build 190514. partial usage of utf8 in the ui, timetable panel appeaance improvements

utilities.cpp

@@ -1,4 +1,4 @@
-/*
+/*
 This Source Code Form is subject to the
 terms of the Mozilla Public License, v.
 2.0. If a copy of the MPL was not
@@ -246,6 +246,24 @@ std::string to_hex_str( int const Value, int const Width )
 	return converter.str();
 };
 
+char * const fractionlabels[] = { " ", u8"¹", u8"²", u8"³", u8"⁴", u8"⁵", u8"⁶", u8"⁷", u8"⁸", u8"⁹" };
+
+std::string to_minutes_str( float const Minutes, bool const Leadingzero, int const Width ) {
+
+    float minutesintegral;
+    auto const minutesfractional { std::modf( Minutes, &minutesintegral ) };
+    auto const width { Width - 1 };
+    auto minutes = (
+        std::string( width - 1, ' ' )
+        + ( Leadingzero ?
+            to_string( 100 + minutesintegral ).substr( 1, 2 ) :
+            to_string( minutesintegral, 0 ) ) );
+    return (
+        minutes.substr( minutes.size() - width, width )
+        + fractionlabels[ static_cast<int>( std::floor( minutesfractional * 10 + 0.1 ) ) ] );
+}
+
+
 int stol_def(const std::string &str, const int &DefaultValue) {
 
     int result { DefaultValue };