<commit_before>

/**
 * @file lv_bar.c
 *
 */

/*********************
 *      INCLUDES
 *********************/
#include "lv_bar.h"
#if LV_USE_BAR != 0

#include "../lv_draw/lv_draw.h"
#include "../lv_themes/lv_theme.h"
#include "../lv_misc/lv_anim.h"
#include "../lv_misc/lv_math.h"
#include <stdio.h>

/*********************
 *      DEFINES
 *********************/
#define LV_BAR_SIZE_MIN  4   /*hor. pad and ver. pad cannot make the indicator smaller then this [px]*/

/**********************
 *      TYPEDEFS
 **********************/

/**********************
 *  STATIC PROTOTYPES
 **********************/
static lv_design_res_t lv_bar_design(lv_obj_t * bar, const lv_area_t * clip_area, lv_design_mode_t mode);
static lv_res_t lv_bar_signal(lv_obj_t * bar, lv_signal_t sign, void * param);

static void draw_bg(lv_obj_t * bar, const lv_area_t * clip_area, lv_design_mode_t mode, lv_opa_t opa);
static void draw_indic(lv_obj_t * bar, const lv_area_t * clip_area, lv_design_mode_t mode, lv_opa_t opa);

#if LV_USE_ANIMATION
static void lv_bar_anim(void * bar, lv_anim_value_t value);
static void lv_bar_anim_ready(lv_anim_t * a);
#endif

/**********************
 *  STATIC VARIABLES
 **********************/
static lv_design_cb_t ancestor_design_f;
static lv_signal_cb_t ancestor_signal;

/**********************
 *      MACROS
 **********************/

/**********************
 *   GLOBAL FUNCTIONS
 **********************/

/**
 * Create a bar objects
 * @param par pointer to an object, it will be the parent of the new bar
 * @param copy pointer to a bar object, if not NULL then the new object will be copied from it
 * @return pointer to the created bar
 */
lv_obj_t * lv_bar_create(lv_obj_t * par, const lv_obj_t * copy)
{
    LV_LOG_TRACE("lv_bar create started");

    /*Create the ancestor basic object*/
    lv_obj_t * new_bar = lv_obj_create(par, copy);
    lv_mem_assert(new_bar);
    if(new_bar == NULL) return NULL;

    if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_cb(new_bar);
    if(ancestor_design_f == NULL) ancestor_design_f = lv_obj_get_design_cb(new_bar);

    /*Allocate the object type specific extended data*/
    lv_bar_ext_t * ext = lv_obj_allocate_ext_attr(new_bar, sizeof(lv_bar_ext_t));
    lv_mem_assert(ext);
    if(ext == NULL) return NULL;

    ext->min_value = 0;
    ext->max_value = 100;
    ext->cur_value = 0;
#if LV_USE_ANIMATION
    ext->anim_time  = 200;
    ext->anim_start = 0;
    ext->anim_end   = 0;
    ext->anim_state = LV_BAR_ANIM_STATE_INV;
#endif
    ext->sym         = 0;
    ext->style_indic = &lv_style_pretty_color;

    lv_obj_set_signal_cb(new_bar, lv_bar_signal);
    lv_obj_set_design_cb(new_bar, lv_bar_design);

    /*Init the new  bar object*/
    if(copy == NULL) {
        lv_obj_set_click(new_bar, false);
        lv_obj_set_size(new_bar, LV_DPI * 2, LV_DPI / 3);
        lv_bar_set_value(new_bar, ext->cur_value, false);

        lv_theme_t * th = lv_theme_get_current();
        if(th) {
            lv_bar_set_style(new_bar, LV_BAR_STYLE_BG, th->style.bar.bg);
            lv_bar_set_style(new_bar, LV_BAR_STYLE_INDIC, th->style.bar.indic);
        } else {
            lv_obj_set_style(new_bar, &lv_style_pretty);
        }
    } else {
        lv_bar_ext_t * ext_copy = lv_obj_get_ext_attr(copy);
        ext->min_value          = ext_copy->min_value;
        ext->max_value          = ext_copy->max_value;
        ext->cur_value          = ext_copy->cur_value;
        ext->style_indic        = ext_copy->style_indic;
        ext->sym                = ext_copy->sym;
        /*Refresh the style with new signal function*/
        lv_obj_refresh_style(new_bar);

        lv_bar_set_value(new_bar, ext->cur_value, false);
    }

    LV_LOG_INFO("bar created");

    return new_bar;
}

/*=====================
 * Setter functions
 *====================*/

/**
 * Set a new value on the bar
 * @param bar pointer to a bar object
 * @param value new value
 * @param anim LV_ANIM_ON: set the value with an animation; LV_ANIM_OFF: change the value immediatelly
 */
void lv_bar_set_value(lv_obj_t * bar, int16_t value, lv_anim_enable_t anim)
{
#if LV_USE_ANIMATION == 0
    anim = false;
#endif
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
    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;

