/**
 * @file lv_btn.c
 *
 */

/*********************
 *      INCLUDES
 *********************/

#include "lv_btn.h"
#if USE_LV_BTN != 0

#include <string.h>
#include "../lv_core/lv_group.h"
#include "../lv_draw/lv_draw.h"
#include "../lv_themes/lv_theme.h"
#include "../lv_misc/lv_area.h"
#include "../lv_misc/lv_color.h"
#include "../lv_misc/lv_math.h"

/*********************
 *      DEFINES
 *********************/
#define LV_BTN_INK_VALUE_MAX            256
#define LV_BTN_INK_VALUE_MAX_SHIFT      8

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

/**********************
 *  STATIC PROTOTYPES
 **********************/
static bool lv_btn_design(lv_obj_t * btn, const lv_area_t * mask, lv_design_mode_t mode);
static lv_res_t lv_btn_signal(lv_obj_t * btn, lv_signal_t sign, void * param);

#if USE_LV_ANIMATION && LV_BTN_INK_EFFECT
static void lv_btn_ink_effect_anim(lv_obj_t * btn, int32_t val);
static void lv_btn_ink_effect_anim_ready(void * p);
#endif

/**********************
 *  STATIC VARIABLES
 **********************/
static lv_signal_func_t ancestor_signal;
static lv_design_func_t ancestor_design;

#if USE_LV_ANIMATION && LV_BTN_INK_EFFECT
static lv_coord_t ink_act_value;
static lv_obj_t * ink_obj;
static lv_btn_state_t ink_bg_state;
static lv_btn_state_t ink_top_state;
static bool ink_ready;
static bool ink_playback;
static lv_point_t ink_point;
#endif

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

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

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

    lv_obj_t * new_btn;

    new_btn = lv_cont_create(par, copy);
    lv_mem_assert(new_btn);
    if(new_btn == NULL) return NULL;

    if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_btn);
    if(ancestor_design == NULL) ancestor_design = lv_obj_get_design_func(new_btn);

    /*Allocate the extended data*/
    lv_btn_ext_t * ext = lv_obj_allocate_ext_attr(new_btn, sizeof(lv_btn_ext_t));
    lv_mem_assert(ext);
    if(ext == NULL) return NULL;

    ext->state = LV_BTN_STATE_REL;

    ext->actions[LV_BTN_ACTION_PR] = NULL;
    ext->actions[LV_BTN_ACTION_CLICK] = NULL;
    ext->actions[LV_BTN_ACTION_LONG_PR] = NULL;
    ext->actions[LV_BTN_ACTION_LONG_PR_REPEAT] = NULL;

    ext->styles[LV_BTN_STATE_REL] = &lv_style_btn_rel;
    ext->styles[LV_BTN_STATE_PR] = &lv_style_btn_pr;
    ext->styles[LV_BTN_STATE_TGL_REL] = &lv_style_btn_tgl_rel;
    ext->styles[LV_BTN_STATE_TGL_PR] = &lv_style_btn_tgl_pr;
    ext->styles[LV_BTN_STATE_INA] = &lv_style_btn_ina;

    ext->long_pr_action_executed = 0;
    ext->toggle = 0;
    ext->idx = 0;
#if USE_LV_ANIMATION && LV_BTN_INK_EFFECT
    ext->ink_in_time = 0;
    ext->ink_wait_time = 0;
    ext->ink_out_time = 0;
#endif

    lv_obj_set_signal_func(new_btn, lv_btn_signal);
    lv_obj_set_design_func(new_btn, lv_btn_design);

