From dd6c18e62b9963baeefbe4fb07b2e6bd67dc2174 Mon Sep 17 00:00:00 2001
From: Lukas W <lukaswhl@gmail.com>
Date: Sat, 9 Mar 2019 18:57:12 +0100
Subject: [PATCH] Automation Editor: Don't accept drag events when there's no
 pattern

Fixes #4857
---
 src/gui/editors/AutomationEditor.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/gui/editors/AutomationEditor.cpp b/src/gui/editors/AutomationEditor.cpp
index 06eece23a..fafb83d0d 100644
--- a/src/gui/editors/AutomationEditor.cpp
+++ b/src/gui/editors/AutomationEditor.cpp
@@ -2565,6 +2565,9 @@ void AutomationEditorWindow::dropEvent( QDropEvent *_de )
 
 void AutomationEditorWindow::dragEnterEvent( QDragEnterEvent *_dee )
 {
+	if (! m_editor->validPattern() ) {
+		return;
+	}
 	StringPairDrag::processDragEnterEvent( _dee, "automatable_model" );
 }