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annotate scripts/plot/util/newplot.m @ 19627:446c46af4b42 stable

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strip trailing whitespace from most source files * Makefile.am, NEWS, build-aux/common.mk, configure.ac, doc/Makefile.am, doc/doxyhtml/Makefile.am, doc/interpreter/Makefile.am, doc/interpreter/arith.txi, doc/interpreter/audio.txi, doc/interpreter/basics.txi, doc/interpreter/bugs.txi, doc/interpreter/container.txi, doc/interpreter/cp-idx.txi, doc/interpreter/data.txi, doc/interpreter/debug.txi, doc/interpreter/diagperm.txi, doc/interpreter/diffeq.txi, doc/interpreter/doccheck/README, doc/interpreter/doccheck/spellcheck, doc/interpreter/emacs.txi, doc/interpreter/errors.txi, doc/interpreter/eval.txi, doc/interpreter/expr.txi, doc/interpreter/external.txi, doc/interpreter/fn-idx.txi, doc/interpreter/func.txi, doc/interpreter/geometry.txi, doc/interpreter/geometryimages.m, doc/interpreter/gpl.txi, doc/interpreter/grammar.txi, doc/interpreter/gui.txi, doc/interpreter/image.txi, doc/interpreter/install.txi, doc/interpreter/interp.txi, doc/interpreter/interpimages.m, 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scripts/statistics/distributions/frnd.m, scripts/statistics/distributions/gamrnd.m, scripts/statistics/distributions/geornd.m, scripts/statistics/distributions/hygernd.m, scripts/statistics/distributions/kolmogorov_smirnov_cdf.m, scripts/statistics/distributions/laplace_cdf.m, scripts/statistics/distributions/laplace_pdf.m, scripts/statistics/distributions/logistic_cdf.m, scripts/statistics/distributions/logistic_pdf.m, scripts/statistics/distributions/lognrnd.m, scripts/statistics/distributions/nbincdf.m, scripts/statistics/distributions/nbininv.m, scripts/statistics/distributions/nbinpdf.m, scripts/statistics/distributions/nbinrnd.m, scripts/statistics/distributions/normrnd.m, scripts/statistics/distributions/poissinv.m, scripts/statistics/distributions/poissrnd.m, scripts/statistics/distributions/tinv.m, scripts/statistics/distributions/trnd.m, scripts/statistics/distributions/unidcdf.m, scripts/statistics/distributions/unidpdf.m, scripts/statistics/distributions/unidrnd.m, scripts/statistics/distributions/unifrnd.m, scripts/statistics/distributions/wblrnd.m, scripts/statistics/models/module.mk, scripts/statistics/tests/kruskal_wallis_test.m, scripts/strings/base2dec.m, scripts/strings/deblank.m, scripts/strings/dec2base.m, scripts/strings/dec2bin.m, scripts/strings/dec2hex.m, scripts/strings/mat2str.m, scripts/strings/ostrsplit.m, scripts/strings/regexptranslate.m, scripts/strings/str2num.m, scripts/strings/strcat.m, scripts/strings/strjoin.m, scripts/strings/strsplit.m, scripts/strings/strtok.m, scripts/strings/strtrim.m, scripts/strings/strtrunc.m, scripts/strings/substr.m, scripts/testfun/__run_test_suite__.m, scripts/testfun/speed.m, scripts/testfun/test.m, scripts/time/asctime.m, scripts/time/datenum.m, scripts/time/datevec.m, scripts/time/weekday.m, src/Makefile.am, test/Makefile.am, test/build-bc-overload-tests.sh, test/build-sparse-tests.sh, test/jit.tst, test/line-continue.tst: Strip trailing whitespace.
author John W. Eaton <jwe@octave.org>
date Tue, 20 Jan 2015 08:26:57 -0500
parents d63878346099
children 4197fc428c7d
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d63878346099 maint: Update copyright notices for release.
