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diff --git a/nuttx/graphics/nxmu/nx_eventhandler.c b/nuttx/graphics/nxmu/nx_eventhandler.c
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+/****************************************************************************
+ * graphics/nxmu/nx_eventhandler.c
+ *
+ * Copyright (C) 2008-2009, 2011-2012 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <mqueue.h>
+#include <assert.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/nx/nx.h>
+#include "nxfe.h"
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nx_connected
+ *
+ * Description:
+ * The server has completed the connection and is ready.
+ *
+ ****************************************************************************/
+
+static inline void nx_connected(FAR struct nxfe_conn_s *conn)
+{
+ DEBUGASSERT(conn->state == NX_CLISTATE_NOTCONNECTED);
+ conn->state = NX_CLISTATE_CONNECTED;
+}
+
+/****************************************************************************
+ * Name: nx_disconnected
+ ****************************************************************************/
+
+static inline void nx_disconnected(FAR struct nxfe_conn_s *conn)
+{
+ /* Close the server and client MQs */
+
+ (void)mq_close(conn->cwrmq);
+ (void)mq_close(conn->crdmq);
+
+ /* And free the client structure */
+
+ free(conn);
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nx_eventhandler
+ *
+ * Description:
+ * The client code must call this function periodically to process
+ * incoming messages from the server. If CONFIG_NX_BLOCKING is defined,
+ * then this function not return until a server message is received.
+ *
+ * When CONFIG_NX_BLOCKING is not defined, the client must exercise
+ * caution in the looping to assure that it does not eat up all of
+ * the CPU bandwidth calling nx_eventhandler repeatedly. nx_eventnotify
+ * may be called to get a signal event whenever a new incoming server
+ * event is avaiable.
+ *
+ * Input Parameters:
+ * handle - the handle returned by nx_connect
+ *
+ * Return:
+ * OK: No errors occurred. If CONFIG_NX_BLOCKING is defined, then
+ * one or more server message was processed.
+ * ERROR: An error occurred and errno has been set appropriately. Of
+ * particular interest, it will return errno == EHOSTDOWN when the
+ * server is disconnected. After that event, the handle can no
+ * longer be used.
+ *
+ ****************************************************************************/
+
+int nx_eventhandler(NXHANDLE handle)
+{
+ FAR struct nxfe_conn_s *conn = (FAR struct nxfe_conn_s *)handle;
+ struct nxsvrmsg_s *msg;
+ struct nxbe_window_s *wnd;
+ uint8_t buffer[NX_MXCLIMSGLEN];
+ int nbytes;
+
+ /* Get the next message from our incoming message queue */
+
+ do
+ {
+ nbytes = mq_receive(conn->crdmq, buffer, NX_MXCLIMSGLEN, 0);
+ if (nbytes < 0)
+ {
+ /* EINTR is not an error. The wait was interrupted by a signal and
+ * we just need to try reading again.
+ */
+
+ if (errno != EINTR)
+ {
+ if (errno == EAGAIN)
+ {
+ /* EAGAIN is not an error. It occurs because the MQ is opened with
+ * O_NONBLOCK and there is no message available now.
+ */
+
+ return OK;
+ }
+ else
+ {
+ gdbg("mq_receive failed: %d\n", errno);
+ return ERROR;
+ }
+ }
+ }
+ }
+ while (nbytes < 0);
+
+ DEBUGASSERT(nbytes >= sizeof(struct nxclimsg_s));
+
+ /* Dispatch the message appropriately */
+
+ msg = (struct nxsvrmsg_s *)buffer;
+ gvdbg("Received msgid=%d\n", msg->msgid);
+ switch (msg->msgid)
+ {
+ case NX_CLIMSG_CONNECTED:
+ nx_connected(conn);
+ break;
+
+ case NX_CLIMSG_DISCONNECTED:
+ nx_disconnected(conn);
+ errno = EHOSTDOWN;
+ return ERROR;
+
+ case NX_CLIMSG_REDRAW:
+ {
+ FAR struct nxclimsg_redraw_s *redraw = (FAR struct nxclimsg_redraw_s *)buffer;
+ wnd = redraw->wnd;
+ DEBUGASSERT(wnd);
+ if (wnd->cb->redraw)
+ {
+ wnd->cb->redraw((NXWINDOW)wnd, &redraw->rect, redraw->more, wnd->arg);
+ }
+ }
+ break;
+
+ case NX_CLIMSG_NEWPOSITION:
+ {
+ FAR struct nxclimsg_newposition_s *postn = (FAR struct nxclimsg_newposition_s *)buffer;
+ wnd = postn->wnd;
+ DEBUGASSERT(wnd);
+ if (wnd->cb->position)
+ {
+ wnd->cb->position((NXWINDOW)wnd, &postn->size, &postn->pos, &postn->bounds, wnd->arg);
+ }
+ }
+ break;
+
+#ifdef CONFIG_NX_MOUSE
+ case NX_CLIMSG_MOUSEIN:
+ {
+ FAR struct nxclimsg_mousein_s *mouse = (FAR struct nxclimsg_mousein_s *)buffer;
+ wnd = mouse->wnd;
+ DEBUGASSERT(wnd);
+ if (wnd->cb->mousein)
+ {
+ wnd->cb->mousein((NXWINDOW)wnd, &mouse->pos, mouse->buttons, wnd->arg);
+ }
+ }
+ break;
+#endif
+
+#ifdef CONFIG_NX_KBD
+ case NX_CLIMSG_KBDIN:
+ {
+ FAR struct nxclimsg_kbdin_s *kbd = (FAR struct nxclimsg_kbdin_s *)buffer;
+ wnd = kbd->wnd;
+ DEBUGASSERT(wnd);
+ if (wnd->cb->kbdin)
+ {
+ wnd->cb->kbdin((NXWINDOW)wnd, kbd->nch, kbd->ch, wnd->arg);
+ }
+ }
+ break;
+#endif
+
+ case NX_CLIMSG_BLOCKED:
+ {
+ FAR struct nxclimsg_blocked_s *blocked = (FAR struct nxclimsg_blocked_s *)buffer;
+ wnd = blocked->wnd;
+ DEBUGASSERT(wnd);
+ if (wnd->cb->blocked)
+ {
+ wnd->cb->blocked((NXWINDOW)wnd, wnd->arg, blocked->arg);
+ }
+ }
+ break;
+
+ default:
+ gdbg("Unrecognized message opcode: %d\n", ((FAR struct nxsvrmsg_s *)buffer)->msgid);
+ break;
+ }
+
+ return OK;
+}
+
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