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lvgl_cpp/lvgl/widgets/lv_bar.c

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/**
* @file lv_bar.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_bar.h"
#if LV_USE_BAR != 0
#include "../misc/lv_assert.h"
#include "../draw/lv_draw.h"
#include "../misc/lv_anim.h"
#include "../misc/lv_math.h"
/*********************
* DEFINES
*********************/
#define MY_CLASS &lv_bar_class
/** hor. pad and ver. pad cannot make the indicator smaller than this [px]*/
#define LV_BAR_SIZE_MIN 4
#define LV_BAR_IS_ANIMATING(anim_struct) (((anim_struct).anim_state) != LV_BAR_ANIM_STATE_INV)
#define LV_BAR_GET_ANIM_VALUE(orig_value, anim_struct) (LV_BAR_IS_ANIMATING(anim_struct) ? ((anim_struct).anim_end) : (orig_value))
/** Bar animation start value. (Not the real value of the Bar just indicates process animation)*/
#define LV_BAR_ANIM_STATE_START 0
/** Bar animation end value. (Not the real value of the Bar just indicates process animation)*/
#define LV_BAR_ANIM_STATE_END 256
/** Mark no animation is in progress*/
#define LV_BAR_ANIM_STATE_INV -1
/** log2(LV_BAR_ANIM_STATE_END) used to normalize data*/
#define LV_BAR_ANIM_STATE_NORM 8
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void lv_bar_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
static void lv_bar_destructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
static void lv_bar_event(const lv_obj_class_t * class_p, lv_event_t * e);
static void draw_indic(lv_event_t * e);
static void lv_bar_set_value_with_anim(lv_obj_t * obj, int32_t new_value, int32_t * value_ptr,
_lv_bar_anim_t * anim_info, lv_anim_enable_t en);
static void lv_bar_init_anim(lv_obj_t * bar, _lv_bar_anim_t * bar_anim);
static void lv_bar_anim(void * bar, int32_t value);
static void lv_bar_anim_ready(lv_anim_t * a);
/**********************
* STATIC VARIABLES
**********************/
const lv_obj_class_t lv_bar_class = {
.constructor_cb = lv_bar_constructor,
.destructor_cb = lv_bar_destructor,
.event_cb = lv_bar_event,
.width_def = LV_DPI_DEF * 2,
.height_def = LV_DPI_DEF / 10,
.instance_size = sizeof(lv_bar_t),
.base_class = &lv_obj_class
};
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
lv_obj_t * lv_bar_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_bar_set_value(lv_obj_t * obj, int32_t value, lv_anim_enable_t anim)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_bar_t * bar = (lv_bar_t *)obj;
if(bar->cur_value == value) return;
value = LV_CLAMP(bar->min_value, value, bar->max_value);
value = value < bar->start_value ? bar->start_value : value; /*Can't be smaller than the left value*/
if(bar->cur_value == value) return;
lv_bar_set_value_with_anim(obj, value, &bar->cur_value, &bar->cur_value_anim, anim);
}
void lv_bar_set_start_value(lv_obj_t * obj, int32_t value, lv_anim_enable_t anim)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_bar_t * bar = (lv_bar_t *)obj;
