1 files changed, 106 insertions, 0 deletions
diff --git a/Xwt.WPF/Xwt.WPFBackend/ScrollControlBackend.cs b/Xwt.WPF/Xwt.WPFBackend/ScrollControlBackend.cs
new file mode 100644
index 00000000..3c0808ba
--- /dev/null
+++ b/Xwt.WPF/Xwt.WPFBackend/ScrollControlBackend.cs
@@ -0,0 +1,106 @@
+//
+// ScrollControlBackend.cs
+//
+// Author:
+//       lluis <>
+//
+// Copyright (c) 2014 lluis
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+using System;
+using Xwt.Backends;
+using System.Windows.Controls;
+
+namespace Xwt.WPFBackend
+{
+	public class ScrollControlBackend: Backend, IScrollControlBackend
+	{
+		double scrollValue;
+		bool isVertical;
+		ScrollViewer targetScrollViewer;
+
+		public ScrollControlBackend()
+		{
+		}
+
+		public ScrollControlBackend (ScrollViewer s, bool isVertical)
+		{
+			targetScrollViewer = s;
+			this.isVertical = isVertical;
+			scrollValue = Value;
+			targetScrollViewer.ScrollChanged += HandleScrollChanged;
+		}
+
+		void HandleScrollChanged (object sender, ScrollChangedEventArgs e)
+		{
+			if (Value != scrollValue) {
+				scrollValue = Value;
+				Context.InvokeUserCode (EventSink.OnValueChanged);
+			}
+		}
+
+		public void Initialize(IScrollControlEventSink eventSink)
+		{
+			EventSink = eventSink;
+		}
+
+		public double Value
+		{
+			get { return isVertical ? targetScrollViewer.VerticalOffset : targetScrollViewer.HorizontalOffset; }
+			set {
+				if (isVertical)
+					targetScrollViewer.ScrollToVerticalOffset(value);
+				else
+					targetScrollViewer.ScrollToVerticalOffset(value);
+			}
+		}
+
+		public double LowerValue
+		{
+			get { return 0; }
+		}
+
+		public double UpperValue
+		{
+			get { return isVertical ? targetScrollViewer.ScrollableHeight : targetScrollViewer.ScrollableWidth; }
+		}
+
+		public double PageIncrement
+		{
+			get { return PageSize; }
+		}
+
+		public double StepIncrement
+		{
+			get { return 1; }
+		}
+
+		public double PageSize
+		{
+			get { return isVertical ? targetScrollViewer.ViewportWidth : targetScrollViewer.ViewportHeight; }
+		}
+
+		internal IScrollControlEventSink EventSink
+		{
+			get;
+			private set;
+		}
+	}
+}
+