1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
## Copyright (C) 2008-2013 Ben Abbott
##
## This file is part of Octave.
##
## Octave is free software; you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 3 of the License, or (at
## your option) any later version.
##
## Octave is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Octave; see the file COPYING. If not, see
## <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Command} {} cla
## @deftypefnx {Command} {} cla reset
## @deftypefnx {Function File} {} cla (@var{hax})
## @deftypefnx {Function File} {} cla (@var{hax}, "reset")
## Clear the current axes.
##
## @code{cla} operates by deleting child graphic objects with visible
## handles (HandleVisibility = @qcode{"on"}).
##
## If the optional argument @qcode{"reset"} is specified, delete all child
## objects including those with hidden handles and reset all axis properties
## to their defaults. However, the following properties are not reset:
## Position, Units.
##
## If the first argument @var{hax} is an axes handle, then operate on
## this axis rather than the current axes returned by @code{gca}.
## @seealso{clf, delete, reset}
## @end deftypefn
## Author: Ben Abbott <bpabbott@mac.com>
## Created: 2008-10-03
function cla (varargin)
if (nargin > 2)
print_usage ();
elseif (nargin == 0)
hax = gca;
do_reset = false;
elseif (nargin == 1)
if (isscalar (varargin{1}) && isaxes (varargin{1}))
hax = varargin{1};
do_reset = false;
elseif (ischar (varargin{1}) && strcmpi (varargin{1}, "reset"))
hax = gca;
do_reset = true;
else
print_usage ();
endif
else
if (isscalar (varargin{1}) && isaxes (varargin{1})
&& ischar (varargin{2}) && strcmpi (varargin{2}, "reset"))
hax = varargin{1};
do_reset = true;
else
print_usage ();
endif
endif
if (! do_reset)
delete (get (hax, "children"));
else
__go_axes_init__ (hax, "replace");
__request_drawnow__ ();
endif
endfunction
%!test
%! hf = figure ("visible", "off");
%! unwind_protect
%! plot (1:10);
%! assert (! isempty (get (gca, "children")));
%! cla ();
%! assert (isempty (get (gca, "children")));
%! unwind_protect_cleanup
%! close (hf);
%! end_unwind_protect
%!test
%! hf = figure ("visible", "off");
%! unwind_protect
%! hax = gca;
%! plot (hax, 1:10);
%! set (hax, "interpreter", "tex");
%! cla (hax);
%! kids = get (hax, "children");
%! assert (numel (kids), 0);
%! assert (get (hax, "interpreter"), "tex");
%! plot (hax, 1:10);
%! cla (hax, "reset");
%! kids = get (hax, "children");
%! assert (numel (kids), 0);
%! assert (get (hax, "interpreter"), "none");
%! unwind_protect_cleanup
%! close (hf);
%! end_unwind_protect
|
