Type checking in Fact::setValue()

FactTextField, when setting the value from its "text" field, was converting the value to string. This was causing (QML JavaScript) code that uses the value for computation to stop working once the user changed the value.

src/FactSystem/Fact.cc

@@ -39,7 +39,27 @@ Fact::Fact(QString name, FactMetaData::ValueType_t type, QObject* parent) :
 
 void Fact::setValue(const QVariant& value)
 {
-    _value = value;
+    switch (type()) {
+        case FactMetaData::valueTypeInt8:
+        case FactMetaData::valueTypeInt16:
+        case FactMetaData::valueTypeInt32:
+            _value.setValue(QVariant(value.toInt()));
+            break;
+
+        case FactMetaData::valueTypeUint8:
+        case FactMetaData::valueTypeUint16:
+        case FactMetaData::valueTypeUint32:
+            _value.setValue(value.toUInt());
+            break;
+
+        case FactMetaData::valueTypeFloat:
+            _value.setValue(value.toFloat());
+            break;
+
+        case FactMetaData::valueTypeDouble:
+            _value.setValue(value.toDouble());
+            break;
+    }
     emit valueChanged(_value);
     emit _containerValueChanged(_value);
 }