Progress!

Masked error caused by saving dbc while editor is open that causes
msg IDs to go crazy by making editor modal, but that affects all
other windows, so might be a better fix.

Added new value type of VALUE_STRING, probably better named
ENUMERATED_STRING, and it uses the table in the editor to define
the enum.

Fixed a bug in the signal viewer load when a signal is not matched
(I found it by renaming a signal and then loading)

dbc/dbc_classes.cpp

@@ -137,6 +137,17 @@ bool DBC_SIGNAL::processAsText(const CANFrame &frame, QString &outString, bool o
         cachedValue = outString;
         return true;
     }
+    else if(valType == VALUE_STRING)
+    {
+        result = Utility::processIntegerSignal(frame.payload(), startBit, signalSize, intelByteOrder, isSigned);
+
+        if(!getValueString(result, outString))
+        {
+            outString = "Signal string value is undefined";
+        }
+
+        return true;
+    }
 
     if (valType == SIGNED_INT) isSigned = true;
     if (valType == SIGNED_INT || valType == UNSIGNED_INT)
@@ -229,7 +240,7 @@ bool DBC_SIGNAL::processAsInt(const CANFrame &frame, int32_t &outValue)
     int32_t result = 0;
     bool isSigned = false;
 
-    if (valType == STRING || valType == SP_FLOAT  || valType == DP_FLOAT)
+    if (valType == STRING || valType == VALUE_STRING || valType == SP_FLOAT  || valType == DP_FLOAT)
     {
         return false;
     }
@@ -262,7 +273,7 @@ bool DBC_SIGNAL::processAsDouble(const CANFrame &frame, double &outValue)
     bool isSigned = false;
     double endResult;
 
-    if (valType == STRING)
+    if (valType == STRING || valType ==  VALUE_STRING)
     {
         return false;
     }