[LyX/master] Fix Ticket #9741 misleading name for font-encoding setting "default".

[Günter Milde]

commit e37e4f537c70d75835441d84bc327c56805ecc3e
Author: Günter Milde <mi...@lyx.org>
Date:   Fri Oct 21 09:10:46 2016 +0200

    Fix Ticket #9741 misleading name for font-encoding setting "default".
    
    It would be nice, if the tooltip showed the value of
    lyxrc.fontenc, but too complicated for my simple patch.
---
 src/BufferParams.cpp              |    4 ++--
 src/frontends/qt4/GuiDocument.cpp |   17 +++++++++++++----
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/src/BufferParams.cpp b/src/BufferParams.cpp
index 50870c5..906061a 100644
--- a/src/BufferParams.cpp
+++ b/src/BufferParams.cpp
@@ -1647,7 +1647,7 @@ bool BufferParams::writeLaTeX(otexstream & os, 
LaTeXFeatures & features,
                   << from_ascii(fonts_default_family) << "}\n";
 
        // set font encoding
-       // XeTeX and LuaTeX (with OS fonts) do not need fontenc
+       // XeTeX and LuaTeX with Unicode fonts do not need fontenc
        if (!useNonTeXFonts && !features.isProvided("fontenc")
            && font_encoding() != "default") {
                // get main font encodings
@@ -2942,7 +2942,7 @@ vector<string> const BufferParams::font_encodings() const
 
        vector<string> fontencs;
 
-       // "default" means "no explicit font encoding"
+       // "default" means "no explicit font encoding, don't load fontenc.sty"
        if (doc_fontenc != "default") {
                fontencs = getVectorFromString(doc_fontenc);
                if (!language->fontenc().empty()
diff --git a/src/frontends/qt4/GuiDocument.cpp 
b/src/frontends/qt4/GuiDocument.cpp
index 2a40873..19fce60 100644
--- a/src/frontends/qt4/GuiDocument.cpp
+++ b/src/frontends/qt4/GuiDocument.cpp
@@ -859,9 +859,18 @@ GuiDocument::GuiDocument(GuiView & lv)
        fontModule->fontsizeCO->addItem(qt_("11"));
        fontModule->fontsizeCO->addItem(qt_("12"));
 
-       fontModule->fontencCO->addItem(qt_("Default"), QString("global"));
+       fontModule->fontencCO->addItem(qt_("Global Default"), 
QString("global"));
        fontModule->fontencCO->addItem(qt_("Custom"), QString("custom"));
-       fontModule->fontencCO->addItem(qt_("None (no fontenc)"), 
QString("default"));
+       fontModule->fontencCO->addItem(qt_("TeX default (OT1, no fontenc)"), 
QString("default"));
+       fontModule->fontencCO->setToolTip(
+                       qt_("Select LaTeX font encoding(s).\n"
+                           "The standard [Global Default] is "
+                               "\"T1 via 'fontenc' package\" (see 
Tools>Preferences>Output>LaTeX).\n"
+                               "Notes:\n"
+                               "TeX's default fonts (Computer Modern) are not 
available "
+                               "in T1 encoding, Latin Modern is the 
recommended lookalike.\n"
+                               "Font encodings for Greek and Cyrillic are 
automatically added if required."
+                          ));
 
        for (int n = 0; GuiDocument::fontfamilies_gui[n][0]; ++n)
                fontModule->fontsDefaultCO->addItem(
@@ -3060,7 +3069,7 @@ void GuiDocument::paramsToDialog()
        biblioChanged_ = false;
 
        // indices
-       // We may be called when there is no Buffer, e.g., when 
+       // We may be called when there is no Buffer, e.g., when
        // the last view has just been closed.
        bool const isReadOnly = isBufferAvailable() ? buffer().isReadonly() : 
false;
        indicesModule->update(bp_, isReadOnly);
@@ -3392,7 +3401,7 @@ void GuiDocument::paramsToDialog()
                        toqstr(bp_.fonts_cjk));
        else
                fontModule->cjkFontLE->setText(QString());
-       
+
        fontModule->microtypeCB->setChecked(bp_.use_microtype);
 
        fontModule->fontScCB->setChecked(bp_.fonts_expert_sc);