data.needle_line.width = width;
indic->type_data.needle_line.color = color;
indic->type_data.needle_line.r_mod = r_mod;
lv_obj_invalidate(obj);
return indic;
}
lv_meter_indicator_t * lv_meter_add_needle_img(lv_obj_t * obj, lv_meter_scale_t * scale, const void * src,
lv_coord_t pivot_x, lv_coord_t pivot_y)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_meter_t * meter = (lv_meter_t *)obj;
lv_meter_indicator_t * indic = _lv_ll_ins_head(&meter->indicator_ll);
LV_ASSERT_MALLOC(indic);
lv_memset_00(indic, sizeof(lv_meter_indicator_t));
indic->scale = scale;
indic->opa = LV_OPA_COVER;
indic->type = LV_METER_INDICATOR_TYPE_NEEDLE_IMG;
indic->type_data.needle_img.src = src;
indic->type_data.needle_img.pivot.x = pivot_x;
indic->type_data.needle_img.pivot.y = pivot_y;
lv_obj_invalidate(obj);
return indic;
}
lv_meter_indicator_t * lv_meter_add_arc(lv_obj_t * obj, lv_meter_scale_t * scale, uint16_t width, lv_color_t color,
int16_t r_mod)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_meter_t * meter = (lv_meter_t *)obj;
lv_meter_indicator_t * indic = _lv_ll_ins_head(&meter->indicator_ll);
LV_ASSERT_MALLOC(indic);
lv_memset_00(indic, sizeof(lv_meter_indicator_t));
indic->scale = scale;
indic->opa = LV_OPA_COVER;
indic->type = LV_METER_INDICATOR_TYPE_ARC;
indic->type_data.arc.width = width;
indic->type_data.arc.color = color;
indic->type_data.arc.r_mod = r_mod;
lv_obj_invalidate(obj);
return indic;
}
lv_meter_indicator_t * lv_meter_add_scale_lines(lv_obj_t * obj, lv_meter_scale_t * scale, lv_color_t color_start,
lv_color_t color_end, bool local, int16_t width_mod)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_meter_t * meter = (lv_meter_t *)obj;
lv_meter_indicator_t * indic = _lv_ll_ins_head(&meter->indicator_ll);
LV_ASSERT_MALLOC(indic);
lv_memset_00(indic, sizeof(lv_meter_indicator_t));
indic->scale = scale;
indic->opa = LV_OPA_COVER;
indic->type = LV_METER_INDICATOR_TYPE_SCALE_LINES;
indic->type_data.scale_lines.color_start = color_start;
indic->type_data.scale_lines.color_end = color_end;
indic->type_data.scale_lines.local_grad = local;
indic->type_data.scale_lines.width_mod = width_mod;
lv_obj_invalidate(obj);
return indic;
}
/*=====================
* Set indicator value
*====================*/
void lv_meter_set_indicator_value(lv_obj_t * obj, lv_meter_indicator_t * indic, int32_t value)
{
int32_t old_start = indic->start_value;
int32_t old_end = indic->end_value;
indic->start_value = value;
indic->end_value = value;
if(indic->type == LV_METER_INDICATOR_TYPE_ARC) {
inv_arc(obj, indic, old_start, value);
inv_arc(obj, indic, old_end, value);
}
else if(indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_IMG || indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_LINE) {
inv_line(obj, indic, old_start);
inv_line(obj, indic, old_end);
inv_line(obj, indic, value);
}
else {
lv_obj_invalidate(obj);
}
}
void lv_meter_set_indicator_start_value(lv_obj_t * obj, lv_meter_indicator_t * indic, int32_t value)
{
int32_t old_value = indic->start_value;
indic->start_value = value;
if(indic->type == LV_METER_INDICATOR_TYPE_ARC) {
inv_arc(obj, indic, old_value, value);
}
else if(indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_IMG || indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_LINE) {
