From 94de403265a9edb3a03edbf14aabe997a5db0f27 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Fri, 2 Feb 2018 13:24:39 +0530
Subject: [PATCH] Make mirroring a no-op when pin view is not visible

---
 src/calibre/gui2/library/views.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/calibre/gui2/library/views.py b/src/calibre/gui2/library/views.py
index 02fa6d3688..961a1e4f26 100644
--- a/src/calibre/gui2/library/views.py
+++ b/src/calibre/gui2/library/views.py
@@ -335,10 +335,13 @@ class BooksView(QTableView):  # {{{
     def set_pin_view_visibility(self, visible=False):
         self.pin_view.setVisible(visible)
         self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff if visible else Qt.ScrollBarAsNeeded)
+        self.mirror_selection_between_views(self)
 
     def mirror_selection_between_views(self, src):
         if self.allow_mirroring:
             dest = self.pin_view if src is self else self
+            if dest is self.pin_view and not dest.isVisible():
+                return
             self.allow_mirroring = False
             dest.selectionModel().select(src.selectionModel().selection(), QItemSelectionModel.ClearAndSelect)
             ci = dest.currentIndex()