    if(anim == LV_ANIM_OFF) {
        ext->cur_value = new_value;
        lv_obj_invalidate(bar);
    } else {
#if LV_USE_ANIMATION
        /*No animation in progress -> simply set the values*/
        if(ext->anim_state == LV_BAR_ANIM_STATE_INV) {
            ext->anim_start = ext->cur_value;
            ext->anim_end   = new_value;
        }
        /*Animation in progress. Start from the animation end value*/
        else {
            ext->anim_start = ext->anim_end;
            ext->anim_end   = new_value;
        }

        lv_anim_t a;
        a.var            = bar;
        a.start          = LV_BAR_ANIM_STATE_START;
        a.end            = LV_BAR_ANIM_STATE_END;
        a.exec_cb        = (lv_anim_exec_xcb_t)lv_bar_anim;
        a.path_cb        = lv_anim_path_linear;
        a.ready_cb       = lv_bar_anim_ready;
        a.act_time       = 0;
        a.time           = ext->anim_time;
        a.playback       = 0;
        a.playback_pause = 0;
        a.repeat         = 0;
        a.repeat_pause   = 0;

        lv_anim_create(&a);
#endif
    }
}

/**
 * Set minimum and the maximum values of a bar
 * @param bar pointer to the bar object
 * @param min minimum value
 * @param max maximum value
 */
void lv_bar_set_range(lv_obj_t * bar, int16_t min, int16_t max)
{
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
    if(ext->min_value == min && ext->max_value == max) return;

    ext->max_value = max;
    ext->min_value = min;
    if(ext->cur_value > max) {
        ext->cur_value = max;
        lv_bar_set_value(bar, ext->cur_value, false);
    }
    if(ext->cur_value < min) {
        ext->cur_value = min;
        lv_bar_set_value(bar, ext->cur_value, false);
    }
    lv_obj_invalidate(bar);
}

/**
 * Make the bar symmetric to zero. The indicator will grow from zero instead of the minimum
 * position.
 * @param bar pointer to a bar object
 * @param en true: enable disable symmetric behavior; false: disable
 */
void lv_bar_set_sym(lv_obj_t * bar, bool en)
{
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
    ext->sym           = en ? 1 : 0;
}

/**
 * Set the animation time of the bar
 * @param bar pointer to a bar object
 * @param anim_time the animation time in milliseconds.
 */
void lv_bar_set_anim_time(lv_obj_t * bar, uint16_t anim_time)
{
#if LV_USE_ANIMATION
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
    ext->anim_time     = anim_time;
#else
    (void)bar;       /*Unused*/
    (void)anim_time; /*Unused*/
#endif
}

/**
 * Set a style of a bar
 * @param bar pointer to a bar object
 * @param type which style should be set
 * @param style pointer to a style
 */
void lv_bar_set_style(lv_obj_t * bar, lv_bar_style_t type, const lv_style_t * style)
{
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);

    switch(type) {
        case LV_BAR_STYLE_BG: lv_obj_set_style(bar, style); break;
        case LV_BAR_STYLE_INDIC:
            ext->style_indic = style;
            lv_obj_refresh_ext_draw_pad(bar);
            break;
    }
}

/*=====================
 * Getter functions
 *====================*/

/**
 * Get the value of a bar
 * @param bar pointer to a bar object
 * @return the value of the bar
 */
int16_t lv_bar_get_value(const lv_obj_t * bar)
{
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
    /*If animated tell that it's already at the end value*/
#if LV_USE_ANIMATION
    if(ext->anim_state != LV_BAR_ANIM_STATE_INV) return ext->anim_end;
#endif
    /*No animation, simple return the current value*/
    return ext->cur_value;
}

/**
 * Get the minimum value of a bar
 * @param bar pointer to a bar object
 * @return the minimum value of the bar
 */
int16_t lv_bar_get_min_value(const lv_obj_t * bar)
{
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
    return ext->min_value;
}

/**
 * Get the maximum value of a bar
 * @param bar pointer to a bar object
 * @return the maximum value of the bar
 */
int16_t lv_bar_get_max_value(const lv_obj_t * bar)
{
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
    return ext->max_value;
}

/**
 * Get whether the bar is symmetric or not.
 * @param bar pointer to a bar object
 * @return true: symmetric is enabled; false: disable
 */
bool lv_bar_get_sym(lv_obj_t * bar)
{
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
    return ext->sym ? true : false;
}

/**
 * Get the animation time of the bar
 * @param bar pointer to a bar object
 * @return the animation time in milliseconds.
 */
uint16_t lv_bar_get_anim_time(lv_obj_t * bar)
{
#if LV_USE_ANIMATION
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
    return ext->anim_time;
#else
    (void)bar;       /*Unused*/
    return 0;
#endif
}

