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/****************************************************************************
* graphics/nxsu/nx_constructwindow.c
*
* Copyright (C) 2008-2009, 2012-2013 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 <stdlib.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/kmalloc.h>
#include <nuttx/nx/nx.h>
#include "nxfe.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nx_constructwindow
*
* Description:
* This function is the same a nx_openwindow EXCEPT that the client provides
* the window structure instance. nx_constructwindow will initialize the
* the pre-allocated window structure for use by NX. This function is
* provided in addition to nx_open window in order to support a kind of
* inheritance: The caller's window structure may include extensions that
* are not visible to NX.
*
* NOTE: hwnd must have been allocated using kmalloc() (or related allocators)
* Once provided to nx_constructwindow() that memory is owned and managed
* by NX. On certain error conditions or when the window is closed, NX will
* free the window.
*
* Input Parameters:
* handle - The handle returned by nx_connect
* hwnd - The pre-allocated window structure.
* cb - Callbacks used to process window events
* arg - User provided value that will be returned with NX callbacks.
*
* Return:
* OK on success; ERROR on failure with errno set appropriately. In the
* case of ERROR, NX will have deallocated the pre-allocated window.
*
****************************************************************************/
int nx_constructwindow(NXHANDLE handle, NXWINDOW wnd,
FAR const struct nx_callback_s *cb, FAR void *arg)
{
FAR struct nxfe_state_s *fe = (FAR struct nxfe_state_s *)handle;
FAR struct nxbe_window_s *wnd = (FAR struct nxbe_window_s *)hwnd;
FAR struct nxbe_state_s *be = &fe->be;
#ifdef CONFIG_DEBUG
if (!wnd)
{
set_errno(EINVAL);
return ERROR;
}
if (!fe || !cb)
{
kfree(wnd);
errno = EINVAL;
return ERROR;
}
#endif
/* Initialize the window structure */
wnd->be = be;
wnd->cb = cb;
wnd->arg = arg;
/* Insert the new window at the top on the display. topwnd is
* never NULL (it may point only at the background window, however)
*/
wnd->above = NULL;
wnd->below = be->topwnd;
be->topwnd->above = wnd;
be->topwnd = wnd;
/* Report the initialize size/position of the window */
nxfe_reportposition((NXWINDOW)wnd);
/* Provide the initial mouse settings */
#ifdef CONFIG_NX_MOUSE
nxsu_mousereport(wnd);
#endif
return OK;
}
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