add method toFormat to get number format from character

src/Base/Quantity.h

@@ -63,6 +63,22 @@ struct QuantityFormat {
             return 'g';
         }
     }
+    static inline NumberFormat toFormat(char c, bool* ok = 0) {
+        if (ok)
+            *ok = true;
+        switch (c) {
+        case 'f':
+            return Fixed;
+        case 'e':
+            return Scientific;
+        case 'g':
+            return Default;
+        default:
+            if (ok)
+                *ok = false;
+            return Default;
+        }
+    }
 };
 
 /**

src/Base/QuantityPyImp.cpp

@@ -631,19 +631,11 @@ void  QuantityPy::setFormat(Py::Tuple arg)
 #endif
     if (fmtstr.size() != 1)
         throw Py::ValueError("Invalid format character");
-    switch (fmtstr.front()) {
-    case 'f':
-        fmt.format = QuantityFormat::Fixed;
-        break;
-    case 'e':
-        fmt.format = QuantityFormat::Scientific;
-        break;
-    case 'g':
-        fmt.format = QuantityFormat::Default;
-        break;
-    default:
+
+    bool ok;
+    fmt.format = Base::QuantityFormat::toFormat(fmtstr.front(), &ok);
+    if (!ok)
         throw Py::ValueError("Invalid format character");
-    }
 
     getQuantityPtr()->setFormat(fmt);
 }

src/Gui/InputField.cpp

@@ -535,13 +535,11 @@ QString InputField::getFormat() const
 
 void InputField::setFormat(const QString& format)
 {
+    if (format.isEmpty())
+        return;
+    QChar c = format[0];
     Base::QuantityFormat f = this->actQuantity.getFormat();
-    if (format == QString::fromLatin1("f"))
-        f.format = Base::QuantityFormat::NumberFormat::Fixed;
-    else if (format == QString::fromLatin1("e"))
-        f.format = Base::QuantityFormat::NumberFormat::Scientific;
-    else
-        f.format = Base::QuantityFormat::NumberFormat::Default;
+    f.format = Base::QuantityFormat::toFormat(c.toLatin1());
     actQuantity.setFormat(f);
     updateText(actQuantity);
 }