From 91e8e5812b40e69c8abd1ebcfb80d548e738f54f Mon Sep 17 00:00:00 2001
From: ChrisTerBeke <c.terbeke@ultimaker.com>
Date: Tue, 10 Oct 2017 09:24:48 +0200
Subject: [PATCH] add back missing function

---
 plugins/3MFReader/WorkspaceDialog.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/plugins/3MFReader/WorkspaceDialog.py b/plugins/3MFReader/WorkspaceDialog.py
index 349dec177b..5e5eaf985e 100644
--- a/plugins/3MFReader/WorkspaceDialog.py
+++ b/plugins/3MFReader/WorkspaceDialog.py
@@ -285,6 +285,14 @@ class WorkspaceDialog(QObject):
         except:
             pass
 
+    @pyqtSlot(bool)
+    def _onVisibilityChanged(self, visible):
+        if not visible:
+            try:
+                self._lock.release()
+            except:
+                pass
+
     @pyqtSlot()
     def onOkButtonClicked(self):
         self._view.hide()