ZoomAndPanSample.OverviewWindow.overviewZoomRectThumb_DragDelta C# (CSharp) Method

        private void overviewZoomRectThumb_DragDelta(object sender, DragDeltaEventArgs e)
        {
            //
            // Update the position of the overview rect as the user drags it around.
            //
            double newContentOffsetX = Math.Min(Math.Max(0.0, Canvas.GetLeft(overviewZoomRectThumb) + e.HorizontalChange), DataModel.Instance.ContentWidth - DataModel.Instance.ContentViewportWidth);
            Canvas.SetLeft(overviewZoomRectThumb, newContentOffsetX);

            double newContentOffsetY = Math.Min(Math.Max(0.0, Canvas.GetTop(overviewZoomRectThumb) + e.VerticalChange), DataModel.Instance.ContentHeight - DataModel.Instance.ContentViewportHeight);
            Canvas.SetTop(overviewZoomRectThumb, newContentOffsetY);
        }