/**
 * Get a style of a bar
 * @param bar pointer to a bar object
 * @param type which style should be get
 * @return style pointer to a style
 */
const lv_style_t * lv_bar_get_style(const lv_obj_t * bar, lv_bar_style_t type)
{
    const lv_style_t * style = NULL;
    lv_bar_ext_t * ext       = lv_obj_get_ext_attr(bar);

    switch(type) {
        case LV_BAR_STYLE_BG: style = lv_obj_get_style(bar); break;
        case LV_BAR_STYLE_INDIC: style = ext->style_indic; break;
        default: style = NULL; break;
    }

    return style;
}

/**********************
 *   STATIC FUNCTIONS
 **********************/

/**
 * Handle the drawing related tasks of the bars
 * @param bar 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_bar_design(lv_obj_t * bar, const lv_area_t * clip_area, lv_design_mode_t mode)
{
    if(mode == LV_DESIGN_COVER_CHK) {
        /*Return false if the object is not covers the mask area*/
        return ancestor_design_f(bar, clip_area, mode);
    } else if(mode == LV_DESIGN_DRAW_MAIN) {
        lv_opa_t opa_scale = lv_obj_get_opa_scale(bar);

        draw_bg(bar, clip_area, mode, opa_scale);
        draw_indic(bar, clip_area, mode, opa_scale);

#if LV_USE_GROUP
        /*Draw the border*/
        if(lv_obj_is_focused(bar)) {
            lv_opa_t opa_scale          = lv_obj_get_opa_scale(bar);
            const lv_style_t * style_bg = lv_bar_get_style(bar, LV_BAR_STYLE_BG);
            lv_style_t style_tmp;
            lv_style_copy(&style_tmp, style_bg);
            style_tmp.body.opa          = LV_OPA_TRANSP;
            style_tmp.body.shadow.width = 0;
            lv_draw_rect(&bar->coords, clip_area, &style_tmp, opa_scale);
        }
#endif

    } else if(mode == LV_DESIGN_DRAW_POST) {

    }
    return LV_DESIGN_RES_OK;
}

static void draw_bg(lv_obj_t * bar, const lv_area_t * clip_area, lv_design_mode_t mode, lv_opa_t opa)
{

#if LV_USE_GROUP == 0
        /*Simply draw the background*/
        ancestor_design_f(bar, mask, mode);
#else
        /* Draw the borders later if the bar is focused.
         * At value = 100% the indicator can cover to whole background and the focused style won't
         * be visible*/
        if(lv_obj_is_focused(bar)) {
            const lv_style_t * style_bg = lv_bar_get_style(bar, LV_BAR_STYLE_BG);
            lv_style_t style_tmp;
            lv_style_copy(&style_tmp, style_bg);
            style_tmp.body.border.width = 0;
            lv_draw_rect(&bar->coords, clip_area, &style_tmp, opa);
        } else {
            ancestor_design_f(bar, clip_area, mode);
        }
#endif
}

static void draw_indic(lv_obj_t * bar, const lv_area_t * clip_area, lv_design_mode_t mode, lv_opa_t opa)
{
    (void) mode; /*Unused*/

    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);

    lv_coord_t objw = lv_obj_get_width(bar);
    lv_coord_t objh = lv_obj_get_height(bar);
    int32_t range = ext->max_value - ext->min_value;
    bool hor = objw >= objh ? true : false;
    bool sym = false;
    if(ext->sym && ext->min_value < 0 && ext->max_value > 0) sym = true;

    bool anim = false;
#if LV_USE_ANIMATION
    if(ext->anim_state != LV_BAR_ANIM_STATE_INV) anim = true;
#endif

    /*Calculate the indicator area*/
    lv_area_copy(&ext->indic_area, &bar->coords);
    const lv_style_t * style_indic = lv_bar_get_style(bar, LV_BAR_STYLE_INDIC);

    /*Respect padding and minimum width/height too*/
    ext->indic_area.x1 += style_indic->body.padding.left;
    ext->indic_area.x2 -= style_indic->body.padding.right;
    ext->indic_area.y1 += style_indic->body.padding.top;
    ext->indic_area.y2 -= style_indic->body.padding.bottom;

    if(hor && lv_area_get_height(&ext->indic_area) < LV_BAR_SIZE_MIN) {
        ext->indic_area.y1 = bar->coords.y1 + (objh / 2) - (LV_BAR_SIZE_MIN / 2);
        ext->indic_area.y2 = ext->indic_area.y1 + LV_BAR_SIZE_MIN;
    } else if(!hor && lv_area_get_width(&ext->indic_area) < LV_BAR_SIZE_MIN) {
        ext->indic_area.x1 = bar->coords.x1 + (objw / 2) - (LV_BAR_SIZE_MIN / 2);
        ext->indic_area.x2 = ext->indic_area.x1 + LV_BAR_SIZE_MIN;
    }

    lv_coord_t indicw = lv_area_get_width(&ext->indic_area);
    lv_coord_t indich = lv_area_get_height(&ext->indic_area);

