From 9d35a105bd3cfa14bd139028490ce880ce4d7fb5 Mon Sep 17 00:00:00 2001
From: Colin Fletcher <colin.m.fletcher@googlemail.com>
Date: Tue, 10 Feb 2015 11:06:55 +0000
Subject: Add EAN barcode field to session metadata dialogue

Add an EAN13MetadataField type to the session metadata dialogue, and use it for
entry of the EAN barcode in the 'album' tab.
---
 gtk2_ardour/session_metadata_dialog.cc | 87 +++++++++++++++++++++++++++++++++-
 gtk2_ardour/session_metadata_dialog.h  | 29 ++++++++++++
 2 files changed, 115 insertions(+), 1 deletion(-)

(limited to 'gtk2_ardour')

diff --git a/gtk2_ardour/session_metadata_dialog.cc b/gtk2_ardour/session_metadata_dialog.cc
index 69f215a9e2..f4e708f62a 100644
--- a/gtk2_ardour/session_metadata_dialog.cc
+++ b/gtk2_ardour/session_metadata_dialog.cc
@@ -154,7 +154,7 @@ NumberMetadataField::load_data (ARDOUR::SessionMetadata const & data)
 void
 NumberMetadataField::update_value ()
 {
-	// Accpt only numbers
+	// Accept only numbers that will fit into a uint32_t
 	uint32_t number = str_to_uint (entry->get_text());
 	_value = uint_to_str (number);
 	entry->set_text (_value);
@@ -216,6 +216,88 @@ NumberMetadataField::str_to_uint (string const & str) const
 }
 
 
+
+/* 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;
+}
+
+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);
+	}
+}
+
+void
+EAN13MetadataField::update_value ()
+{
+	// Accept only numeric characters
+	_value = numeric_string (entry->get_text());
+	entry->set_text (_value);
+}
+
+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;
+}
+
 /* SessionMetadataSet */
 
 SessionMetadataSet::SessionMetadataSet (string const & name)
@@ -609,6 +691,9 @@ SessionMetadataDialog<DataSet>::init_album_data ()
 
 	ptr = MetadataPtr (new TextMetadataField (&ARDOUR::SessionMetadata::isrc, &ARDOUR::SessionMetadata::set_isrc, _("ISRC")));
 	data_set->add_data_field (ptr);
+
+	ptr = MetadataPtr (new EAN13MetadataField (&ARDOUR::SessionMetadata::barcode, &ARDOUR::SessionMetadata::set_barcode, _("EAN barcode")));
+	data_set->add_data_field (ptr);
 }
 
 template <typename DataSet>
diff --git a/gtk2_ardour/session_metadata_dialog.h b/gtk2_ardour/session_metadata_dialog.h
index 1599e50bb3..6dc4e6e371 100644
--- a/gtk2_ardour/session_metadata_dialog.h
+++ b/gtk2_ardour/session_metadata_dialog.h
@@ -120,6 +120,35 @@ class NumberMetadataField : public MetadataField {
 	guint width;
 };
 
+/// MetadataField that accepts EAN-13 data only
+class EAN13MetadataField : public MetadataField {
+  private:
+	typedef std::string (ARDOUR::SessionMetadata::*Getter) () const;
+	typedef void (ARDOUR::SessionMetadata::*Setter) (std::string const &);
+  public:
+	EAN13MetadataField (Getter getter, Setter setter, std::string const & field_name, guint width = 13);
+	MetadataPtr copy ();
+
+	void save_data (ARDOUR::SessionMetadata & data) const;
+	void load_data (ARDOUR::SessionMetadata const & data);
+
+	Gtk::Widget & name_widget ();
+	Gtk::Widget & value_widget ();
+	Gtk::Widget & edit_widget ();
+  private:
+	void update_value ();
+        std::string numeric_string (std::string const & str) const;
+
+	Getter getter;
+	Setter setter;
+
+	Gtk::Label* label;
+	Gtk::Label* value_label;
+	Gtk::Entry* entry;
+
+	guint width;
+};
+
 /// Interface for MetadataFields
 class SessionMetadataSet : public ARDOUR::SessionHandlePtr {
   public:
-- 
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