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scripts/plot/ishold.m

changeset 10289: 4b124317dc38
parent:eb63fbe60fab
author: John W. Eaton <jwe@octave.org>
date: Tue Feb 09 20:58:55 2010 -0500 (72 minutes ago)
permissions: -rw-r--r--
description: base_properties::set_children: account for hidden children 
     1## Copyright (C) 2005, 2006, 2007, 2008 2009 John W. Eaton

     2##

     3## This file is part of Octave.

     4##

     5## Octave is free software; you can redistribute it and/or modify it

     6## under the terms of the GNU General Public License as published by

     7## the Free Software Foundation; either version 3 of the License, or (at

     8## your option) any later version.

     9##

    10## Octave is distributed in the hope that it will be useful, but

    11## WITHOUT ANY WARRANTY; without even the implied warranty of

    12## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    13## General Public License for more details.

    14##

    15## You should have received a copy of the GNU General Public License

    16## along with Octave; see the file COPYING.  If not, see

    17## <http://www.gnu.org/licenses/>.

    18

    19## -*- texinfo -*-

    20## @deftypefn {Function File} {} ishold

    21## Return true if the next line will be added to the current plot, or

    22## false if the plot device will be cleared before drawing the next line.

    23## @end deftypefn

    24

    25function retval = ishold (h)

    26

    27  if (nargin == 0)

    28    ax = gca ();

    29    fig = gcf ();

    30  elseif (nargin == 1)

    31    if (ishandle (h))

    32      if (isfigure (h))

    33	ax = get (h, "currentaxes");

    34	if (isempty (ax))

    35	  ax = __go_axes__ (h);

    36	  set (h, "currentaxes", ax);

    37	endif

    38	fig = h;

    39      elseif (strcmpi (get (h, "type"), "axes"))

    40	ax = h;

    41	fig = get (h, "parent");

    42      else

    43	error ("hold: expecting argument to be axes or figure graphics handle");

    44      endif

    45    else

    46      error ("hold: expecting argument to be axes or figure graphics handle");

    47    endif

    48  else

    49    print_usage ();

    50  endif

    51

    52  retval = (strcmpi (get (fig, "nextplot"), "add")

    53	    && strcmpi (get (ax, "nextplot"), "add"));

    54

    55endfunction