diff -r 000000000000 -r 88d965579617 components/u8g2/csrc/u8g2_selection_list.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/components/u8g2/csrc/u8g2_selection_list.c	Tue Oct 08 12:00:31 2019 +0200
@@ -0,0 +1,284 @@
+/*
+
+  u8g2_selection_list.c
+  
+  selection list with scroll option
+  
+  Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/)
+
+  Copyright (c) 2016, olikraus@gmail.com
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without modification, 
+  are permitted provided that the following conditions are met:
+
+  * Redistributions of source code must retain the above copyright notice, this list 
+    of conditions and the following disclaimer.
+    
+  * Redistributions in binary form must reproduce the above copyright notice, this 
+    list of conditions and the following disclaimer in the documentation and/or other 
+    materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
+  CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
+  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
+  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
+  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
+  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
+  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
+  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
+  
+*/
+
+#include "u8g2.h"
+
+#define MY_BORDER_SIZE 1
+
+
+/*
+  Draw a string at x,y
+  Center string within w (left adjust if w < pixel len of s)
+  
+  Side effects:
+    u8g2_SetFontDirection(u8g2, 0);
+    u8g2_SetFontPosBaseline(u8g2);
+
+*/
+void u8g2_DrawUTF8Line(u8g2_t *u8g2, u8g2_uint_t x, u8g2_uint_t y, u8g2_uint_t w, const char *s, uint8_t border_size, uint8_t is_invert)
+{
+  u8g2_uint_t d, str_width;
+  u8g2_uint_t fx, fy, fw, fh;
+
+  /* only horizontal strings are supported, so force this here */
+  u8g2_SetFontDirection(u8g2, 0);
+
+  /* revert y position back to baseline ref */
+  y += u8g2->font_calc_vref(u8g2);   
+
+  /* calculate the width of the string in pixel */
+  str_width = u8g2_GetUTF8Width(u8g2, s);
+
+  /* calculate delta d within the box */
+  d = 0;
+  if ( str_width < w )
+  {
+    d = w;
+    d -=str_width;
+    d /= 2;
+  }
+  else
+  {
+    w = str_width;
+  }
+
+  /* caluclate text box */
+  fx = x;
+  fy = y - u8g2_GetAscent(u8g2) ;
+  fw = w;
+  fh = u8g2_GetAscent(u8g2) - u8g2_GetDescent(u8g2) ;
+
+  /* draw the box, if inverted */
+  u8g2_SetDrawColor(u8g2, 1);
+  if ( is_invert )
+  {
+    u8g2_DrawBox(u8g2, fx, fy, fw, fh);
+  }
+
+  /* draw the frame */
+  while( border_size > 0 )
+  {
+    fx--;
+    fy--;
+    fw +=2;
+    fh +=2;
+    u8g2_DrawFrame(u8g2, fx, fy, fw, fh );
+    border_size--;
+  }
+
+  if ( is_invert )
+  {
+    u8g2_SetDrawColor(u8g2, 0);
+  }
+  else
+  {
+    u8g2_SetDrawColor(u8g2, 1);
+  }
+
+  /* draw the text */
+  u8g2_DrawUTF8(u8g2, x+d, y, s);
+
+  /* revert draw color */
+  u8g2_SetDrawColor(u8g2, 1);
+
+}
+
+
+/*
+  draw several lines at position x,y.
+  lines are stored in s and must be separated with '\n'.
+  lines can be centered with respect to "w"
+  if s == NULL nothing is drawn and 0 is returned
+  returns the number of lines in s multiplied with line_height
+*/
+u8g2_uint_t u8g2_DrawUTF8Lines(u8g2_t *u8g2, u8g2_uint_t x, u8g2_uint_t y, u8g2_uint_t w, u8g2_uint_t line_height, const char *s)
+{
+  uint8_t i;
+  uint8_t cnt;
+  u8g2_uint_t yy = 0;
+  cnt = u8x8_GetStringLineCnt(s);
+  //printf("str=%s\n", s);
+  //printf("cnt=%d, y=%d, line_height=%d\n", cnt, y, line_height);
+  for( i = 0; i < cnt; i++ )
+  {
+    //printf("  i=%d, y=%d, line_height=%d\n", i, y, line_height);
+    u8g2_DrawUTF8Line(u8g2, x, y, w, u8x8_GetStringLineStart(i, s), 0, 0);
+    y+=line_height;
+    yy+=line_height;
+  }
+  return yy;
+}
+
+/*
+  selection list with string line
+  returns line height
+*/
+static u8g2_uint_t u8g2_draw_selection_list_line(u8g2_t *u8g2, u8sl_t *u8sl, u8g2_uint_t y, uint8_t idx, const char *s) U8G2_NOINLINE;
+static u8g2_uint_t u8g2_draw_selection_list_line(u8g2_t *u8g2, u8sl_t *u8sl, u8g2_uint_t y, uint8_t idx, const char *s)
+{
+  u8g2_uint_t yy;
+  uint8_t border_size = 0;
+  uint8_t is_invert = 0;
+	
+  u8g2_uint_t line_height = u8g2_GetAscent(u8g2) - u8g2_GetDescent(u8g2)+MY_BORDER_SIZE;
+
+  /* calculate offset from display upper border */
+  yy = idx;
+  yy -= u8sl->first_pos;
+  yy *= line_height;
+  yy += y;
+
+  /* check whether this is the current cursor line */
+  if ( idx == u8sl->current_pos )
+  {
+    border_size = MY_BORDER_SIZE;
+    is_invert = 1;
+  }
+
+  /* get the line from the array */
+  s = u8x8_GetStringLineStart(idx, s);
+
+  /* draw the line */
+  if ( s == NULL )
+    s = "";
+  u8g2_DrawUTF8Line(u8g2, MY_BORDER_SIZE, y, u8g2_GetDisplayWidth(u8g2)-2*MY_BORDER_SIZE, s, border_size, is_invert);
+  return line_height;
+}
+
+void u8g2_DrawSelectionList(u8g2_t *u8g2, u8sl_t *u8sl, u8g2_uint_t y, const char *s)
+{
+  uint8_t i;
+  for( i = 0; i < u8sl->visible; i++ )
+  {
+    y += u8g2_draw_selection_list_line(u8g2, u8sl, y, i+u8sl->first_pos, s);
+  }
+}
+
+
+/*
+  title: 		NULL for no title, valid str for title line. Can contain mutliple lines, separated by '\n'
+  start_pos: 	default position for the cursor, first line is 1.
