text: /**
   * @file lv_mbox.c
   *
   */
  
  
  /*********************
   *      INCLUDES
   *********************/
  #include "lv_mbox.h"
  #if USE_LV_MBOX != 0
  
  #include "../lv_core/lv_group.h"
  #include "../lv_themes/lv_theme.h"
  #include "../lv_misc/lv_anim.h"
  #include "../lv_misc/lv_math.h"
  
  /*********************
   *      DEFINES
   *********************/
  
  #if USE_LV_ANIMATION
  #  ifndef LV_MBOX_CLOSE_ANIM_TIME
  #    define LV_MBOX_CLOSE_ANIM_TIME  200 /*List close animation time)  */
  #  endif
  #else
  #  undef  LV_MBOX_CLOSE_ANIM_TIME
  #  define LV_MBOX_CLOSE_ANIM_TIME   0   /*No animations*/
  #endif
  
  /**********************
   *      TYPEDEFS
   **********************/
  
  /**********************
   *  STATIC PROTOTYPES
   **********************/
  static lv_res_t lv_mbox_signal(lv_obj_t * mbox, lv_signal_t sign, void * param);
  static void mbox_realign(lv_obj_t * mbox);
  static lv_res_t lv_mbox_close_action(lv_obj_t * btn, const char * txt);
  
  /**********************
   *  STATIC VARIABLES
   **********************/
  static lv_signal_func_t ancestor_signal;
  
  /**********************
   *      MACROS
   **********************/
  
  /**********************
   *   GLOBAL FUNCTIONS
   **********************/
  
  /**
   * Create a message box objects
   * @param par pointer to an object, it will be the parent of the new message box
   * @param copy pointer to a message box object, if not NULL then the new object will be copied from it
   * @return pointer to the created message box
   */
  lv_obj_t * lv_mbox_create(lv_obj_t * par, const lv_obj_t * copy)
  {
      LV_LOG_TRACE("mesasge box create started");
  
      /*Create the ancestor message box*/
      lv_obj_t * new_mbox = lv_cont_create(par, copy);
      lv_mem_assert(new_mbox);
      if(new_mbox == NULL) return NULL;
  
      if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_mbox);
  
      /*Allocate the message box type specific extended data*/
      lv_mbox_ext_t * ext = lv_obj_allocate_ext_attr(new_mbox, sizeof(lv_mbox_ext_t));
      lv_mem_assert(ext);
      if(ext == NULL) return NULL;
  
      ext->text = NULL;
      ext->btnm = NULL;
      ext->anim_time = LV_MBOX_CLOSE_ANIM_TIME;
  
      /*The signal and design functions are not copied so set them here*/
      lv_obj_set_signal_func(new_mbox, lv_mbox_signal);
  
      /*Init the new message box message box*/
      if(copy == NULL) {
          ext->text = lv_label_create(new_mbox, NULL);
          lv_label_set_align(ext->text, LV_LABEL_ALIGN_CENTER);
          lv_label_set_long_mode(ext->text, LV_LABEL_LONG_BREAK);
          lv_label_set_text(ext->text, "Message");
  
          lv_cont_set_layout(new_mbox, LV_LAYOUT_COL_M);
          lv_cont_set_fit(new_mbox, false, true);
          lv_obj_set_width(new_mbox, LV_HOR_RES / 2);
          lv_obj_align(new_mbox, NULL, LV_ALIGN_CENTER, 0, 0);
  
          /*Set the default styles*/
          lv_theme_t * th = lv_theme_get_current();
          if(th) {
              lv_mbox_set_style(new_mbox, LV_MBOX_STYLE_BG, th->mbox.bg);
          } else {
              lv_mbox_set_style(new_mbox, LV_MBOX_STYLE_BG, &lv_style_pretty);
          }
  
      }
      /*Copy an existing message box*/
      else {
          lv_mbox_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
  
          ext->text = lv_label_create(new_mbox, copy_ext->text);
  
          /*Copy the buttons and the label on them*/
          if(copy_ext->btnm) ext->btnm = lv_btnm_create(new_mbox, copy_ext->btnm);
  
          /*Refresh the style with new signal function*/
          lv_obj_refresh_style(new_mbox);
      }
  
