Added null checks to enable display of XL results (#2290)

Author: Alexander-Sol

MetaMorpheus/GUI/MetaDraw/MetaDraw.xaml.cs

@@ -1,3 +1,4 @@
+using Easy.Common.Extensions;
 using EngineLayer;
 using GuiFunctions;
 using Nett;
@@ -261,7 +262,10 @@ private void dataGridScanNums_SelectedCellsChanged(object sender, SelectedCellsC
             {
 
                 int descriptionLineCount = MetaDrawSettings.SpectrumDescription.Count(p => p.Value);
-                descriptionLineCount += (int)Math.Floor((psm.ProteinName.Length - 20) / 26.0);
+                if (psm.ProteinName.IsNotNullOrEmptyOrWhiteSpace())
+                {
+                    descriptionLineCount += (int)Math.Floor((psm.ProteinName.Length - 20) / 26.0);
+                }
                 if (psm.ProteinAccession.Length > 10)
                     descriptionLineCount++;
                 double verticalOffset = descriptionLineCount * 14;

MetaMorpheus/GuiFunctions/MetaDraw/DrawnSequence.cs

@@ -66,11 +66,13 @@ public void AnnotateBaseSequence(string baseSequence, string fullSequence, int y
             }
             double canvasWidth = SequenceDrawingCanvas.Width;
             int spacing = 12;
+            int psmStartResidue = psm.StartAndEndResiduesInProtein != null
+                    ? int.Parse(psm.StartAndEndResiduesInProtein.Split("to")[0].Replace("[", ""))
+                    : 0;
 
             // draw initial amino acid number
             if (stationary && MetaDrawSettings.DrawNumbersUnderStationary)
             {
-                int psmStartResidue = int.Parse(psm.StartAndEndResiduesInProtein.Split("to")[0].Replace("[", ""));
                 var startAA = (MetaDrawSettings.FirstAAonScreenIndex + psmStartResidue).ToString().ToCharArray().Reverse().ToArray();
                 double x = 22;
 
@@ -108,7 +110,6 @@ public void AnnotateBaseSequence(string baseSequence, string fullSequence, int y
             // draw final amino acid number
             if (stationary && MetaDrawSettings.DrawNumbersUnderStationary)
             {
-                int psmStartResidue = int.Parse(psm.StartAndEndResiduesInProtein.Split("to")[0].Replace("[", ""));
                 var endAA = (MetaDrawSettings.FirstAAonScreenIndex + MetaDrawSettings.NumberOfAAOnScreen + psmStartResidue - 1).ToString();
                 canvasWidth += spacing;
                 double x = canvasWidth;