    /*If no copy do the basic initialization*/
    if(copy == NULL) {
        /*Set layout if the button is not a screen*/
        if(par != NULL) {
            lv_btn_set_layout(new_btn, LV_LAYOUT_CENTER);
        }

        lv_obj_set_click(new_btn, true);        /*Be sure the button is clickable*/

        /*Set the default styles*/
        lv_theme_t * th = lv_theme_get_current();
        if(th) {
            lv_btn_set_style(new_btn, LV_BTN_STYLE_REL, th->btn.rel);
            lv_btn_set_style(new_btn, LV_BTN_STYLE_PR, th->btn.pr);
            lv_btn_set_style(new_btn, LV_BTN_STYLE_TGL_REL, th->btn.tgl_rel);
            lv_btn_set_style(new_btn, LV_BTN_STYLE_TGL_PR, th->btn.tgl_pr);
            lv_btn_set_style(new_btn, LV_BTN_STYLE_INA, th->btn.ina);
        } else {
            lv_obj_set_style(new_btn, ext->styles[LV_BTN_STATE_REL]);
        }
    }
    /*Copy 'copy'*/
    else {
        lv_btn_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
        ext->state = copy_ext->state;
        ext->toggle = copy_ext->toggle;
#if USE_LV_ANIMATION && LV_BTN_INK_EFFECT
        ext->ink_in_time = copy_ext->ink_in_time;
        ext->ink_wait_time = copy_ext->ink_wait_time;
        ext->ink_out_time = copy_ext->ink_out_time;
#endif
        memcpy(ext->actions, copy_ext->actions, sizeof(ext->actions));
        memcpy(ext->styles, copy_ext->styles, sizeof(ext->styles));

        /*Refresh the style with new signal function*/
        lv_obj_refresh_style(new_btn);
    }

    LV_LOG_INFO("button created");

    return new_btn;
}

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

/**
 * Enable the toggled states
 * @param btn pointer to a button object
 * @param tgl true: enable toggled states, false: disable
 */
void lv_btn_set_toggle(lv_obj_t * btn, bool tgl)
{
    lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);

    ext->toggle = tgl != false ? 1 : 0;
}

/**
 * Set the state of the button
 * @param btn pointer to a button object
 * @param state the new state of the button (from lv_btn_state_t enum)
 */
void lv_btn_set_state(lv_obj_t * btn, lv_btn_state_t state)
{
    lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
    if(ext->state != state) {
        ext->state = state;
        lv_obj_set_style(btn, ext->styles[state]);
    }
}

/**
 * Toggle the state of the button (ON->OFF, OFF->ON)
 * @param btn pointer to a button object
 */
void lv_btn_toggle(lv_obj_t * btn)
{
    lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
    switch(ext->state) {
        case LV_BTN_STATE_REL:
            lv_btn_set_state(btn, LV_BTN_STATE_TGL_REL);
            break;
        case LV_BTN_STATE_PR:
            lv_btn_set_state(btn, LV_BTN_STATE_TGL_PR);
            break;
        case LV_BTN_STATE_TGL_REL:
            lv_btn_set_state(btn, LV_BTN_STATE_REL);
            break;
        case LV_BTN_STATE_TGL_PR:
            lv_btn_set_state(btn, LV_BTN_STATE_PR);
            break;
        default:
            break;
    }
}

/**
 * Set a function to call when a button event happens
 * @param btn pointer to a button object
 * @param action type of event form 'lv_action_t' (press, release, long press, long press repeat)
 */
void lv_btn_set_action(lv_obj_t * btn, lv_btn_action_t type, lv_action_t action)
{
    if(type >= LV_BTN_ACTION_NUM) return;

    lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
    ext->actions[type] = action;
}

/**
 * Set time of the ink effect (draw a circle on click to animate in the new state)
 * @param btn pointer to a button object
 * @param time the time of the ink animation
 */
void lv_btn_set_ink_in_time(lv_obj_t * btn, uint16_t time)
{
#if USE_LV_ANIMATION && LV_BTN_INK_EFFECT
    lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
    ext->ink_in_time = time;
#else
    (void)btn; /*Unused*/
    (void)time; /*Unused*/
    LV_LOG_WARN("`lv_btn_set_ink_ink_time` has no effect if LV_BTN_INK_EFEFCT or USE_LV_ANIMATION is disabled")
#endif
}

/**
 * Set the wait time before the ink disappears
 * @param btn pointer to a button object
 * @param time the time of the ink animation
 */
void lv_btn_set_ink_wait_time(lv_obj_t * btn, uint16_t time)
{