  
      LV_LOG_INFO("mesasge box created");
  
      return new_mbox;
  }
  
  /*======================
   * Add/remove functions
   *=====================*/
  
  /**
   * Add button to the message box
   * @param mbox pointer to message box object
   * @param btn_map button descriptor (button matrix map).
   *                E.g.  a const char *txt[] = {"ok", "close", ""} (Can not be local variable)
   * @param action a function which will be called when a button is released
   */
  void lv_mbox_add_btns(lv_obj_t * mbox, const char ** btn_map, lv_btnm_action_t action)
  {
      lv_mbox_ext_t * ext = lv_obj_get_ext_attr(mbox);
  
      /*Create a button matrix if not exists yet*/
      if(ext->btnm == NULL) {
          ext->btnm = lv_btnm_create(mbox, NULL);
  
          /*Set the default styles*/
          lv_theme_t * th = lv_theme_get_current();
          if(th) {
              lv_mbox_set_style(mbox, LV_MBOX_STYLE_BTN_BG, th->mbox.btn.bg);
              lv_mbox_set_style(mbox, LV_MBOX_STYLE_BTN_REL, th->mbox.btn.rel);
              lv_mbox_set_style(mbox, LV_MBOX_STYLE_BTN_PR, th->mbox.btn.pr);
          } else {
              lv_btnm_set_style(ext->btnm, LV_BTNM_STYLE_BG, &lv_style_transp_fit);
          }
      }
  
      lv_btnm_set_map(ext->btnm, btn_map);
      if(action == NULL) lv_btnm_set_action(ext->btnm, lv_mbox_close_action); /*Set a default action anyway*/
      else  lv_btnm_set_action(ext->btnm, action);
  
      mbox_realign(mbox);
  }
  
  /*=====================
   * Setter functions
   *====================*/
  
  /**
   * Set the text of the message box
   * @param mbox pointer to a message box
   * @param txt a '\0' terminated character string which will be the message box text
   */
  void lv_mbox_set_text(lv_obj_t * mbox, const char * txt)
  {
      lv_mbox_ext_t * ext = lv_obj_get_ext_attr(mbox);
      lv_label_set_text(ext->text, txt);
  
      mbox_realign(mbox);
  }
  
  
  /**
   * Stop the action to call when button is released
   * @param pointer to an 'lv_btnm_action_t' action. In the action you need to use `lv_mbox_get_from_btn()` to get the `mbox`.
   * @param pointer to an 'lv_btnm_action_t' action
   */
  void lv_mbox_set_action(lv_obj_t * mbox, lv_btnm_action_t action)
  {
      lv_mbox_ext_t * ext = lv_obj_get_ext_attr(mbox);
      lv_btnm_set_action(ext->btnm, action);
  }
  
  
  /**
   * Set animation duration
   * @param mbox pointer to a message box object
   * @param anim_time animation length in  milliseconds (0: no animation)
   */
  void lv_mbox_set_anim_time(lv_obj_t * mbox, uint16_t anim_time)
  {
      lv_mbox_ext_t * ext = lv_obj_get_ext_attr(mbox);
  #if USE_LV_ANIMATION == 0
      anim_time = 0;
  #endif
  
      ext->anim_time = anim_time;
  }
  
  /**
   * Automatically delete the message box after a given time
   * @param mbox pointer to a message box object
   * @param delay a time (in milliseconds) to wait before delete the message box
   */
  void lv_mbox_start_auto_close(lv_obj_t * mbox, uint16_t delay)
  {
  #if USE_LV_ANIMATION
      lv_mbox_ext_t * ext = lv_obj_get_ext_attr(mbox);
  
      if(ext->anim_time != 0) {
          /*Add shrinking animations*/
          lv_obj_animate(mbox, LV_ANIM_GROW_H | LV_ANIM_OUT, ext->anim_time, delay, NULL);
          lv_obj_animate(mbox, LV_ANIM_GROW_V | LV_ANIM_OUT, ext->anim_time, delay, (void (*)(lv_obj_t *))lv_obj_del);
  
          /*Disable fit to let shrinking work*/
          lv_cont_set_fit(mbox, false, false);
      } else {
          lv_obj_animate(mbox, LV_ANIM_NONE, ext->anim_time, delay, (void (*)(lv_obj_t *))lv_obj_del);
      }
  #else
      (void)delay; /*Unused*/
      lv_obj_del(mbox);
  #endif
  }
  
