rom/hyperlayers/getfirstfamilymember.c

   1 /*
   2     Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc:
   6     Lang: english
   7 */
   8 #include <aros/libcall.h>
   9 #include <graphics/clip.h>
  10 #include <graphics/layers.h>
  11 #include <utility/tagitem.h>
  12 #include "basicfuncs.h"
  13
  14 /*
  15  * Get the first member of a layer family. If the layer
  16  * has no children at all this function returns the
  17  * pointer to the same layer as given.
  18  * If the layer has children which again have children etc.
  19  * this function returns the frontmost child.
  20  */
  21
  22 struct Layer *GetFirstFamilyMember(struct Layer *l)
  23 {
  24   struct Layer * lastgood = l, *_l = l->front;
  25
  26   while ((NULL != _l) && (_l->nesting > l->nesting))
  27   {
  28     lastgood = _l;
  29     _l = _l->front;
  30   }
  31   return lastgood;
  32 } /* GetFirstFamilyMember */