in WPF. How to scroll Objects in ScrollViewer by mouse-dragging, like as iPhone?

Question

it\'s done well to scroll by mouse-wheel or scrollbar seed-dragging. but scrolling by mouse-dragging contents on scroll view is not done. How can i implement this action?

Answer 1

I found a way of resolving this. It's following...

    Point scrollMousePoint = new Point();
    double hOff = 1;
    private void scrollViewer_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        scrollMousePoint = e.GetPosition(scrollViewer);
        hOff = scrollViewer.HorizontalOffset;
        scrollViewer.CaptureMouse();
    }

    private void scrollViewer_PreviewMouseMove(object sender, MouseEventArgs e)
    {
        if(scrollViewer.IsMouseCaptured)
        {
            scrollViewer.ScrollToHorizontalOffset(hOff + (scrollMousePoint.X - e.GetPosition(scrollViewer).X));
        }
    }

    private void scrollViewer_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
    {
        scrollViewer.ReleaseMouseCapture();
    }

    private void scrollViewer_PreviewMouseWheel(object sender, MouseWheelEventArgs e)
    {
        scrollViewer.ScrollToHorizontalOffset(scrollViewer.HorizontalOffset + e.Delta);
    }

thanks!