113 lines
3.7 KiB
C
113 lines
3.7 KiB
C
/****************************************************************************
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* graphics/nxbe/nxbe_lower.c
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*
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* Copyright (C) 2008-2009, 2011, 2019 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 <stddef.h>
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#include <debug.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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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxbe_lower
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*
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* Description:
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* Lower the specified window to the bottom of the display.
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*
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****************************************************************************/
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void nxbe_lower(FAR struct nxbe_window_s *wnd)
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{
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FAR struct nxbe_state_s *be = wnd->be;
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FAR struct nxbe_window_s *below;
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/* If the window is already at the bottom, then there is nothing to do.
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* Refuse to lower the background window; Refuse to lower a modal window.
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* It is impossible to lower a hidden window because it does not exist
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* in the hierarchy.
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*/
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if (wnd->below == NULL || wnd->below == &be->bkgd ||
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NXBE_ISMODAL(wnd) || NXBE_ISHIDDEN(wnd))
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{
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return;
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}
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/* Remove the window from its current position in the list */
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wnd->below->above = wnd->above;
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/* Was it at the top of the display? */
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if (wnd->above)
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{
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/* No... it was in the middle somewhere */
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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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/* Yes.. set the new top window */
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be->topwnd = wnd->below;
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be->topwnd->above = NULL;
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}
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/* Remember the window that was just below us */
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below = wnd->below;
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/* Then put the lowered window at the bottom (just above the background
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* window).
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*/
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wnd->below = &be->bkgd;
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wnd->above = be->bkgd.above;
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be->bkgd.above = wnd;
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/* Redraw the windows that were below us (but now are above) */
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nxbe_redrawbelow(be, below, &wnd->bounds);
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}
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