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Diffstat (limited to 'nuttx/graphics/nxbe/nxbe_lower.c')
-rw-r--r-- | nuttx/graphics/nxbe/nxbe_lower.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/nuttx/graphics/nxbe/nxbe_lower.c b/nuttx/graphics/nxbe/nxbe_lower.c new file mode 100644 index 000000000..545342d5b --- /dev/null +++ b/nuttx/graphics/nxbe/nxbe_lower.c @@ -0,0 +1,125 @@ +/**************************************************************************** + * graphics/nxbe/nxbe_lower.c + * + * Copyright (C) 2008-2009, 2011 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 <stddef.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_lower + * + * Description: + * Lower the specified window to the bottom of the display. + * + ****************************************************************************/ + +void nxbe_lower(FAR struct nxbe_window_s *wnd) +{ + FAR struct nxbe_state_s *be = wnd->be; + FAR struct nxbe_window_s *below; + + /* If the window is already at the bottom, then there is nothing to do */ + + if (!wnd->below || wnd->below == &be->bkgd) + { + return; + } + + /* Remove the window from its current position in the list */ + + wnd->below->above = wnd->above; + + /* Was it at the top of the display? */ + + if (wnd->above) + { + /* No... it was in the middle somewhere */ + + wnd->above->below = wnd->below; + } + else + { + /* Yes.. set the new top window */ + + be->topwnd = wnd->below; + be->topwnd->above = NULL; + } + + /* Remember the window that was just below us */ + + below = wnd->below; + + /* Then put the lowered window at the bottom (just above the background window) */ + + wnd->below = &be->bkgd; + wnd->above = be->bkgd.above; + be->bkgd.above = wnd; + + /* Redraw the windows that were below us (but now are above) */ + + nxbe_redrawbelow(be, below, &wnd->bounds); +} |