if(bar->mode != LV_BAR_MODE_RANGE) {
return;
}
value = LV_CLAMP(bar->min_value, value, bar->max_value);
value = value > bar->cur_value ? bar->cur_value : value; /*Can't be greater than the right value*/
if(bar->start_value == value) return;
lv_bar_set_value_with_anim(obj, value, &bar->start_value, &bar->start_value_anim, anim);
}
void lv_bar_set_range(lv_obj_t * obj, int32_t min, int32_t max)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_bar_t * bar = (lv_bar_t *)obj;
if(bar->min_value == min && bar->max_value == max) return;
bar->max_value = max;
bar->min_value = min;
if(lv_bar_get_mode(obj) != LV_BAR_MODE_RANGE)
bar->start_value = min;
if(bar->cur_value > max) {
bar->cur_value = max;
lv_bar_set_value(obj, bar->cur_value, LV_ANIM_OFF);
}
if(bar->cur_value < min) {
bar->cur_value = min;
lv_bar_set_value(obj, bar->cur_value, LV_ANIM_OFF);
}
lv_obj_invalidate(obj);
}
void lv_bar_set_mode(lv_obj_t * obj, lv_bar_mode_t mode)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_bar_t * bar = (lv_bar_t *)obj;
bar->mode = mode;
if(bar->mode != LV_BAR_MODE_RANGE) {
bar->start_value = bar->min_value;
}
lv_obj_invalidate(obj);
}
/*=====================
* Getter functions
*====================*/
int32_t lv_bar_get_value(const lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_bar_t * bar = (lv_bar_t *)obj;
return LV_BAR_GET_ANIM_VALUE(bar->cur_value, bar->cur_value_anim);
}
int32_t lv_bar_get_start_value(const lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_bar_t * bar = (lv_bar_t *)obj;
if(bar->mode != LV_BAR_MODE_RANGE) return bar->min_value;
return LV_BAR_GET_ANIM_VALUE(bar->start_value, bar->start_value_anim);
}
int32_t lv_bar_get_min_value(const lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_bar_t * bar = (lv_bar_t *)obj;
return bar->min_value;
}
int32_t lv_bar_get_max_value(const lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_bar_t * bar = (lv_bar_t *)obj;
return bar->max_value;
}
lv_bar_mode_t lv_bar_get_mode(lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_bar_t * bar = (lv_bar_t *)obj;
return bar->mode;
}
/**********************
* STATIC FUNCTIONS
**********************/
static void lv_bar_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
{
LV_UNUSED(class_p);
LV_TRACE_OBJ_CREATE("begin");
lv_bar_t * bar = (lv_bar_t *)obj;
bar->min_value = 0;
bar->max_value = 100;
bar->start_value = 0;
bar->cur_value = 0;
bar->indic_area.x1 = 0;
bar->indic_area.x2 = 0;
bar->indic_area.y1 = 0;
bar->indic_area.y2 = 0;
bar->mode = LV_BAR_MODE_NORMAL;
lv_bar_init_anim(obj, &bar->cur_value_anim);
lv_bar_init_anim(obj, &bar->start_value_anim);
lv_obj_clear_flag(obj, LV_OBJ_FLAG_CHECKABLE);
lv_obj_clear_flag(obj, LV_OBJ_FLAG_SCROLLABLE);
lv_bar_set_value(obj, 0, LV_ANIM_OFF);
LV_TRACE_OBJ_CREATE("finished");
}
static void lv_bar_destructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
{
LV_UNUSED(class_p);
lv_bar_t * bar = (lv_bar_t *)obj;
lv_anim_del(&bar->cur_value_anim, NULL);