inv_line(obj, indic, old_value);
inv_line(obj, indic, value);
}
else {
lv_obj_invalidate(obj);
}
}
void lv_meter_set_indicator_end_value(lv_obj_t * obj, lv_meter_indicator_t * indic, int32_t value)
{
int32_t old_value = indic->end_value;
indic->end_value = value;
if(indic->type == LV_METER_INDICATOR_TYPE_ARC) {
inv_arc(obj, indic, old_value, value);
}
else if(indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_IMG || indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_LINE) {
inv_line(obj, indic, old_value);
inv_line(obj, indic, value);
}
else {
lv_obj_invalidate(obj);
}
}
/**********************
* STATIC FUNCTIONS
**********************/
static void lv_meter_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
{
LV_UNUSED(class_p);
LV_TRACE_OBJ_CREATE("begin");
lv_meter_t * meter = (lv_meter_t *)obj;
_lv_ll_init(&meter->scale_ll, sizeof(lv_meter_scale_t));
_lv_ll_init(&meter->indicator_ll, sizeof(lv_meter_indicator_t));
LV_TRACE_OBJ_CREATE("finished");
}
static void lv_meter_destructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
{
LV_UNUSED(class_p);
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_meter_t * meter = (lv_meter_t *)obj;
_lv_ll_clear(&meter->indicator_ll);
_lv_ll_clear(&meter->scale_ll);
}
static void lv_meter_event(const lv_obj_class_t * class_p, lv_event_t * e)
{
LV_UNUSED(class_p);
lv_res_t res = lv_obj_event_base(MY_CLASS, e);
if(res != LV_RES_OK) return;
lv_event_code_t code = lv_event_get_code(e);
lv_obj_t * obj = lv_event_get_target(e);
if(code == LV_EVENT_DRAW_MAIN) {
lv_draw_ctx_t * draw_ctx = lv_event_get_draw_ctx(e);
lv_area_t scale_area;
lv_obj_get_content_coords(obj, &scale_area);
draw_arcs(obj, draw_ctx, &scale_area);
draw_ticks_and_labels(obj, draw_ctx, &scale_area);
draw_needles(obj, draw_ctx, &scale_area);
lv_coord_t r_edge = lv_area_get_width(&scale_area) / 2;
lv_point_t scale_center;
scale_center.x = scale_area.x1 + r_edge;
scale_center.y = scale_area.y1 + r_edge;
lv_draw_rect_dsc_t mid_dsc;
lv_draw_rect_dsc_init(&mid_dsc);
lv_obj_init_draw_rect_dsc(obj, LV_PART_INDICATOR, &mid_dsc);
lv_coord_t w = lv_obj_get_style_width(obj, LV_PART_INDICATOR) / 2;
lv_coord_t h = lv_obj_get_style_height(obj, LV_PART_INDICATOR) / 2;
lv_area_t nm_cord;
nm_cord.x1 = scale_center.x - w;
nm_cord.y1 = scale_center.y - h;
nm_cord.x2 = scale_center.x + w;
nm_cord.y2 = scale_center.y + h;
lv_draw_rect(draw_ctx, &mid_dsc, &nm_cord);
}
}
static void draw_arcs(lv_obj_t * obj, lv_draw_ctx_t * draw_ctx, const lv_area_t * scale_area)
{
lv_meter_t * meter = (lv_meter_t *)obj;
lv_draw_arc_dsc_t arc_dsc;
lv_draw_arc_dsc_init(&arc_dsc);
arc_dsc.rounded = lv_obj_get_style_arc_rounded(obj, LV_PART_ITEMS);
lv_coord_t r_out = lv_area_get_width(scale_area) / 2 ;
lv_point_t scale_center;
scale_center.x = scale_area->x1 + r_out;
scale_center.y = scale_area->y1 + r_out;
lv_opa_t opa_main = lv_obj_get_style_opa(obj, LV_PART_MAIN);
lv_meter_indicator_t * indic;
lv_obj_draw_part_dsc_t part_draw_dsc;
lv_obj_draw_dsc_init(&part_draw_dsc, draw_ctx);
part_draw_dsc.arc_dsc = &arc_dsc;
part_draw_dsc.part = LV_PART_INDICATOR;
part_draw_dsc.class_p = MY_CLASS;
part_draw_dsc.type = LV_METER_DRAW_PART_ARC;
_LV_LL_READ_BACK(&meter->indicator_ll, indic) {
