static void diagram_PreviewMouseMove(object sender, MouseEventArgs e)
{
var diagram = (RadDiagram)sender;
var diagramInfo = diagramInfos[diagram];
if (IsAutoScrollingAllowed(diagramInfo))
{
diagramInfo.AutoScrollingDirection = ConnectionManipulationAutoScrollBehavior.GetScrollingDirection(diagram, e.GetPosition(diagram));
if (!diagramInfo.ScrollingTimer.IsEnabled && diagramInfo.AutoScrollingDirection != ScrollingDirection.None)
{
diagramInfo.ScrollingTimer.Start();
}
// if the auto scrolling is running cancel the default drag operation
if (diagramInfo.ScrollingTimer.IsEnabled)
{
e.Handled = true;
}
}
}