#if USE_LV_ANIMATION && LV_BTN_INK_EFFECT
    lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
    ext->ink_wait_time = time;
#else
    (void)btn; /*Unused*/
    (void)time; /*Unused*/
    LV_LOG_WARN("`lv_btn_set_ink_wait_time` has no effect if LV_BTN_INK_EFEFCT or USE_LV_ANIMATION is disabled")
#endif
}

/**
 * Set time of the ink out effect (animate to the released state)
 * @param btn pointer to a button object
 * @param time the time of the ink animation
 */
void lv_btn_set_ink_out_time(lv_obj_t * btn, uint16_t time)
{
#if USE_LV_ANIMATION && LV_BTN_INK_EFFECT
    lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
    ext->ink_out_time = time;
#else
    (void)btn; /*Unused*/
    (void)time; /*Unused*/
    LV_LOG_WARN("`lv_btn_set_ink_out_time` has no effect if LV_BTN_INK_EFEFCT or USE_LV_ANIMATION is disabled")
#endif
}

/**
 * Set a style of a button
 * @param btn pointer to a button object
 * @param type which style should be set
 * @param style pointer to a style
 */
void lv_btn_set_style(lv_obj_t * btn, lv_btn_style_t type, lv_style_t * style)
{
    lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);

    switch(type) {
        case LV_BTN_STYLE_REL:
            ext->styles[LV_BTN_STATE_REL] = style;
            break;
        case LV_BTN_STYLE_PR:
            ext->styles[LV_BTN_STATE_PR] = style;
            break;
        case LV_BTN_STYLE_TGL_REL:
            ext->styles[LV_BTN_STATE_TGL_REL] = style;
            break;
        case LV_BTN_STYLE_TGL_PR:
            ext->styles[LV_BTN_STATE_TGL_PR] = style;
            break;
        case LV_BTN_STYLE_INA:
            ext->styles[LV_BTN_STATE_INA] = style;
            break;
    }

    /*Refresh the object with the new style*/
    lv_obj_set_style(btn, ext->styles[ext->state]);
}


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

/**
 * Get the current state of the button
 * @param btn pointer to a button object
 * @return the state of the button (from lv_btn_state_t enum)
 */
lv_btn_state_t lv_btn_get_state(const lv_obj_t * btn)
{
    lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
    return ext->state;
}

/**
 * Get the toggle enable attribute of the button
 * @param btn pointer to a button object
 * @return ture: toggle enabled, false: disabled
 */
bool lv_btn_get_toggle(const lv_obj_t * btn)
{
    lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);

    return ext->toggle != 0 ? true : false;
}

/**
 * Get the release action of a button
 * @param btn pointer to a button object
 * @return pointer to the release action function
 */
lv_action_t lv_btn_get_action(const lv_obj_t * btn, lv_btn_action_t type)
{
    if(type >= LV_BTN_ACTION_NUM) return NULL;

    lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
    return ext->actions[type];
}

/**
 * Get time of the ink in effect (draw a circle on click to animate in the new state)
 * @param btn pointer to a button object
 * @return the time of the ink animation
 */
uint16_t lv_btn_get_ink_in_time(const lv_obj_t * btn)
{
#if USE_LV_ANIMATION && LV_BTN_INK_EFFECT
    lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
    return ext->ink_in_time;
#else
    (void)btn; /*Unused*/
    return 0;
#endif
}


/**
 * Get the wait time before the ink disappears
 * @param btn pointer to a button object
 * @return the time of the ink animation
 */
uint16_t lv_btn_get_ink_wait_time(const lv_obj_t * btn)
{
#if USE_LV_ANIMATION && LV_BTN_INK_EFFECT
    lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
    return ext->ink_wait_time;
#else
    (void)btn; /*Unused*/
    return 0;
#endif
}
/**
 * Get time of the ink out effect (animate to the releases state)
 * @param btn pointer to a button object
 * @return the time of the ink animation
 */
uint16_t lv_btn_get_ink_out_time(const lv_obj_t * btn)
{
#if USE_LV_ANIMATION && LV_BTN_INK_EFFECT
    lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
    return ext->ink_in_time;
#else
    (void)btn; /*Unused*/
    return 0;
#endif
}