if(indic->type != LV_METER_INDICATOR_TYPE_ARC) continue;
arc_dsc.color = indic->type_data.arc.color;
arc_dsc.width = indic->type_data.arc.width;
arc_dsc.opa = indic->opa > LV_OPA_MAX ? opa_main : (opa_main * indic->opa) >> 8;
lv_meter_scale_t * scale = indic->scale;
int32_t start_angle = lv_map(indic->start_value, scale->min, scale->max, scale->rotation,
scale->rotation + scale->angle_range);
int32_t end_angle = lv_map(indic->end_value, scale->min, scale->max, scale->rotation,
scale->rotation + scale->angle_range);
part_draw_dsc.radius = r_out + indic->type_data.arc.r_mod;
part_draw_dsc.sub_part_ptr = indic;
part_draw_dsc.p1 = &scale_center;
lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc);
lv_draw_arc(draw_ctx, &arc_dsc, &scale_center, part_draw_dsc.radius, start_angle, end_angle);
lv_event_send(obj, LV_EVENT_DRAW_PART_END, &part_draw_dsc);
}
}
static void draw_ticks_and_labels(lv_obj_t * obj, lv_draw_ctx_t * draw_ctx, const lv_area_t * scale_area)
{
lv_meter_t * meter = (lv_meter_t *)obj;
lv_point_t p_center;
lv_coord_t r_edge = LV_MIN(lv_area_get_width(scale_area) / 2, lv_area_get_height(scale_area) / 2);
p_center.x = scale_area->x1 + r_edge;
p_center.y = scale_area->y1 + r_edge;
uint8_t i;
lv_draw_line_dsc_t line_dsc;
lv_draw_line_dsc_init(&line_dsc);
lv_obj_init_draw_line_dsc(obj, LV_PART_TICKS, &line_dsc);
line_dsc.raw_end = 1;
lv_draw_label_dsc_t label_dsc;
lv_draw_label_dsc_init(&label_dsc);
lv_obj_init_draw_label_dsc(obj, LV_PART_TICKS, &label_dsc);
lv_meter_scale_t * scale;
lv_draw_mask_radius_param_t inner_minor_mask;
lv_draw_mask_radius_param_t inner_major_mask;
lv_draw_mask_radius_param_t outer_mask;
lv_obj_draw_part_dsc_t part_draw_dsc;
lv_obj_draw_dsc_init(&part_draw_dsc, draw_ctx);
part_draw_dsc.class_p = MY_CLASS;
part_draw_dsc.part = LV_PART_TICKS;
part_draw_dsc.type = LV_METER_DRAW_PART_TICK;
part_draw_dsc.line_dsc = &line_dsc;
_LV_LL_READ_BACK(&meter->scale_ll, scale) {
part_draw_dsc.sub_part_ptr = scale;
lv_coord_t r_out = r_edge + scale->r_mod;
lv_coord_t r_in_minor = r_out - scale->tick_length;
lv_coord_t r_in_major = r_out - scale->tick_major_length;
lv_area_t area_inner_minor;
area_inner_minor.x1 = p_center.x - r_in_minor;
area_inner_minor.y1 = p_center.y - r_in_minor;
area_inner_minor.x2 = p_center.x + r_in_minor;
area_inner_minor.y2 = p_center.y + r_in_minor;
lv_draw_mask_radius_init(&inner_minor_mask, &area_inner_minor, LV_RADIUS_CIRCLE, true);
lv_area_t area_inner_major;
area_inner_major.x1 = p_center.x - r_in_major;
area_inner_major.y1 = p_center.y - r_in_major;
area_inner_major.x2 = p_center.x + r_in_major - 1;
area_inner_major.y2 = p_center.y + r_in_major - 1;
lv_draw_mask_radius_init(&inner_major_mask, &area_inner_major, LV_RADIUS_CIRCLE, true);
lv_area_t area_outer;
area_outer.x1 = p_center.x - r_out;
area_outer.y1 = p_center.y - r_out;
area_outer.x2 = p_center.x + r_out - 1;
area_outer.y2 = p_center.y + r_out - 1;
lv_draw_mask_radius_init(&outer_mask, &area_outer, LV_RADIUS_CIRCLE, false);
int16_t outer_mask_id = lv_draw_mask_add(&outer_mask, NULL);
int16_t inner_act_mask_id = LV_MASK_ID_INV; /*Will be added later*/
uint32_t minor_cnt = scale->tick_major_nth ? scale->tick_major_nth - 1 : 0xFFFF;
for(i = 0; i < scale->tick_cnt; i++) {
minor_cnt++;
bool major = false;