    /*Calculate the indicator length*/
    lv_coord_t indic_length;
    if(anim) {
#if LV_USE_ANIMATION
        /*Calculate the coordinates of anim. start and end*/
        lv_coord_t anim_start_v = (int32_t)((int32_t)(hor ? indicw : indich) *
                (ext->anim_start - ext->min_value)) / range;
        lv_coord_t anim_end_v = (int32_t)((int32_t)(hor ? indicw : indich) *
                (ext->anim_end - ext->min_value)) / range;

        /*Calculate the real position based on `anim_state` (between `anim_start` and
         * `anim_end`)*/
        indic_length = anim_start_v + (((anim_end_v - anim_start_v) * ext->anim_state) >> LV_BAR_ANIM_STATE_NORM);
#endif
    }
    else
    {
        indic_length = (int32_t)((int32_t)(hor ? indicw : indich) * (ext->cur_value - ext->min_value)) /
                (ext->max_value - ext->min_value);
    }

    /*Horizontal bar*/
    if(hor) {
        ext->indic_area.x2 = ext->indic_area.x1 + indic_length - 1;
        if(sym) {
            lv_coord_t zero;
            zero = ext->indic_area.x1 + (-ext->min_value * indicw) / range;
            if(ext->indic_area.x2 > zero)
                ext->indic_area.x1 = zero;
            else {
                ext->indic_area.x1 = ext->indic_area.x2;
                ext->indic_area.x2 = zero;
            }
        }
    }
    /*Vertical bar*/
    else {
        ext->indic_area.y1 = ext->indic_area.y2 - indic_length + 1;
        if(sym) {
            lv_coord_t zero;
            zero = ext->indic_area.y2 - (-ext->min_value * objh) / range;
            if(ext->indic_area.y1 < zero)
                ext->indic_area.y2 = zero;
            else {
                ext->indic_area.y2 = ext->indic_area.y1;
                ext->indic_area.y1 = zero;
            }
        }
    }

    /*Draw the indicator*/

    /*Do not draw a zero length indicator*/
    if(!sym && indic_length == 0) return;

    /* Create a mask to the background.
     * It would look ugly if the indicator overflows on the rounded corners */
    lv_area_t mask_bg_area;
    lv_area_copy(&mask_bg_area, &bar->coords);
    mask_bg_area.x1 -= style_indic->body.shadow.width;
    mask_bg_area.y1 -= style_indic->body.shadow.width;
    mask_bg_area.x2 += style_indic->body.shadow.width;
    mask_bg_area.y2 += style_indic->body.shadow.width;

    if(style_indic->body.shadow.offset.x > 0) mask_bg_area.x1 += style_indic->body.shadow.offset.x;
    else mask_bg_area.x2 -= style_indic->body.shadow.offset.x;

    if(style_indic->body.shadow.offset.y > 0) mask_bg_area.y1 += style_indic->body.shadow.offset.y;
    else mask_bg_area.y2 -= style_indic->body.shadow.offset.y;

    lv_draw_mask_param_t mask_bg_param;
    lv_draw_mask_radius_init(&mask_bg_param, &mask_bg_area,style_indic->body.radius, false);
    int16_t mask_bg_id = lv_draw_mask_add(&mask_bg_param, NULL);

    /*If the indicator has a gradient along the longed side,
     * mask out only the current indicator area from the big gradient.*/
    if((objw > objh && style_indic->body.grad_dir == LV_GRAD_DIR_HOR) ||
       (objh > objw && style_indic->body.grad_dir == LV_GRAD_DIR_VER)) {

        lv_style_t style_indic_tmp;
        lv_style_copy(&style_indic_tmp, style_indic);

        /*Draw only the shadow*/
        style_indic_tmp.body.opa = LV_OPA_TRANSP;
        style_indic_tmp.body.border.width = 0;
        lv_draw_rect(&ext->indic_area, clip_area, &style_indic_tmp, opa);

        /*Draw_only the background*/
        /*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 += style_indic->body.padding.left;
        mask_indic_max_area.y1 += style_indic->body.padding.top;
        mask_indic_max_area.x2 -= style_indic->body.padding.right;
        mask_indic_max_area.y2 -= style_indic->body.padding.bottom;

        /*Create a mask to the current indicator area. This is see only this part from the whole gradient.*/
        lv_draw_mask_param_t mask_indic_param;
        lv_draw_mask_radius_init(&mask_indic_param, &ext->indic_area, style_indic->body.radius, false);
        int16_t mask_indic_id = lv_draw_mask_add(&mask_indic_param, NULL);

        style_indic_tmp.body.shadow.width = 0;
        style_indic_tmp.body.opa = style_indic->body.opa;
        lv_draw_rect(&mask_indic_max_area, clip_area, &style_indic_tmp, opa);
<commit_msg>lv_bar: indicator draw fixes<commit_after>