lv_anim_del(&bar->start_value_anim, NULL);
}
static void draw_indic(lv_event_t * e)
{
lv_obj_t * obj = lv_event_get_target(e);
lv_bar_t * bar = (lv_bar_t *)obj;
lv_draw_ctx_t * draw_ctx = lv_event_get_draw_ctx(e);
lv_area_t bar_coords;
lv_obj_get_coords(obj, &bar_coords);
lv_coord_t transf_w = lv_obj_get_style_transform_width(obj, LV_PART_MAIN);
lv_coord_t transf_h = lv_obj_get_style_transform_height(obj, LV_PART_MAIN);
bar_coords.x1 -= transf_w;
bar_coords.x2 += transf_w;
bar_coords.y1 -= transf_h;
bar_coords.y2 += transf_h;
lv_coord_t barw = lv_area_get_width(&bar_coords);
lv_coord_t barh = lv_area_get_height(&bar_coords);
int32_t range = bar->max_value - bar->min_value;
bool hor = barw >= barh ? true : false;
bool sym = false;
if(bar->mode == LV_BAR_MODE_SYMMETRICAL && bar->min_value < 0 && bar->max_value > 0 &&
bar->start_value == bar->min_value) sym = true;
/*Calculate the indicator area*/
lv_coord_t bg_left = lv_obj_get_style_pad_left(obj, LV_PART_MAIN);
lv_coord_t bg_right = lv_obj_get_style_pad_right(obj, LV_PART_MAIN);
lv_coord_t bg_top = lv_obj_get_style_pad_top(obj, LV_PART_MAIN);
lv_coord_t bg_bottom = lv_obj_get_style_pad_bottom(obj, LV_PART_MAIN);
/*Respect padding and minimum width/height too*/
lv_area_copy(&bar->indic_area, &bar_coords);
bar->indic_area.x1 += bg_left;
bar->indic_area.x2 -= bg_right;
bar->indic_area.y1 += bg_top;
bar->indic_area.y2 -= bg_bottom;
if(hor && lv_area_get_height(&bar->indic_area) < LV_BAR_SIZE_MIN) {
bar->indic_area.y1 = obj->coords.y1 + (barh / 2) - (LV_BAR_SIZE_MIN / 2);
bar->indic_area.y2 = bar->indic_area.y1 + LV_BAR_SIZE_MIN;
}
else if(!hor && lv_area_get_width(&bar->indic_area) < LV_BAR_SIZE_MIN) {
bar->indic_area.x1 = obj->coords.x1 + (barw / 2) - (LV_BAR_SIZE_MIN / 2);
bar->indic_area.x2 = bar->indic_area.x1 + LV_BAR_SIZE_MIN;
}
lv_coord_t indicw = lv_area_get_width(&bar->indic_area);
lv_coord_t indich = lv_area_get_height(&bar->indic_area);
/*Calculate the indicator length*/
lv_coord_t anim_length = hor ? indicw : indich;
lv_coord_t anim_cur_value_x, anim_start_value_x;
lv_coord_t * axis1, * axis2;
lv_coord_t (*indic_length_calc)(const lv_area_t * area);
if(hor) {
axis1 = &bar->indic_area.x1;
axis2 = &bar->indic_area.x2;
indic_length_calc = lv_area_get_width;
}
else {
axis1 = &bar->indic_area.y1;
axis2 = &bar->indic_area.y2;
indic_length_calc = lv_area_get_height;
}
if(LV_BAR_IS_ANIMATING(bar->start_value_anim)) {
lv_coord_t anim_start_value_start_x =
(int32_t)((int32_t)anim_length * (bar->start_value_anim.anim_start - bar->min_value)) / range;
lv_coord_t anim_start_value_end_x =
(int32_t)((int32_t)anim_length * (bar->start_value_anim.anim_end - bar->min_value)) / range;
anim_start_value_x = (((anim_start_value_end_x - anim_start_value_start_x) * bar->start_value_anim.anim_state) /
LV_BAR_ANIM_STATE_END);
anim_start_value_x += anim_start_value_start_x;
}
else {
