Add Default Monospace Font chooser to Appearance dialog

dialogs/appearance-settings/appearance-dialog.glade

@@ -251,6 +251,52 @@
                     <property name="position">0</property>
                   </packing>
                 </child>
+                <child>
+                  <object class="GtkFrame" id="frame7">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="label_xalign">0</property>
+                    <property name="shadow_type">none</property>
+                    <child>
+                      <object class="GtkAlignment" id="alignment7">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="border_width">6</property>
+                        <property name="bottom_padding">6</property>
+                        <property name="left_padding">12</property>
+                        <child>
+                          <object class="GtkFontButton" id="gtk_monospace_fontname_button">
+                            <property name="visible">True</property>
+                            <property name="can_focus">True</property>
+                            <property name="receives_default">True</property>
+                            <property name="tooltip_text" translatable="yes">This font will be used as the default monospace font, for example by terminal emulators.</property>
+                            <property name="font">Monospace 12</property>
+                            <property name="title" translatable="yes">Select a default monospace font</property>
+                          </object>
+                        </child>
+                      </object>
+                    </child>
+                    <child type="label">
+                      <object class="GtkLabel" id="label14">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="label" translatable="yes">Default _Monospace Font</property>
+                        <property name="use_underline">True</property>
+                        <property name="mnemonic_widget">gtk_monospace_fontname_button</property>
+                        <attributes>
+                          <attribute name="weight" value="bold"/>
+                        </attributes>
+                      </object>
+                    </child>
+                  </object>
+                  <packing>
+                    <property name="expand">False</property>
+                    <property name="fill">True</property>
+                    <property name="position">1</property>
+                  </packing>
+                </child>
                 <child>
                   <object class="GtkFrame" id="frame4">
                     <property name="visible">True</property>
@@ -370,7 +416,7 @@
                   <packing>
                     <property name="expand">False</property>
                     <property name="fill">True</property>
-                    <property name="position">1</property>
+                    <property name="position">2</property>
                   </packing>
                 </child>
                 <child>
@@ -443,7 +489,7 @@
                   <packing>
                     <property name="expand">False</property>
                     <property name="fill">True</property>
-                    <property name="position">2</property>
+                    <property name="position">3</property>
                   </packing>
                 </child>
               </object>

dialogs/appearance-settings/main.c

@@ -1218,6 +1218,11 @@ appearance_settings_dialog_configure_widgets (GtkBuilder *builder)
     xfconf_g_property_bind (xsettings_channel,  "/Gtk/FontName", G_TYPE_STRING,
                             G_OBJECT (object), "font-name");
 
+    /* Monospace font name */
+    object = gtk_builder_get_object (builder, "gtk_monospace_fontname_button");
+    xfconf_g_property_bind (xsettings_channel,  "/Gtk/MonospaceFontName", G_TYPE_STRING,
+                            G_OBJECT (object), "font-name");
+
     /* Toolbar style */
     object = gtk_builder_get_object (builder, "gtk_toolbar_style_combo_box");
     appearance_settings_dialog_channel_property_changed (xsettings_channel, "/Gtk/ToolbarStyle", NULL, builder);

xfsettingsd/xsettings.xml

@@ -29,6 +29,7 @@
     <property name="CanChangeAccels" type="bool" value="false"/>
     <property name="ColorPalette" type="string" value="black:white:gray50:red:purple:blue:light blue:green:yellow:orange:lavender:brown:goldenrod4:dodger blue:pink:light green:gray10:gray30:gray75:gray90"/>
     <property name="FontName" type="string" value="Sans 10"/>
+    <property name="MonospaceFontName" type="string" value="Monospace 10"/>
     <property name="IconSizes" type="string" value=""/>
     <property name="KeyThemeName" type="string" value=""/>
     <property name="ToolbarStyle" type="string" value="icons"/>