/// <summary>
/// Position and resize all children.
/// </summary>
/// <param name="finalSize"></param>
/// <returns></returns>
protected override System.Windows.Size ArrangeOverride(System.Windows.Size finalSize)
{
var actualRect = new Rect(0, 0, ActualWidth, ActualHeight);
foreach (Line line in _edgesToItems.Values)
{
line.Arrange(actualRect);
}
if (_currentPositions != null)
{
Vector offset = GetNodeOffset(finalSize);
foreach (var node in _currentPositions)
{
Point position = node.Value - offset;
Vector nodeOffset;
NetworkViewNodeItem item;
if (_nodesToItems.TryGetValue(node.Key, out item))
{
if (ReferenceEquals(item, _mouseDraggingNode))
{
_algorithm.SetPosition(node.Key, item.Position);
}
else
{
item.DisplayPosition = position;
item.Position = node.Value;
}
item.Arrange(new Rect(item.DisplayPosition, item.DesiredSize));
nodeOffset = new Vector(item.DesiredSize.Width / 2, item.DesiredSize.Height / 2);
}
else
{
nodeOffset = new Vector(0, 0);
}
foreach (var pair in _edgesToItems)
{
Point edgePosition = item.DisplayPosition + nodeOffset;
IEdge edge = pair.Key;
Line line = pair.Value;
if (ReferenceEquals(edge.Node1, node.Key))
{
line.X1 = edgePosition.X;
line.Y1 = edgePosition.Y;
}
if (ReferenceEquals(edge.Node2, node.Key))
{
line.X2 = edgePosition.X;
line.Y2 = edgePosition.Y;
}
}
}
}
return(finalSize);
}