if(minor_cnt == scale->tick_major_nth) {
minor_cnt = 0;
major = true;
}
int32_t value_of_line = lv_map(i, 0, scale->tick_cnt - 1, scale->min, scale->max);
part_draw_dsc.value = value_of_line;
lv_color_t line_color = major ? scale->tick_major_color : scale->tick_color;
lv_color_t line_color_ori = line_color;
lv_coord_t line_width_ori = major ? scale->tick_major_width : scale->tick_width;
lv_coord_t line_width = line_width_ori;
lv_meter_indicator_t * indic;
_LV_LL_READ_BACK(&meter->indicator_ll, indic) {
if(indic->type != LV_METER_INDICATOR_TYPE_SCALE_LINES) continue;
if(value_of_line >= indic->start_value && value_of_line <= indic->end_value) {
line_width += indic->type_data.scale_lines.width_mod;
if(indic->type_data.scale_lines.color_start.full == indic->type_data.scale_lines.color_end.full) {
line_color = indic->type_data.scale_lines.color_start;
}
else {
lv_opa_t ratio;
if(indic->type_data.scale_lines.local_grad) {
ratio = lv_map(value_of_line, indic->start_value, indic->end_value, LV_OPA_TRANSP, LV_OPA_COVER);
}
else {
ratio = lv_map(value_of_line, scale->min, scale->max, LV_OPA_TRANSP, LV_OPA_COVER);
}
line_color = lv_color_mix(indic->type_data.scale_lines.color_end, indic->type_data.scale_lines.color_start, ratio);
}
}
}
/*`* 256` for extra precision*/
int32_t angle_upscale = ((i * scale->angle_range) << 8) / (scale->tick_cnt - 1);
int32_t angle_low = (angle_upscale >> 8);
int32_t angle_high = angle_low + 1;
int32_t angle_rem = angle_upscale & 0xFF;
/*Interpolate sine and cos*/
int32_t sin_low = lv_trigo_sin(angle_low + scale->rotation);
int32_t sin_high = lv_trigo_sin(angle_high + scale->rotation);
int32_t sin_mid = (sin_low * (256 - angle_rem) + sin_high * angle_rem) >> 8;
int32_t cos_low = lv_trigo_cos(angle_low + scale->rotation);
int32_t cos_high = lv_trigo_cos(angle_high + scale->rotation);
int32_t cos_mid = (cos_low * (256 - angle_rem) + cos_high * angle_rem) >> 8;
line_dsc.color = line_color;
line_dsc.width = line_width;
/*Use the interpolated angle to get the outer x and y coordinates.
*Draw a little bit longer lines to be sure the mask will clip them correctly*/
lv_point_t p_outer;
p_outer.x = (int32_t)(((int32_t)cos_mid * (r_out + line_width) + 127) >> (LV_TRIGO_SHIFT)) + p_center.x;
p_outer.y = (int32_t)(((int32_t)sin_mid * (r_out + line_width) + 127) >> (LV_TRIGO_SHIFT)) + p_center.y;
part_draw_dsc.p1 = &p_outer;
part_draw_dsc.p1 = &p_center;
part_draw_dsc.id = i;
part_draw_dsc.label_dsc = &label_dsc;
/*Draw the text*/
if(major) {
lv_draw_mask_remove_id(outer_mask_id);
uint32_t r_text = r_in_major - scale->label_gap;
lv_point_t p;
p.x = (int32_t)((int32_t)((int32_t)cos_mid * r_text + 127) >> LV_TRIGO_SHIFT) + p_center.x;
p.y = (int32_t)((int32_t)((int32_t)sin_mid * r_text + 127) >> LV_TRIGO_SHIFT) + p_center.y;
lv_draw_label_dsc_t label_dsc_tmp;
lv_memcpy(&label_dsc_tmp, &label_dsc, sizeof(label_dsc_tmp));
part_draw_dsc.label_dsc = &label_dsc_tmp;
char buf[16];
lv_snprintf(buf, sizeof(buf), "%" LV_PRId32, value_of_line);
part_draw_dsc.text = buf;
lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc);
lv_point_t label_size;
lv_txt_get_size(&label_size, part_draw_dsc.text, label_dsc.font, label_dsc.letter_space, label_dsc.line_space,
LV_COORD_MAX, LV_TEXT_FLAG_NONE);