/**
 * @file lv_bar.c
 *
 */

/*********************
 *      INCLUDES
 *********************/
#include "lv_bar.h"
#if LV_USE_BAR != 0

#include "../lv_draw/lv_draw.h"
#include "../lv_themes/lv_theme.h"
#include "../lv_misc/lv_anim.h"
#include "../lv_misc/lv_math.h"
#include <stdio.h>

/*********************
 *      DEFINES
 *********************/
#define LV_BAR_SIZE_MIN  4   /*hor. pad and ver. pad cannot make the indicator smaller then this [px]*/

/**********************
 *      TYPEDEFS
 **********************/

/**********************
 *  STATIC PROTOTYPES
 **********************/
static lv_design_res_t lv_bar_design(lv_obj_t * bar, const lv_area_t * clip_area, lv_design_mode_t mode);
static lv_res_t lv_bar_signal(lv_obj_t * bar, lv_signal_t sign, void * param);

static void draw_bg(lv_obj_t * bar, const lv_area_t * clip_area, lv_design_mode_t mode, lv_opa_t opa);
static void draw_indic(lv_obj_t * bar, const lv_area_t * clip_area, lv_design_mode_t mode, lv_opa_t opa);

#if LV_USE_ANIMATION
static void lv_bar_anim(void * bar, lv_anim_value_t value);
static void lv_bar_anim_ready(lv_anim_t * a);
#endif

/**********************
 *  STATIC VARIABLES
 **********************/
static lv_design_cb_t ancestor_design_f;
static lv_signal_cb_t ancestor_signal;

/**********************
 *      MACROS
 **********************/

/**********************
 *   GLOBAL FUNCTIONS
 **********************/

/**
 * Create a bar objects
 * @param par pointer to an object, it will be the parent of the new bar
 * @param copy pointer to a bar object, if not NULL then the new object will be copied from it
 * @return pointer to the created bar
 */
lv_obj_t * lv_bar_create(lv_obj_t * par, const lv_obj_t * copy)
{
    LV_LOG_TRACE("lv_bar create started");

    /*Create the ancestor basic object*/
    lv_obj_t * new_bar = lv_obj_create(par, copy);
    lv_mem_assert(new_bar);
    if(new_bar == NULL) return NULL;

    if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_cb(new_bar);
    if(ancestor_design_f == NULL) ancestor_design_f = lv_obj_get_design_cb(new_bar);

    /*Allocate the object type specific extended data*/
    lv_bar_ext_t * ext = lv_obj_allocate_ext_attr(new_bar, sizeof(lv_bar_ext_t));
    lv_mem_assert(ext);
    if(ext == NULL) return NULL;

    ext->min_value = 0;
    ext->max_value = 100;
    ext->cur_value = 0;
#if LV_USE_ANIMATION
    ext->anim_time  = 200;
    ext->anim_start = 0;
    ext->anim_end   = 0;
    ext->anim_state = LV_BAR_ANIM_STATE_INV;
#endif
    ext->sym         = 0;
    ext->style_indic = &lv_style_pretty_color;

    lv_obj_set_signal_cb(new_bar, lv_bar_signal);
    lv_obj_set_design_cb(new_bar, lv_bar_design);

    /*Init the new  bar object*/
    if(copy == NULL) {
        lv_obj_set_click(new_bar, false);
        lv_obj_set_size(new_bar, LV_DPI * 2, LV_DPI / 3);
        lv_bar_set_value(new_bar, ext->cur_value, false);

        lv_theme_t * th = lv_theme_get_current();
        if(th) {
            lv_bar_set_style(new_bar, LV_BAR_STYLE_BG, th->style.bar.bg);
            lv_bar_set_style(new_bar, LV_BAR_STYLE_INDIC, th->style.bar.indic);
        } else {
            lv_obj_set_style(new_bar, &lv_style_pretty);
        }
    } else {
        lv_bar_ext_t * ext_copy = lv_obj_get_ext_attr(copy);
        ext->min_value          = ext_copy->min_value;
        ext->max_value          = ext_copy->max_value;
        ext->cur_value          = ext_copy->cur_value;
        ext->style_indic        = ext_copy->style_indic;
        ext->sym                = ext_copy->sym;
        /*Refresh the style with new signal function*/
        lv_obj_refresh_style(new_bar);

        lv_bar_set_value(new_bar, ext->cur_value, false);
    }

    LV_LOG_INFO("bar created");

    return new_bar;
}

/*=====================
 * Setter functions
 *====================*/

/**
 * Set a new value on the bar
 * @param bar pointer to a bar object
 * @param value new value
 * @param anim LV_ANIM_ON: set the value with an animation; LV_ANIM_OFF: change the value immediatelly
 */
void lv_bar_set_value(lv_obj_t * bar, int16_t value, lv_anim_enable_t anim)
{
#if LV_USE_ANIMATION == 0
    anim = false;
#endif
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
    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;

