From fd656d29d8652816d37a5f116b51ef447ccc89e8 Mon Sep 17 00:00:00 2001
From: Dmitry Zhelnin <mitya_zh@mail.ru>
Date: Mon, 17 May 2021 16:34:00 +0300
Subject: [PATCH] TextBox: update command states on selection changes

---
 src/Avalonia.Controls/TextBox.cs | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/Avalonia.Controls/TextBox.cs b/src/Avalonia.Controls/TextBox.cs
index 69da667011..15a954b462 100644
--- a/src/Avalonia.Controls/TextBox.cs
+++ b/src/Avalonia.Controls/TextBox.cs
@@ -260,7 +260,11 @@ namespace Avalonia.Controls
             set
             {
                 value = CoerceCaretIndex(value);
-                SetAndRaise(SelectionStartProperty, ref _selectionStart, value);
+                var changed = SetAndRaise(SelectionStartProperty, ref _selectionStart, value);
+                if (changed)
+                {
+                    UpdateCommandStates();
+                }
                 if (SelectionStart == SelectionEnd)
                 {
                     CaretIndex = SelectionStart;
@@ -278,7 +282,11 @@ namespace Avalonia.Controls
             set
             {
                 value = CoerceCaretIndex(value);
-                SetAndRaise(SelectionEndProperty, ref _selectionEnd, value);
+                var changed = SetAndRaise(SelectionEndProperty, ref _selectionEnd, value);
+                if (changed)
+                {
+                    UpdateCommandStates();
+                }
                 if (SelectionStart == SelectionEnd)
                 {
                     CaretIndex = SelectionEnd;