#include "LVGL_Example.h"
// #include "LVGL_Music.h"
#include <demos/lv_demos.h>


/**********************
 *      TYPEDEFS
 **********************/
typedef enum {
    DISP_SMALL,
    DISP_MEDIUM,
    DISP_LARGE,
} disp_size_t;

/**********************
 *  STATIC PROTOTYPES
 **********************/
static void Onboard_create(lv_obj_t * parent);
static void Buzzer_create(lv_obj_t * parent);
static void Music_create(lv_obj_t * parent);
static void color_changer_create(lv_obj_t * parent);

static void color_changer_event_cb(lv_event_t * e);
static void color_event_cb(lv_event_t * e);
static void ta_event_cb(lv_event_t * e);
static void birthday_event_cb(lv_event_t * e);
static void calendar_event_cb(lv_event_t * e);
void example1_increase_lvgl_tick(lv_timer_t * t);
/**********************
 *  STATIC VARIABLES
 **********************/
static disp_size_t disp_size;

static lv_obj_t * tv;
static lv_obj_t * calendar;
lv_style_t style_text_muted;
lv_style_t style_title;
static lv_style_t style_icon;
static lv_style_t style_bullet;

static lv_obj_t * chart1;
static lv_obj_t * chart2;
static lv_obj_t * chart3;

static lv_chart_series_t * ser1;
static lv_chart_series_t * ser2;
static lv_chart_series_t * ser3;
static lv_chart_series_t * ser4;

static const lv_font_t * font_large;
static const lv_font_t * font_normal;

static lv_timer_t * auto_step_timer;
static lv_color_t original_screen_bg_color;

static lv_timer_t * meter2_timer;

lv_obj_t * SD_Size;
lv_obj_t * FlashSize;
lv_obj_t * BAT_Volts;
lv_obj_t * Board_angle;
lv_obj_t * RTC_Time;
lv_obj_t * Wireless_Scan;
lv_obj_t * Backlight_slider;


void Lvgl_Example1(void){

  if(LV_HOR_RES <= 320) disp_size = DISP_SMALL;             
  else if(LV_HOR_RES < 720) disp_size = DISP_MEDIUM;       
  else disp_size = DISP_LARGE;    
  font_large = LV_FONT_DEFAULT;                             
  font_normal = LV_FONT_DEFAULT;                         
  
  lv_coord_t tab_h;
  if(disp_size == DISP_LARGE) {
    tab_h = 70;
    #if LV_FONT_MONTSERRAT_24
      font_large     = &lv_font_montserrat_24;
    #else
      LV_LOG_WARN("LV_FONT_MONTSERRAT_24 is not enabled for the widgets demo. Using LV_FONT_DEFAULT instead.");
    #endif
    #if LV_FONT_MONTSERRAT_16
      font_normal    = &lv_font_montserrat_16;
    #else
      LV_LOG_WARN("LV_FONT_MONTSERRAT_16 is not enabled for the widgets demo. Using LV_FONT_DEFAULT instead.");
    #endif
  }
  else if(disp_size == DISP_MEDIUM) {
    tab_h = 45;
    #if LV_FONT_MONTSERRAT_20
      font_large     = &lv_font_montserrat_20;
    #else
        LV_LOG_WARN("LV_FONT_MONTSERRAT_20 is not enabled for the widgets demo. Using LV_FONT_DEFAULT instead.");
    #endif
    #if LV_FONT_MONTSERRAT_14
      font_normal    = &lv_font_montserrat_14;
    #else
      LV_LOG_WARN("LV_FONT_MONTSERRAT_14 is not enabled for the widgets demo. Using LV_FONT_DEFAULT instead.");
    #endif
  }
  else {   /* disp_size == DISP_SMALL */
    tab_h = 45;
    #if LV_FONT_MONTSERRAT_18
      font_large     = &lv_font_montserrat_18;
    #else
      LV_LOG_WARN("LV_FONT_MONTSERRAT_18 is not enabled for the widgets demo. Using LV_FONT_DEFAULT instead.");
    #endif
    #if LV_FONT_MONTSERRAT_12
      font_normal    = &lv_font_montserrat_12;
    #else
      LV_LOG_WARN("LV_FONT_MONTSERRAT_12 is not enabled for the widgets demo. Using LV_FONT_DEFAULT instead.");
    #endif
  }         // 设置字体
  