/**
 * Get a style of a button
 * @param btn pointer to a button object
 * @param type which style should be get
 * @return style pointer to a style
 */
lv_style_t * lv_btn_get_style(const lv_obj_t * btn, lv_btn_style_t type)
{
    lv_style_t * style = NULL;
    lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);

    switch(type) {
        case LV_BTN_STYLE_REL:
            style = ext->styles[LV_BTN_STATE_REL];
            break;
        case LV_BTN_STYLE_PR:
            style = ext->styles[LV_BTN_STATE_PR];
            break;
        case LV_BTN_STYLE_TGL_REL:
            style = ext->styles[LV_BTN_STATE_TGL_REL];
            break;
        case LV_BTN_STYLE_TGL_PR:
            style = ext->styles[LV_BTN_STATE_TGL_PR];
            break;
        case LV_BTN_STYLE_INA:
            style = ext->styles[LV_BTN_STATE_INA];
            break;
        default:
            style = NULL;
            break;
    }

    return style;
}

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


/**
 * Handle the drawing related tasks of the drop down lists
 * @param btn pointer to an object
 * @param mask 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 true/false, depends on 'mode'
 */
static bool lv_btn_design(lv_obj_t * btn, const lv_area_t * mask, lv_design_mode_t mode)
{
    if(mode == LV_DESIGN_COVER_CHK) {
        return false;
    } else if(mode == LV_DESIGN_DRAW_MAIN) {

#if USE_LV_ANIMATION && LV_BTN_INK_EFFECT
        if(btn != ink_obj) {
            ancestor_design(btn, mask, mode);
        } else {
            lv_opa_t opa_scale = lv_obj_get_opa_scale(btn);
            lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);

            /*Draw the normal button*/
            if(ink_playback == false) {
                lv_style_t style_tmp;
                lv_style_copy(&style_tmp, ext->styles[ink_bg_state]);
                style_tmp.body.shadow.width = ext->styles[ink_top_state]->body.shadow.width;
                lv_draw_rect(&btn->coords, mask, &style_tmp, opa_scale);

                lv_coord_t w = lv_obj_get_width(btn);
                lv_coord_t h = lv_obj_get_height(btn);
                lv_coord_t r_max = LV_MATH_MIN(w, h) / 2;

                /*In the first part of the animation increase the size of the circle (ink effect) */
                lv_area_t cir_area;

                lv_coord_t coord_state = ink_act_value < LV_BTN_INK_VALUE_MAX / 2 ? ink_act_value : LV_BTN_INK_VALUE_MAX / 2;
                lv_point_t p_act;
                p_act.x = ink_point.x;
                p_act.y = ink_point.y;
                lv_coord_t x_err = (btn->coords.x1 + w / 2) - p_act.x;
                lv_coord_t y_err = (btn->coords.y1 + h / 2) - p_act.y;

                p_act.x += (x_err * coord_state) >> (LV_BTN_INK_VALUE_MAX_SHIFT - 1);
                p_act.y += (y_err * coord_state) >> (LV_BTN_INK_VALUE_MAX_SHIFT - 1);

                lv_coord_t half_side = LV_MATH_MAX(w, h) / 2;
                cir_area.x1 = p_act.x - ((half_side * coord_state) >> (LV_BTN_INK_VALUE_MAX_SHIFT - 1));
                cir_area.y1 = p_act.y - ((half_side * coord_state) >> (LV_BTN_INK_VALUE_MAX_SHIFT - 1));
                cir_area.x2 = p_act.x + ((half_side * coord_state) >> (LV_BTN_INK_VALUE_MAX_SHIFT - 1));
                cir_area.y2 = p_act.y + ((half_side * coord_state) >> (LV_BTN_INK_VALUE_MAX_SHIFT - 1));

                lv_area_intersect(&cir_area, &btn->coords, &cir_area);      /*Limit the area. (It might be too big on the smaller side)*/

                /*In the second part animate the radius. Circle -> body.radius*/
                lv_coord_t r_state = ink_act_value > LV_BTN_INK_VALUE_MAX / 2 ? ink_act_value - LV_BTN_INK_VALUE_MAX / 2 : 0;

                lv_style_copy(&style_tmp, ext->styles[ink_top_state]);
                style_tmp.body.radius = r_max + (((ext->styles[ink_bg_state]->body.radius - r_max) * r_state) >> (LV_BTN_INK_VALUE_MAX_SHIFT - 1));
                style_tmp.body.border.width = 0;

