From f12d0cf1555b1ed10d4cc88473558af754745466 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Wed, 19 Feb 2014 16:28:14 +0530
Subject: [PATCH] Keep the editor responsive to user input by spinning the
 event loop after every line is re-highlighted.

---
 src/calibre/gui2/tweak_book/editor/syntax/base.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/calibre/gui2/tweak_book/editor/syntax/base.py b/src/calibre/gui2/tweak_book/editor/syntax/base.py
index 0ba4881935..60c544083a 100644
--- a/src/calibre/gui2/tweak_book/editor/syntax/base.py
+++ b/src/calibre/gui2/tweak_book/editor/syntax/base.py
@@ -65,4 +65,6 @@ class SyntaxHighlighter(QSyntaxHighlighter):
         except:
             import traceback
             traceback.print_exc()
+        finally:
+            QApplication.processEvents()  # Try to keep the editor responsive to user input