merge frame part of DispUtil to DispFrameUtil.

Disp/RenderingCanvas.cs

@@ -11,20 +11,20 @@ using System.Collections.Generic;
 using Hi.Geom;
 using Microsoft.Win32;  // Add this for SystemEvents
 
-namespace Hi.WpfPlus.Disp
+namespace Hi.WpfPlus.Disp;
+
+#region WPF Rendering Canvas
+/// <summary>
+/// Provides a WPF rendering canvas for 3D visualization of HiAPI components.
+/// Handles user interactions, rendering, and integration with the DispEngine system.
+/// </summary>
+/// <remarks>
+/// This canvas provides the core rendering capabilities for WPF applications using HiAPI.
+/// It manages mouse, keyboard, and touch events, and transforms them into appropriate
+/// actions in the 3D environment.
+/// </remarks>
+public class RenderingCanvas : UserControl, IDisposable
 {
-    #region WPF Rendering Canvas
-    /// <summary>
-    /// Provides a WPF rendering canvas for 3D visualization of HiAPI components.
-    /// Handles user interactions, rendering, and integration with the DispEngine system.
-    /// </summary>
-    /// <remarks>
-    /// This canvas provides the core rendering capabilities for WPF applications using HiAPI.
-    /// It manages mouse, keyboard, and touch events, and transforms them into appropriate
-    /// actions in the 3D environment.
-    /// </remarks>
-    public class RenderingCanvas : UserControl, IDisposable
-    {
 	#region Core_Properties
 	/// <summary>
 	/// The DispEngine instance that handles rendering and user interactions
@@ -469,6 +469,5 @@ namespace Hi.WpfPlus.Disp
 		GC.SuppressFinalize(this);
 	}
 	#endregion
-    }
-    #endregion
 }
+#endregion

Disp/RenderingWindow.cs

@@ -3,13 +3,13 @@ using System;
 using System.Windows;
 using System.Windows.Media;
 
-namespace Hi.WpfPlus.Disp
+namespace Hi.WpfPlus.Disp;
+
+/// <summary>
+/// Window for 3D rendering.
+/// </summary>
+public class RenderingWindow : Window, IGetDispEngine
 {
-    /// <summary>
-    /// Window for 3D rendering.
-    /// </summary>
-    public class RenderingWindow : Window, IGetDispEngine
-    {
 	/// <summary>
 	/// Gets the rendering canvas control used for displaying 3D content.
 	/// </summary>
@@ -51,5 +51,4 @@ namespace Hi.WpfPlus.Disp
 				RenderingCanvas.DispEngine.SetViewToHomeView();
 		}
 	}
-    }
 }

Disp/WpfDisp.cs

@@ -0,0 +1,60 @@
+using Google.Protobuf.WellKnownTypes;
+using Hi.Disp;
+using Hi.Geom;
+using System.Collections.Concurrent;
+using System.Windows;
+
+namespace Hi.WpfPlus.Disp;
+
+/// <summary>
+/// Registers WPF as the display framework for <see cref="DispFrameUtil"/>,
+/// supporting multiple windows identified by key.
+/// </summary>
+/// <remarks>
+/// <para>
+/// Usage pattern: call <see cref="DispFrameUtil.Call"/> to queue display content,
+/// then call <see cref="Run"/> to start the WPF application and show windows.
+/// </para>
+/// <para>
+/// Each unique key creates a separate <see cref="RenderingWindow"/>.
+/// Calling <see cref="DispFrameUtil.Call"/> with the same key updates the existing window.
+/// </para>
+/// <example>
+/// <code>
+/// // Queue display content (before or after Run)
+/// DispFrameUtil.CallDispFrame("Window1", displayee1);
+/// DispFrameUtil.CallDispFrame("Window2", displayee2);
+/// // Start the WPF application (blocks until all windows are closed)
+/// DispFrameWpf.Run();
+/// </code>
+/// </example>
+/// </remarks>
+public static class WpfDisp
+{
+	static readonly ConcurrentDictionary<string, RenderingWindow> KeyToWindowDictionary = new();
+
+	static WpfDisp()
+	{
+		DispFrameUtil.UpdateByDispEngineConfigFunc = ApplyConfig;
+	}
+	public static void Init() { }
+
+	static void ApplyConfig(string key, DispEngineConfig config)
+	{
+		if (!KeyToWindowDictionary.TryGetValue(key, out var window))
+		{
+			window = new RenderingWindow() { Title = key };
+			window.Closed += (s, e) => KeyToWindowDictionary.TryRemove(key, out _);
+			KeyToWindowDictionary[key] = window;
+			window.Show();
+		}
+
+		var dispEngine = window.GetDispEngine();
+		if (config.Displayee != null)
+			dispEngine.Displayee = config.Displayee;
+		if (config.SketchView == null)
+			config.SketchView = config.Displayee?.GetBox3d()?.FrontView;
+		if (config.SketchView != null)
+			dispEngine.SketchView = config.SketchView;
+	}
+}