+
+/* EAN13MetadataField */
+
+EAN13MetadataField::EAN13MetadataField (Getter getter, Setter setter, string const & field_name, guint width) :
+ MetadataField (field_name),
+ getter (getter),
+ setter (setter),
+ width (width)
+{
+ entry = 0;
+ label = 0;
+ value_label = 0;
+ status_label = Gtk::manage (new Gtk::Label (""));
+}
+
+MetadataPtr
+EAN13MetadataField::copy ()
+{
+ return MetadataPtr (new EAN13MetadataField (getter, setter, _name, width));
+}
+
+void
+EAN13MetadataField::save_data (ARDOUR::SessionMetadata & data) const
+{
+ CALL_MEMBER_FN (data, setter) (_value);
+}
+
+void
+EAN13MetadataField::load_data (ARDOUR::SessionMetadata const & data)
+{
+ _value = CALL_MEMBER_FN (data, getter) ();
+ if (entry) {
+ entry->set_text (_value);
+ }
+ update_status ();
+}
+
+void
+EAN13MetadataField::update_value ()
+{
+ // Accept only numeric characters
+ _value = numeric_string (entry->get_text());
+ entry->set_text (_value);
+ update_status ();
+}
+
+void
+EAN13MetadataField::update_status ()
+{
+ int len = _value.length ();
+ if (len == 13) {
+ // calculate EAN-13 modulo 10 check digit
+ int sum = 0;
+ const char *p = _value.c_str();
+ for (int i = 0; i < 12; i++) {
+ char c = p[i] - '0';
+ if (i % 2) {
+ sum += c * 3;
+ } else {
+ sum += c;
+ }
+ }
+ sum %= 10;
+ if (sum)
+ sum = 10 - sum;
+
+ if (sum == p[12] - '0') {
+ status_label->set_markup (string_compose(
+ "<span color=\"green\">%1: %2</span>",
+ _("EAN Check digit OK"), sum));
+ } else {
+ status_label->set_markup (string_compose(
+ "<span color=\"#ffa755\">%1: %2 (%3 %4)</span>",
+ _("EAN Check digit error"), p[12] - '0', _("expected"), sum));
+ }
+ } else if (len > 0) {
+ status_label->set_markup (string_compose(
+ "<span color=\"#ffa755\">%1: %2 (<13)</span>",
+ _("EAN Length error"), len));
+ } else {
+ status_label->set_text("");
+ }
+}
+
+Gtk::Widget &
+EAN13MetadataField::name_widget ()
+{
+ label = Gtk::manage (new Gtk::Label(_name + ':'));
+ label->set_alignment (1, 0.5);
+ return *label;
+}
+
+Gtk::Widget &
+EAN13MetadataField::value_widget ()
+{
+ value_label = Gtk::manage (new Gtk::Label(_value));
+ return *value_label;
+}
+
+Gtk::Widget &
+EAN13MetadataField::edit_widget ()
+{
+ entry = Gtk::manage (new Gtk::Entry());
+
+ entry->set_text (_value);
+ entry->set_width_chars (width);
+ entry->set_max_length (13);
+ entry->signal_changed().connect (sigc::mem_fun(*this, &EAN13MetadataField::update_value));
+
+ return *entry;
+}
+
+string
+EAN13MetadataField::numeric_string (string const & str) const
+{
+ string tmp (str);
+ string::size_type i;
+ while ((i = tmp.find_first_not_of("1234567890")) != string::npos) {
+ tmp.erase (i, 1);
+ }
+ return tmp;
+}
+