anim_start_value_x = (int32_t)((int32_t)anim_length * (bar->start_value - bar->min_value)) / range;
}
if(LV_BAR_IS_ANIMATING(bar->cur_value_anim)) {
lv_coord_t anim_cur_value_start_x =
(int32_t)((int32_t)anim_length * (bar->cur_value_anim.anim_start - bar->min_value)) / range;
lv_coord_t anim_cur_value_end_x =
(int32_t)((int32_t)anim_length * (bar->cur_value_anim.anim_end - bar->min_value)) / range;
anim_cur_value_x = anim_cur_value_start_x + (((anim_cur_value_end_x - anim_cur_value_start_x) *
bar->cur_value_anim.anim_state) /
LV_BAR_ANIM_STATE_END);
}
else {
anim_cur_value_x = (int32_t)((int32_t)anim_length * (bar->cur_value - bar->min_value)) / range;
}
lv_base_dir_t base_dir = lv_obj_get_style_base_dir(obj, LV_PART_MAIN);
if(hor && base_dir == LV_BASE_DIR_RTL) {
/*Swap axes*/
lv_coord_t * tmp;
tmp = axis1;
axis1 = axis2;
axis2 = tmp;
anim_cur_value_x = -anim_cur_value_x;
anim_start_value_x = -anim_start_value_x;
}
/*Set the indicator length*/
if(hor) {
*axis2 = *axis1 + anim_cur_value_x;
*axis1 += anim_start_value_x;
}
else {
*axis1 = *axis2 - anim_cur_value_x + 1;
*axis2 -= anim_start_value_x;
}
if(sym) {
lv_coord_t zero, shift;
shift = (-bar->min_value * anim_length) / range;
if(hor) {
zero = *axis1 + shift;
if(*axis2 > zero)
*axis1 = zero;
else {
*axis1 = *axis2;
*axis2 = zero;
}
}
else {
zero = *axis2 - shift + 1;
if(*axis1 > zero)
*axis2 = zero;
else {
*axis2 = *axis1;
*axis1 = zero;
}
if(*axis2 < *axis1) {
/*swap*/
zero = *axis1;
*axis1 = *axis2;
*axis2 = zero;
}
}
}
/*Do not draw a zero length indicator but at least call the draw part events*/
if(!sym && indic_length_calc(&bar->indic_area) <= 1) {
lv_obj_draw_part_dsc_t part_draw_dsc;
lv_obj_draw_dsc_init(&part_draw_dsc, draw_ctx);
part_draw_dsc.part = LV_PART_INDICATOR;
part_draw_dsc.class_p = MY_CLASS;
part_draw_dsc.type = LV_BAR_DRAW_PART_INDICATOR;
part_draw_dsc.draw_area = &bar->indic_area;
lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc);
lv_event_send(obj, LV_EVENT_DRAW_PART_END, &part_draw_dsc);
return;
}
lv_area_t indic_area;
lv_area_copy(&indic_area, &bar->indic_area);
lv_draw_rect_dsc_t draw_rect_dsc;
lv_draw_rect_dsc_init(&draw_rect_dsc);
lv_obj_init_draw_rect_dsc(obj, LV_PART_INDICATOR, &draw_rect_dsc);
lv_obj_draw_part_dsc_t part_draw_dsc;
lv_obj_draw_dsc_init(&part_draw_dsc, draw_ctx);
part_draw_dsc.part = LV_PART_INDICATOR;
part_draw_dsc.class_p = MY_CLASS;
part_draw_dsc.type = LV_BAR_DRAW_PART_INDICATOR;
part_draw_dsc.rect_dsc = &draw_rect_dsc;
part_draw_dsc.draw_area = &bar->indic_area;
lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc);
lv_coord_t bg_radius = lv_obj_get_style_radius(obj, LV_PART_MAIN);
lv_coord_t short_side = LV_MIN(barw, barh);
if(bg_radius > short_side >> 1) bg_radius = short_side >> 1;
lv_coord_t indic_radius = draw_rect_dsc.radius;
short_side = LV_MIN(indicw, indich);
if(indic_radius > short_side >> 1) indic_radius = short_side >> 1;
/*Draw only the shadow and outline only if the indicator is long enough.
