关于textbox的疑问

rtgui_view_t* ui_view(rtgui_workbench_t* workbench, const char* view_name, const rt_bool_t bFlag)
{
    struct rtgui_view* view;
    view = rtgui_view_create(view_name);
    if (view == RT_NULL) return RT_NULL;
    /* 鍒涘缓鎴愬姛鍚庯紝娣诲姞鍒版暟缁勪腑 */
    ui_view_list[ui_view_number] = view;
    ui_view_number ++;
    /* 娣诲姞鍒扮埗workbench涓?*/
    rtgui_workbench_add_view(workbench, view);
    if (bFlag == RT_TRUE ) 
    /* 娣诲姞杈撳叆鎸夐挳 */
    {
        int    i,j;        
        char  *arrName ="1234567890*ABCDEFGHIJKLMNOPQRSTUVWXYZ";
        char  btnName; 
        struct rtgui_rect rect;
        struct rtgui_button *btnInput[37];
        /* 鑾峰緱瑙嗗浘鐨勪綅缃?俊鎭?鍦ㄥ姞鍏ュ埌workbench涓?椂锛寃orkbench浼氳嚜鍔ㄨ皟鏁磋?鍥剧殑澶у皬) */
        rtgui_widget_get_rect(RTGUI_WIDGET(view), &rect);
        for ( i = 0; i < 37; i++ )
        {
          switch (i)
          {
               case 0:
                rect.x1 = 5;
              rect.y2 = 205;
              rect.x2 = 22;
              rect.y1 = rect.y2 - 15;
              j=1;
             break;
             case 11:
              rect.x1 = 5;
              rect.y2 = 220;         //涓嬬Щ10涓?儚绱?
              rect.x2 = 22;
              rect.y1 = rect.y2 - 15;
              j=2;
                 break;
             case 24:
              rect.x1 = 5;
              rect.y2 = 235;        //涓嬬Щ20涓?儚绱?
              rect.x2 = 22;
              rect.y1 = rect.y2 - 15;
              j=3;
                 break;
             default:      
               switch (j)
               {
                    case 1:
                        if (arrName[i]=='*')
                        {
                           rect.x1 = rect.x2;                   
                           rect.x2 += 51;
                        }
                        else
                        {                        
                           rect.x1 = rect.x2;                   
                           rect.x2 += 17;
                        }                        
                        break;
                  case 2:
                          rect.x1 = rect.x2;                   
                        rect.x2 += 17;                      
                        break;
                  case 3:
                          rect.x1 = rect.x2;                   
                        rect.x2 += 17;                       
                          break;
                  default:
                          break;
               }
          }
          /* 鍒涘缓"涓婁竴涓?鎸夐挳 */
          if (arrName[i]=='*')
          {
            btnInput[i] = rtgui_button_create("删 除");            
          }
          else
          {
            btnName = arrName[i];
            btnInput[i] = rtgui_button_create(&btnName);
          }
          /* 璁剧疆onbutton鍔ㄤ綔鍒癲emo_view_prev鍑芥暟 */
          rtgui_button_set_onbutton(btnInput[i], keyboard_event_handler);
          /* 璁剧疆鎸夐挳鐨勪綅缃?俊鎭?*/
          rtgui_widget_set_rect(RTGUI_WIDGET(btnInput[i]), &rect);
          /* 娣诲姞鎸夐挳鍒拌?鍥句腑 */
          rtgui_container_add_child(RTGUI_CONTAINER(view), RTGUI_WIDGET(btnInput[i]));            
        }
    }
    /* 杩斿洖鍒涘缓鐨勮?鍥?*/
    return view;
}