From 03845e4c92c66766d8bf13392759b46a5e0e774f Mon Sep 17 00:00:00 2001
From: Jim Miller <retiefjimm@gmail.com>
Date: Tue, 8 May 2018 17:16:52 -0500
Subject: [PATCH] Save/restore horz scroll when mirroring selection across
 splitter.

---
 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 a0630dc8d3..daea4c7f00 100644
--- a/src/calibre/gui2/library/views.py
+++ b/src/calibre/gui2/library/views.py
@@ -346,9 +346,12 @@ class BooksView(QTableView):  # {{{
             dest.selectionModel().select(src.selectionModel().selection(), QItemSelectionModel.ClearAndSelect)
             ci = dest.currentIndex()
             nci = src.selectionModel().currentIndex()
+            # Save/restore horz scroll.  ci column may be scrolled out of view.
+            hpos = dest.horizontalScrollBar().value()
             if ci.isValid():
                 nci = dest.model().index(nci.row(), ci.column())
             dest.selectionModel().setCurrentIndex(nci, QItemSelectionModel.NoUpdate)
+            dest.horizontalScrollBar().setValue(hpos)
             self.allow_mirroring = True
 
     def mirror_vscroll(self, src, *a):