+  sl:			string list (list of strings separated by \n)
+  returns 0 if user has pressed the home key
+  returns the selected line if user has pressed the select key
+  side effects:
+    u8g2_SetFontDirection(u8g2, 0);
+    u8g2_SetFontPosBaseline(u8g2);
+	
+*/
+uint8_t u8g2_UserInterfaceSelectionList(u8g2_t *u8g2, const char *title, uint8_t start_pos, const char *sl)
+{
+  u8sl_t u8sl;
+  u8g2_uint_t yy;
+
+  uint8_t event;
+
+  u8g2_uint_t line_height = u8g2_GetAscent(u8g2) - u8g2_GetDescent(u8g2)+MY_BORDER_SIZE;
+
+  uint8_t title_lines = u8x8_GetStringLineCnt(title);
+  uint8_t display_lines;
+
+  
+  if ( start_pos > 0 )	/* issue 112 */
+    start_pos--;		/* issue 112 */
+
+
+  if ( title_lines > 0 )
+  {
+	display_lines = (u8g2_GetDisplayHeight(u8g2)-3) / line_height;
+	u8sl.visible = display_lines;
+	u8sl.visible -= title_lines;
+  }
+  else
+  {
+	display_lines = u8g2_GetDisplayHeight(u8g2) / line_height;
+	u8sl.visible = display_lines;
+  }
+
+  u8sl.total = u8x8_GetStringLineCnt(sl);
+  u8sl.first_pos = 0;
+  u8sl.current_pos = start_pos;
+
+  if ( u8sl.current_pos >= u8sl.total )
+    u8sl.current_pos = u8sl.total-1;
+  if ( u8sl.first_pos+u8sl.visible <= u8sl.current_pos )
+    u8sl.first_pos = u8sl.current_pos-u8sl.visible+1;
+
+  u8g2_SetFontPosBaseline(u8g2);
+  
+  for(;;)
+  {
+      u8g2_FirstPage(u8g2);
+      do
+      {
+        yy = u8g2_GetAscent(u8g2);
+        if ( title_lines > 0 )
+        {
+          yy += u8g2_DrawUTF8Lines(u8g2, 0, yy, u8g2_GetDisplayWidth(u8g2), line_height, title);
+		
+	  u8g2_DrawHLine(u8g2, 0, yy-line_height- u8g2_GetDescent(u8g2) + 1, u8g2_GetDisplayWidth(u8g2));
+		
+	  yy += 3;
+        }
+        u8g2_DrawSelectionList(u8g2, &u8sl, yy, sl);
+      } while( u8g2_NextPage(u8g2) );
+      
+#ifdef U8G2_REF_MAN_PIC
+      return 0;
+#endif
+
+
+      for(;;)
+      {
+        event = u8x8_GetMenuEvent(u8g2_GetU8x8(u8g2));
+        if ( event == U8X8_MSG_GPIO_MENU_SELECT )
+          return u8sl.current_pos+1;		/* +1, issue 112 */
+        else if ( event == U8X8_MSG_GPIO_MENU_HOME )
+          return 0;				/* issue 112: return 0 instead of start_pos */
+        else if ( event == U8X8_MSG_GPIO_MENU_NEXT || event == U8X8_MSG_GPIO_MENU_DOWN )
+        {
+          u8sl_Next(&u8sl);
+          break;
+        }
+        else if ( event == U8X8_MSG_GPIO_MENU_PREV || event == U8X8_MSG_GPIO_MENU_UP )
+        {
+          u8sl_Prev(&u8sl);
+          break;
+        }
+      }
+  }
+}