                /*Draw the circle*/
                lv_draw_rect(&cir_area, mask, &style_tmp, opa_scale);
            } else {
                lv_style_t res;
                lv_style_copy(&res, ext->styles[ink_bg_state]);
                lv_style_mix(ext->styles[ink_bg_state], ext->styles[ink_top_state], &res, ink_act_value);
                lv_draw_rect(&btn->coords, mask, &res, opa_scale);

            }
        }
#else
        ancestor_design(btn, mask, mode);
#endif
    } else if(mode == LV_DESIGN_DRAW_POST) {
        ancestor_design(btn, mask, mode);
    }

    return true;
}

/**
 * Signal function of the button
 * @param btn pointer to a button 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_btn_signal(lv_obj_t * btn, lv_signal_t sign, void * param)
{
    lv_res_t res;

    /* Include the ancient signal function */
    res = ancestor_signal(btn, sign, param);
    if(res != LV_RES_OK) return res;

    lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
    lv_btn_state_t state = lv_btn_get_state(btn);
    bool tgl = lv_btn_get_toggle(btn);

    if(sign == LV_SIGNAL_PRESSED) {
        /*Refresh the state*/
        if(ext->state == LV_BTN_STATE_REL) {
            lv_btn_set_state(btn, LV_BTN_STATE_PR);
#if USE_LV_ANIMATION && LV_BTN_INK_EFFECT
            ink_bg_state = LV_BTN_STATE_REL;
            ink_top_state = LV_BTN_STATE_PR;
#endif
        } else if(ext->state == LV_BTN_STATE_TGL_REL) {
            lv_btn_set_state(btn, LV_BTN_STATE_TGL_PR);
#if USE_LV_ANIMATION && LV_BTN_INK_EFFECT
            ink_bg_state = LV_BTN_STATE_TGL_REL;
            ink_top_state = LV_BTN_STATE_TGL_PR;
#endif
        }

        ext->long_pr_action_executed = 0;

#if USE_LV_ANIMATION && LV_BTN_INK_EFFECT
        /*Forget the old inked button*/
        if(ink_obj != NULL && ink_obj != btn) {
            lv_anim_del(ink_obj, (lv_anim_fp_t)lv_btn_ink_effect_anim);
            lv_obj_invalidate(ink_obj);
            ink_obj = NULL;
        }
        /*Save the new data for inking and start it's animation if enabled*/
        if(ext->ink_in_time > 0) {
            ink_obj = btn;
            ink_playback = false;
            ink_ready = false;
            lv_indev_get_point(lv_indev_get_act(), &ink_point);

            lv_anim_t a;
            a.var = btn;
            a.start = 0;
            a.end = LV_BTN_INK_VALUE_MAX;
            a.fp = (lv_anim_fp_t)lv_btn_ink_effect_anim;
            a.path = lv_anim_path_linear;
            a.end_cb = lv_btn_ink_effect_anim_ready;
            a.act_time = 0;
            a.time = ext->ink_in_time;
            a.playback = 0;
            a.playback_pause = 0;
            a.repeat = 0;
            a.repeat_pause = 0;
            lv_anim_create(&a);
        }
#endif
        /*Call the press action, 'param' is the caller indev_proc*/
        if(ext->actions[LV_BTN_ACTION_PR] && state != LV_BTN_STATE_INA) {
            res = ext->actions[LV_BTN_ACTION_PR](btn);
        }
    } else if(sign == LV_SIGNAL_PRESS_LOST) {
        /*Refresh the state*/
        if(ext->state == LV_BTN_STATE_PR) lv_btn_set_state(btn, LV_BTN_STATE_REL);
        else if(ext->state == LV_BTN_STATE_TGL_PR) lv_btn_set_state(btn, LV_BTN_STATE_TGL_REL);
    } else if(sign == LV_SIGNAL_PRESSING) {
        /*When the button begins to drag revert pressed states to released*/
        if(lv_indev_is_dragging(param) != false) {
            if(ext->state == LV_BTN_STATE_PR) lv_btn_set_state(btn, LV_BTN_STATE_REL);
            else if(ext->state == LV_BTN_STATE_TGL_PR) lv_btn_set_state(btn, LV_BTN_STATE_TGL_REL);
        }
    } else if(sign == LV_SIGNAL_RELEASED) {
        /*If not dragged and it was not long press action then
         *change state and run the action*/
        if(lv_indev_is_dragging(param) == false && ext->long_pr_action_executed == 0) {
            if(ext->state == LV_BTN_STATE_PR && tgl == false) {
                lv_btn_set_state(btn, LV_BTN_STATE_REL);
            } else if(ext->state == LV_BTN_STATE_TGL_PR && tgl == false) {
                lv_btn_set_state(btn, LV_BTN_STATE_TGL_REL);
            } else if(ext->state == LV_BTN_STATE_PR && tgl == true) {
                lv_btn_set_state(btn, LV_BTN_STATE_TGL_REL);
            } else if(ext->state == LV_BTN_STATE_TGL_PR && tgl == true) {
                lv_btn_set_state(btn, LV_BTN_STATE_REL);
            }

