From 4a93240e48b34ea69e612f549520cb498aeeea89 Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Fri, 28 Nov 2008 14:42:52 +0000
Subject: Multi-user graphics front-end

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1325 42af7a65-404d-4744-a932-0658087f49c3
---
 nuttx/graphics/nxmu/nx_getposition.c | 123 +++++++++++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 nuttx/graphics/nxmu/nx_getposition.c

(limited to 'nuttx/graphics/nxmu/nx_getposition.c')

diff --git a/nuttx/graphics/nxmu/nx_getposition.c b/nuttx/graphics/nxmu/nx_getposition.c
new file mode 100644
index 000000000..21bb985aa
--- /dev/null
+++ b/nuttx/graphics/nxmu/nx_getposition.c
@@ -0,0 +1,123 @@
+/****************************************************************************
+ * graphics/nxmu/nx_getposition.c
+ *
+ *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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 <sys/types.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/nx.h>
+#include "nxfe.h"
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nx_getposition
+ *
+ * Description:
+ *  Request the position and size information for the selected window.  The
+ *  values will be return asynchronously through the client callback function
+ *  pointer.
+ *
+ * Input Parameters:
+ *   hwnd   - The window handle
+ *
+ * Return:
+ *   OK on success; ERROR on failure with errno set appropriately
+ *
+ ****************************************************************************/
+
+int nx_getposition(NXWINDOW hwnd)
+{
+  FAR struct nxbe_window_s       *wnd = (FAR struct nxbe_window_s *)hwnd;
+  struct nxsvrmsg_getposition_s outmsg;
+  int                           ret;
+
+#ifdef CONFIG_DEBUG
+  if (!wnd)
+    {
+      errno = EINVAL;
+      return ERROR;
+    }
+#endif
+
+  /* Request the size/position info.
+   *
+   * It is tempting to just take the positional information from the window
+   * structure that we have in our hands now.  However, we need to run this through
+   * the server to keep things serialized.  There might, for example, be a pending
+   * size/position change and, in that case, this function would return the
+   * wrong info.
+   */
+
+  outmsg.msgid = NX_SVRMSG_GETPOSITION;
+  outmsg.wnd   = wnd;
+
+  ret = mq_send(wnd->conn->cwrmq, &outmsg, sizeof(struct nxsvrmsg_getposition_s), NX_SVRMSG_PRIO);
+  if (ret < 0)
+    {
+      gdbg("mq_send failed: %d\n", errno);
+      return ERROR;
+    }
+
+  return OK;
+}
-- 
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