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bl_mcu_sdk/components/lvgl/lv_widgets/lv_arc.c
jzlv d427e7fdda [style] format files by clang-format
2021-06-20 12:25:46 +08:00

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/**
* @file lv_arc.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_arc.h"
#if LV_USE_ARC != 0
#include "../lv_core/lv_group.h"
#include "../lv_core/lv_indev.h"
#include "../lv_misc/lv_debug.h"
#include "../lv_misc/lv_math.h"
#include "../lv_draw/lv_draw_arc.h"
#include "../lv_themes/lv_theme.h"
/*********************
* DEFINES
*********************/
#define LV_OBJX_NAME "lv_arc"
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static lv_design_res_t lv_arc_design(lv_obj_t *arc, const lv_area_t *clip_area, lv_design_mode_t mode);
static lv_res_t lv_arc_signal(lv_obj_t *arc, lv_signal_t sign, void *param);
static lv_style_list_t *lv_arc_get_style(lv_obj_t *arc, uint8_t part);
static void inv_arc_area(lv_obj_t *arc, uint16_t start_angle, uint16_t end_angle, lv_arc_part_t part);
static void get_center(lv_obj_t *arc, lv_point_t *center, lv_coord_t *arc_r);
static void get_knob_area(lv_obj_t *arc, const lv_point_t *center, lv_coord_t r, lv_area_t *knob_area);
static void value_update(lv_obj_t *arc);
/**********************
* STATIC VARIABLES
**********************/
static lv_signal_cb_t ancestor_signal;
static lv_design_cb_t ancestor_design;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Create a arc object
* @param par pointer to an object, it will be the parent of the new arc
* @param copy pointer to a arc object, if not NULL then the new object will be copied from it
* @return pointer to the created arc
*/
lv_obj_t *lv_arc_create(lv_obj_t *par, const lv_obj_t *copy)
{
LV_LOG_TRACE("arc create started");
/*Create the ancestor of arc*/
lv_obj_t *arc = lv_obj_create(par, copy);
LV_ASSERT_MEM(arc);
if (arc == NULL) {
return NULL;
}
/*Allocate the arc type specific extended data*/
lv_arc_ext_t *ext = lv_obj_allocate_ext_attr(arc, sizeof(lv_arc_ext_t));
LV_ASSERT_MEM(ext);
if (ext == NULL) {
lv_obj_del(arc);
return NULL;
}
if (ancestor_signal == NULL) {
ancestor_signal = lv_obj_get_signal_cb(arc);
}
if (ancestor_design == NULL) {
ancestor_design = lv_obj_get_design_cb(arc);
}
/*Initialize the allocated 'ext' */
ext->rotation_angle = 0;
ext->bg_angle_start = 135;
ext->bg_angle_end = 45;
ext->arc_angle_start = 135;
ext->arc_angle_end = 270;
ext->type = LV_ARC_TYPE_NORMAL;
ext->cur_value = -1;
ext->min_close = 1;
ext->min_value = 0;
ext->max_value = 100;
ext->dragging = false;
ext->adjustable = false;
ext->chg_rate = 540;
ext->last_tick = lv_tick_get();
ext->last_angle = ext->arc_angle_end;
lv_style_list_init(&ext->style_arc);
lv_style_list_init(&ext->style_knob);
lv_obj_set_size(arc, LV_DPI, LV_DPI);
/*The signal and design functions are not copied so set them here*/
lv_obj_set_signal_cb(arc, lv_arc_signal);
lv_obj_set_design_cb(arc, lv_arc_design);
/*Init the new arc arc*/
if (copy == NULL) {
lv_obj_set_click(arc, true);
lv_obj_add_protect(arc, LV_PROTECT_PRESS_LOST);
lv_obj_set_ext_click_area(arc, LV_DPI / 10, LV_DPI / 10, LV_DPI / 10, LV_DPI / 10);
lv_arc_set_value(arc, ext->min_value);
lv_theme_apply(arc, LV_THEME_ARC);
}
/*Copy an existing arc*/
else {
lv_arc_ext_t *copy_ext = lv_obj_get_ext_attr(copy);
ext->arc_angle_start = copy_ext->arc_angle_start;
ext->arc_angle_end = copy_ext->arc_angle_end;
ext->bg_angle_start = copy_ext->bg_angle_start;
ext->bg_angle_end = copy_ext->bg_angle_end;
ext->type = copy_ext->type;
ext->cur_value = copy_ext->cur_value;
ext->min_value = copy_ext->min_value;
ext->max_value = copy_ext->max_value;
ext->dragging = copy_ext->dragging;
ext->adjustable = copy_ext->adjustable;
ext->chg_rate = copy_ext->chg_rate;
ext->last_tick = copy_ext->last_tick;
ext->last_angle = copy_ext->last_angle;
lv_style_list_copy(&ext->style_knob, &copy_ext->style_knob);
lv_style_list_copy(&ext->style_arc, &copy_ext->style_arc);
/*Refresh the style with new signal function*/
lv_obj_refresh_style(arc, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
}
LV_LOG_INFO("arc created");
return arc;
}
/*======================
* Add/remove functions
*=====================*/
/*
* New object specific "add" or "remove" functions come here
*/
/*=====================
* Setter functions
*====================*/
/**
* Set the start angle of an arc. 0 deg: right, 90 bottom, etc.
