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Display length & check digit of entered EAN-13 in metadata dialogue

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This commit is contained in:
Colin Fletcher 2015-02-11 00:24:11 +00:00 committed by Paul Davis
parent 561f62ba63
commit 6f2ca4194c
2 changed files with 46 additions and 0 deletions
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43
gtk2_ardour/session_metadata_dialog.cc
View File

@ -228,6 +228,7 @@ EAN13MetadataField::EAN13MetadataField (Getter getter, Setter setter, string con
entry = 0;
label = 0;
value_label = 0;
status_label = Gtk::manage (new Gtk::Label (""));
}
MetadataPtr
@ -249,6 +250,7 @@ EAN13MetadataField::load_data (ARDOUR::SessionMetadata const & data)
if (entry) {
entry->set_text (_value);
}
update_status ();
}
void
@ -257,6 +259,42 @@ 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;
} else {
sum += c * 3;
}
}
sum %= 10;
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 (expected %3)</span>",
_("EAN Check digit error"), p[12] - '0', sum));
}
} else if (len > 0) {
status_label->set_markup (string_compose(
"<span color=\"#ffa755\">%1: %2 (&lt;13)</span>",
_("EAN Length error"), len));
} else {
status_label->set_text("");
}
}
Gtk::Widget &
@ -694,6 +732,11 @@ SessionMetadataDialog<DataSet>::init_album_data ()
ptr = MetadataPtr (new EAN13MetadataField (&ARDOUR::SessionMetadata::barcode, &ARDOUR::SessionMetadata::set_barcode, _("EAN barcode")));
data_set->add_data_field (ptr);
// EAN13MetadataField is the only kind of MetadataField which has a status label.
EAN13MetadataField &emf = (EAN13MetadataField &) *ptr;
((Gtk::VBox &) data_set->get_widget()).pack_end (*emf.status_label);
emf.update_status ();
}
template <typename DataSet>

3
gtk2_ardour/session_metadata_dialog.h
View File

@ -135,6 +135,9 @@ class EAN13MetadataField : public MetadataField {
Gtk::Widget & name_widget ();
Gtk::Widget & value_widget ();
Gtk::Widget & edit_widget ();
Gtk::Label* status_label;
void update_status ();
private:
void update_value ();
std::string numeric_string (std::string const & str) const;