Add "Read" filter to main window

* src/data.c (data_get_unread_manga): New function.  Gets any manga
  that have unread volumes.
  (data_get_volumes_for_manga): Default `volumes' to `NULL' to make
  sure we don't get garbage by mistake.

* src/eom-main-window.c: Add new enum.  The filter states
  that the main screen has.
  (eom_main_window_load): Get a list of unread manga if the window's
  state indecates we're looking for them.
  (add_menu): Add read filter button, shows only unread manga.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/data.h b/src/data.h
index 9dbf5e6..eb2cd39 100644
--- a/src/data.h
+++ b/src/data.h
@@ -25,6 +25,7 @@ gboolean data_add_volume_to_manga(gint, gint);
 GList *data_get_incomplete_manga(void);
 GList *data_get_manga(void);
 Manga *data_get_manga_by_id(gint);
+GList *data_get_unread_manga(void);
 void data_get_volumes_for_manga(Manga*);
 gboolean data_mark_volume_read(gint, gint, gint);
 gboolean data_remove_volume_from_manga(gint, gint);