Show error message in Lua widgets instead of "disabled"

Also a new function drawTextLines(...) in draw_functions that splits a string over multiple lines

radio/src/gui/colorlcd/draw_functions.cpp

@@ -503,3 +503,28 @@ void drawHexNumber(BitmapBuffer * dc, coord_t x, coord_t y, uint32_t val, LcdFla
     x = dc->drawSizedText(x, y, &c, 1, flags);
   }
 }
+
+void drawTextLines(BitmapBuffer * dc, coord_t left, coord_t top, coord_t width, coord_t height, char * str, LcdFlags flags)
+{
+  coord_t x = left;
+  coord_t y = top;
+  coord_t line = getFontHeight(flags & 0xFFFF);
+  coord_t space = getTextWidth(" ", 1, flags);
+  coord_t word;
+  char * eos = str + strlen(str);
+  char * nxt;
+  
+  while (str < eos) {
+    nxt = strstr(str, " ");
+    if (!nxt) nxt = eos;
+    word = getTextWidth(str, nxt - str, flags);
+    if (x + word > left + width && x > left) {
+      x = left;
+      y += line;
+    }
+    if (y + line > top + height) break;
+    dc->drawSizedText(x, y, str, nxt - str, flags);
+    str = nxt + 1;
+    x += word + space;
+  }
+}

radio/src/gui/colorlcd/draw_functions.h

@@ -72,6 +72,7 @@ void drawGPSPosition(BitmapBuffer * dc, coord_t x, coord_t y, int32_t longitude,
 void drawDate(BitmapBuffer * dc, coord_t x, coord_t y, TelemetryItem & telemetryItem, LcdFlags flags = 0);
 void drawValueWithUnit(BitmapBuffer * dc, coord_t x, coord_t y, int val, uint8_t unit, LcdFlags flags = 0);
 void drawHexNumber(BitmapBuffer * dc, coord_t x, coord_t y, uint32_t val, LcdFlags flags = 0);
+void drawTextLines(BitmapBuffer * dc, coord_t left, coord_t top, coord_t width, coord_t height, char * str, LcdFlags flags);
 inline void drawChn(BitmapBuffer * dc, coord_t x, coord_t y, uint8_t idx, LcdFlags flags)
 {
   drawSource(dc, x, y, MIXSRC_CH1 + idx - 1, flags);