自动布局的代码，完成中

AIStudio.Wpf.DiagramDesigner/Layout/ForceDirectedLayouter.cs

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+//using System;
+//using System.Threading;
+//using System.Threading.Tasks;
+//using System.Windows;
+
+//namespace AIStudio.Wpf.DiagramDesigner.Layout
+//{
+//    /// <summary>
+//    /// Reposition the nodes in a network using a physics-based approach.
+//    /// The nodes are interpreted as point masses, and the connections are represented
+//    /// by springs. This system, along with a few additional forces such as friction and a
+//    /// horizontal force, is then simulated to calculate the new position of the nodes.
+//    /// </summary>
+//    public class ForceDirectedLayouter
+//	{
+//		/// <summary>
+//		/// Layout the nodes in the network.
+//		/// </summary>
+//		/// <param name="config">The configuration to use.</param>
+//		/// <param name="maxIterations">The maximum amount of iterations after which the physics simulation ends.</param>
+//		public void Layout(Configuration config, int maxIterations)
+//		{
+//			var engine = new Engine();
+//			var state = new BufferedState();
+
+//            // Move each node so no two nodes have the exact same position.
+//            engine.ApplyRandomShift(config.Network);
+
+//            int deltaT = (int)Math.Ceiling(10.0 / (double)config.UpdatesPerIteration);
+//			for (int i = 0; i < maxIterations * config.UpdatesPerIteration; i++)
+//			{
+//				engine.Update(deltaT, state, config);
+//			}
+
+//			foreach (var newNodePosition in state.NodePositions)
+//			{
+//				newNodePosition.Key.Position = new Point(newNodePosition.Value.X, newNodePosition.Value.Y);
+//			}
+//		}
+
+//		/// <summary>
+//		/// Layout the nodes in the network, updating the user interface at each iteration.
+//		/// This method, contrary to Layout(), lets users see the simulation as it happens.
+//		/// The cancellation token should be used to end the simulation.
+//		/// </summary>
+//		/// <param name="config">The configuration to use.</param>
+//		/// <param name="token">A cancellation token to end the layout process.</param>
+//		/// <returns>The async task</returns>
+//		public async Task LayoutAsync(Configuration config, CancellationToken token)
+//		{
+//			var engine = new Engine();
+//			var state = new LiveState();
+
+//            // Move each node so no two nodes have the exact same position.
+//            engine.ApplyRandomShift(config.Network);
+
+//            DateTime start = DateTime.Now;
+//			TimeSpan t = TimeSpan.Zero;
+//			do
+//			{
+//				// Current real time
+//				var newT = DateTime.Now - start;
+//				var deltaT = newT - t;
+				
+//				// Current modified time
+//				//int virtT = (int)(t.Milliseconds * Settings.TimeModifier);
+//				int virtDeltaT = (int)(deltaT.Milliseconds * config.TimeModifier);
+//				int virtDeltaTPerUpdate = virtDeltaT / config.UpdatesPerIteration;
+//				for (int i = 0; i < config.UpdatesPerIteration; i++)
+//				{
+//					// Modified time in this update step
+//					engine.Update(virtDeltaTPerUpdate, state, config);
+//				}
+
+//				t = newT;
+
+//				await Task.Delay(14, token);
+//			} while (!token.IsCancellationRequested);
+//		}
+//	}
+//}