nuttx/graphics/nxbe/nxbe_closewindow.c

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/****************************************************************************
* graphics/nxbe/nxbe_closewindow.c
*
* Copyright (C) 2008-2009, 2011 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 <stdlib.h>
#include <assert.h>
#include <debug.h>
#include <nuttx/nx/nxglib.h>
#include "nxbe.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxbe_closewindow
*
* Description:
* Close an existing window
*
* Input Parameters:
* wnd - The window to be closed (and deallocated)
*
* Return:
* None
*
****************************************************************************/
void nxbe_closewindow(struct nxbe_window_s *wnd)
{
FAR struct nxbe_state_s *be;
#ifdef CONFIG_DEBUG
if (!wnd)
{
return;
}
#endif
be = wnd->be;
/* The background window should never be closed */
DEBUGASSERT(wnd != &be->bkgd);
/* Is there a window above the one being closed? */
if (wnd->above)
{
/* Yes, now the window below that one is the window below
* the one being closed.
*/
wnd->above->below = wnd->below;
}
else
{
/* No, then the top window is the one below this (which
* can never be NULL because the background window is
* always at the true bottom of the list
*/
be->topwnd = wnd->below;
}
/* There is always a window below the one being closed (because
* the background is never closed. Now, the window above that
* is the window above the one that is being closed.
*/
wnd->below->above = wnd->above;
/* Redraw the windows that were below us (and may now be exposed) */
nxbe_redrawbelow(be, wnd->below, &wnd->bounds);
/* Then discard the window structure */
free(wnd);
}