            if(ext->actions[LV_BTN_ACTION_CLICK] && state != LV_BTN_STATE_INA) {
                res = ext->actions[LV_BTN_ACTION_CLICK](btn);
            }
        } else { /*If dragged change back the state*/
            if(ext->state == LV_BTN_STATE_PR) {
                lv_btn_set_state(btn, LV_BTN_STATE_REL);
            } else if(ext->state == LV_BTN_STATE_TGL_PR) {
                lv_btn_set_state(btn, LV_BTN_STATE_TGL_REL);
            }
        }

#if USE_LV_ANIMATION && LV_BTN_INK_EFFECT
        /*Draw the toggled state in the inking instead*/
        if(ext->toggle) {
            ink_top_state = ext->state;
        }
        /*If not a toggle button and the "IN" inking is ready then start an "OUT" inking*/
        else if(ink_ready && ext->ink_out_time > 0) {
            ink_obj = btn;
            ink_playback = true;    /*It is the playback. If not set `lv_btn_ink_effect_anim_ready` will start its own playback*/
            lv_indev_get_point(lv_indev_get_act(), &ink_point);

            lv_anim_t a;
            a.var = ink_obj;
            a.start = LV_BTN_INK_VALUE_MAX;
            a.end = 0;
            a.fp = (lv_anim_fp_t)lv_btn_ink_effect_anim;
            a.path = lv_anim_path_linear;
            a.end_cb = lv_btn_ink_effect_anim_ready;
            a.act_time = 0;
            a.time = ext->ink_out_time;
            a.playback = 0;
            a.playback_pause = 0;
            a.repeat = 0;
            a.repeat_pause = 0;
            lv_anim_create(&a);
        }
#endif
    } else if(sign == LV_SIGNAL_LONG_PRESS) {
        if(ext->actions[LV_BTN_ACTION_LONG_PR] && state != LV_BTN_STATE_INA) {
            ext->long_pr_action_executed = 1;
            res = ext->actions[LV_BTN_ACTION_LONG_PR](btn);
        }
    } else if(sign == LV_SIGNAL_LONG_PRESS_REP) {
        if(ext->actions[LV_BTN_ACTION_LONG_PR_REPEAT] && state != LV_BTN_STATE_INA) {
            res = ext->actions[LV_BTN_ACTION_LONG_PR_REPEAT](btn);
        }
    } else if(sign == LV_SIGNAL_CONTROLL) {
        char c = *((char *)param);
        if(c == LV_GROUP_KEY_RIGHT || c == LV_GROUP_KEY_UP) {
            if(lv_btn_get_toggle(btn) != false) lv_btn_set_state(btn, LV_BTN_STATE_TGL_REL);
            if(ext->actions[LV_BTN_ACTION_CLICK] && lv_btn_get_state(btn) != LV_BTN_STATE_INA) {
                res = ext->actions[LV_BTN_ACTION_CLICK](btn);
            }
        } else if(c == LV_GROUP_KEY_LEFT || c == LV_GROUP_KEY_DOWN) {
            if(lv_btn_get_toggle(btn) != false) lv_btn_set_state(btn, LV_BTN_STATE_REL);
            if(ext->actions[LV_BTN_ACTION_CLICK] && lv_btn_get_state(btn) != LV_BTN_STATE_INA) {
                res = ext->actions[LV_BTN_ACTION_CLICK](btn);
            }
        } else if(c == LV_GROUP_KEY_ENTER) {
            if(!ext->long_pr_action_executed) {