  lv_style_init(&style_text_muted);
  lv_style_set_text_opa(&style_text_muted, LV_OPA_90);

  lv_style_init(&style_title);
  lv_style_set_text_font(&style_title, font_large);

  lv_style_init(&style_icon);
  lv_style_set_text_color(&style_icon, lv_theme_get_color_primary(NULL));
  lv_style_set_text_font(&style_icon, font_large);

  lv_style_init(&style_bullet);
  lv_style_set_border_width(&style_bullet, 0);
  lv_style_set_radius(&style_bullet, LV_RADIUS_CIRCLE);

  tv = lv_tabview_create(lv_scr_act(), LV_DIR_TOP, tab_h);

  lv_obj_set_style_text_font(lv_scr_act(), font_normal, 0);

  if(disp_size == DISP_LARGE) {
    lv_obj_t * tab_btns = lv_tabview_get_tab_btns(tv);
    lv_obj_set_style_pad_left(tab_btns, LV_HOR_RES / 2, 0);
    lv_obj_t * logo = lv_img_create(tab_btns);
    LV_IMG_DECLARE(img_lvgl_logo);
    lv_img_set_src(logo, &img_lvgl_logo);
    lv_obj_align(logo, LV_ALIGN_LEFT_MID, -LV_HOR_RES / 2 + 25, 0);

    lv_obj_t * label = lv_label_create(tab_btns);
    lv_obj_add_style(label, &style_title, 0);
    lv_label_set_text(label, "LVGL v8");
    lv_obj_align_to(label, logo, LV_ALIGN_OUT_RIGHT_TOP, 10, 0);

    label = lv_label_create(tab_btns);
    lv_label_set_text(label, "Widgets demo");
    lv_obj_add_style(label, &style_text_muted, 0);
    lv_obj_align_to(label, logo, LV_ALIGN_OUT_RIGHT_BOTTOM, 10, 0);
  }

  lv_obj_t * t1 = lv_tabview_add_tab(tv, "Onboard");
  // lv_obj_t * t2 = lv_tabview_add_tab(tv, "Buzzer");
  // lv_obj_t * t3 = lv_tabview_add_tab(tv, "Shop");
  
  // lv_coord_t screen_width = lv_obj_get_width(lv_scr_act());
  // lv_obj_set_width(t1, screen_width);
  Onboard_create(t1);
  // Buzzer_create(t2);
  // shop_create(t3);

  // color_changer_create(tv);
}

static void led_event_cb(lv_event_t *e) {
    lv_obj_t *led = (lv_obj_t *)lv_event_get_user_data(e);
    lv_obj_t *sw = lv_event_get_target(e); 
 
    if (lv_obj_get_state(sw) & LV_STATE_CHECKED) {
      lv_led_on(led);
      Set_EXIO(EXIO_PIN8,High);
    } 
    else {
      lv_led_off(led);
      Set_EXIO(EXIO_PIN8,Low);
    }
}
static void Buzzer_create(lv_obj_t * parent)
{
  lv_obj_t *label = lv_label_create(parent);
  lv_label_set_text(label, "The buzzer tes");
  lv_obj_set_size(label, LV_PCT(30), LV_PCT(5));
  lv_obj_align(label, LV_ALIGN_CENTER, 0, -60);
  lv_obj_set_style_text_align(label, LV_TEXT_ALIGN_CENTER, 0);  


  lv_obj_t *led = lv_led_create(parent);
  lv_obj_set_size(led, 50, 50);
  lv_obj_align(led, LV_ALIGN_CENTER, -60, 0);
  lv_led_off(led);

  lv_obj_t *sw = lv_switch_create(parent);
  lv_obj_align(sw, LV_ALIGN_CENTER, 60, 0);
  lv_obj_add_event_cb(sw, led_event_cb, LV_EVENT_VALUE_CHANGED, led);
}
void Lvgl_Example1_close(void)
{
  /*Delete all animation*/
  lv_anim_del(NULL, NULL);

  lv_timer_del(meter2_timer);
  meter2_timer = NULL;

  lv_obj_clean(lv_scr_act());

  lv_style_reset(&style_text_muted);
  lv_style_reset(&style_title);
  lv_style_reset(&style_icon);
  lv_style_reset(&style_bullet);
}