    if(anim == LV_ANIM_OFF) {
        ext->cur_value = new_value;
        lv_obj_invalidate(bar);
    } else {
#if LV_USE_ANIMATION
        /*No animation in progress -> simply set the values*/
        if(ext->anim_state == LV_BAR_ANIM_STATE_INV) {
            ext->anim_start = ext->cur_value;
            ext->anim_end   = new_value;
        }
        /*Animation in progress. Start from the animation end value*/
        else {
            ext->anim_start = ext->anim_end;
            ext->anim_end   = new_value;
        }

        lv_anim_t a;
        a.var            = bar;
        a.start          = LV_BAR_ANIM_STATE_START;
        a.end            = LV_BAR_ANIM_STATE_END;
        a.exec_cb        = (lv_anim_exec_xcb_t)lv_bar_anim;
        a.path_cb        = lv_anim_path_linear;
        a.ready_cb       = lv_bar_anim_ready;
        a.act_time       = 0;
        a.time           = ext->anim_time;
        a.playback       = 0;
        a.playback_pause = 0;
        a.repeat         = 0;
        a.repeat_pause   = 0;

        lv_anim_create(&a);
#endif
    }
}

/**
 * Set minimum and the maximum values of a bar
 * @param bar pointer to the bar object
 * @param min minimum value
 * @param max maximum value
 */
void lv_bar_set_range(lv_obj_t * bar, int16_t min, int16_t max)
{
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
    if(ext->min_value == min && ext->max_value == max) return;

    ext->max_value = max;
    ext->min_value = min;
    if(ext->cur_value > max) {
        ext->cur_value = max;
        lv_bar_set_value(bar, ext->cur_value, false);
    }
    if(ext->cur_value < min) {
        ext->cur_value = min;
        lv_bar_set_value(bar, ext->cur_value, false);
    }
    lv_obj_invalidate(bar);
}

/**
 * Make the bar symmetric to zero. The indicator will grow from zero instead of the minimum
 * position.
 * @param bar pointer to a bar object
 * @param en true: enable disable symmetric behavior; false: disable
 */
void lv_bar_set_sym(lv_obj_t * bar, bool en)
{
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
    ext->sym           = en ? 1 : 0;
}

/**
 * Set the animation time of the bar
 * @param bar pointer to a bar object
 * @param anim_time the animation time in milliseconds.
 */
void lv_bar_set_anim_time(lv_obj_t * bar, uint16_t anim_time)
{
#if LV_USE_ANIMATION
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
    ext->anim_time     = anim_time;
#else
    (void)bar;       /*Unused*/
    (void)anim_time; /*Unused*/
#endif
}

/**
 * Set a style of a bar
 * @param bar pointer to a bar object
 * @param type which style should be set
 * @param style pointer to a style
 */
void lv_bar_set_style(lv_obj_t * bar, lv_bar_style_t type, const lv_style_t * style)
{
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);

    switch(type) {
        case LV_BAR_STYLE_BG: lv_obj_set_style(bar, style); break;
        case LV_BAR_STYLE_INDIC:
            ext->style_indic = style;
            lv_obj_refresh_ext_draw_pad(bar);
            break;
    }
}

/*=====================
 * Getter functions
 *====================*/

/**
 * Get the value of a bar
 * @param bar pointer to a bar object
 * @return the value of the bar
 */
int16_t lv_bar_get_value(const lv_obj_t * bar)
{
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
    /*If animated tell that it's already at the end value*/
#if LV_USE_ANIMATION
    if(ext->anim_state != LV_BAR_ANIM_STATE_INV) return ext->anim_end;
#endif
    /*No animation, simple return the current value*/
    return ext->cur_value;
}

/**
 * Get the minimum value of a bar
 * @param bar pointer to a bar object
 * @return the minimum value of the bar
 */
int16_t lv_bar_get_min_value(const lv_obj_t * bar)
{
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
    return ext->min_value;
}

/**
 * Get the maximum value of a bar
 * @param bar pointer to a bar object
 * @return the maximum value of the bar
 */
int16_t lv_bar_get_max_value(const lv_obj_t * bar)
{
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
    return ext->max_value;
}

/**
 * Get whether the bar is symmetric or not.
 * @param bar pointer to a bar object
 * @return true: symmetric is enabled; false: disable
 */
bool lv_bar_get_sym(lv_obj_t * bar)
{
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
    return ext->sym ? true : false;
}

/**
 * Get the animation time of the bar
 * @param bar pointer to a bar object
 * @return the animation time in milliseconds.
 */
uint16_t lv_bar_get_anim_time(lv_obj_t * bar)
{
#if LV_USE_ANIMATION
    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);
    return ext->anim_time;
#else
    (void)bar;       /*Unused*/
    return 0;
#endif
}

