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/**
* @file lv_line.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_line.h"
#if LV_USE_LINE != 0
#include "../../misc/lv_assert.h"
#include "../../misc/lv_math.h"
#include "../../draw/lv_draw.h"
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
/*********************
* DEFINES
*********************/
#define MY_CLASS (&lv_line_class)
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void lv_line_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
static void lv_line_event(const lv_obj_class_t * class_p, lv_event_t * e);
/**********************
* STATIC VARIABLES
**********************/
const lv_obj_class_t lv_line_class = {
.constructor_cb = lv_line_constructor,
.event_cb = lv_line_event,
.width_def = LV_SIZE_CONTENT,
.height_def = LV_SIZE_CONTENT,
.instance_size = sizeof(lv_line_t),
.base_class = &lv_obj_class,
.name = "line",
};
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
lv_obj_t * lv_line_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;
}
/*=====================
* Setter functions
*====================*/
void lv_line_set_points(lv_obj_t * obj, const lv_point_precise_t points[], uint32_t point_num)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_line_t * line = (lv_line_t *)obj;
line->point_array = points;
line->point_num = point_num;
lv_obj_refresh_self_size(obj);
lv_obj_invalidate(obj);
}
void lv_line_set_y_invert(lv_obj_t * obj, bool en)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_line_t * line = (lv_line_t *)obj;
if(line->y_inv == en) return;
line->y_inv = en ? 1U : 0U;
lv_obj_invalidate(obj);
}
/*=====================
* Getter functions
*====================*/
bool lv_line_get_y_invert(const lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_line_t * line = (lv_line_t *)obj;
return line->y_inv == 1U;
}
/**********************
* STATIC FUNCTIONS
**********************/
static void lv_line_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
{
LV_UNUSED(class_p);
LV_TRACE_OBJ_CREATE("begin");
lv_line_t * line = (lv_line_t *)obj;
line->point_num = 0;
line->point_array = NULL;
line->y_inv = 0;
lv_obj_remove_flag(obj, LV_OBJ_FLAG_CLICKABLE);
LV_TRACE_OBJ_CREATE("finished");
}
static inline lv_value_precise_t resolve_point_coord(lv_value_precise_t coord, int32_t max)
{
if(LV_COORD_IS_PCT((int32_t)coord)) {
return LV_CLAMP(0, max * LV_COORD_GET_PCT((int32_t)coord) / 100, max);
}
else {
return coord;
}
}
static void lv_line_event(const lv_obj_class_t * class_p, lv_event_t * e)
{
LV_UNUSED(class_p);
lv_result_t res;
/*Call the ancestor's event handler*/
res = lv_obj_event_base(MY_CLASS, e);
if(res != LV_RESULT_OK) return;
lv_event_code_t code = lv_event_get_code(e);
lv_obj_t * obj = lv_event_get_current_target(e);
if(code == LV_EVENT_REFR_EXT_DRAW_SIZE) {
/*The corner of the skew lines is out of the intended area*/
int32_t line_width = lv_obj_get_style_line_width(obj, LV_PART_MAIN);
int32_t * s = lv_event_get_param(e);
if(*s < line_width) *s = line_width;
}
else if(code == LV_EVENT_GET_SELF_SIZE) {
lv_line_t * line = (lv_line_t *)obj;
if(line->point_num == 0 || line->point_array == NULL) return;
lv_point_t * p = lv_event_get_param(e);
int32_t w = 0;
int32_t h = 0;
uint32_t i;
for(i = 0; i < line->point_num; i++) {
if(!LV_COORD_IS_PCT((int32_t)line->point_array[i].x)) {
w = (int32_t)LV_MAX(line->point_array[i].x, w);
}
if(!LV_COORD_IS_PCT((int32_t)line->point_array[i].y)) {
h = (int32_t)LV_MAX(line->point_array[i].y, h);
}
}
p->x = w;
p->y = h;
}
else if(code == LV_EVENT_DRAW_MAIN) {
lv_line_t * line = (lv_line_t *)obj;
lv_layer_t * layer = lv_event_get_layer(e);
if(line->point_num == 0 || line->point_array == NULL) return;
lv_area_t area;
lv_obj_get_coords(obj, &area);
int32_t x_ofs = area.x1 - lv_obj_get_scroll_x(obj);
int32_t y_ofs = area.y1 - lv_obj_get_scroll_y(obj);
lv_draw_line_dsc_t line_dsc;
lv_draw_line_dsc_init(&line_dsc);
lv_obj_init_draw_line_dsc(obj, LV_PART_MAIN, &line_dsc);
/*Read all points and draw the lines*/
uint32_t i;
for(i = 0; i < line->point_num - 1; i++) {
int32_t w = lv_obj_get_width(obj);
int32_t h = lv_obj_get_height(obj);
line_dsc.p1.x = resolve_point_coord(line->point_array[i].x, w) + x_ofs;
line_dsc.p1.y = resolve_point_coord(line->point_array[i].y, h);
line_dsc.p2.x = resolve_point_coord(line->point_array[i + 1].x, w) + x_ofs;
line_dsc.p2.y = resolve_point_coord(line->point_array[i + 1].y, h);
if(line->y_inv == 0) {
line_dsc.p1.y = line_dsc.p1.y + y_ofs;
line_dsc.p2.y = line_dsc.p2.y + y_ofs;
}
else {
line_dsc.p1.y = h - line_dsc.p1.y + y_ofs;
line_dsc.p2.y = h - line_dsc.p2.y + y_ofs;
}
lv_draw_line(layer, &line_dsc);
line_dsc.round_start = 0; /*Draw the rounding only on the end points after the first line*/
}
}
}
#endif
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