Enable windows to register to get notified when the mouse wheel is scrolled

1 files changed, 9 insertions, 0 deletions

diff --git a/include/client/window.h b/include/client/window.h
index 98d19a2b..e07e3509 100644
--- a/include/client/window.h
+++ b/include/client/window.h
@@ -27,11 +27,20 @@ struct cursor {
         struct wl_poitner *pointer;
 };
 
+enum scroll_direction {
+        SCROLL_UP,
+        SCROLL_DOWN,
+        SCROLL_LEFT,
+        SCROLL_RIGHT,
+};
+
 struct pointer_input {
         int last_x;
         int last_y;
 
         void (*notify_button)(struct window *window, int x, int y, uint32_t button);
+
+        void (*notify_scroll)(struct window *window, enum scroll_direction direction);
 };
 
 struct window {