/**
 * Get a style of a bar
 * @param bar pointer to a bar object
 * @param type which style should be get
 * @return style pointer to a style
 */
const lv_style_t * lv_bar_get_style(const lv_obj_t * bar, lv_bar_style_t type)
{
    const lv_style_t * style = NULL;
    lv_bar_ext_t * ext       = lv_obj_get_ext_attr(bar);

    switch(type) {
        case LV_BAR_STYLE_BG: style = lv_obj_get_style(bar); break;
        case LV_BAR_STYLE_INDIC: style = ext->style_indic; break;
        default: style = NULL; break;
    }

    return style;
}

/**********************
 *   STATIC FUNCTIONS
 **********************/

/**
 * Handle the drawing related tasks of the bars
 * @param bar 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_bar_design(lv_obj_t * bar, const lv_area_t * clip_area, lv_design_mode_t mode)
{
    if(mode == LV_DESIGN_COVER_CHK) {
        /*Return false if the object is not covers the mask area*/
        return ancestor_design_f(bar, clip_area, mode);
    } else if(mode == LV_DESIGN_DRAW_MAIN) {
        lv_opa_t opa_scale = lv_obj_get_opa_scale(bar);

        draw_bg(bar, clip_area, mode, opa_scale);
        draw_indic(bar, clip_area, mode, opa_scale);

#if LV_USE_GROUP
        /*Draw the border*/
        if(lv_obj_is_focused(bar)) {
            lv_opa_t opa_scale          = lv_obj_get_opa_scale(bar);
            const lv_style_t * style_bg = lv_bar_get_style(bar, LV_BAR_STYLE_BG);
            lv_style_t style_tmp;
            lv_style_copy(&style_tmp, style_bg);
            style_tmp.body.opa          = LV_OPA_TRANSP;
            style_tmp.body.shadow.width = 0;
            lv_draw_rect(&bar->coords, clip_area, &style_tmp, opa_scale);
        }
#endif

    } else if(mode == LV_DESIGN_DRAW_POST) {

    }
    return LV_DESIGN_RES_OK;
}

static void draw_bg(lv_obj_t * bar, const lv_area_t * clip_area, lv_design_mode_t mode, lv_opa_t opa)
{

#if LV_USE_GROUP == 0
        /*Simply draw the background*/
        ancestor_design_f(bar, mask, mode);
#else
        /* Draw the borders later if the bar is focused.
         * At value = 100% the indicator can cover to whole background and the focused style won't
         * be visible*/
        if(lv_obj_is_focused(bar)) {
            const lv_style_t * style_bg = lv_bar_get_style(bar, LV_BAR_STYLE_BG);
            lv_style_t style_tmp;
            lv_style_copy(&style_tmp, style_bg);
            style_tmp.body.border.width = 0;
            lv_draw_rect(&bar->coords, clip_area, &style_tmp, opa);
        } else {
            ancestor_design_f(bar, clip_area, mode);
        }
#endif
}

static void draw_indic(lv_obj_t * bar, const lv_area_t * clip_area, lv_design_mode_t mode, lv_opa_t opa)
{
    (void) mode; /*Unused*/

    lv_bar_ext_t * ext = lv_obj_get_ext_attr(bar);

    lv_coord_t objw = lv_obj_get_width(bar);
    lv_coord_t objh = lv_obj_get_height(bar);
    int32_t range = ext->max_value - ext->min_value;
    bool hor = objw >= objh ? true : false;
    bool sym = false;
    if(ext->sym && ext->min_value < 0 && ext->max_value > 0) sym = true;

    bool anim = false;
#if LV_USE_ANIMATION
    if(ext->anim_state != LV_BAR_ANIM_STATE_INV) anim = true;
#endif

    /*Calculate the indicator area*/
    lv_area_copy(&ext->indic_area, &bar->coords);
    const lv_style_t * style_indic = lv_bar_get_style(bar, LV_BAR_STYLE_INDIC);

    /*Respect padding and minimum width/height too*/
    ext->indic_area.x1 += style_indic->body.padding.left;
    ext->indic_area.x2 -= style_indic->body.padding.right;
    ext->indic_area.y1 += style_indic->body.padding.top;
    ext->indic_area.y2 -= style_indic->body.padding.bottom;

    if(hor && lv_area_get_height(&ext->indic_area) < LV_BAR_SIZE_MIN) {
        ext->indic_area.y1 = bar->coords.y1 + (objh / 2) - (LV_BAR_SIZE_MIN / 2);
        ext->indic_area.y2 = ext->indic_area.y1 + LV_BAR_SIZE_MIN;
    } else if(!hor && lv_area_get_width(&ext->indic_area) < LV_BAR_SIZE_MIN) {
        ext->indic_area.x1 = bar->coords.x1 + (objw / 2) - (LV_BAR_SIZE_MIN / 2);
        ext->indic_area.x2 = ext->indic_area.x1 + LV_BAR_SIZE_MIN;
    }

    lv_coord_t indicw = lv_area_get_width(&ext->indic_area);
    lv_coord_t indich = lv_area_get_height(&ext->indic_area);