lv_area_t label_cord;
label_cord.x1 = p.x - label_size.x / 2;
label_cord.y1 = p.y - label_size.y / 2;
label_cord.x2 = label_cord.x1 + label_size.x;
label_cord.y2 = label_cord.y1 + label_size.y;
lv_draw_label(draw_ctx, part_draw_dsc.label_dsc, &label_cord, part_draw_dsc.text, NULL);
outer_mask_id = lv_draw_mask_add(&outer_mask, NULL);
}
else {
part_draw_dsc.label_dsc = NULL;
part_draw_dsc.text = NULL;
lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc);
}
inner_act_mask_id = lv_draw_mask_add(major ? &inner_major_mask : &inner_minor_mask, NULL);
lv_draw_line(draw_ctx, &line_dsc, &p_outer, &p_center);
lv_draw_mask_remove_id(inner_act_mask_id);
lv_event_send(obj, LV_EVENT_DRAW_MAIN_END, &part_draw_dsc);
line_dsc.color = line_color_ori;
line_dsc.width = line_width_ori;
}
lv_draw_mask_free_param(&inner_minor_mask);
lv_draw_mask_free_param(&inner_major_mask);
lv_draw_mask_free_param(&outer_mask);
lv_draw_mask_remove_id(outer_mask_id);
}
}
static void draw_needles(lv_obj_t * obj, lv_draw_ctx_t * draw_ctx, const lv_area_t * scale_area)
{
lv_meter_t * meter = (lv_meter_t *)obj;
lv_coord_t r_edge = lv_area_get_width(scale_area) / 2;
lv_point_t scale_center;
scale_center.x = scale_area->x1 + r_edge;
scale_center.y = scale_area->y1 + r_edge;
lv_draw_line_dsc_t line_dsc;
lv_draw_line_dsc_init(&line_dsc);
lv_obj_init_draw_line_dsc(obj, LV_PART_ITEMS, &line_dsc);
lv_draw_img_dsc_t img_dsc;
lv_draw_img_dsc_init(&img_dsc);
lv_obj_init_draw_img_dsc(obj, LV_PART_ITEMS, &img_dsc);
lv_opa_t opa_main = lv_obj_get_style_opa(obj, LV_PART_MAIN);
lv_obj_draw_part_dsc_t part_draw_dsc;
lv_obj_draw_dsc_init(&part_draw_dsc, draw_ctx);
part_draw_dsc.class_p = MY_CLASS;
part_draw_dsc.p1 = &scale_center;
lv_meter_indicator_t * indic;
_LV_LL_READ_BACK(&meter->indicator_ll, indic) {
lv_meter_scale_t * scale = indic->scale;
part_draw_dsc.sub_part_ptr = indic;
if(indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_LINE) {
int32_t angle = lv_map(indic->end_value, scale->min, scale->max, scale->rotation, scale->rotation + scale->angle_range);
lv_coord_t r_out = r_edge + scale->r_mod + indic->type_data.needle_line.r_mod;
lv_point_t p_end;
p_end.y = (lv_trigo_sin(angle) * (r_out)) / LV_TRIGO_SIN_MAX + scale_center.y;
p_end.x = (lv_trigo_cos(angle) * (r_out)) / LV_TRIGO_SIN_MAX + scale_center.x;
line_dsc.color = indic->type_data.needle_line.color;
line_dsc.width = indic->type_data.needle_line.width;
line_dsc.opa = indic->opa > LV_OPA_MAX ? opa_main : (opa_main * indic->opa) >> 8;
part_draw_dsc.id = LV_METER_DRAW_PART_NEEDLE_LINE;
part_draw_dsc.line_dsc = &line_dsc;
part_draw_dsc.p2 = &p_end;
lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc);
lv_draw_line(draw_ctx, &line_dsc, &scale_center, &p_end);
lv_event_send(obj, LV_EVENT_DRAW_PART_END, &part_draw_dsc);
}
else if(indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_IMG) {
if(indic->type_data.needle_img.src == NULL) continue;
int32_t angle = lv_map(indic->end_value, scale->min, scale->max, scale->rotation, scale->rotation + scale->angle_range);
lv_img_header_t info;
lv_img_decoder_get_info(indic->type_data.needle_img.src, &info);
lv_area_t a;
a.x1 = scale_center.x - indic->type_data.needle_img.pivot.x;
a.y1 = scale_center.y - indic->type_data.needle_img.pivot.y;
