[apps] Display Engineering notation in title bar

apps/shared.de.i18n

@@ -14,6 +14,7 @@ Deg = "gra"
 Deviation = "Varianz"
 DisplayValues = "Werte anzeigen"
 Empty = "Leer"
+Eng = "tech"
 ExitExamMode1 = "Möchten Sie den Testmodus "
 ExitExamMode2 = "verlassen?"
 Exponential = "Exponentielle"
@@ -51,7 +52,7 @@ PoolMemoryFull2 = "Versuchen Sie es erneut."
 Rad = "rad"
 Rename = "Umbenennen"
 RoundAbscissa = "Ganzzahl"
-Sci = "sci/"
+Sci = "sci"
 SquareSum = "Quadratsumme"
 StatTab = "Stats"
 StandardDeviation = "Standardabweichung"

apps/shared.en.i18n

@@ -14,6 +14,7 @@ Deg = "deg"
 Deviation = "Variance"
 DisplayValues = "Display values"
 Empty = "Empty"
+Eng = "eng"
 ExitExamMode1 = "Exit the exam "
 ExitExamMode2 = "mode?"
 Exponential = "Exponential"
@@ -51,7 +52,7 @@ PoolMemoryFull2 = "Try again."
 Rad = "rad"
 Rename = "Rename"
 RoundAbscissa = "Integer"
-Sci = "sci/"
+Sci = "sci"
 SquareSum = "Sum of squares"
 StandardDeviation = "Standard deviation"
 StoreExpressionNotAllowed = "'store' is not allowed"

apps/shared.es.i18n

@@ -14,6 +14,7 @@ Deg = "gra"
 Deviation = "Varianza"
 DisplayValues = "Visualizar los valores"
 Empty = "Vacio"
+Eng = "ing"
 ExitExamMode1 = "Salir del modo "
 ExitExamMode2 = "examen ?"
 Exponential = "Exponencial"
@@ -51,7 +52,7 @@ PoolMemoryFull2 = "Intente de nuevo."
 Rad = "rad"
 Rename = "Renombrar"
 RoundAbscissa = "Abscisas enteras"
-Sci = "sci/"
+Sci = "sci"
 SquareSum = "Suma cuadrados"
 StandardDeviation = "Desviación típica"
 StatTab = "Medidas"

apps/shared.fr.i18n

@@ -14,6 +14,7 @@ Deg = "deg"
 Deviation = "Variance"
 DisplayValues = "Afficher les valeurs"
 Empty = "Vide"
+Eng = "ing"
 ExitExamMode1 = "Voulez-vous sortir "
 ExitExamMode2 = "du mode examen ?"
 Exponential = "Exponentielle"
@@ -51,7 +52,7 @@ PoolMemoryFull2 = "Réessayez."
 Rad = "rad"
 Rename = "Renommer"
 RoundAbscissa = "Abscisses entières"
-Sci = "sci/"
+Sci = "sci"
 SquareSum = "Somme des carrés"
 StandardDeviation = "Écart type"
 StatTab = "Stats"

apps/shared.pt.i18n

@@ -14,6 +14,7 @@ Deg = "gra"
 Deviation = "Variancia"
 DisplayValues = "Exibir os valores"
 Empty = "Vácuo"
+Eng = "eng"
 ExitExamMode1 = "Você quer sair do modo de "
 ExitExamMode2 = "exame ?"
 Exponential = "Exponencial"
@@ -51,7 +52,7 @@ PoolMemoryFull2 = "Tente novamente."
 Rad = "rad"
 Rename = "Renomear"
 RoundAbscissa = "Inteiro"
-Sci = "sci/"
+Sci = "sci"
 SquareSum = "Soma dos quadrados"
 StandardDeviation = "Desvio padrão"
 StatTab = "Estat"

apps/title_bar_view.cpp

@@ -85,8 +85,19 @@ void TitleBarView::refreshPreferences() {
   char buffer[bufferSize];
   int numberOfChar = 0;
   Preferences * preferences = Preferences::sharedPreferences();
-  if (preferences->displayMode() == Preferences::PrintFloatMode::Scientific) {
-    numberOfChar += strlcpy(buffer, I18n::translate(I18n::Message::Sci), bufferSize);
+  {
+    // Display Sci/ or Eng/ if the print float mode is not decimal
+    const Preferences::PrintFloatMode printFloatMode = preferences->displayMode();
+    if (printFloatMode != Preferences::PrintFloatMode::Decimal) {
+      // Check that there is no new print float mode, otherwise add its message
+      assert(printFloatMode == Preferences::PrintFloatMode::Scientific
+          || printFloatMode == Preferences::PrintFloatMode::Engineering);
+      I18n::Message printMessage = printFloatMode == Preferences::PrintFloatMode::Scientific ? I18n::Message::Sci : I18n::Message::Eng;
+      numberOfChar += strlcpy(buffer, I18n::translate(printMessage), bufferSize);
+      assert(numberOfChar < bufferSize-1);
+      assert(UTF8Decoder::CharSizeOfCodePoint('/') == 1);
+      buffer[numberOfChar++] = '/';
+    }
   }
   assert(numberOfChar <= bufferSize);
   if (preferences->angleUnit() == Preferences::AngleUnit::Radian) {