* @param arc pointer to an arc object
* @param start the start angle [0..360]
*/
void lv_arc_set_start_angle(lv_obj_t *arc, uint16_t start)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = lv_obj_get_ext_attr(arc);
if (start > 360) {
start -= 360;
}
/*Too large move, the whole arc need to be invalidated anyway*/
if (LV_MATH_ABS(start - ext->arc_angle_start) >= 180) {
lv_obj_invalidate(arc);
}
/*Only a smaller incremental move*/
else if (ext->arc_angle_start > ext->arc_angle_end && start > ext->arc_angle_end) {
inv_arc_area(arc, LV_MATH_MIN(ext->arc_angle_start, start), LV_MATH_MAX(ext->arc_angle_start, start),
LV_ARC_PART_INDIC);
}
/*Only a smaller incremental move*/
else if (ext->arc_angle_start < ext->arc_angle_end && start < ext->arc_angle_end) {
inv_arc_area(arc, LV_MATH_MIN(ext->arc_angle_start, start), LV_MATH_MAX(ext->arc_angle_start, start),
LV_ARC_PART_INDIC);
}
/*Crossing the start angle makes the whole arc change*/
else {
lv_obj_invalidate(arc);
}
ext->arc_angle_start = start;
}
/**
* Set the start angle of an arc. 0 deg: right, 90 bottom, etc.
* @param arc pointer to an arc object
* @param start the start angle [0..360]
*/
void lv_arc_set_end_angle(lv_obj_t *arc, uint16_t end)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = lv_obj_get_ext_attr(arc);
if (end > (ext->arc_angle_start + 360)) {
end = ext->arc_angle_start + 360;
}
/*Too large move, the whole arc need to be invalidated anyway*/
if (LV_MATH_ABS(end - ext->arc_angle_end) >= 180) {
lv_obj_invalidate(arc);
}
/*Only a smaller incremental move*/
else if (ext->arc_angle_end > ext->arc_angle_start && end > ext->arc_angle_start) {
inv_arc_area(arc, LV_MATH_MIN(ext->arc_angle_end, end), LV_MATH_MAX(ext->arc_angle_end, end), LV_ARC_PART_INDIC);
}
/*Only a smaller incremental move*/
else if (ext->arc_angle_end < ext->arc_angle_start && end < ext->arc_angle_start) {
inv_arc_area(arc, LV_MATH_MIN(ext->arc_angle_end, end), LV_MATH_MAX(ext->arc_angle_end, end), LV_ARC_PART_INDIC);
}
/*Crossing the end angle makes the whole arc change*/
else {
lv_obj_invalidate(arc);
}
ext->arc_angle_end = end;
}
/**
* Set the start and end angles
* @param arc pointer to an arc object
* @param start the start angle
* @param end the end angle
*/
void lv_arc_set_angles(lv_obj_t *arc, uint16_t start, uint16_t end)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = lv_obj_get_ext_attr(arc);
if (start > 360) {
start -= 360;
}
if (end > (start + 360)) {
end = start + 360;
}
inv_arc_area(arc, ext->arc_angle_start, ext->arc_angle_end, LV_ARC_PART_INDIC);
ext->arc_angle_start = start;
ext->arc_angle_end = end;
inv_arc_area(arc, ext->arc_angle_start, ext->arc_angle_end, LV_ARC_PART_INDIC);
}
/**
* Set the start angle of an arc background. 0 deg: right, 90 bottom, etc.
* @param arc pointer to an arc object
* @param start the start angle
*/
void lv_arc_set_bg_start_angle(lv_obj_t *arc, uint16_t start)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = lv_obj_get_ext_attr(arc);
if (start > 360) {
start -= 360;
}
/*Too large move, the whole arc need to be invalidated anyway*/
if (LV_MATH_ABS(start - ext->bg_angle_start) >= 180) {
lv_obj_invalidate(arc);
}
/*Only a smaller incremental move*/
else if (ext->bg_angle_start > ext->bg_angle_end && start > ext->bg_angle_end) {
inv_arc_area(arc, LV_MATH_MIN(ext->bg_angle_start, start), LV_MATH_MAX(ext->bg_angle_start, start), LV_ARC_PART_BG);
}
/*Only a smaller incremental move*/
else if (ext->bg_angle_start < ext->bg_angle_end && start < ext->bg_angle_end) {
inv_arc_area(arc, LV_MATH_MIN(ext->bg_angle_start, start), LV_MATH_MAX(ext->bg_angle_start, start), LV_ARC_PART_BG);
}
/*Crossing the start angle makes the whole arc change*/
else {
lv_obj_invalidate(arc);
}
ext->bg_angle_start = start;
value_update(arc);
}
/**
* Set the start angle of an arc background. 0 deg: right, 90 bottom etc.