a.x2 = a.x1 + info.w - 1;
a.y2 = a.y1 + info.h - 1;
img_dsc.opa = indic->opa > LV_OPA_MAX ? opa_main : (opa_main * indic->opa) >> 8;
img_dsc.pivot.x = indic->type_data.needle_img.pivot.x;
img_dsc.pivot.y = indic->type_data.needle_img.pivot.y;
angle = angle * 10;
if(angle > 3600) angle -= 3600;
img_dsc.angle = angle;
part_draw_dsc.img_dsc = &img_dsc;
lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc);
lv_draw_img(draw_ctx, &img_dsc, &a, indic->type_data.needle_img.src);
lv_event_send(obj, LV_EVENT_DRAW_PART_END, &part_draw_dsc);
}
}
}
static void inv_arc(lv_obj_t * obj, lv_meter_indicator_t * indic, int32_t old_value, int32_t new_value)
{
bool rounded = lv_obj_get_style_arc_rounded(obj, LV_PART_ITEMS);
lv_area_t scale_area;
lv_obj_get_content_coords(obj, &scale_area);
lv_coord_t r_out = lv_area_get_width(&scale_area) / 2;
lv_point_t scale_center;
scale_center.x = scale_area.x1 + r_out;
scale_center.y = scale_area.y1 + r_out;
r_out += indic->type_data.arc.r_mod;
lv_meter_scale_t * scale = indic->scale;
int32_t start_angle = lv_map(old_value, scale->min, scale->max, scale->rotation, scale->angle_range + scale->rotation);
int32_t end_angle = lv_map(new_value, scale->min, scale->max, scale->rotation, scale->angle_range + scale->rotation);
lv_area_t a;
lv_draw_arc_get_area(scale_center.x, scale_center.y, r_out, LV_MIN(start_angle, end_angle), LV_MAX(start_angle,
end_angle), indic->type_data.arc.width, rounded, &a);
lv_obj_invalidate_area(obj, &a);
}
static void inv_line(lv_obj_t * obj, lv_meter_indicator_t * indic, int32_t value)
{
lv_area_t scale_area;
lv_obj_get_content_coords(obj, &scale_area);
lv_coord_t r_out = lv_area_get_width(&scale_area) / 2;
lv_point_t scale_center;
scale_center.x = scale_area.x1 + r_out;
scale_center.y = scale_area.y1 + r_out;
lv_meter_scale_t * scale = indic->scale;
if(indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_LINE) {
int32_t angle = lv_map(value, scale->min, scale->max, scale->rotation, scale->rotation + scale->angle_range);
r_out += scale->r_mod + indic->type_data.needle_line.r_mod;
lv_point_t p_end;
p_end.y = (lv_trigo_sin(angle) * (r_out)) / LV_TRIGO_SIN_MAX + scale_center.y;
p_end.x = (lv_trigo_cos(angle) * (r_out)) / LV_TRIGO_SIN_MAX + scale_center.x;
lv_area_t a;
a.x1 = LV_MIN(scale_center.x, p_end.x) - indic->type_data.needle_line.width - 2;
a.y1 = LV_MIN(scale_center.y, p_end.y) - indic->type_data.needle_line.width - 2;
a.x2 = LV_MAX(scale_center.x, p_end.x) + indic->type_data.needle_line.width + 2;
a.y2 = LV_MAX(scale_center.y, p_end.y) + indic->type_data.needle_line.width + 2;
lv_obj_invalidate_area(obj, &a);
}
else if(indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_IMG) {
int32_t angle = lv_map(value, scale->min, scale->max, scale->rotation, scale->rotation + scale->angle_range);
lv_img_header_t info;
lv_img_decoder_get_info(indic->type_data.needle_img.src, &info);
angle = angle * 10;
if(angle > 3600) angle -= 3600;
scale_center.x -= indic->type_data.needle_img.pivot.x;
scale_center.y -= indic->type_data.needle_img.pivot.y;
lv_area_t a;
_lv_img_buf_get_transformed_area(&a, info.w, info.h, angle, LV_IMG_ZOOM_NONE, &indic->type_data.needle_img.pivot);
a.x1 += scale_center.x - 2;
a.y1 += scale_center.y - 2;
a.x2 += scale_center.x + 2;