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

static void Onboard_create(lv_obj_t * parent)
{

  /*Create a panel*/
  lv_obj_t * panel1 = lv_obj_create(parent);
  lv_obj_set_height(panel1, LV_SIZE_CONTENT);

  lv_obj_t * panel1_title = lv_label_create(panel1);
  lv_label_set_text(panel1_title, "Onboard parameter");
  lv_obj_add_style(panel1_title, &style_title, 0);

  lv_obj_t * SD_label = lv_label_create(panel1);
  lv_label_set_text(SD_label, "SD Card");
  lv_obj_add_style(SD_label, &style_text_muted, 0);

  SD_Size = lv_textarea_create(panel1);
  lv_textarea_set_one_line(SD_Size, true);
  lv_textarea_set_placeholder_text(SD_Size, "SD Size");
  lv_obj_add_event_cb(SD_Size, ta_event_cb, LV_EVENT_ALL, NULL);

  lv_obj_t * Flash_label = lv_label_create(panel1);
  lv_label_set_text(Flash_label, "Flash Size");
  lv_obj_add_style(Flash_label, &style_text_muted, 0);

  FlashSize = lv_textarea_create(panel1);
  lv_textarea_set_one_line(FlashSize, true);
  lv_textarea_set_placeholder_text(FlashSize, "Flash Size");
  lv_obj_add_event_cb(FlashSize, ta_event_cb, LV_EVENT_ALL, NULL);

  lv_obj_t * BAT_label = lv_label_create(panel1);
  lv_label_set_text(BAT_label, "Battery Voltage");
  lv_obj_add_style(BAT_label, &style_text_muted, 0);

  BAT_Volts = lv_textarea_create(panel1);
  lv_textarea_set_one_line(BAT_Volts, true);
  lv_textarea_set_placeholder_text(BAT_Volts, "BAT Volts");
  lv_obj_add_event_cb(BAT_Volts, ta_event_cb, LV_EVENT_ALL, NULL);

  lv_obj_t * angle_label = lv_label_create(panel1);
  lv_label_set_text(angle_label, "Angular deflection");
  lv_obj_add_style(angle_label, &style_text_muted, 0);

  Board_angle = lv_textarea_create(panel1);
  lv_textarea_set_one_line(Board_angle, true);
  lv_textarea_set_placeholder_text(Board_angle, "Board angle");
  lv_obj_add_event_cb(Board_angle, ta_event_cb, LV_EVENT_ALL, NULL);

  lv_obj_t * Time_label = lv_label_create(panel1);
  lv_label_set_text(Time_label, "RTC Time");
  lv_obj_add_style(Time_label, &style_text_muted, 0);

  RTC_Time = lv_textarea_create(panel1);
  lv_textarea_set_one_line(RTC_Time, true);
  lv_textarea_set_placeholder_text(RTC_Time, "Display time");
  lv_obj_add_event_cb(RTC_Time, ta_event_cb, LV_EVENT_ALL, NULL);

  lv_obj_t * Wireless_label = lv_label_create(panel1);
  lv_label_set_text(Wireless_label, "Wireless scan");
  lv_obj_add_style(Wireless_label, &style_text_muted, 0);

  Wireless_Scan = lv_textarea_create(panel1);
  lv_textarea_set_one_line(Wireless_Scan, true);
  lv_textarea_set_placeholder_text(Wireless_Scan, "Wireless number");
  lv_obj_add_event_cb(Wireless_Scan, ta_event_cb, LV_EVENT_ALL, NULL);

  lv_obj_t * Backlight_label = lv_label_create(panel1);
  lv_label_set_text(Backlight_label, "Backlight brightness");
  lv_obj_add_style(Backlight_label, &style_text_muted, 0);

