--- a/include/mb_redraw_man.h	Thu Nov 18 12:10:51 2010 +0800
+++ b/include/mb_redraw_man.h	Mon Nov 22 00:42:29 2010 +0800
@@ -243,31 +243,5 @@
 #define MONITOR_READ   1
 #define MONITOR_WRITE  2
 
-/*! \brief The backend engine mb_backend_t is used to define the interface to realize the MB.
- *
- * A backend is used to receive events from the system. The MB does not define the backend by itself.
- * Instead, it define an interface which allow the lower layer to implement the event system. Each
- * backend need to provides the following events.
- *
- * - keyboard event
- * - timer event
- * - image loader(?)
- * - render manager(?)
- */
-typedef struct {
-
-    void *(*init)(const char *display,int w,int h);
-    void (*free)(void *be);
-    void (*add_event)(void *be,int type, int fd, mb_eventcb_t f,void *arg);
-    void (*remove_event)(void *be,int type, int fd);
-    void (*loop)(void *be);
-    subject_t *(*kbevents)(void *be);
-    redraw_man_t *(*rdman)(void *be);
-    mb_tman_t *(*tman)(void *be);
-    ob_factory_t *(*factory)(void *be);
-    mb_img_ldr_t *(*loader)(void *be);
-} mb_backend_t;
-
-extern mb_backend_t backend;
 
 #endif /* __REDRAW_MAN_H_ */