From 8699c20c97e440808e93090e3837df3d75208724 Mon Sep 17 00:00:00 2001
From: "zinovyev.petr" <petr.zinovyev@devexpress.com>
Date: Thu, 28 Dec 2017 14:30:21 +0300
Subject: [PATCH] Fix touch mouse scrolling

---
 ICSharpCode.AvalonEdit/Rendering/TextView.cs | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/ICSharpCode.AvalonEdit/Rendering/TextView.cs b/ICSharpCode.AvalonEdit/Rendering/TextView.cs
index 4ac1c31f..7843ede5 100644
--- a/ICSharpCode.AvalonEdit/Rendering/TextView.cs
+++ b/ICSharpCode.AvalonEdit/Rendering/TextView.cs
@@ -1469,28 +1469,24 @@ void IScrollInfo.MouseWheelUp()
 		{
 			((IScrollInfo)this).SetVerticalOffset(
 				scrollOffset.Y - (SystemParameters.WheelScrollLines * DefaultLineHeight));
-			OnScrollChange();
 		}
 		
 		void IScrollInfo.MouseWheelDown()
 		{
 			((IScrollInfo)this).SetVerticalOffset(
 				scrollOffset.Y + (SystemParameters.WheelScrollLines * DefaultLineHeight));
-			OnScrollChange();
 		}
 		
 		void IScrollInfo.MouseWheelLeft()
 		{
 			((IScrollInfo)this).SetHorizontalOffset(
 				scrollOffset.X - (SystemParameters.WheelScrollLines * WideSpaceWidth));
-			OnScrollChange();
 		}
 		
 		void IScrollInfo.MouseWheelRight()
 		{
 			((IScrollInfo)this).SetHorizontalOffset(
 				scrollOffset.X + (SystemParameters.WheelScrollLines * WideSpaceWidth));
-			OnScrollChange();
 		}
 		
 		bool defaultTextMetricsValid;
@@ -1591,6 +1587,7 @@ void IScrollInfo.SetHorizontalOffset(double offset)
 				InvalidateVisual();
 				textLayer.InvalidateVisual();
 			}
+			OnScrollChange();
 		}
 		
 		void IScrollInfo.SetVerticalOffset(double offset)
@@ -1600,6 +1597,7 @@ void IScrollInfo.SetVerticalOffset(double offset)
 				SetScrollOffset(new Vector(scrollOffset.X, offset));
 				InvalidateMeasure(DispatcherPriority.Normal);
 			}
+			OnScrollChange();
 		}
 		
 		Rect IScrollInfo.MakeVisible(Visual visual, Rect rectangle)