fix precision correct factor (Mexico), added diff, correction in percentage in Result Configuration

TBF/Rig/TestMethods/iPerlCommunication/iPerlHead/IperlHeadCfgCtrl.cs

@@ -2,6 +2,7 @@
 /// Copyright (c) 2015-2017 Sensus Metering Systems
 ///
 using System;
+using System.Globalization;
 using System.Net;
 using System.Windows.Forms;
 using Common;
@@ -33,6 +34,10 @@ namespace TBF.Rig.TestMethods.iPerlCommunication.iPerlHead
 		private void WaterMeterCfgCtrl_Load(object sender, EventArgs e)
 		{
 			nameLabel.Text = Strings.Name;
+            calibFactorNominalLabel.Text = GetLocalizedString("IperlCalibFactorNominal", "Default calibration factor:");
+            string calibFactorNominalTooltip = GetLocalizedString("IperlCalibFactorNominalTooltip", "Raw calibration factor representing 100 %. This value is used to calculate 'iPerl CalibFactor (%)' in the results configuration.");
+            calibFactorNominalToolTip.SetToolTip(calibFactorNominalLabel, calibFactorNominalTooltip);
+            calibFactorNominalToolTip.SetToolTip(calibFactorNominalTextBox, calibFactorNominalTooltip);
             classNameLabel.Text = config.Factory.ClassName;
             Redraw();
 		}
@@ -55,6 +60,10 @@ namespace TBF.Rig.TestMethods.iPerlCommunication.iPerlHead
             muxBoardNrTextBox.Text = config.MuxBoardNr.ToString();
 			groupTextBox.Text = config.Group.ToString();
             comboBoxCommunicationInterface.SelectedItem = config.CommunicationInterface.ToString();
+            double nominalCalibFactor = config.CalibFactorNominal > 0.0
+                ? config.CalibFactorNominal
+                : IperlHead.DefaultCalibFactorNominal;
+            calibFactorNominalTextBox.Text = nominalCalibFactor.ToString(CultureInfo.CurrentCulture);
             tabPage2.Controls.Add(new IperlHeadTestCtrl(config));
         }
 
@@ -71,6 +80,7 @@ namespace TBF.Rig.TestMethods.iPerlCommunication.iPerlHead
             muxBoardNrTextBox.Enabled = true;
 			groupTextBox.Enabled = true;
             comboBoxCommunicationInterface.Enabled = true;
+            calibFactorNominalTextBox.Enabled = true;
 		}
 
 		public CfgUpdateFlags VerifyCfg(ref string message)
@@ -127,6 +137,13 @@ namespace TBF.Rig.TestMethods.iPerlCommunication.iPerlHead
 				message += Environment.NewLine + string.Format(Strings.Invalid_0, groupLabel.Text);
 			}
 
+            double nominalCalibFactor;
+            if (!TryParseDouble(calibFactorNominalTextBox.Text, out nominalCalibFactor) || nominalCalibFactor <= 0.0)
+            {
+                flags |= CfgUpdateFlags.Error;
+                message += Environment.NewLine + string.Format(Strings.Invalid_0, calibFactorNominalLabel.Text);
+            }
+
 			return flags;
 		}
 
@@ -155,8 +172,22 @@ namespace TBF.Rig.TestMethods.iPerlCommunication.iPerlHead
 			config.Group = int.Parse(groupTextBox.Text);
             config.CommunicationInterface = (CommunicationInterface)comboBoxCommunicationInterface.SelectedIndex;
             config.HeadCommunicationComPortNr = int.Parse(headPortNrTextBox.Text);
+            double nominalCalibFactor;
+            if (TryParseDouble(calibFactorNominalTextBox.Text, out nominalCalibFactor))
+                config.CalibFactorNominal = nominalCalibFactor;
 
 			return flags;
 		}
+
+        private static bool TryParseDouble(string value, out double result)
+        {
+            return double.TryParse(value, NumberStyles.Float, CultureInfo.CurrentCulture, out result) ||
+                   double.TryParse(value, NumberStyles.Float, CultureInfo.InvariantCulture, out result);
+        }
+
+        private static string GetLocalizedString(string resourceName, string fallback)
+        {
+            return Strings.ResourceManager.GetString(resourceName, Strings.Culture) ?? fallback;
+        }
     }
 }