a.y2 += scale_center.y + 2;
lv_obj_invalidate_area(obj, &a);
}
}
#endif

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include/Widgets/meter/lv_meter.h Normal file
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/**
* @file lv_meter.h
*
*/
#ifndef LV_METER_H
#define LV_METER_H
#ifdef __cplusplus
extern "C" {
#endif
/*********************
* INCLUDES
*********************/
#include "lvgl.h"
#if LV_USE_METER != 0
/*Testing of dependencies*/
#if LV_DRAW_COMPLEX == 0
#error "lv_meter: Complex drawing is required. Enable it in lv_conf.h (LV_DRAW_COMPLEX 1)"
#endif
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
typedef struct {
lv_color_t tick_color;
uint16_t tick_cnt;
uint16_t tick_length;
uint16_t tick_width;
lv_color_t tick_major_color;
uint16_t tick_major_nth;
uint16_t tick_major_length;
uint16_t tick_major_width;
int16_t label_gap;
int16_t label_color;
int32_t min;
int32_t max;
int16_t r_mod;
uint16_t angle_range;
int16_t rotation;
} lv_meter_scale_t;
enum {
LV_METER_INDICATOR_TYPE_NEEDLE_IMG,
LV_METER_INDICATOR_TYPE_NEEDLE_LINE,
LV_METER_INDICATOR_TYPE_SCALE_LINES,
LV_METER_INDICATOR_TYPE_ARC,
};
typedef uint8_t lv_meter_indicator_type_t;
typedef struct {
lv_meter_scale_t * scale;
lv_meter_indicator_type_t type;
lv_opa_t opa;
int32_t start_value;
int32_t end_value;
union {
struct {
const void * src;
lv_point_t pivot;
} needle_img;
struct {
uint16_t width;
int16_t r_mod;
lv_color_t color;
} needle_line;
struct {
uint16_t width;
const void * src;
lv_color_t color;
int16_t r_mod;
} arc;
struct {
int16_t width_mod;
lv_color_t color_start;
lv_color_t color_end;
uint8_t local_grad : 1;
} scale_lines;
} type_data;
} lv_meter_indicator_t;
/*Data of line meter*/
typedef struct {
lv_obj_t obj;
lv_ll_t scale_ll;
lv_ll_t indicator_ll;
} lv_meter_t;
extern const lv_obj_class_t lv_meter_class;
/**
* `type` field in `lv_obj_draw_part_dsc_t` if `class_p = lv_meter_class`
* Used in `LV_EVENT_DRAW_PART_BEGIN` and `LV_EVENT_DRAW_PART_END`
*/
typedef enum {
LV_METER_DRAW_PART_ARC, /**< The arc indicator*/
LV_METER_DRAW_PART_NEEDLE_LINE, /**< The needle lines*/
LV_METER_DRAW_PART_NEEDLE_IMG, /**< The needle images*/
LV_METER_DRAW_PART_TICK, /**< The tick lines and labels*/
} lv_meter_draw_part_type_t;
/**********************
* GLOBAL PROTOTYPES
**********************/
/**
* Create a Meter object
* @param parent pointer to an object, it will be the parent of the new bar.
* @return pointer to the created meter
*/
lv_obj_t * lv_meter_create(lv_obj_t * parent);
/*=====================
* Add scale
*====================*/
/**
* Add a new scale to the meter.
* @param obj pointer to a meter object
* @return the new scale
* @note Indicators can be attached to scales.
*/
lv_meter_scale_t * lv_meter_add_scale(lv_obj_t * obj);
/**
* Set the properties of the ticks of a scale
* @param obj pointer to a meter object
* @param scale pointer to scale (added to `meter`)
* @param cnt number of tick lines
* @param width width of tick lines
* @param len length of tick lines
* @param color color of tick lines
*/
void lv_meter_set_scale_ticks(lv_obj_t * obj, lv_meter_scale_t * scale, uint16_t cnt, uint16_t width, uint16_t len,
lv_color_t color);
/**
* Make some "normal" ticks major ticks and set their attributes.
