From ca0095491b65b5b6b76759ace0d4e9c750afe4dd Mon Sep 17 00:00:00 2001
From: Robin Krom <robin.krom@gmail.com>
Date: Thu, 6 Aug 2020 17:02:26 +0200
Subject: [PATCH] Fixed an issue which was described in #217, also did some
 hardening that it doesn't happen on other locations in the TextContainer.

---
 Greenshot/Drawing/TextContainer.cs | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/Greenshot/Drawing/TextContainer.cs b/Greenshot/Drawing/TextContainer.cs
index 939dd3de6..ddfb2918e 100644
--- a/Greenshot/Drawing/TextContainer.cs
+++ b/Greenshot/Drawing/TextContainer.cs
@@ -158,9 +158,15 @@ namespace Greenshot.Drawing
 
         protected override void SwitchParent(Surface newParent)
         {
-            _parent.SizeChanged -= Parent_SizeChanged;
+            if (_parent != null)
+            {
+                _parent.SizeChanged -= Parent_SizeChanged;
+            }
             base.SwitchParent(newParent);
-            _parent.SizeChanged += Parent_SizeChanged;
+            if (_parent != null)
+            {
+                _parent.SizeChanged += Parent_SizeChanged;
+            }
         }
 
         private void Parent_SizeChanged(object sender, EventArgs e)
@@ -320,8 +326,12 @@ namespace Greenshot.Drawing
 
         private void HideTextBox()
         {
-            _parent.Focus();
+            _parent?.Focus();
             _textBox?.Hide();
+            if (_parent == null)
+            {
+                return;
+            }
             _parent.KeysLocked = false;
             _parent.Controls.Remove(_textBox);
         }