* @param arc pointer to an arc object
* @param end the end angle
*/
void lv_arc_set_bg_end_angle(lv_obj_t *arc, uint16_t end)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = lv_obj_get_ext_attr(arc);
if (end > (ext->bg_angle_start + 360)) {
end = ext->bg_angle_start + 360;
}
/*Too large move, the whole arc need to be invalidated anyway*/
if (LV_MATH_ABS(end - ext->bg_angle_end) >= 180) {
lv_obj_invalidate(arc);
}
/*Only a smaller incremental move*/
else if (ext->bg_angle_end > ext->bg_angle_start && end > ext->bg_angle_start) {
inv_arc_area(arc, LV_MATH_MIN(ext->bg_angle_end, end), LV_MATH_MAX(ext->bg_angle_end, end), LV_ARC_PART_BG);
}
/*Only a smaller incremental move*/
else if (ext->bg_angle_end < ext->bg_angle_start && end < ext->bg_angle_start) {
inv_arc_area(arc, LV_MATH_MIN(ext->bg_angle_end, end), LV_MATH_MAX(ext->bg_angle_end, end), LV_ARC_PART_BG);
}
/*Crossing the end angle makes the whole arc change*/
else {
lv_obj_invalidate(arc);
}
value_update(arc);
ext->bg_angle_end = end;
}
/**
* Set the start and end angles of the arc background
* @param arc pointer to an arc object
* @param start the start angle
* @param end the end angle
*/
void lv_arc_set_bg_angles(lv_obj_t *arc, uint16_t start, uint16_t end)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = lv_obj_get_ext_attr(arc);
if (start > 360) {
start -= 360;
}
if (end > (start + 360)) {
end = start + 360;
}
inv_arc_area(arc, ext->bg_angle_start, ext->bg_angle_end, LV_ARC_PART_BG);
ext->bg_angle_start = start;
ext->bg_angle_end = end;
inv_arc_area(arc, ext->bg_angle_start, ext->bg_angle_end, LV_ARC_PART_BG);
value_update(arc);
}
/**
* Set the rotation for the whole arc
* @param arc pointer to an arc object
* @param rotation_angle rotation angle
*/
void lv_arc_set_rotation(lv_obj_t *arc, uint16_t rotation_angle)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = lv_obj_get_ext_attr(arc);
ext->rotation_angle = rotation_angle;
lv_obj_invalidate(arc);
}
/**
* Set the type of arc.
* @param arc pointer to arc object
* @param type arc type
*/
void lv_arc_set_type(lv_obj_t *arc, lv_arc_type_t type)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = (lv_arc_ext_t *)lv_obj_get_ext_attr(arc);
int16_t val = ext->cur_value;
ext->type = type;
ext->cur_value = -1; /** Force set_value handling*/
int16_t bg_midpoint, bg_end = ext->bg_angle_end;
if (ext->bg_angle_end < ext->bg_angle_start) {
bg_end = ext->bg_angle_end + 360;
}
switch (ext->type) {
case LV_ARC_TYPE_SYMMETRIC:
bg_midpoint = (ext->bg_angle_start + bg_end) / 2;
lv_arc_set_start_angle(arc, bg_midpoint);
lv_arc_set_end_angle(arc, bg_midpoint);
break;
case LV_ARC_TYPE_REVERSE:
lv_arc_set_end_angle(arc, ext->bg_angle_end);
break;
default: /** LV_ARC_TYPE_NORMAL*/
lv_arc_set_start_angle(arc, ext->bg_angle_start);
}
lv_arc_set_value(arc, val);
}
/**
* Set a new value on the arc
* @param arc pointer to a arc object
* @param value new value
*/
void lv_arc_set_value(lv_obj_t *arc, int16_t value)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = (lv_arc_ext_t *)lv_obj_get_ext_attr(arc);
if (ext->cur_value == value) {
return;
}
int16_t new_value;
new_value = value > ext->max_value ? ext->max_value : value;
new_value = new_value < ext->min_value ? ext->min_value : new_value;
if (ext->cur_value == new_value) {
return;
}
ext->cur_value = new_value;
value_update(arc);
}
/**
* Set minimum and the maximum values of a arc
* @param arc pointer to the arc object
* @param min minimum value
* @param max maximum value
*/
void lv_arc_set_range(lv_obj_t *arc, int16_t min, int16_t max)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = (lv_arc_ext_t *)lv_obj_get_ext_attr(arc);
if (ext->min_value == min && ext->max_value == max) {
return;
}
ext->min_value = min;
ext->max_value = max;
if (ext->cur_value < min) {
ext->cur_value = min;
}
if (ext->cur_value > max) {
ext->cur_value = max;
}
value_update(arc); /* value has changed relative to the new range */
}
/**
* Set the threshold of arc knob increments
* position.
* @param arc pointer to a arc object
* @param threshold increment threshold
*/
void lv_arc_set_chg_rate(lv_obj_t *arc, uint16_t rate)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = (lv_arc_ext_t *)lv_obj_get_ext_attr(arc);
ext->chg_rate = rate;
}
/**
* Set whether the arc is adjustable.
* @param arc pointer to a arc object
* @param adjustable whether the arc has a knob that can be dragged
*/
void lv_arc_set_adjustable(lv_obj_t *arc, bool adjustable)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = (lv_arc_ext_t *)lv_obj_get_ext_attr(arc);
if (ext->adjustable == adjustable) {
return;
}
ext->adjustable = adjustable;
if (!adjustable) {
ext->dragging = false;
}
lv_obj_invalidate(arc);
}
/*=====================
* Getter functions
*====================*/
/**
* Get the start angle of an arc.
