100 lines
3.0 KiB
C
100 lines
3.0 KiB
C
/****************************************************************************
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* graphics/nxbe/nxbe_lower.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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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