private void AssociatedElement_ManipulationCompleted(object sender, ManipulationCompletedRoutedEventArgs e)
{
AssociatedElement.ManipulationMode = ManipulationModes.None;
if (movingOperation != null)
{
movingOperation.Complete();
movingOperation = null;
}
scrollViewer = null;
}
private void AssociatedElement_ManipulationStarted(object sender, ManipulationStartedRoutedEventArgs e)
{
scrollViewer = AssociatedElement.FindParent <ScrollViewer>();
if (movingOperation != null)
{
movingOperation.Cancel();
movingOperation = null;
}
if (scrollViewer != null)
{
movingOperation = AcquireOperation(e.Position.ToVector2());
}
}
private NodeMovingOperation AcquireOperation(Vector2 position)
{
var mindmap = AssociatedElement.FindParent <Mindmap>();
if (mindmap?.Renderer == null)
{
return(null);
}
var result = mindmap.Renderer.HitTest(position);
if (result != null && result.RenderNode != mindmap.TextEditingNode)
{
return(NodeMovingOperation.Start(mindmap, result.RenderNode));
}
return(null);
}