* @param arc pointer to an arc object
* @return the start angle [0..360]
*/
uint16_t lv_arc_get_angle_start(lv_obj_t *arc)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = lv_obj_get_ext_attr(arc);
return ext->arc_angle_start;
}
/**
* Get the end angle of an arc.
* @param arc pointer to an arc object
* @return the end angle [0..360]
*/
uint16_t lv_arc_get_angle_end(lv_obj_t *arc)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = lv_obj_get_ext_attr(arc);
return ext->arc_angle_end;
}
/**
* Get the start angle of an arc background.
* @param arc pointer to an arc object
* @return the start angle [0..360]
*/
uint16_t lv_arc_get_bg_angle_start(lv_obj_t *arc)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = lv_obj_get_ext_attr(arc);
return ext->bg_angle_start;
}
/**
* Get the end angle of an arc background.
* @param arc pointer to an arc object
* @return the end angle [0..360]
*/
uint16_t lv_arc_get_bg_angle_end(lv_obj_t *arc)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = lv_obj_get_ext_attr(arc);
return ext->bg_angle_end;
}
/**
* Get the value of a arc
* @param arc pointer to a arc object
* @return the value of the arc
*/
int16_t lv_arc_get_value(const lv_obj_t *arc)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = lv_obj_get_ext_attr(arc);
return ext->cur_value;
}
/**
* Get the minimum value of a arc
* @param arc pointer to a arc object
* @return the minimum value of the arc
*/
int16_t lv_arc_get_min_value(const lv_obj_t *arc)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = (lv_arc_ext_t *)lv_obj_get_ext_attr(arc);
return ext->min_value;
}
/**
* Get the maximum value of a arc
* @param arc pointer to a arc object
* @return the maximum value of the arc
*/
int16_t lv_arc_get_max_value(const lv_obj_t *arc)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = (lv_arc_ext_t *)lv_obj_get_ext_attr(arc);
return ext->max_value;
}
/**
* Give the arc is being dragged or not
* @param arc pointer to a arc object
* @return true: drag in progress false: not dragged
*/
bool lv_arc_is_dragged(const lv_obj_t *arc)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = lv_obj_get_ext_attr(arc);
return ext->dragging;
}
/**
* Get whether the arc is type or not.
* @param arc pointer to a arc object
* @return arc type
*/
lv_arc_type_t lv_arc_get_type(const lv_obj_t *arc)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = (lv_arc_ext_t *)lv_obj_get_ext_attr(arc);
return ext->type;
}
/**
* Get whether the arc is adjustable.
* @param arc pointer to a arc object
* @return whether the arc has a knob that can be dragged
*/
bool lv_arc_get_adjustable(lv_obj_t *arc)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = (lv_arc_ext_t *)lv_obj_get_ext_attr(arc);
return ext->adjustable;
}
/*=====================
* Other functions
*====================*/
/*
* New object specific "other" functions come here
*/
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Handle the drawing related tasks of the arcs
* @param arc pointer to an object
* @param clip_area 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 an element of `lv_design_res_t`
*/
static lv_design_res_t lv_arc_design(lv_obj_t *arc, const lv_area_t *clip_area, lv_design_mode_t mode)
{
/*Return false if the object is not covers the mask_p area*/
if (mode == LV_DESIGN_COVER_CHK) {
return LV_DESIGN_RES_NOT_COVER;
}
/*Draw the object*/
else if (mode == LV_DESIGN_DRAW_MAIN) {
lv_arc_ext_t *ext = lv_obj_get_ext_attr(arc);
lv_draw_rect_dsc_t bg_dsc;
lv_draw_rect_dsc_init(&bg_dsc);
lv_obj_init_draw_rect_dsc(arc, LV_ARC_PART_BG, &bg_dsc);
lv_draw_rect(&arc->coords, clip_area, &bg_dsc);
lv_point_t center;
lv_coord_t arc_r;
get_center(arc, &center, &arc_r);
/*Draw the background arc*/
lv_draw_line_dsc_t arc_dsc;
if (arc_r > 0) {
lv_draw_line_dsc_init(&arc_dsc);