  /**
   * Stop the auto. closing of message box
   * @param mbox pointer to a message box object
   */
  void lv_mbox_stop_auto_close(lv_obj_t * mbox)
  {
  #if USE_LV_ANIMATION
      lv_anim_del(mbox, NULL);
  #else
      (void)mbox; /*Unused*/
  #endif
  }
  
  /**
   * Set a style of a message box
   * @param mbox pointer to a message box object
   * @param type which style should be set
   * @param style pointer to a style
   */
  void lv_mbox_set_style(lv_obj_t * mbox, lv_mbox_style_t type, lv_style_t * style)
  {
      lv_mbox_ext_t * ext = lv_obj_get_ext_attr(mbox);
  
      switch(type) {
          case LV_MBOX_STYLE_BG:
              lv_obj_set_style(mbox, style);
              break;
          case LV_MBOX_STYLE_BTN_BG:
              lv_btnm_set_style(ext->btnm, LV_BTNM_STYLE_BG, style);
              break;
          case LV_MBOX_STYLE_BTN_REL:
              lv_btnm_set_style(ext->btnm, LV_BTNM_STYLE_BTN_REL, style);
              break;
          case LV_MBOX_STYLE_BTN_PR:
              lv_btnm_set_style(ext->btnm, LV_BTNM_STYLE_BTN_PR, style);
              break;
          case LV_MBOX_STYLE_BTN_TGL_REL:
              lv_btnm_set_style(ext->btnm, LV_BTNM_STYLE_BTN_TGL_REL, style);
              break;
          case LV_MBOX_STYLE_BTN_TGL_PR:
              lv_btnm_set_style(ext->btnm, LV_BTNM_STYLE_BTN_TGL_PR, style);
              break;
          case LV_MBOX_STYLE_BTN_INA:
              lv_btnm_set_style(ext->btnm, LV_BTNM_STYLE_BTN_INA, style);
              break;
      }
  
  }
  
  
  /*=====================
   * Getter functions
   *====================*/
  
  /**
   * Get the text of the message box
   * @param mbox pointer to a message box object
   * @return pointer to the text of the message box
   */
  const char * lv_mbox_get_text(const lv_obj_t * mbox)
  {
      lv_mbox_ext_t * ext = lv_obj_get_ext_attr(mbox);
  
      return lv_label_get_text(ext->text);
  }
  
  /**
   * Get the message box object from one of its button.
   * It is useful in the button release actions where only the button is known
   * @param btn pointer to a button of a message box
   * @return pointer to the button's message box
   */
  lv_obj_t * lv_mbox_get_from_btn(const lv_obj_t * btn)
  {
      lv_obj_t * mbox = lv_obj_get_parent(btn);
  
      return mbox;
  }
  
  /**
   * Get the animation duration (close animation time)
   * @param mbox pointer to a message box object
   * @return animation length in  milliseconds (0: no animation)
   */
  uint16_t lv_mbox_get_anim_time(const lv_obj_t * mbox)
  {
      lv_mbox_ext_t * ext = lv_obj_get_ext_attr(mbox);
      return ext->anim_time;
  }
  
  /**
   * Get a style of a message box
   * @param mbox pointer to a message box object
   * @param type which style should be get
   * @return style pointer to a style
   */
  lv_style_t * lv_mbox_get_style(const lv_obj_t * mbox, lv_mbox_style_t type)
  {
      lv_mbox_ext_t * ext = lv_obj_get_ext_attr(mbox);
  
      switch(type) {
          case LV_MBOX_STYLE_BG:
              return lv_obj_get_style(mbox);
          case LV_MBOX_STYLE_BTN_BG:
              return lv_btnm_get_style(ext->btnm, LV_BTNM_STYLE_BG);
          case LV_MBOX_STYLE_BTN_REL:
              return lv_btnm_get_style(ext->btnm, LV_BTNM_STYLE_BTN_REL);
          case LV_MBOX_STYLE_BTN_PR:
              return lv_btnm_get_style(ext->btnm, LV_BTNM_STYLE_BTN_PR);
          case LV_MBOX_STYLE_BTN_TGL_REL:
              return lv_btnm_get_style(ext->btnm, LV_BTNM_STYLE_BTN_TGL_REL);
          case LV_MBOX_STYLE_BTN_TGL_PR:
              return lv_btnm_get_style(ext->btnm, LV_BTNM_STYLE_BTN_TGL_PR);
          case LV_MBOX_STYLE_BTN_INA:
              return lv_btnm_get_style(ext->btnm, LV_BTNM_STYLE_BTN_INA);
          default:
              return NULL;
      }
  