    /*Calculate the indicator length*/
    lv_coord_t indic_length;
    if(anim) {
#if LV_USE_ANIMATION
        /*Calculate the coordinates of anim. start and end*/
        lv_coord_t anim_start_v = (int32_t)((int32_t)(hor ? indicw : indich) *
                (ext->anim_start - ext->min_value)) / range;
        lv_coord_t anim_end_v = (int32_t)((int32_t)(hor ? indicw : indich) *
                (ext->anim_end - ext->min_value)) / range;

        /*Calculate the real position based on `anim_state` (between `anim_start` and
         * `anim_end`)*/
        indic_length = anim_start_v + (((anim_end_v - anim_start_v) * ext->anim_state) >> LV_BAR_ANIM_STATE_NORM);
#endif
    }
    else
    {
        indic_length = (int32_t)((int32_t)(hor ? indicw : indich) * (ext->cur_value - ext->min_value)) /
                (ext->max_value - ext->min_value);
    }

    /*Horizontal bar*/
    if(hor) {
        ext->indic_area.x2 = ext->indic_area.x1 + indic_length - 1;
        if(sym) {
            lv_coord_t zero;
            zero = ext->indic_area.x1 + (-ext->min_value * indicw) / range;
            if(ext->indic_area.x2 > zero)
                ext->indic_area.x1 = zero;
            else {
                ext->indic_area.x1 = ext->indic_area.x2;
                ext->indic_area.x2 = zero;
            }
        }
    }
    /*Vertical bar*/
    else {
        ext->indic_area.y1 = ext->indic_area.y2 - indic_length + 1;
        if(sym) {
            lv_coord_t zero;
            zero = ext->indic_area.y2 - (-ext->min_value * objh) / range;
            if(ext->indic_area.y1 < zero)
                ext->indic_area.y2 = zero;
            else {
                ext->indic_area.y2 = ext->indic_area.y1;
                ext->indic_area.y1 = zero;
            }
        }
    }

    /*Draw the indicator*/

    /*Do not draw a zero length indicator*/
    if(!sym && indic_length == 0) return;

    /* Create a mask to the background.
     * It would look ugly if the indicator overflows on the rounded corners */
    lv_area_t mask_bg_area;
    lv_area_copy(&mask_bg_area, &bar->coords);
    mask_bg_area.x1 -= style_indic->body.shadow.width;
    mask_bg_area.y1 -= style_indic->body.shadow.width;
    mask_bg_area.x2 += style_indic->body.shadow.width;
    mask_bg_area.y2 += style_indic->body.shadow.width;

    if(style_indic->body.shadow.offset.x > 0) mask_bg_area.x1 += style_indic->body.shadow.offset.x;
    else mask_bg_area.x2 -= style_indic->body.shadow.offset.x;

    if(style_indic->body.shadow.offset.y > 0) mask_bg_area.y1 += style_indic->body.shadow.offset.y;
    else mask_bg_area.y2 -= style_indic->body.shadow.offset.y;

    lv_draw_mask_param_t mask_bg_param;
    lv_draw_mask_radius_init(&mask_bg_param, &mask_bg_area,style_indic->body.radius, false);
    int16_t mask_bg_id = lv_draw_mask_add(&mask_bg_param, NULL);

    /*If the indicator has a gradient along the longed side,
     * mask out only the current indicator area from the big gradient.*/
    if((style_indic->body.main_color.full != style_indic->body.grad_color.full)  &&
       ((objw > objh && style_indic->body.grad_dir == LV_GRAD_DIR_HOR) ||
       (objh > objw && style_indic->body.grad_dir == LV_GRAD_DIR_VER))) {

        lv_style_t style_indic_tmp;
        lv_style_copy(&style_indic_tmp, style_indic);

        /*Draw only the shadow*/
        style_indic_tmp.body.opa = LV_OPA_TRANSP;
        style_indic_tmp.body.border.width = 0;
        lv_draw_rect(&ext->indic_area, clip_area, &style_indic_tmp, opa);

        /*Draw_only the background*/
        /*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 += style_indic->body.padding.left;
        mask_indic_max_area.y1 += style_indic->body.padding.top;
        mask_indic_max_area.x2 -= style_indic->body.padding.right;
        mask_indic_max_area.y2 -= style_indic->body.padding.bottom;

        /*Create a mask to the current indicator area. This is see only this part from the whole gradient.*/
        lv_draw_mask_param_t mask_indic_param;
        lv_draw_mask_radius_init(&mask_indic_param, &ext->indic_area, style_indic->body.radius, false);
        int16_t mask_indic_id = lv_draw_mask_add(&mask_indic_param, NULL);

        style_indic_tmp.body.shadow.width = 0;
        style_indic_tmp.body.opa = style_indic->body.opa;
        lv_draw_rect(&mask_indic_max_area, clip_area, &style_indic_tmp, opa);

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