  Backlight_slider = lv_slider_create(panel1);                                 
  lv_obj_add_flag(Backlight_slider, LV_OBJ_FLAG_CLICKABLE);    
  lv_obj_set_size(Backlight_slider, 200, 35);              
  lv_obj_set_style_radius(Backlight_slider, 3, LV_PART_KNOB);               // Adjust the value for more or less rounding                                            
  lv_obj_set_style_bg_opa(Backlight_slider, LV_OPA_TRANSP, LV_PART_KNOB);                               
  // lv_obj_set_style_pad_all(Backlight_slider, 0, LV_PART_KNOB);                                            
  lv_obj_set_style_bg_color(Backlight_slider, lv_color_hex(0xAAAAAA), LV_PART_KNOB);               
  lv_obj_set_style_bg_color(Backlight_slider, lv_color_hex(0xFFFFFF), LV_PART_INDICATOR);             
  lv_obj_set_style_outline_width(Backlight_slider, 2, LV_PART_INDICATOR);  
  lv_obj_set_style_outline_color(Backlight_slider, lv_color_hex(0xD3D3D3), LV_PART_INDICATOR);      
  lv_slider_set_range(Backlight_slider, 5, Backlight_MAX);              
  lv_slider_set_value(Backlight_slider, LCD_Backlight, LV_ANIM_ON);  
  lv_obj_add_event_cb(Backlight_slider, Backlight_adjustment_event_cb, LV_EVENT_VALUE_CHANGED, NULL);

  lv_obj_t * panel2 = lv_obj_create(parent);
  lv_obj_set_height(panel2, LV_SIZE_CONTENT);

  lv_obj_t * panel2_title = lv_label_create(panel2);
  lv_label_set_text(panel2_title, "The buzzer tes");
  lv_obj_add_style(panel2_title, &style_title, 0);

  lv_obj_t *led = lv_led_create(panel2);
  lv_obj_set_size(led, 50, 50);
  lv_obj_align(led, LV_ALIGN_CENTER, -60, 0);
  lv_led_off(led);

  lv_obj_t *sw = lv_switch_create(panel2);
  lv_obj_set_size(sw, 65, 40);
  lv_obj_align(sw, LV_ALIGN_CENTER, 60, 0);
  lv_obj_add_event_cb(sw, led_event_cb, LV_EVENT_VALUE_CHANGED, led);

/////////////////////////////////////////////////////////
  static lv_coord_t grid_main_col_dsc[] = {LV_GRID_FR(1), LV_GRID_TEMPLATE_LAST};
  static lv_coord_t grid_main_row_dsc[] = {LV_GRID_CONTENT, LV_GRID_CONTENT, LV_GRID_TEMPLATE_LAST};


  /*Create the top panel*/
  static lv_coord_t grid_1_col_dsc[] = {LV_GRID_FR(4),  LV_GRID_FR(1),  LV_GRID_FR(1),  LV_GRID_FR(1), LV_GRID_FR(4), LV_GRID_TEMPLATE_LAST};
  static lv_coord_t grid_1_row_dsc[] = {
    LV_GRID_CONTENT, /*Name*/
    LV_GRID_CONTENT, /*Description*/
    LV_GRID_CONTENT, /*Email*/
    LV_GRID_CONTENT, /*Email*/
    LV_GRID_TEMPLATE_LAST
  };

  static lv_coord_t grid_2_col_dsc[] = {LV_GRID_FR(1), LV_GRID_FR(5), LV_GRID_FR(1), LV_GRID_TEMPLATE_LAST};
  static lv_coord_t grid_2_row_dsc[] = {
    LV_GRID_CONTENT,  /*Title*/
    5,                /*Separator*/
    LV_GRID_CONTENT,  /*Box title*/
    40,               /*Box*/
    LV_GRID_CONTENT,  /*Box title*/
    40,               /*Box*/
    LV_GRID_CONTENT,  /*Box title*/
    40,               /*Box*/
    LV_GRID_CONTENT,  /*Box title*/
    40,               /*Box*/
    LV_GRID_CONTENT,  /*Box title*/
    40,               /*Box*/
    LV_GRID_CONTENT,  /*Box title*/
    40,               /*Box*/
    LV_GRID_CONTENT,  /*Box title*/
    40,               /*Box*/
    LV_GRID_TEMPLATE_LAST
  };


