Set queue length on startup

Queues are read from disk *before* libraries are read, meaning we can't
calculate the length right away.  But if we don't calculate the length,
then the first time a track is removed from a queue the length will be
set to (0 - track_length).  This is wrong.

Signed-off-by: Anna Schumaker <Anna@OcarinaProject.net>

gui/main.cpp

@@ -31,6 +31,7 @@ Gtk::Window *ocarina_init(int *argc, char ***argv)
 	deck::init();
 	library::init();
 	playlist::init();
+	deck::init2();
 
 	share_file("ocarina6.glade");
 	post_init_tabs();

include/deck.h

@@ -10,6 +10,7 @@ namespace deck
 {
 
 	void init();
+	void init2();
 	void read();
 	void write();
 

include/playqueue.h

@@ -64,6 +64,7 @@ public:
 	void del_track(unsigned int);
 	void track_updated(unsigned int);
 	unsigned int size();
+	void recalculate_length();
 
 	void add_sort(sort_t, bool ascending = true);
 	void reset_sort(sort_t, bool ascending = true);

lib/deck.cpp

@@ -45,6 +45,15 @@ void deck :: init()
 	get_callbacks()->on_queue_changed = write;
 }
 
+void deck :: init2()
+{
+	std::list<Playqueue>::iterator it;
+
+	library_playqueue.recalculate_length();
+	for (it = playqueue_deck.begin(); it != playqueue_deck.end(); it++)
+		it->recalculate_length();
+}
+
 void deck :: read()
 {
 	unsigned int num;

lib/playqueue.cpp

@@ -272,6 +272,17 @@ unsigned int Playqueue :: size()
 	return tracks.size();
 }
 
+void Playqueue :: recalculate_length()
+{
+	library :: Song song;
+
+	length = 0;
+	for (unsigned int i = 0; i < size(); i++) {
+		library::lookup(tracks[i], &song);
+		length += song.track->length;
+	}
+}
+
 
 /* Sorting function */
 class SortTracks {