*The radius of the bg and the indicator can make a strange shape where
*it'd be very difficult to draw shadow.*/
if((hor && lv_area_get_width(&bar->indic_area) > indic_radius * 2) ||
(!hor && lv_area_get_height(&bar->indic_area) > indic_radius * 2)) {
lv_opa_t bg_opa = draw_rect_dsc.bg_opa;
lv_opa_t bg_img_opa = draw_rect_dsc.bg_img_opa;
lv_opa_t border_opa = draw_rect_dsc.border_opa;
draw_rect_dsc.bg_opa = LV_OPA_TRANSP;
draw_rect_dsc.bg_img_opa = LV_OPA_TRANSP;
draw_rect_dsc.border_opa = LV_OPA_TRANSP;
lv_draw_rect(draw_ctx, &draw_rect_dsc, &bar->indic_area);
draw_rect_dsc.bg_opa = bg_opa;
draw_rect_dsc.bg_img_opa = bg_img_opa;
draw_rect_dsc.border_opa = border_opa;
}
#if LV_DRAW_COMPLEX
lv_draw_mask_radius_param_t mask_bg_param;
lv_area_t bg_mask_area;
bg_mask_area.x1 = obj->coords.x1 + bg_left;
bg_mask_area.x2 = obj->coords.x2 - bg_right;
bg_mask_area.y1 = obj->coords.y1 + bg_top;
bg_mask_area.y2 = obj->coords.y2 - bg_bottom;
lv_draw_mask_radius_init(&mask_bg_param, &bg_mask_area, bg_radius, false);
lv_coord_t mask_bg_id = lv_draw_mask_add(&mask_bg_param, NULL);
#endif
/*Draw_only the background and background image*/
lv_opa_t shadow_opa = draw_rect_dsc.shadow_opa;
lv_opa_t border_opa = draw_rect_dsc.border_opa;
draw_rect_dsc.border_opa = LV_OPA_TRANSP;
draw_rect_dsc.shadow_opa = LV_OPA_TRANSP;
/*Get the max possible indicator area. The gradient should be applied on this*/
lv_area_t mask_indic_max_area;
lv_area_copy(&mask_indic_max_area, &bar_coords);
mask_indic_max_area.x1 += bg_left;
mask_indic_max_area.y1 += bg_top;
mask_indic_max_area.x2 -= bg_right;
mask_indic_max_area.y2 -= bg_bottom;
if(hor && lv_area_get_height(&mask_indic_max_area) < LV_BAR_SIZE_MIN) {
mask_indic_max_area.y1 = obj->coords.y1 + (barh / 2) - (LV_BAR_SIZE_MIN / 2);
mask_indic_max_area.y2 = mask_indic_max_area.y1 + LV_BAR_SIZE_MIN;
}
else if(!hor && lv_area_get_width(&mask_indic_max_area) < LV_BAR_SIZE_MIN) {
mask_indic_max_area.x1 = obj->coords.x1 + (barw / 2) - (LV_BAR_SIZE_MIN / 2);
mask_indic_max_area.x2 = mask_indic_max_area.x1 + LV_BAR_SIZE_MIN;
}
#if LV_DRAW_COMPLEX
/*Create a mask to the current indicator area to see only this part from the whole gradient.*/
lv_draw_mask_radius_param_t mask_indic_param;
lv_draw_mask_radius_init(&mask_indic_param, &bar->indic_area, draw_rect_dsc.radius, false);
int16_t mask_indic_id = lv_draw_mask_add(&mask_indic_param, NULL);
#endif
lv_draw_rect(draw_ctx, &draw_rect_dsc, &mask_indic_max_area);
draw_rect_dsc.border_opa = border_opa;
draw_rect_dsc.shadow_opa = shadow_opa;
/*Draw the border*/
draw_rect_dsc.bg_opa = LV_OPA_TRANSP;
draw_rect_dsc.bg_img_opa = LV_OPA_TRANSP;
draw_rect_dsc.shadow_opa = LV_OPA_TRANSP;
lv_draw_rect(draw_ctx, &draw_rect_dsc, &bar->indic_area);
#if LV_DRAW_COMPLEX
lv_draw_mask_free_param(&mask_indic_param);
lv_draw_mask_free_param(&mask_bg_param);
lv_draw_mask_remove_id(mask_indic_id);