      /*To avoid warning*/
      return NULL;
  }
  
  
  /**********************
   *   STATIC FUNCTIONS
   **********************/
  
  /**
   * Signal function of the message box
   * @param mbox pointer to a message box 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_mbox_signal(lv_obj_t * mbox, lv_signal_t sign, void * param)
  {
      lv_res_t res;
  
      /*Translate LV_GROUP_KEY_UP/DOWN to LV_GROUP_KEY_LEFT/RIGHT */
      char c_trans = 0;
      if(sign == LV_SIGNAL_CONTROLL) {
          c_trans = *((char *)param);
          if(c_trans == LV_GROUP_KEY_DOWN) c_trans = LV_GROUP_KEY_LEFT;
          if(c_trans == LV_GROUP_KEY_UP) c_trans = LV_GROUP_KEY_RIGHT;
  
          param = &c_trans;
      }
  
      /* Include the ancient signal function */
      res = ancestor_signal(mbox, sign, param);
      if(res != LV_RES_OK) return res;
  
      lv_mbox_ext_t * ext = lv_obj_get_ext_attr(mbox);
      if(sign == LV_SIGNAL_CORD_CHG) {
          if(lv_obj_get_width(mbox) != lv_area_get_width(param)) {
              mbox_realign(mbox);
          }
      } else if(sign == LV_SIGNAL_STYLE_CHG) {
          mbox_realign(mbox);
  
      } else if(sign == LV_SIGNAL_FOCUS || sign == LV_SIGNAL_DEFOCUS ||
                sign == LV_SIGNAL_CONTROLL || sign == LV_SIGNAL_GET_EDITABLE) {
          if(ext->btnm) {
              ext->btnm->signal_func(ext->btnm, sign, param);
          }
  
          /* The button matrix with ENCODER input supposes it's in a group but in this case it isn't (Only the message box's container)
           * So so some actions here instead*/
          if(sign == LV_SIGNAL_FOCUS) {
  #if USE_LV_GROUP
              lv_indev_t * indev = lv_indev_get_act();
              lv_hal_indev_type_t indev_type = lv_indev_get_type(indev);
              if(indev_type == LV_INDEV_TYPE_ENCODER) {
                  /*In navigation mode don't select any button but in edit mode select the fist*/
                  lv_btnm_ext_t * btnm_ext = lv_obj_get_ext_attr(ext->btnm);
                  if(lv_group_get_editing(lv_obj_get_group(mbox))) btnm_ext->btn_id_pr = 0;
                  else btnm_ext->btn_id_pr = LV_BTNM_PR_NONE;
              }
  #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_mbox";
      }
  
      return res;
  }
  
  /**
   * Resize the button holder to fit
   * @param mbox pointer to message box object
   */
  static void mbox_realign(lv_obj_t * mbox)
  {
      lv_mbox_ext_t * ext = lv_obj_get_ext_attr(mbox);
  
      lv_style_t * style = lv_mbox_get_style(mbox, LV_MBOX_STYLE_BG);
      lv_coord_t w = lv_obj_get_width(mbox) - 2 * style->body.padding.hor;
  
      if(ext->text) {
          lv_obj_set_width(ext->text, w);
      }
  
      if(ext->btnm) {
          lv_style_t * btn_bg_style = lv_mbox_get_style(mbox, LV_MBOX_STYLE_BTN_BG);
          lv_style_t * btn_rel_style = lv_mbox_get_style(mbox, LV_MBOX_STYLE_BTN_REL);
          lv_coord_t font_h = lv_font_get_height(btn_rel_style->text.font);
          lv_obj_set_size(ext->btnm, w, font_h + 2 * btn_rel_style->body.padding.ver + 2 * btn_bg_style->body.padding.ver);
      }
  }
  
  static lv_res_t lv_mbox_close_action(lv_obj_t * btn, const char * txt)
  {
      lv_obj_t * mbox = lv_mbox_get_from_btn(btn);
  
      if(txt[0] != '\0') {
          lv_mbox_start_auto_close(mbox, 0);
          return LV_RES_INV;
      }
  
      return LV_RES_OK;
  }
  
  #endif
  