lv_obj_init_draw_line_dsc(arc, LV_ARC_PART_BG, &arc_dsc);
lv_draw_arc(center.x, center.y, arc_r, ext->bg_angle_start + ext->rotation_angle,
ext->bg_angle_end + ext->rotation_angle, clip_area,
&arc_dsc);
}
/*make the indicator arc smaller or larger according to its greatest padding value*/
lv_coord_t left_indic = lv_obj_get_style_pad_left(arc, LV_ARC_PART_INDIC);
lv_coord_t right_indic = lv_obj_get_style_pad_right(arc, LV_ARC_PART_INDIC);
lv_coord_t top_indic = lv_obj_get_style_pad_top(arc, LV_ARC_PART_INDIC);
lv_coord_t bottom_indic = lv_obj_get_style_pad_bottom(arc, LV_ARC_PART_INDIC);
lv_coord_t indic_r = arc_r - LV_MATH_MAX4(left_indic, right_indic, top_indic, bottom_indic);
if (indic_r > 0) {
lv_draw_line_dsc_init(&arc_dsc);
lv_obj_init_draw_line_dsc(arc, LV_ARC_PART_INDIC, &arc_dsc);
lv_draw_arc(center.x, center.y, indic_r, ext->arc_angle_start + ext->rotation_angle,
ext->arc_angle_end + ext->rotation_angle, clip_area,
&arc_dsc);
}
if (ext->adjustable) {
lv_area_t knob_area;
get_knob_area(arc, &center, arc_r, &knob_area);
lv_draw_rect_dsc_t knob_rect_dsc;
lv_draw_rect_dsc_init(&knob_rect_dsc);
lv_obj_init_draw_rect_dsc(arc, LV_ARC_PART_KNOB, &knob_rect_dsc);
lv_draw_rect(&knob_area, clip_area, &knob_rect_dsc);
}
}
/*Post draw when the children are drawn*/
else if (mode == LV_DESIGN_DRAW_POST) {
}
return LV_DESIGN_RES_OK;
}
/**
* Signal function of the arc
* @param arc pointer to a arc 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_arc_signal(lv_obj_t *arc, lv_signal_t sign, void *param)
{
lv_res_t res;
if (sign == LV_SIGNAL_GET_STYLE) {
lv_get_style_info_t *info = param;
info->result = lv_arc_get_style(arc, info->part);
if (info->result != NULL) {
return LV_RES_OK;
} else {
return ancestor_signal(arc, sign, param);
}
}
/* Include the ancient signal function */
res = ancestor_signal(arc, sign, param);
if (res != LV_RES_OK) {
return res;
}
if (sign == LV_SIGNAL_GET_TYPE) {
return lv_obj_handle_get_type_signal(param, LV_OBJX_NAME);
}
lv_arc_ext_t *ext = lv_obj_get_ext_attr(arc);
if (sign == LV_SIGNAL_PRESSING) {
/* Only adjustable arcs can be dragged */
if (!ext->adjustable) {
return res;
}
lv_indev_t *indev = lv_indev_get_act();
if (indev == NULL) {
return res;
}
/*Handle only pointers here*/
lv_indev_type_t indev_type = lv_indev_get_type(indev);
if (indev_type != LV_INDEV_TYPE_POINTER) {
return res;
}
lv_point_t p;
lv_indev_get_point(indev, &p);
/*Make point relative to the arc's center*/
lv_point_t center;
lv_coord_t r;
get_center(arc, &center, &r);
p.x -= center.x;
p.y -= center.y;
/*Enter dragging mode if pressed out of the knob*/
if (ext->dragging == false) {
lv_coord_t indic_width = lv_obj_get_style_line_width(arc, LV_ARC_PART_INDIC);
r -= indic_width;
r -= r / 2; /*Add some more sensitive area*/
if (p.x * p.x + p.y * p.y > r * r) {
ext->dragging = true;
ext->last_tick = lv_tick_get(); /*Capture timestamp at dragging start*/
}
}
/*It must be in "dragging" mode to turn the arc*/
if (ext->dragging == false) {
return res;
}
/*No angle can be determined if exactly the middle of the arc is being pressed*/
if (p.x == 0 && p.y == 0) {
return res;
}
/*Calculate the angle of the pressed point*/
int16_t angle;
int16_t bg_end = ext->bg_angle_end;
if (ext->bg_angle_end < ext->bg_angle_start) {
bg_end = ext->bg_angle_end + 360;
}
angle = _lv_atan2(p.y, p.x);
angle -= ext->rotation_angle;
angle -= ext->bg_angle_start; /*Make the angle relative to the start angle*/
if (angle < 0) {
angle += 360;
}
int16_t deg_range = bg_end - ext->bg_angle_start;
int16_t last_angle_rel = ext->last_angle - ext->bg_angle_start;
int16_t delta_angle = angle - last_angle_rel;
/* Do not allow big jumps.
* It's mainly to avoid jumping to the opposite end if the "dead" range between min. an max. is crossed.