                if(lv_btn_get_toggle(btn)) {
                    if(state == LV_BTN_STATE_REL || state == LV_BTN_STATE_PR) lv_btn_set_state(btn, LV_BTN_STATE_TGL_REL);
                    else if(state == LV_BTN_STATE_TGL_REL || state == LV_BTN_STATE_TGL_PR) lv_btn_set_state(btn, LV_BTN_STATE_REL);
                } else {
                    if(state == LV_BTN_STATE_REL || state == LV_BTN_STATE_PR) lv_btn_set_state(btn, LV_BTN_STATE_REL);
                    else if(state == LV_BTN_STATE_TGL_REL || state == LV_BTN_STATE_TGL_PR) lv_btn_set_state(btn, LV_BTN_STATE_TGL_REL);
                }
                if(ext->actions[LV_BTN_ACTION_CLICK] && state != LV_BTN_STATE_INA) {
                    res = ext->actions[LV_BTN_ACTION_CLICK](btn);
                }
            }
            if(res != LV_RES_INV) {
                ext->long_pr_action_executed  = 0;
            }
        }
    } else if(sign == LV_SIGNAL_CLEANUP) {
#if USE_LV_ANIMATION && LV_BTN_INK_EFFECT
        if(btn == ink_obj) {
            lv_anim_del(ink_obj, (lv_anim_fp_t)lv_btn_ink_effect_anim);
            ink_obj = NULL;
        }
#endif
    } else if(sign == LV_SIGNAL_GET_TYPE) {
        lv_obj_type_t * buf = param;
        uint8_t i;
        for(i = 0; i < LV_MAX_ANCESTOR_NUM - 1; i++) {  /*Find the last set data*/
            if(buf->type[i] == NULL) break;
        }
        buf->type[i] = "lv_btn";
    }

    return res;
}

#if USE_LV_ANIMATION && LV_BTN_INK_EFFECT

/**
 * The animator function of inking. CAlled to increase the radius of ink
 * @param btn pointer to the animated button
 * @param val the new radius
 */
static void lv_btn_ink_effect_anim(lv_obj_t * btn, int32_t val)
{
    if(btn) {
        ink_act_value = val;
        lv_obj_invalidate(btn);
    }
}

/**
 * Called to clean up when the ink animation is ready
 * @param p unused
 */
static void lv_btn_ink_effect_anim_ready(void * p)
{
    (void) p;    /*Unused*/

    lv_btn_ext_t * ext = lv_obj_get_ext_attr(ink_obj);
    lv_btn_state_t state = lv_btn_get_state(ink_obj);

    lv_obj_invalidate(ink_obj);
    ink_ready = true;

    if((state == LV_BTN_STATE_REL || state == LV_BTN_STATE_TGL_REL) && ext->toggle == 0 && ink_playback == false) {
        lv_anim_t a;
        a.var = ink_obj;
        a.start = LV_BTN_INK_VALUE_MAX;
        a.end = 0;
        a.fp = (lv_anim_fp_t)lv_btn_ink_effect_anim;
        a.path = lv_anim_path_linear;
        a.end_cb = lv_btn_ink_effect_anim_ready;
        a.act_time = -ext->ink_wait_time;
        a.time = ext->ink_out_time;
        a.playback = 0;
        a.playback_pause = 0;
        a.repeat = 0;
        a.repeat_pause = 0;
        lv_anim_create(&a);

        ink_playback = true;
    } else {
        ink_obj = NULL;
    }
}
#endif /*USE_LV_ANIMATION*/

#endif