From a13dc44a7d4129321dfdf9170de1c94a3ee3c7a5 Mon Sep 17 00:00:00 2001
From: Ben Wallis <atomyc+github@gmail.com>
Date: Mon, 3 Dec 2018 16:31:19 +0000
Subject: [PATCH] Added comments

---
 Filtration/Views/ItemFilterBlockView.xaml.cs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Filtration/Views/ItemFilterBlockView.xaml.cs b/Filtration/Views/ItemFilterBlockView.xaml.cs
index e02df92..e830756 100644
--- a/Filtration/Views/ItemFilterBlockView.xaml.cs
+++ b/Filtration/Views/ItemFilterBlockView.xaml.cs
@@ -35,6 +35,10 @@ namespace Filtration.Views
         
         private void UIElement_OnPreviewMouseWheel(object sender, MouseWheelEventArgs e)
         {
+            // Prevents the ScrollViewer from handling mouse wheel events, and passes the events
+            // to the parent control instead. This is necessary because the ItemsControl that displays
+            // ItemFilterBlocks is in a ScrollViewer but we want to use the mouse wheel for scrolling
+            // up and down in ItemFilterScriptView rather than within the block.
             if (sender is ScrollViewer viewer && !e.Handled)
             {
                 e.Handled = true;