* Texts with the current value are also added to the major ticks.
* @param obj pointer to a meter object
* @param scale pointer to scale (added to `meter`)
* @param nth make every Nth normal tick major tick. (start from the first on the left)
* @param width width of the major ticks
* @param len length of the major ticks
* @param color color of the major ticks
* @param label_gap gap between the major ticks and the labels
*/
void lv_meter_set_scale_major_ticks(lv_obj_t * obj, lv_meter_scale_t * scale, uint16_t nth, uint16_t width,
uint16_t len, lv_color_t color, int16_t label_gap);
/**
* Set the value and angular range of a scale.
* @param obj pointer to a meter object
* @param scale pointer to scale (added to `meter`)
* @param min the minimum value
* @param max the maximal value
* @param angle_range the angular range of the scale
* @param rotation the angular offset from the 3 o'clock position (clock-wise)
*/
void lv_meter_set_scale_range(lv_obj_t * obj, lv_meter_scale_t * scale, int32_t min, int32_t max, uint32_t angle_range,
uint32_t rotation);
/*=====================
* Add indicator
*====================*/
/**
* Add a needle line indicator the scale
* @param obj pointer to a meter object
* @param scale pointer to scale (added to `meter`)
* @param width width of the line
* @param color color of the line
* @param r_mod the radius modifier (added to the scale's radius) to get the lines length
* @return the new indicator
*/
lv_meter_indicator_t * lv_meter_add_needle_line(lv_obj_t * obj, lv_meter_scale_t * scale, uint16_t width,
lv_color_t color, int16_t r_mod);
/**
* Add a needle image indicator the scale
* @param obj pointer to a meter object
* @param scale pointer to scale (added to `meter`)
* @param src the image source of the indicator. path or pointer to ::lv_img_dsc_t
* @param pivot_x the X pivot point of the needle
* @param pivot_y the Y pivot point of the needle
* @return the new indicator
* @note the needle image should point to the right, like -O----->
*/
lv_meter_indicator_t * lv_meter_add_needle_img(lv_obj_t * obj, lv_meter_scale_t * scale, const void * src,
lv_coord_t pivot_x, lv_coord_t pivot_y);
/**
* Add an arc indicator the scale
* @param obj pointer to a meter object
* @param scale pointer to scale (added to `meter`)
* @param width width of the arc
* @param color color of the arc
* @param r_mod the radius modifier (added to the scale's radius) to get the outer radius of the arc
* @return the new indicator
*/
lv_meter_indicator_t * lv_meter_add_arc(lv_obj_t * obj, lv_meter_scale_t * scale, uint16_t width, lv_color_t color,
int16_t r_mod);
/**
* Add a scale line indicator the scale. It will modify the ticks.
* @param obj pointer to a meter object
* @param scale pointer to scale (added to `meter`)
* @param color_start the start color
* @param color_end the end color
* @param local tell how to map start and end color. true: the indicator's start and end_value; false: the scale's min max value
* @param width_mod add this the affected tick's width
* @return the new indicator
*/
lv_meter_indicator_t * lv_meter_add_scale_lines(lv_obj_t * obj, lv_meter_scale_t * scale, lv_color_t color_start,
lv_color_t color_end, bool local, int16_t width_mod);
/*=====================
* Set indicator value
*====================*/
/**
* Set the value of the indicator. It will set start and and value to the same value
* @param obj pointer to a meter object
* @param indic pointer to an indicator
* @param value the new value
*/
void lv_meter_set_indicator_value(lv_obj_t * obj, lv_meter_indicator_t * indic, int32_t value);
/**
* Set the start value of the indicator.
* @param obj pointer to a meter object
* @param indic pointer to an indicator
* @param value the new value
*/
void lv_meter_set_indicator_start_value(lv_obj_t * obj, lv_meter_indicator_t * indic, int32_t value);
/**
* Set the start value of the indicator.
* @param obj pointer to a meter object
* @param indic pointer to an indicator
* @param value the new value
*/
void lv_meter_set_indicator_end_value(lv_obj_t * obj, lv_meter_indicator_t * indic, int32_t value);
/**********************
* MACROS
**********************/
#endif /*LV_USE_METER*/
#ifdef __cplusplus
} /*extern "C"*/
#endif
#endif /*LV_METER_H*/