From 13e13ccd9a959327b88b59c5dc8b5d83d74a937c Mon Sep 17 00:00:00 2001
From: David Sansome <me@davidsansome.com>
Date: Sun, 13 May 2012 17:41:38 +0100
Subject: [PATCH] Work around a bug in Qt where the wheelScrollLines setting is
 ignored.  Fixes issue 2824.

---
 src/main.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/main.cpp b/src/main.cpp
index 4a5916ad5..ec0b0f865 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -303,6 +303,17 @@ int main(int argc, char *argv[]) {
   IncreaseFDLimit();
 
   QtSingleApplication a(argc, argv);
+
+  // A bug in Qt means the wheel_scroll_lines setting gets ignored and replaced
+  // with the default value of 3 in QApplicationPrivate::initialize.
+  {
+    QSettings qt_settings(QSettings::UserScope, "Trolltech");
+    qt_settings.beginGroup("Qt");
+    QApplication::setWheelScrollLines(
+          qt_settings.value("wheelScrollLines",
+                            QApplication::wheelScrollLines()).toInt());
+  }
+
 #ifdef Q_OS_DARWIN
   QCoreApplication::setLibraryPaths(
       QStringList() << QCoreApplication::applicationDirPath() + "/../PlugIns");