  lv_obj_set_grid_dsc_array(parent, grid_main_col_dsc, grid_main_row_dsc);

  lv_obj_set_grid_cell(panel1, LV_GRID_ALIGN_STRETCH, 0, 1, LV_GRID_ALIGN_START, 0, 1);
  lv_obj_set_grid_dsc_array(panel1, grid_2_col_dsc, grid_2_row_dsc);
  lv_obj_set_grid_cell(panel1_title, LV_GRID_ALIGN_CENTER, 1, 1, LV_GRID_ALIGN_CENTER, 0, 1);
  lv_obj_set_grid_cell(SD_label, LV_GRID_ALIGN_START, 1, 1, LV_GRID_ALIGN_START, 2, 1);
  lv_obj_set_grid_cell(SD_Size, LV_GRID_ALIGN_STRETCH, 1, 1, LV_GRID_ALIGN_CENTER, 3, 1);
  lv_obj_set_grid_cell(Flash_label, LV_GRID_ALIGN_START, 1, 1, LV_GRID_ALIGN_START, 4, 1);
  lv_obj_set_grid_cell(FlashSize, LV_GRID_ALIGN_STRETCH, 1, 1, LV_GRID_ALIGN_CENTER, 5, 1);
  lv_obj_set_grid_cell(BAT_label, LV_GRID_ALIGN_START, 1, 1, LV_GRID_ALIGN_START, 6, 1);
  lv_obj_set_grid_cell(BAT_Volts, LV_GRID_ALIGN_STRETCH, 1, 1, LV_GRID_ALIGN_CENTER, 7, 1);
  lv_obj_set_grid_cell(angle_label, LV_GRID_ALIGN_START, 1, 1, LV_GRID_ALIGN_START, 8, 1);
  lv_obj_set_grid_cell(Board_angle, LV_GRID_ALIGN_STRETCH, 1, 1, LV_GRID_ALIGN_CENTER, 9, 1);
  lv_obj_set_grid_cell(Time_label, LV_GRID_ALIGN_START, 1, 1, LV_GRID_ALIGN_START, 10, 1);
  lv_obj_set_grid_cell(RTC_Time, LV_GRID_ALIGN_STRETCH, 1, 1, LV_GRID_ALIGN_CENTER, 11, 1);
  lv_obj_set_grid_cell(Wireless_label, LV_GRID_ALIGN_START, 1, 1, LV_GRID_ALIGN_START, 12, 1);
  lv_obj_set_grid_cell(Wireless_Scan, LV_GRID_ALIGN_STRETCH, 1, 1, LV_GRID_ALIGN_CENTER, 13, 1);
  lv_obj_set_grid_cell(Backlight_label, LV_GRID_ALIGN_START, 1, 1, LV_GRID_ALIGN_START, 14, 1);
  lv_obj_set_grid_cell(Backlight_slider, LV_GRID_ALIGN_STRETCH, 1, 1, LV_GRID_ALIGN_CENTER, 15, 1);

  lv_obj_set_grid_cell(panel2, LV_GRID_ALIGN_STRETCH, 0, 1, LV_GRID_ALIGN_STRETCH, 1, 1);
  lv_obj_set_grid_dsc_array(panel2, grid_1_col_dsc, grid_1_row_dsc);
  lv_obj_set_grid_cell(panel2_title, LV_GRID_ALIGN_CENTER, 2, 1, LV_GRID_ALIGN_CENTER, 0, 1);
  lv_obj_set_grid_cell(led, LV_GRID_ALIGN_CENTER, 1, 1, LV_GRID_ALIGN_CENTER, 2, 1);
  lv_obj_set_grid_cell(sw, LV_GRID_ALIGN_CENTER, 3, 1, LV_GRID_ALIGN_CENTER, 2, 1);

  
  auto_step_timer = lv_timer_create(example1_increase_lvgl_tick, 100, NULL);
}

void example1_increase_lvgl_tick(lv_timer_t * t)
{
  char buf[100]; 
  