* Check which and was closer on the last valid press (ext->min_close) and prefer that end */
if (LV_MATH_ABS(delta_angle) > 180) {
if (ext->min_close) {
angle = 0;
} else {
angle = deg_range;
}
} else {
if (angle < deg_range / 2) {
ext->min_close = 1;
} else {
ext->min_close = 0;
}
}
/*Calculate the slew rate limited angle based on change rate (degrees/sec)*/
delta_angle = angle - last_angle_rel;
uint32_t delta_tick = lv_tick_elaps(ext->last_tick);
int16_t delta_angle_max = (ext->chg_rate * delta_tick) / 1000;
if (delta_angle > delta_angle_max) {
delta_angle = delta_angle_max;
} else if (delta_angle < -delta_angle_max) {
delta_angle = -delta_angle_max;
}
angle = last_angle_rel + delta_angle; /*Apply the limited angle change*/
/*Rounding for symmetry*/
int32_t round = ((bg_end - ext->bg_angle_start) * 8) / (ext->max_value - ext->min_value);
round = (round + 4) >> 4;
angle += round;
angle += ext->bg_angle_start; /*Make the angle absolute again*/
/*Set the new value*/
int16_t old_value = ext->cur_value;
int16_t new_value = _lv_map(angle, ext->bg_angle_start, bg_end, ext->min_value, ext->max_value);
if (new_value != lv_arc_get_value(arc)) {
ext->last_tick = lv_tick_get(); /*Cache timestamp for the next iteration*/
lv_arc_set_value(arc, new_value); /*set_value caches the last_angle for the next iteration*/
if (new_value != old_value) {
res = lv_event_send(arc, LV_EVENT_VALUE_CHANGED, NULL);
if (res != LV_RES_OK) {
return res;
}
}
}
/*Don1't let the elapsed time to big while sitting on an end point*/
if (new_value == ext->min_value || new_value == ext->max_value) {
ext->last_tick = lv_tick_get(); /*Cache timestamp for the next iteration*/
}
} else if (sign == LV_SIGNAL_RELEASED || sign == LV_SIGNAL_PRESS_LOST) {
ext->dragging = false;
#if LV_USE_GROUP
/*Leave edit mode if released. (No need to wait for LONG_PRESS) */
lv_group_t *g = lv_obj_get_group(arc);
bool editing = lv_group_get_editing(g);
lv_indev_type_t indev_type = lv_indev_get_type(lv_indev_get_act());
if (indev_type == LV_INDEV_TYPE_ENCODER) {
if (editing) {
lv_group_set_editing(g, false);
}
}
#endif
} else if (sign == LV_SIGNAL_CONTROL) {
if (!ext->adjustable) {
return res;
}
char c = *((char *)param);
int16_t old_value = ext->cur_value;
if (c == LV_KEY_RIGHT || c == LV_KEY_UP) {
lv_arc_set_value(arc, lv_arc_get_value(arc) + 1);
} else if (c == LV_KEY_LEFT || c == LV_KEY_DOWN) {
lv_arc_set_value(arc, lv_arc_get_value(arc) - 1);
}
if (old_value != ext->cur_value) {
res = lv_event_send(arc, LV_EVENT_VALUE_CHANGED, NULL);
if (res != LV_RES_OK) {
return res;
}
}
} else if (sign == LV_SIGNAL_GET_EDITABLE) {
#if LV_USE_GROUP
bool *editable = (bool *)param;
*editable = true;
#endif
} else if (sign == LV_SIGNAL_CLEANUP) {
lv_obj_clean_style_list(arc, LV_ARC_PART_KNOB);
lv_obj_clean_style_list(arc, LV_ARC_PART_INDIC);
}
return res;
}
/**
* Get the style descriptor of a part of the object
* @param arc pointer the object
* @param part the part of the object. (LV_ARC_PART_...)
* @return pointer to the style descriptor of the specified part
*/
static lv_style_list_t *lv_arc_get_style(lv_obj_t *arc, uint8_t part)
{
LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
lv_arc_ext_t *ext = lv_obj_get_ext_attr(arc);
lv_style_list_t *style_dsc_p;
switch (part) {
case LV_ARC_PART_BG:
style_dsc_p = &arc->style_list;
break;
case LV_ARC_PART_INDIC:
style_dsc_p = &ext->style_arc;
break;
case LV_ARC_PART_KNOB:
style_dsc_p = &ext->style_knob;
break;
default:
style_dsc_p = NULL;
}
return style_dsc_p;
}
static void inv_arc_area(lv_obj_t *arc, uint16_t start_angle, uint16_t end_angle, lv_arc_part_t part)
{
/*Skip this complicated invalidation if the arc is not visible*/
if (lv_obj_is_visible(arc) == false) {
return;
}
lv_arc_ext_t *ext = lv_obj_get_ext_attr(arc);
start_angle += ext->rotation_angle;
end_angle += ext->rotation_angle;
if (start_angle >= 360) {
start_angle -= 360;
}
if (end_angle >= 360) {
end_angle -= 360;
}
uint8_t start_quarter = start_angle / 90;
uint8_t end_quarter = end_angle / 90;
lv_coord_t left = lv_obj_get_style_pad_left(arc, LV_ARC_PART_BG);
lv_coord_t right = lv_obj_get_style_pad_right(arc, LV_ARC_PART_BG);
