+
+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);
+}
+
+bool
+SubtitleContent::has_subtitles () const
+{
+ return has_text_subtitles() || has_image_subtitles();
+}