+int mw_button_event_message(mwdevice_t *mwdevice, unsigned char *btnevt, int len, unsigned char opts)
+{
+#ifdef DEBUG
+ fprintf(stderr, " button %d options %d\n", btnevt[0], opts);
+#endif
+
+ if (mwdevice->mw_button_event_message_cb != NULL)
+ mwdevice->mw_button_event_message_cb(mwdevice, btnevt[0], opts, mwdevice->mw_btnevmsg_data);
+
+ return 0;
+}
+
+void mw_set_button_event_message_cb(mwdevice_t *mwdevice, void (*mw_button_event_message_cb) (mwdevice_t *mwdevice, unsigned char buttons, unsigned char options, void *user_data), void *user_data)
+{
+ if (mw_button_event_message_cb != NULL)
+ mwdevice->mw_button_event_message_cb = mw_button_event_message_cb;
+ if (user_data != NULL)
+ mwdevice->mw_btnevmsg_data = user_data;
+}
+