private void AddNodes(IEnumerable <INode> nodes)
{
if (nodes == null)
{
return;
}
foreach (INode node in nodes)
{
if (node != null)
{
_algorithm.AddNode(node);
var item = new NetworkViewNodeItem
{
Content = node
};
var binding = new Binding("NodeTemplate")
{
Source = this
};
BindingOperations.SetBinding(item, ContentPresenter.ContentTemplateProperty, binding);
SetZIndex(item, NodeZIndex);
_nodesToItems.Add(node, item);
Children.Add(item);
}
}
}
/// <summary>
/// Is called when the left mouse button is released.
/// </summary>
/// <param name="e"></param>
protected override void OnMouseLeftButtonUp(MouseButtonEventArgs e)
{
if (_mouseDraggingNode != null)
{
_algorithm.Unfreeze(_mouseDraggingNode.Content as INode);
_mouseDraggingNode = null;
ReleaseMouseCapture();
}
base.OnMouseLeftButtonUp(e);
}
/// <summary>
/// Is called when the left mouse button is pressed.
/// </summary>
/// <param name="e"></param>
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
HitTestResult result = VisualTreeHelper.HitTest(this, e.GetPosition(this));
var node = result.VisualHit.FindFirstAncestorOfType <NetworkViewNodeItem>();
if (node != null)
{
if (CaptureMouse())
{
_mouseDraggingNode = node;
_algorithm.Freeze(node.Content as INode);
e.Handled = true;
}
}
else
{
base.OnMouseLeftButtonDown(e);
}
}