  snprintf(buf, sizeof(buf), "%d MB\r\n", SDCard_Size);
  lv_textarea_set_placeholder_text(SD_Size, buf);
  snprintf(buf, sizeof(buf), "%d MB\r\n", Flash_Size);
  lv_textarea_set_placeholder_text(FlashSize, buf);
  snprintf(buf, sizeof(buf), "%.2f V\r\n", BAT_analogVolts);
  lv_textarea_set_placeholder_text(BAT_Volts, buf);
  snprintf(buf, sizeof(buf), "X:%.2f  Y:%.2f  Z:%.2f\r\n", Accel.x, Accel.y, Accel.z);
  lv_textarea_set_placeholder_text(Board_angle, buf);
  snprintf(buf, sizeof(buf), "%d.%d.%d   %d:%d:%d\r\n",datetime.year,datetime.month,datetime.day,datetime.hour,datetime.minute,datetime.second);
  lv_textarea_set_placeholder_text(RTC_Time, buf);
  if(Scan_finish)
    snprintf(buf, sizeof(buf), "WIFI: %d    BLE: %d    ..Scan Finish.\r\n",WIFI_NUM,BLE_NUM);
  else
    snprintf(buf, sizeof(buf), "WIFI: %d    BLE: %d\r\n",WIFI_NUM,BLE_NUM);
  lv_textarea_set_placeholder_text(Wireless_Scan, buf);  
  lv_slider_set_value(Backlight_slider, LCD_Backlight, LV_ANIM_ON); 
  LVGL_Backlight_adjustment(LCD_Backlight);
}
// static void Music_create(lv_obj_t * parent)
// {
//   static lv_obj_t * ctrl;
//   original_screen_bg_color = lv_obj_get_style_bg_color(parent, 0);
//   lv_obj_set_style_bg_color(parent, lv_color_hex(0x343247), 0);

//   ctrl = _lv_demo_music_main_create(parent);
// }
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
static void color_changer_create(lv_obj_t * parent)
{
    static lv_palette_t palette[] = {
        LV_PALETTE_BLUE, LV_PALETTE_GREEN, LV_PALETTE_BLUE_GREY,  LV_PALETTE_ORANGE,
        LV_PALETTE_RED, LV_PALETTE_PURPLE, LV_PALETTE_TEAL, _LV_PALETTE_LAST
    };

    lv_obj_t * color_cont = lv_obj_create(parent);
    lv_obj_remove_style_all(color_cont);
    lv_obj_set_flex_flow(color_cont, LV_FLEX_FLOW_ROW);
    lv_obj_set_flex_align(color_cont, LV_FLEX_ALIGN_SPACE_EVENLY, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
    lv_obj_add_flag(color_cont, LV_OBJ_FLAG_FLOATING);

    lv_obj_set_style_bg_color(color_cont, lv_color_white(), 0);
    lv_obj_set_style_pad_right(color_cont, disp_size == DISP_SMALL ? LV_DPX(47) : LV_DPX(55), 0);
    lv_obj_set_style_bg_opa(color_cont, LV_OPA_COVER, 0);
    lv_obj_set_style_radius(color_cont, LV_RADIUS_CIRCLE, 0);

    if(disp_size == DISP_SMALL) lv_obj_set_size(color_cont, LV_DPX(52), LV_DPX(52));
    else lv_obj_set_size(color_cont, LV_DPX(60), LV_DPX(60));

    lv_obj_align(color_cont, LV_ALIGN_BOTTOM_RIGHT, - LV_DPX(10),  - LV_DPX(10));

    uint32_t i;
    for(i = 0; palette[i] != _LV_PALETTE_LAST; i++) {
        lv_obj_t * c = lv_btn_create(color_cont);
        lv_obj_set_style_bg_color(c, lv_palette_main(palette[i]), 0);
        lv_obj_set_style_radius(c, LV_RADIUS_CIRCLE, 0);
        lv_obj_set_style_opa(c, LV_OPA_TRANSP, 0);
        lv_obj_set_size(c, 20, 20);
        lv_obj_add_event_cb(c, color_event_cb, LV_EVENT_ALL, &palette[i]);
        lv_obj_clear_flag(c, LV_OBJ_FLAG_SCROLL_ON_FOCUS);
    }

