1.1 --- a/Hardware/Sensor.cs	Thu Aug 12 20:53:27 2010 +0000
     1.2 +++ b/Hardware/Sensor.cs	Sun Aug 15 14:46:58 2010 +0000
     1.3 @@ -51,9 +51,9 @@
     1.4      private SensorType sensorType;
     1.5      private IHardware hardware;
     1.6      private ReadOnlyArray<IParameter> parameters;
     1.7 -    private float? value;
     1.8 -    private float? min;
     1.9 -    private float? max;
    1.10 +    private float? currentValue;
    1.11 +    private float? minValue;
    1.12 +    private float? maxValue;
    1.13      private Queue<SensorValue> values =
    1.14        new Queue<SensorValue>(MAX_MINUTES * 15);
    1.15      private ISettings settings;
    1.16 @@ -114,7 +114,7 @@
    1.17          return name; 
    1.18        }
    1.19        set {
    1.20 -        if (value != "") 
    1.21 +        if (!string.IsNullOrEmpty(value)) 
    1.22            name = value;          
    1.23          else 
    1.24            name = defaultName;
    1.25 @@ -136,7 +136,7 @@
    1.26  
    1.27      public float? Value {
    1.28        get { 
    1.29 -        return value; 
    1.30 +        return currentValue; 
    1.31        }
    1.32        set {
    1.33          while (values.Count > 0 && 
    1.34 @@ -153,23 +153,23 @@
    1.35            }
    1.36          }
    1.37  
    1.38 -        this.value = value;
    1.39 -        if (min > value || !min.HasValue)
    1.40 -          min = value;
    1.41 -        if (max < value || !max.HasValue)
    1.42 -          max = value;
    1.43 +        this.currentValue = value;
    1.44 +        if (minValue > value || !minValue.HasValue)
    1.45 +          minValue = value;
    1.46 +        if (maxValue < value || !maxValue.HasValue)
    1.47 +          maxValue = value;
    1.48        }
    1.49      }
    1.50  
    1.51 -    public float? Min { get { return min; } }
    1.52 -    public float? Max { get { return max; } }
    1.53 +    public float? Min { get { return minValue; } }
    1.54 +    public float? Max { get { return maxValue; } }
    1.55  
    1.56      public void ResetMin() {
    1.57 -      min = null;
    1.58 +      minValue = null;
    1.59      }
    1.60  
    1.61      public void ResetMax() {
    1.62 -      max = null;
    1.63 +      maxValue = null;
    1.64      }
    1.65  
    1.66      public IEnumerable<SensorValue> Values {
    1.67 @@ -177,8 +177,9 @@
    1.68      }    
    1.69  
    1.70      public void Accept(IVisitor visitor) {
    1.71 -      if (visitor != null)
    1.72 -        visitor.VisitSensor(this);
    1.73 +      if (visitor == null)
    1.74 +        throw new ArgumentNullException("visitor");
    1.75 +      visitor.VisitSensor(this);
    1.76      }
    1.77  
    1.78      public void Traverse(IVisitor visitor) {