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Disp/RenderingForm.cs

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+using Hi.Disp;
+using Hi.Disp.Flag;
+using System;
+using System.Collections.Concurrent;
+using System.Threading;
+using System.Windows.Forms;
+
+namespace Hi.WinForm.Disp
+{
+	/// <summary>
+	/// A <see cref="Form"/> contains <see cref="RenderingCanvas"/>.
+	/// This class is usually used for debug due to its simplicity.
+	/// </summary>
+	public partial class RenderingForm : Form,IGetDispEngine
+	{
+		static readonly Form seedForm = new Form();
+		private static readonly ConcurrentDictionary<string, RenderingForm> displayerMap
+			= new ConcurrentDictionary<string, RenderingForm>(4, 4);
+		/// <summary>
+		/// See <see cref="Call(string, IDisplayee[])"/> to get the information.
+		/// </summary>
+		public static ConcurrentDictionary<string, RenderingForm> DisplayerMap { get => displayerMap; }
+		/// <summary>
+		/// Ctor.
+		/// </summary>
+		/// <param name="displayees">displayees</param>
+		internal RenderingForm(params IDisplayee[] displayees)
+		{
+			InitializeComponent();
+			Displayer = new RenderingCanvas(displayees);
+			this.Controls.Add(Displayer);
+			//Displayer.DispEngine.Start();
+		}
+		/// <summary>
+		/// The contained <see cref="RenderingCanvas"/>.
+		/// </summary>
+		public RenderingCanvas Displayer { get; }
+		/// <summary>
+		/// Create and obtain a <see cref="RenderingForm"/> if the key has not existed; Otherwise, the old one is obtained.
+		/// <paramref name="displayees"/> are set to the obtained <see cref="RenderingForm"/>.
+		/// The dictionary of this function is <see cref="DisplayerMap"/>.
+		/// </summary>
+		/// <param name="key">key</param>
+		/// <param name="displayees">The displayees set to the obtained <see cref="RenderingForm"/>.</param>
+		/// <returns>A <see cref="RenderingForm"/> obtained by the key.</returns>
+		public static RenderingForm Call(string key, params IDisplayee[] displayees)
+		{
+			if (displayerMap.TryGetValue(key, out RenderingForm f))
+			{
+				f.Displayer.DispEngine.Displayee = new DispList(displayees);
+				return f;
+			}
+			else
+			{
+				_ = seedForm.Handle;
+				seedForm.Invoke(new Action(() =>
+				{
+					RenderingForm ff = new RenderingForm(displayees)
+					{
+						Text = key,
+						Visible = true
+					};
+					displayerMap.TryAdd(key, ff);
+				}));
+
+				RenderingForm fff = null;
+				while (!displayerMap.TryGetValue(key, out fff))
+					Thread.Sleep(1);
+				return fff;
+			}
+		}
+		/// <summary>
+		/// Clean up any resources being used.
+		/// </summary>
+		/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+		protected override void Dispose(bool disposing)
+		{
+			if (disposing && (components != null))
+			{
+				Displayer.Dispose();
+				components.Dispose();
+			}
+			base.Dispose(disposing);
+		}
+		/// <inheritdoc/>
+		public DispEngine GetDispEngine()
+		{
+			return Displayer.DispEngine;
+		}
+	}
+}