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      1 /*	$NetBSD: update.c,v 1.1 2015/10/26 23:09:49 uwe Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2015 Valery Ushakov
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __RCSID("$NetBSD: update.c,v 1.1 2015/10/26 23:09:49 uwe Exp $");
     30 
     31 #include "panel_impl.h"
     32 
     33 
     34 void
     35 update_panels(void)
     36 {
     37 	PANEL *p;
     38 
     39 	/*
     40 	 * For each panel tell panels above it they need to refresh
     41 	 * regions that overlap (are above) this panel.  This ensures
     42 	 * that even if a panel below was touched, it's still
     43 	 * overwritten by a panel above.
     44 	 *
     45 	 * Note that we also need to do this during "destructive"
     46 	 * operations (hide, move, replace window - which see).
     47 	 */
     48 	FOREACH_PANEL (p) {
     49 		PANEL *above = p;
     50 		while ((above = PANEL_ABOVE(above)) != NULL) {
     51 			touchoverlap(p->win, above->win);
     52 		}
     53 	}
     54 
     55 	/*
     56 	 * This is what effects Z-order: the window updated later
     57 	 * overwrites contents of the windows below (before) it.
     58 	 */
     59 	FOREACH_PANEL (p) {
     60 		wnoutrefresh(p->win);
     61 	}
     62 }
     63