From 0e37c78ed991410dbce8bd5239f41f6fc29eb8ad Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 13 Oct 2020 09:45:57 +0530
Subject: [PATCH] Fix a regression in 5.0 that caused performance of dialogs
 that contain title/series/tags edit fields to be very poor with large
 libraries.  Fixes #1898221 [Menu items on the Convert Books Box are slow to
 respond](https://bugs.launchpad.net/calibre/+bug/1898221)

Apparently in Qt 5.15 Qt queries size hints for all items in a list view
unless setuniformitemsizes is set.
---
 src/calibre/gui2/complete2.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/calibre/gui2/complete2.py b/src/calibre/gui2/complete2.py
index 9b49f6164c..9412abea72 100644
--- a/src/calibre/gui2/complete2.py
+++ b/src/calibre/gui2/complete2.py
@@ -94,6 +94,7 @@ class Completer(QListView):  # {{{
         self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
         self.setSelectionBehavior(self.SelectRows)
         self.setSelectionMode(self.SingleSelection)
+        self.setUniformItemSizes(True)
         self.setAlternatingRowColors(True)
         self.setModel(CompleteModel(self, sort_func=sort_func, strip_completion_entries=strip_completion_entries))
         self.setMouseTracking(True)