lv_coord_t top = lv_obj_get_style_pad_top(arc, LV_ARC_PART_BG);
lv_coord_t bottom = lv_obj_get_style_pad_bottom(arc, LV_ARC_PART_BG);
lv_coord_t rout = (LV_MATH_MIN(lv_obj_get_width(arc) - left - right, lv_obj_get_height(arc) - top - bottom)) / 2;
lv_coord_t x = arc->coords.x1 + rout + left;
lv_coord_t y = arc->coords.y1 + rout + top;
lv_style_int_t w = lv_obj_get_style_line_width(arc, part);
lv_style_int_t rounded = lv_obj_get_style_line_rounded(arc, part);
lv_coord_t rin = rout - w;
lv_coord_t extra_area = 0;
extra_area = rounded ? w / 2 + 2 : 0;
if (part == LV_ARC_PART_INDIC && lv_style_list_get_style(&ext->style_knob, 0) != NULL) {
lv_coord_t knob_extra_size = lv_obj_get_draw_rect_ext_pad_size(arc, LV_ARC_PART_KNOB);
lv_coord_t knob_left = lv_obj_get_style_pad_left(arc, LV_ARC_PART_KNOB);
lv_coord_t knob_right = lv_obj_get_style_pad_right(arc, LV_ARC_PART_KNOB);
lv_coord_t knob_top = lv_obj_get_style_pad_top(arc, LV_ARC_PART_KNOB);
lv_coord_t knob_bottom = lv_obj_get_style_pad_bottom(arc, LV_ARC_PART_KNOB);
knob_extra_size += LV_MATH_MAX4(knob_left, knob_right, knob_top, knob_bottom);
extra_area = LV_MATH_MAX(extra_area, w / 2 + 2 + knob_extra_size);
}
lv_area_t inv_area;
if (start_quarter == end_quarter && start_angle <= end_angle) {
if (start_quarter == 0) {
inv_area.y1 = y + ((_lv_trigo_sin(start_angle) * rin) >> LV_TRIGO_SHIFT) - extra_area;
inv_area.x2 = x + ((_lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT) + extra_area;
inv_area.y2 = y + ((_lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT) + extra_area;
inv_area.x1 = x + ((_lv_trigo_sin(end_angle + 90) * rin) >> LV_TRIGO_SHIFT) - extra_area;
lv_obj_invalidate_area(arc, &inv_area);
} else if (start_quarter == 1) {
inv_area.y2 = y + ((_lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT) + extra_area;
inv_area.x2 = x + ((_lv_trigo_sin(start_angle + 90) * rin) >> LV_TRIGO_SHIFT) + extra_area;
inv_area.y1 = y + ((_lv_trigo_sin(end_angle) * rin) >> LV_TRIGO_SHIFT) - extra_area;
inv_area.x1 = x + ((_lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT) - extra_area;
lv_obj_invalidate_area(arc, &inv_area);
} else if (start_quarter == 2) {
inv_area.x1 = x + ((_lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT) - extra_area;
inv_area.y2 = y + ((_lv_trigo_sin(start_angle) * rin) >> LV_TRIGO_SHIFT) + extra_area;
inv_area.y1 = y + ((_lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT) - extra_area;
inv_area.x2 = x + ((_lv_trigo_sin(end_angle + 90) * rin) >> LV_TRIGO_SHIFT) + extra_area;
lv_obj_invalidate_area(arc, &inv_area);
} else if (start_quarter == 3) {
/*Small arc here*/
inv_area.x1 = x + ((_lv_trigo_sin(start_angle + 90) * rin) >> LV_TRIGO_SHIFT) - extra_area;
inv_area.y1 = y + ((_lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT) - extra_area;
inv_area.x2 = x + ((_lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT) + extra_area;
inv_area.y2 = y + ((_lv_trigo_sin(end_angle) * rin) >> LV_TRIGO_SHIFT) + extra_area;
lv_obj_invalidate_area(arc, &inv_area);
}
} else if (start_quarter == 0 && end_quarter == 1) {
inv_area.x1 = x + ((_lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT) - extra_area;
inv_area.y1 = y + ((LV_MATH_MIN(_lv_trigo_sin(end_angle), _lv_trigo_sin(start_angle)) * rin) >> LV_TRIGO_SHIFT) - extra_area;
inv_area.x2 = x + ((_lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT) + extra_area;
inv_area.y2 = y + rout + extra_area;
lv_obj_invalidate_area(arc, &inv_area);
} else if (start_quarter == 1 && end_quarter == 2) {
inv_area.x1 = x - rout - extra_area;
inv_area.y1 = y + ((_lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT) - extra_area;
inv_area.x2 = x + ((LV_MATH_MAX(_lv_trigo_sin(start_angle + 90), _lv_trigo_sin(end_angle + 90)) * rin) >> LV_TRIGO_SHIFT) + extra_area;
inv_area.y2 = y + ((_lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT) + extra_area;
lv_obj_invalidate_area(arc, &inv_area);
} else if (start_quarter == 2 && end_quarter == 3) {
inv_area.x1 = x + ((_lv_trigo_sin(start_angle + 90) * rout) >> LV_TRIGO_SHIFT) - extra_area;
inv_area.y1 = y - rout - extra_area;
inv_area.x2 = x + ((_lv_trigo_sin(end_angle + 90) * rout) >> LV_TRIGO_SHIFT) + extra_area;
