From d39a940955e065ef298ca73a730c1f021419505e Mon Sep 17 00:00:00 2001
From: Tig <tig@users.noreply.github.com>
Date: Mon, 25 Nov 2024 20:17:04 -0700
Subject: [PATCH] Added Applicaton.ClearScreenNextIteration

---
 Terminal.Gui/Application/Application.Run.cs    | 5 +++++
 Terminal.Gui/Application/Application.Screen.cs | 9 +++++++++
 Terminal.Gui/Application/Application.cs        | 2 ++
 Terminal.Gui/View/View.Layout.cs               | 9 ++++++++-
 4 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/Terminal.Gui/Application/Application.Run.cs b/Terminal.Gui/Application/Application.Run.cs
index 7511f8216..ebba96404 100644
--- a/Terminal.Gui/Application/Application.Run.cs
+++ b/Terminal.Gui/Application/Application.Run.cs
@@ -505,6 +505,11 @@ public static partial class Application // Run (Begin, Run, End, Stop)
     {
         bool neededLayout = View.Layout (TopLevels.Reverse (), Screen.Size);
 
+        if (ClearScreenNextIteration)
+        {
+            forceDraw = true;
+            ClearScreenNextIteration = false;
+        }
         if (forceDraw)
         {
             Driver?.ClearContents ();
diff --git a/Terminal.Gui/Application/Application.Screen.cs b/Terminal.Gui/Application/Application.Screen.cs
index c5bf6d6fd..9edd29313 100644
--- a/Terminal.Gui/Application/Application.Screen.cs
+++ b/Terminal.Gui/Application/Application.Screen.cs
@@ -67,4 +67,13 @@ public static partial class Application // Screen related stuff
 
         return true;
     }
+
+    /// <summary>
+    ///     Gets or sets whether the screen will be cleared, and all Views redrawn, during the next Application iteration.
+    /// </summary>
+    /// <remarks>
+    ///     This is typicall set to true when a View's <see cref="View.Frame"/> changes and that view has no
+    ///     SuperView (e.g. when <see cref="Application.Top"/> is moved or resized.
+    /// </remarks>
+    public static bool ClearScreenNextIteratio { get; set; }
 }
diff --git a/Terminal.Gui/Application/Application.cs b/Terminal.Gui/Application/Application.cs
index d9e6c68d9..85a234cef 100644
--- a/Terminal.Gui/Application/Application.cs
+++ b/Terminal.Gui/Application/Application.cs
@@ -215,6 +215,8 @@ public static partial class Application
 
         Navigation = null;
 
+        ClearScreenNextIteration = false;
+
         AddApplicationKeyBindings ();
 
         // Reset synchronization context to allow the user to run async/await,
diff --git a/Terminal.Gui/View/View.Layout.cs b/Terminal.Gui/View/View.Layout.cs
index 1b37f9725..833d5bdb2 100644
--- a/Terminal.Gui/View/View.Layout.cs
+++ b/Terminal.Gui/View/View.Layout.cs
@@ -557,7 +557,14 @@ public partial class View // Layout APIs
                 SetTitleTextFormatterSize ();
             }
 
-            SuperView?.SetNeedsDraw ();
+            if (SuperView is { })
+            {
+                SuperView?.SetNeedsDraw ();
+            }
+            else
+            {
+              //  Application.ClearScreenNextIteration = true;
+            }
         }
 
         if (TextFormatter.ConstrainToWidth is null)