    lv_obj_t * btn = lv_btn_create(parent);
    lv_obj_add_flag(btn, LV_OBJ_FLAG_FLOATING | LV_OBJ_FLAG_CLICKABLE);
    lv_obj_set_style_bg_color(btn, lv_color_white(), LV_STATE_CHECKED);
    lv_obj_set_style_pad_all(btn, 10, 0);
    lv_obj_set_style_radius(btn, LV_RADIUS_CIRCLE, 0);
    lv_obj_add_event_cb(btn, color_changer_event_cb, LV_EVENT_ALL, color_cont);
    lv_obj_set_style_shadow_width(btn, 0, 0);
    lv_obj_set_style_bg_img_src(btn, LV_SYMBOL_TINT, 0);

    if(disp_size == DISP_SMALL) {
        lv_obj_set_size(btn, LV_DPX(42), LV_DPX(42));
        lv_obj_align(btn, LV_ALIGN_BOTTOM_RIGHT, -LV_DPX(15), -LV_DPX(15));
    }
    else {
        lv_obj_set_size(btn, LV_DPX(50), LV_DPX(50));
        lv_obj_align(btn, LV_ALIGN_BOTTOM_RIGHT, -LV_DPX(15), -LV_DPX(15));
    }
}

static void color_changer_anim_cb(void * var, int32_t v)
{
    lv_obj_t * obj =(lv_obj_t *) var;
    lv_coord_t max_w = lv_obj_get_width(lv_obj_get_parent(obj)) - LV_DPX(20);
    lv_coord_t w;

    if(disp_size == DISP_SMALL) {
        w = lv_map(v, 0, 256, LV_DPX(52), max_w);
        lv_obj_set_width(obj, w);
        lv_obj_align(obj, LV_ALIGN_BOTTOM_RIGHT, - LV_DPX(10),  - LV_DPX(10));
    }
    else {
        w = lv_map(v, 0, 256, LV_DPX(60), max_w);
        lv_obj_set_width(obj, w);
        lv_obj_align(obj, LV_ALIGN_BOTTOM_RIGHT, - LV_DPX(10),  - LV_DPX(10));
    }

    if(v > LV_OPA_COVER) v = LV_OPA_COVER;

    uint32_t i;
    for(i = 0; i < lv_obj_get_child_cnt(obj); i++) {
        lv_obj_set_style_opa(lv_obj_get_child(obj, i), v, 0);
    }

}

static void color_changer_event_cb(lv_event_t * e)
{
    if(lv_event_get_code(e) == LV_EVENT_CLICKED) {
        lv_obj_t * color_cont = (lv_obj_t *)lv_event_get_user_data(e);
        if(lv_obj_get_width(color_cont) < LV_HOR_RES / 2) {
            lv_anim_t a;
            lv_anim_init(&a);
            lv_anim_set_var(&a, color_cont);
            lv_anim_set_exec_cb(&a, color_changer_anim_cb);
            lv_anim_set_values(&a, 0, 256);
            lv_anim_set_time(&a, 200);
            lv_anim_start(&a);
        }
        else {
            lv_anim_t a;
            lv_anim_init(&a);
            lv_anim_set_var(&a, color_cont);
            lv_anim_set_exec_cb(&a, color_changer_anim_cb);
            lv_anim_set_values(&a, 256, 0);
            lv_anim_set_time(&a, 200);
            lv_anim_start(&a);
        }
    }
}
static void color_event_cb(lv_event_t * e)
{
    lv_event_code_t code = lv_event_get_code(e);
    lv_obj_t * obj = lv_event_get_target(e);