lv_draw_mask_remove_id(mask_bg_id);
#endif
lv_event_send(obj, LV_EVENT_DRAW_PART_END, &part_draw_dsc);
}
static void lv_bar_event(const lv_obj_class_t * class_p, lv_event_t * e)
{
LV_UNUSED(class_p);
lv_res_t res;
/*Call the ancestor's event handler*/
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_REFR_EXT_DRAW_SIZE) {
lv_coord_t indic_size;
indic_size = lv_obj_calculate_ext_draw_size(obj, LV_PART_INDICATOR);
/*Bg size is handled by lv_obj*/
lv_coord_t * s = lv_event_get_param(e);
*s = LV_MAX(*s, indic_size);
/*Calculate the indicator area*/
lv_coord_t bg_left = lv_obj_get_style_pad_left(obj, LV_PART_MAIN);
lv_coord_t bg_right = lv_obj_get_style_pad_right(obj, LV_PART_MAIN);
lv_coord_t bg_top = lv_obj_get_style_pad_top(obj, LV_PART_MAIN);
lv_coord_t bg_bottom = lv_obj_get_style_pad_bottom(obj, LV_PART_MAIN);
lv_coord_t pad = LV_MIN4(bg_left, bg_right, bg_top, bg_bottom);
if(pad < 0) {
*s = LV_MAX(*s, -pad);
}
}
else if(code == LV_EVENT_PRESSED || code == LV_EVENT_RELEASED) {
lv_bar_t * bar = (lv_bar_t *)obj;
lv_obj_invalidate_area(obj, &bar->indic_area);
}
else if(code == LV_EVENT_DRAW_MAIN) {
draw_indic(e);
}
}
static void lv_bar_anim(void * var, int32_t value)
{
_lv_bar_anim_t * bar_anim = var;
bar_anim->anim_state = value;
lv_obj_invalidate(bar_anim->bar);
}
static void lv_bar_anim_ready(lv_anim_t * a)
{
_lv_bar_anim_t * var = a->var;
lv_obj_t * obj = (lv_obj_t *)var->bar;
lv_bar_t * bar = (lv_bar_t *)obj;
var->anim_state = LV_BAR_ANIM_STATE_INV;
if(var == &bar->cur_value_anim)
bar->cur_value = var->anim_end;
else if(var == &bar->start_value_anim)
bar->start_value = var->anim_end;
lv_obj_invalidate(var->bar);
}
static void lv_bar_set_value_with_anim(lv_obj_t * obj, int32_t new_value, int32_t * value_ptr,
_lv_bar_anim_t * anim_info, lv_anim_enable_t en)
{
if(en == LV_ANIM_OFF) {
*value_ptr = new_value;
lv_obj_invalidate((lv_obj_t *)obj);
}
else {
/*No animation in progress -> simply set the values*/
if(anim_info->anim_state == LV_BAR_ANIM_STATE_INV) {
anim_info->anim_start = *value_ptr;
anim_info->anim_end = new_value;
}
/*Animation in progress. Start from the animation end value*/
else {
anim_info->anim_start = anim_info->anim_end;
anim_info->anim_end = new_value;
}
*value_ptr = new_value;
/*Stop the previous animation if it exists*/
lv_anim_del(anim_info, NULL);
lv_anim_t a;
lv_anim_init(&a);
lv_anim_set_var(&a, anim_info);
lv_anim_set_exec_cb(&a, lv_bar_anim);
lv_anim_set_values(&a, LV_BAR_ANIM_STATE_START, LV_BAR_ANIM_STATE_END);
lv_anim_set_ready_cb(&a, lv_bar_anim_ready);
lv_anim_set_time(&a, lv_obj_get_style_anim_time(obj, LV_PART_MAIN));
lv_anim_start(&a);
}
}
static void lv_bar_init_anim(lv_obj_t * obj, _lv_bar_anim_t * bar_anim)
{
bar_anim->bar = obj;
bar_anim->anim_start = 0;
bar_anim->anim_end = 0;
bar_anim->anim_state = LV_BAR_ANIM_STATE_INV;
}
#endif
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