inv_area.y2 = y + (LV_MATH_MAX(_lv_trigo_sin(end_angle) * rin, _lv_trigo_sin(start_angle) * rin) >> LV_TRIGO_SHIFT) + extra_area;
lv_obj_invalidate_area(arc, &inv_area);
} else if (start_quarter == 3 && end_quarter == 0) {
inv_area.x1 = x + ((LV_MATH_MIN(_lv_trigo_sin(end_angle + 90), _lv_trigo_sin(start_angle + 90)) * rin) >> LV_TRIGO_SHIFT) - extra_area;
inv_area.y1 = y + ((_lv_trigo_sin(start_angle) * rout) >> LV_TRIGO_SHIFT) - extra_area;
inv_area.x2 = x + rout + extra_area;
inv_area.y2 = y + ((_lv_trigo_sin(end_angle) * rout) >> LV_TRIGO_SHIFT) + extra_area;
lv_obj_invalidate_area(arc, &inv_area);
} else {
lv_obj_invalidate(arc);
}
}
static void get_center(lv_obj_t *arc, lv_point_t *center, lv_coord_t *arc_r)
{
lv_coord_t left_bg = lv_obj_get_style_pad_left(arc, LV_ARC_PART_BG);
lv_coord_t right_bg = lv_obj_get_style_pad_right(arc, LV_ARC_PART_BG);
lv_coord_t top_bg = lv_obj_get_style_pad_top(arc, LV_ARC_PART_BG);
lv_coord_t bottom_bg = lv_obj_get_style_pad_bottom(arc, LV_ARC_PART_BG);
lv_coord_t r = (LV_MATH_MIN(lv_obj_get_width(arc) - left_bg - right_bg,
lv_obj_get_height(arc) - top_bg - bottom_bg)) /
2;
*arc_r = r;
center->x = arc->coords.x1 + r + left_bg;
center->y = arc->coords.y1 + r + top_bg;
lv_coord_t indic_width = lv_obj_get_style_line_width(arc, LV_ARC_PART_INDIC);
r -= indic_width;
}
static void get_knob_area(lv_obj_t *arc, const lv_point_t *center, lv_coord_t r, lv_area_t *knob_area)
{
lv_arc_ext_t *ext = lv_obj_get_ext_attr(arc);
lv_coord_t indic_width = lv_obj_get_style_line_width(arc, LV_ARC_PART_INDIC);
lv_coord_t indic_width_half = indic_width / 2;
r -= indic_width_half;
uint16_t angle = ext->rotation_angle;
if (ext->type == LV_ARC_TYPE_NORMAL) {
angle += ext->arc_angle_end;
} else if (ext->type == LV_ARC_TYPE_REVERSE) {
angle += ext->arc_angle_start;
} else if (ext->type == LV_ARC_TYPE_SYMMETRIC) {
int32_t range_midpoint = (int32_t)(ext->min_value + ext->max_value) / 2;
if (ext->cur_value < range_midpoint) {
angle += ext->arc_angle_start;
} else {
angle += ext->arc_angle_end;
}
}
lv_coord_t knob_x = (r * _lv_trigo_sin(angle + 90)) >> LV_TRIGO_SHIFT;
lv_coord_t knob_y = (r * _lv_trigo_sin(angle)) >> LV_TRIGO_SHIFT;
lv_coord_t left_knob = lv_obj_get_style_pad_left(arc, LV_ARC_PART_KNOB);
lv_coord_t right_knob = lv_obj_get_style_pad_right(arc, LV_ARC_PART_KNOB);
lv_coord_t top_knob = lv_obj_get_style_pad_top(arc, LV_ARC_PART_KNOB);
lv_coord_t bottom_knob = lv_obj_get_style_pad_bottom(arc, LV_ARC_PART_KNOB);
knob_area->x1 = center->x + knob_x - left_knob - indic_width_half;
knob_area->x2 = center->x + knob_x + right_knob + indic_width_half;
knob_area->y1 = center->y + knob_y - top_knob - indic_width_half;
knob_area->y2 = center->y + knob_y + bottom_knob + indic_width_half;
}
/**
* Used internally to update arc angles after a value change
* @param arc pointer to a arc object
*/
static void value_update(lv_obj_t *arc)
{
lv_arc_ext_t *ext = (lv_arc_ext_t *)lv_obj_get_ext_attr(arc);
int16_t bg_midpoint, range_midpoint, bg_end = ext->bg_angle_end;
if (ext->bg_angle_end < ext->bg_angle_start) {
bg_end = ext->bg_angle_end + 360;
}
int16_t angle;
switch (ext->type) {
case LV_ARC_TYPE_SYMMETRIC:
bg_midpoint = (ext->bg_angle_start + bg_end) / 2;
range_midpoint = (int32_t)(ext->min_value + ext->max_value) / 2;
if (ext->cur_value < range_midpoint) {
angle = _lv_map(ext->cur_value, ext->min_value, range_midpoint, ext->bg_angle_start, bg_midpoint);
lv_arc_set_start_angle(arc, angle);
lv_arc_set_end_angle(arc, bg_midpoint);
} else {
angle = _lv_map(ext->cur_value, range_midpoint, ext->max_value, bg_midpoint, bg_end);
lv_arc_set_start_angle(arc, bg_midpoint);
lv_arc_set_end_angle(arc, angle);
}
break;
case LV_ARC_TYPE_REVERSE:
angle = _lv_map(ext->cur_value, ext->min_value, ext->max_value, ext->bg_angle_start, bg_end);
lv_arc_set_start_angle(arc, angle);
break;
default: /** LV_ARC_TYPE_NORMAL*/
angle = _lv_map(ext->cur_value, ext->min_value, ext->max_value, ext->bg_angle_start, bg_end);
lv_arc_set_end_angle(arc, angle);
lv_arc_set_start_angle(arc, ext->bg_angle_start);
}
ext->last_angle = angle; /*Cache angle for slew rate limiting*/
}
#endif
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