1 files changed, 20 insertions, 7 deletions
diff --git a/deck.h b/deck.h
index 3d6b299..b13eb89 100644
--- a/deck.h
+++ b/deck.h
@@ -3,10 +3,23 @@
 typedef struct Deck Deck;
 typedef struct Slide Slide;
 
-Deck *deck_new        (void);
-int   deck_get_height (Deck          *deck,
-		       int            width);
-void  deck_paint      (Deck          *deck,
-		       FooScrollArea *area,
-		       cairo_t       *cr,
-		       int            width);
+typedef void (* DeckChangeNotify) (gpointer data);
+
+Deck *deck_new              (DeckChangeNotify  notify,
+			     gpointer          data);
+void  deck_paint            (Deck             *deck,
+			     FooScrollArea    *area,
+			     cairo_t          *cr);
+/* Returns the slide the user is likely looking
+ * at, given the viewport.
+ */
+int
+deck_get_view_slide (Deck *deck,
+		     GdkRectangle *viewport);
+/* Returns the y coordinate of the nth slide given
+ * the width of the viewport
+ */
+int
+deck_get_slide_location (Deck *deck,
+			 GdkRectangle *viewport,
+			 int nth_slide);