142 lines
4.7 KiB
C
142 lines
4.7 KiB
C
/****************************************************************************
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* graphics/nxbe/nxbe_closewindow.c
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*
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* Copyright (C) 2008-2009, 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <assert.h>
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#include <debug.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/nx/nxglib.h>
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#include "nxbe.h"
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxbe_closewindow
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*
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* Description:
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* Close an existing window
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*
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* Input Parameters:
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* wnd - The window to be closed (and deallocated using the user-space
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* allocator)
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*
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* Return:
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* None
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*
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****************************************************************************/
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void nxbe_closewindow(struct nxbe_window_s *wnd)
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{
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FAR struct nxbe_state_s *be;
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#ifdef CONFIG_DEBUG
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if (!wnd)
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{
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return;
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}
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#endif
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be = wnd->be;
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/* The background window should never be closed */
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DEBUGASSERT(wnd != &be->bkgd);
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/* Is there a window above the one being closed? */
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if (wnd->above)
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{
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/* Yes, now the window below that one is the window below
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* the one being closed.
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*/
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wnd->above->below = wnd->below;
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}
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else
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{
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/* No, then the top window is the one below this (which
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* can never be NULL because the background window is
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* always at the true bottom of the list
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*/
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be->topwnd = wnd->below;
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}
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/* There is always a window below the one being closed (because
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* the background is never closed. Now, the window above that
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* is the window above the one that is being closed.
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*/
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wnd->below->above = wnd->above;
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/* Redraw the windows that were below us (and may now be exposed) */
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nxbe_redrawbelow(be, wnd->below, &wnd->bounds);
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/* Then discard the window structure. Here we assume that the user-space
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* allocator was used.
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*/
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kufree(wnd);
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}
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