    if(code == LV_EVENT_FOCUSED) {
        lv_obj_t * color_cont = lv_obj_get_parent(obj);
        if(lv_obj_get_width(color_cont) < LV_HOR_RES / 2) {
            lv_anim_t a;
            lv_anim_init(&a);
            lv_anim_set_var(&a, color_cont);
            lv_anim_set_exec_cb(&a, color_changer_anim_cb);
            lv_anim_set_values(&a, 0, 256);
            lv_anim_set_time(&a, 200);
            lv_anim_start(&a);
        }
    }
    else if(code == LV_EVENT_CLICKED) {
        lv_palette_t * palette_primary = (lv_palette_t *)lv_event_get_user_data(e);
        lv_palette_t palette_secondary =(lv_palette_t) ((*palette_primary) + 3); /*Use another palette as secondary*/
        if(palette_secondary >= _LV_PALETTE_LAST) palette_secondary =(lv_palette_t)(0);
#if LV_USE_THEME_DEFAULT
        lv_theme_default_init(NULL, lv_palette_main(*palette_primary), lv_palette_main(palette_secondary),
                              LV_THEME_DEFAULT_DARK, font_normal);
#endif
        lv_color_t color = lv_palette_main(*palette_primary);
        lv_style_set_text_color(&style_icon, color);
        lv_chart_set_series_color(chart1, ser1, color);
        lv_chart_set_series_color(chart2, ser3, color);
    }
}



static void ta_event_cb(lv_event_t * e)
{
}

static void birthday_event_cb(lv_event_t * e)
{
    lv_event_code_t code = lv_event_get_code(e);
    lv_obj_t * ta = lv_event_get_target(e);

    if(code == LV_EVENT_FOCUSED) {
        if(lv_indev_get_type(lv_indev_get_act()) == LV_INDEV_TYPE_POINTER) {
            if(calendar == NULL) {
                lv_obj_add_flag(lv_layer_top(), LV_OBJ_FLAG_CLICKABLE);
                calendar = lv_calendar_create(lv_layer_top());
                lv_obj_set_style_bg_opa(lv_layer_top(), LV_OPA_50, 0);
                lv_obj_set_style_bg_color(lv_layer_top(), lv_palette_main(LV_PALETTE_GREY), 0);
                if(disp_size == DISP_SMALL) lv_obj_set_size(calendar, 180, 200);
                else if(disp_size == DISP_MEDIUM) lv_obj_set_size(calendar, 200, 220);
                else  lv_obj_set_size(calendar, 300, 330);
                lv_calendar_set_showed_date(calendar, 1990, 01);
                lv_obj_align(calendar, LV_ALIGN_CENTER, 0, 30);
                lv_obj_add_event_cb(calendar, calendar_event_cb, LV_EVENT_ALL, ta);

                lv_calendar_header_dropdown_create(calendar);
            }
        }
    }
}


static void calendar_event_cb(lv_event_t * e)
{
    lv_event_code_t code = lv_event_get_code(e);
    lv_obj_t * ta = (lv_obj_t *)lv_event_get_user_data(e);
    lv_obj_t * obj = (lv_obj_t *)lv_event_get_current_target(e);
    if(code == LV_EVENT_VALUE_CHANGED) {
        lv_calendar_date_t d;
        lv_calendar_get_pressed_date(obj, &d);
        char buf[32];
        lv_snprintf(buf, sizeof(buf), "%02d.%02d.%d", d.day, d.month, d.year);
        lv_textarea_set_text(ta, buf);

        lv_obj_del(calendar);
        calendar = NULL;
        lv_obj_clear_flag(lv_layer_top(), LV_OBJ_FLAG_CLICKABLE);
        lv_obj_set_style_bg_opa(lv_layer_top(), LV_OPA_TRANSP, 0);
    }
}

void Backlight_adjustment_event_cb(lv_event_t * e) {
  uint8_t Backlight = lv_slider_get_value(lv_event_get_target(e));  
  if (Backlight >= 0 && Backlight <= Backlight_MAX)  {
    lv_slider_set_value(Backlight_slider, Backlight, LV_ANIM_ON); 
    LCD_Backlight = Backlight;
    LVGL_Backlight_adjustment(Backlight);
  }
  else
    printf("Backlight out of range: %d\n", Backlight);

}

void LVGL_Backlight_adjustment(uint8_t Backlight) {
  Set_Backlight(Backlight);                                 
}