From d1fa6f10e595643c7a4220654c6eaee9d8920251 Mon Sep 17 00:00:00 2001
From: Richard Heck <rgheck@lyx.org>
Date: Sun, 1 Apr 2018 22:18:37 -0400
Subject: [PATCH] Set preamble tab stop to 4 chars.

---
 src/frontends/qt4/GuiDocument.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/frontends/qt4/GuiDocument.cpp b/src/frontends/qt4/GuiDocument.cpp
index f5af06ede0..0ff70a897c 100644
--- a/src/frontends/qt4/GuiDocument.cpp
+++ b/src/frontends/qt4/GuiDocument.cpp
@@ -473,6 +473,10 @@ PreambleModule::PreambleModule(QWidget * parent)
 	connect(findButtonPB, SIGNAL(clicked()), this, SLOT(findText()));
 	connect(findLE, SIGNAL(returnPressed()), this, SLOT(findText()));
 	checkFindButton();
+	// https://stackoverflow.com/questions/13027091/how-to-override-tab-width-in-qt
+	const int tabStop = 4;
+	QFontMetrics metrics(preambleTE->currentFont());
+	preambleTE->setTabStopWidth(tabStop * metrics.width(' '));
 }