ocarina: Show the length of the currently visible playlist

I should eventually format this better...

Signed-off-by: Bryan Schumaker <bjschuma@gmail.com>

include/ocarina/body.h

@@ -25,6 +25,7 @@ namespace ocarina
 
 		void set_now_playing();
 		void update_controls();
+		void set_length_label_text(string &);
 
 		GtkWidget *playlist_init();
 		GtkWidget *footer_init();

include/ocarina/playlist.h

@@ -10,6 +10,7 @@ namespace ocarina
 
 	class Playlist : public libsaria::PlaylistRenderer {
 		private:
+			bool visible;
 			GtkWidget *label;
 			GtkWidget *box;
 			GtkWidget *treeview;
@@ -17,6 +18,7 @@ namespace ocarina
 			GtkTreeSelection *treesel;
 
 			void set_label_text();
+			void set_length_label_text();
 			void setup_treeview();
 
 		public:
@@ -24,6 +26,8 @@ namespace ocarina
 			Playlist(libsaria::Playlist *);
 			~Playlist();
 
+			void on_show();
+			void on_hide();
 			void switch_to();
 			void right_click(guint, guint64);
 			void select_none();

ocarina/body/footer.cpp

@@ -16,6 +16,7 @@ static GtkWidget *pause_button;
 static GtkWidget *stop_button;
 static GtkWidget *prev_button;
 static GtkWidget *next_button;
+static GtkWidget *length_label;
 static GstState last_state;
 
 static void add_page(string text, GtkWidget *page)
@@ -120,12 +121,16 @@ namespace ocarina
 		GtkWidget *footer = gtk_vbox_new(FALSE, 0);
 		GtkWidget *controls = make_controls();
 		notebook = gtk_notebook_new();
+		length_label = gtk_label_new("");
 
 		gtk_notebook_set_tab_pos(GTK_NOTEBOOK(notebook), GTK_POS_TOP);
 		g_object_set(notebook, "tab-border", 0, NULL);
 
+		gtk_misc_set_alignment(GTK_MISC(length_label), 1.0, 0.0);
+
 		gtk_box_pack_start(GTK_BOX(footer), controls, FALSE, FALSE, 0);
 		gtk_box_pack_start(GTK_BOX(footer), notebook, FALSE, FALSE, 0);
+		gtk_box_pack_start(GTK_BOX(footer), length_label, FALSE, FALSE, 0);
 
 		add_page("Now Playing", now_playing_page());
 		add_page("Library", library_page());
@@ -133,6 +138,7 @@ namespace ocarina
 
 		gtk_widget_show(footer);
 		gtk_widget_show(notebook);
+		gtk_widget_show(length_label);
 		return footer;
 	};
 
@@ -167,4 +173,9 @@ namespace ocarina
 		}
 	}
 
+	void body::set_length_label_text(string &text)
+	{
+		gtk_label_set_text(GTK_LABEL(length_label), text.c_str());
+	}
+
 }; /* Namespace: ocarina */

ocarina/playlist/playlist.cpp

@@ -22,6 +22,7 @@ namespace ocarina
 
 	Playlist::Playlist(unsigned int f) : libsaria::PlaylistRenderer(f)
 	{
+		visible = false;
 	}
 
 	Playlist::Playlist(libsaria::Playlist *plist): libsaria::PlaylistRenderer(PL_NONE)
@@ -33,6 +34,18 @@ namespace ocarina
 	{
 	}
 
+	void Playlist::set_length_label_text()
+	{
+		string text;
+		stringstream stream;
+		stream << playlist->get_size() << " ";
+		stream << "songs, " << playlist->get_length();
+		stream << " seconds";
+
+		text = stream.str();
+		body::set_length_label_text(text);
+	}
+
 	void Playlist::set_label_text()
 	{
 		string text;
@@ -43,6 +56,8 @@ namespace ocarina
 		text = stream.str();
 
 		gtk_label_set_text(GTK_LABEL(label), text.c_str());
+		if (visible)
+			set_length_label_text();
 	}
 
 	void Playlist::list_selected_tracks(list<libsaria::Track *> &tracks)
@@ -60,6 +75,17 @@ namespace ocarina
 		body::switch_to_page(box);
 	}
 
+	void Playlist::on_show()
+	{
+		visible = true;
+		set_length_label_text();
+	}
+
+	void Playlist::on_hide()
+	{
+		visible = false;
+	}
+
 	void Playlist::goto_index(unsigned int index)
 	{
 		GtkTreeIter iter;

ocarina/playlist/treeview.cpp

@@ -78,6 +78,18 @@ static GtkListStore *setup_liststore(GtkWidget *treeview)
 	return liststore;
 }
 
+static void mapped(GtkWidget *widget, gpointer data)
+{
+	ocarina::Playlist *plist = (ocarina::Playlist *)data;
+	plist->on_show();
+}
+
+static void unmapped(GtkWidget *widget, gpointer data)
+{
+	ocarina::Playlist *plist = (ocarina::Playlist *)data;
+	plist->on_hide();
+}
+
 namespace ocarina
 {
 
@@ -94,6 +106,8 @@ namespace ocarina
 		g_signal_connect(treeview, "row-activated", G_CALLBACK(track_selected), NULL);
 		g_signal_connect(treeview, "button-release-event", G_CALLBACK(show_rc_menu), this);
 		g_signal_connect(treeview, "key-press-event", G_CALLBACK(key_pressed), this);
+		g_signal_connect(treeview, "map", G_CALLBACK(mapped), this);
+		g_signal_connect(treeview, "unmap", G_CALLBACK(unmapped), this);
 
 		gtk_tree_view_set_rules_hint(GTK_TREE_VIEW(treeview), TRUE);
 		gtk_tree_view_set_model(GTK_TREE_VIEW(treeview), GTK_TREE_MODEL(liststore));