Correctly update ScrollViewer viewport.

10 years ago · d64a163ae9
1 changed files with 12 additions and 2 deletions
--- a/src/Perspex.Controls/ScrollViewer.cs
+++ b/src/Perspex.Controls/ScrollViewer.cs
@ -208,8 +208,18 @@ namespace Perspex.Controls
        /// </summary>
        public Size Viewport
        {
-            get { return _viewport; }
-            private set { SetAndRaise(ViewportProperty, ref _viewport, value); }
+            get
+            {
+                return _viewport;
+            }
+
+            private set
+            {
+                if (SetAndRaise(ViewportProperty, ref _viewport, value))
+                {
+                    CalculatedPropertiesChanged();
+                }
+            }
        }

        /// <summary>