+
+void
+SubtitleContent::set_subtitle_y_scale (double s)
+{
+ {
+ boost::mutex::scoped_lock lm (_mutex);
+ _subtitle_y_scale = s;
+ }
+ signal_changed (SubtitleContentProperty::SUBTITLE_Y_SCALE);
+}
+
+void
+SubtitleContent::set_subtitle_language (string language)
+{
+ {
+ boost::mutex::scoped_lock lm (_mutex);
+ _subtitle_language = language;
+ }
+ signal_changed (SubtitleContentProperty::SUBTITLE_LANGUAGE);
+}
+
+string
+SubtitleContent::identifier () const
+{
+ SafeStringStream s;
+ s << Content::identifier()
+ << "_" << raw_convert<string> (subtitle_x_scale())
+ << "_" << raw_convert<string> (subtitle_y_scale())
+ << "_" << raw_convert<string> (subtitle_x_offset())
+ << "_" << raw_convert<string> (subtitle_y_offset());
+
+ /* The language is for metadata only, and doesn't affect
+ how this content looks.
+ */
+
+ return s.str ();
+}
+
+void
+SubtitleContent::add_font (shared_ptr<Font> font)
+{
+ _fonts.push_back (font);
+ connect_to_fonts ();
+}
+
+void
+SubtitleContent::connect_to_fonts ()
+{
+ BOOST_FOREACH (boost::signals2::connection& i, _font_connections) {
+ i.disconnect ();
+ }
+
+ _font_connections.clear ();
+
+ BOOST_FOREACH (shared_ptr<Font> i, _fonts) {
+ _font_connections.push_back (i->Changed.connect (boost::bind (&SubtitleContent::font_changed, this)));
+ }
+}
+
+void
+SubtitleContent::font_changed ()
+{
+ signal_changed (SubtitleContentProperty::FONTS);
+}
+