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1 ## Copyright (C) 2005-2013 John W. Eaton
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
44c91c5dfe1d [project @ 2007-01-30 19:16:52 by jwe]
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {} newplot ()
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21 ## @deftypefnx {Function File} {} newplot (@var{hfig})
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22 ## @deftypefnx {Function File} {} newplot (@var{hax})
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23 ## @deftypefnx {Function File} {@var{hax} =} newplot (@dots{})
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24 ## Prepare graphics engine to produce a new plot.
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25 ##
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26 ## This function is called at the beginning of all high-level plotting
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27 ## functions. It is not normally required in user programs. @code{newplot}
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28 ## queries the @qcode{"NextPlot"} field of the current figure and axis to
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29 ## determine what to do.
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30 ##
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31 ## @multitable @columnfractions .25 .75
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32 ## @headitem Figure NextPlot @tab Action
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33 ## @item @qcode{"new"} @tab Create a new figure and make it the current figure.
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34 ##
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35 ## @item @qcode{"add"} (default) @tab Add new graphic objects to the current figure.
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36 ##
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37 ## @item @qcode{"replacechildren"} @tab Delete child objects whose HandleVisibility is
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38 ## set to @qcode{"on"}. Set NextPlot property to @qcode{"add"}. This
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39 ## typically clears a figure, but leaves in place hidden objects such as
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40 ## menubars. This is equivalent to @code{clf}.
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41 ##
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42 ## @item @qcode{"replace"} @tab Delete all child objects of the figure and
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43 ## reset all figure properties to their defaults. However, the following
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44 ## four properties are not reset: Position, Units, PaperPosition, PaperUnits.
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45 ## This is equivalent to @code{clf reset}.
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46 ## @end multitable
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47 ##
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48 ## @multitable @columnfractions .25 .75
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49 ## @headitem Axis NextPlot @tab Action
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50 ## @item @qcode{"add"} @tab Add new graphic objects to the current axes. This is
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51 ## equivalent to @code{hold on}.
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52 ##
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53 ## @item @qcode{"replacechildren"} @tab Delete child objects whose HandleVisibility is
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54 ## set to @qcode{"on"}, but leave axis properties unmodified. This typically
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55 ## clears a plot, but preserves special settings such as log scaling for
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56 ## axes. This is equivalent to @code{cla}.
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57 ##
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58 ## @item @qcode{"replace"} (default) @tab Delete all child objects of the
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59 ## axis and reset all axis properties to their defaults. However, the
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60 ## following properties are not reset: Position, Units. This is equivalent
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61 ## to @code{cla reset}.
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62 ## @end multitable
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63 ##
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64 ## If the optional input @var{hfig} or @var{hax} is given then prepare the
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65 ## specified figure or axes rather than the current figure and axes.
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66 ##
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67 ## The optional return value @var{hax} is a graphics handle to the created
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68 ## axes object (not figure).
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69 ##
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70 ## @strong{Caution:} Calling @code{newplot} may change the current figure and
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71 ## current axis.
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72 ## @end deftypefn
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73
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74 ## FIXME: The Matlab function takes an optional list of file handles, hsave,
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75 ## which are not deleted when the figure and axes are prepared.
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76 ## I'm sure there is a good reason for that, but coding such
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77 ## compatibility is really tricky and doesn't serve much purpose since
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78 ## newplot is nearly exclusively used by Octave's internal plotting
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79 ## functions. In Octave's case the argument is almost always null,
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80 ## or occasionally the axis handle to plot into.
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81
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82 function hax = newplot (hsave = [])
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83
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84 if (nargin > 1)
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85 print_usage ();
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86 endif
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87
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88 cf = [];
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89 ca = [];
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90
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91 if (! isempty (hsave))
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92 ## Find the first valid axes
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93 ca = ancestor (hsave, "axes", "toplevel");
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94 if (iscell (ca))
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95 ca = [ca{:}];
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96 endif
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97 ca = ca(find (ca, 1));
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98 hsave(hsave == ca) = [];
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99 ## Next, find the figure associated with any axis found
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100 if (! isempty (ca))
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101 cf = ancestor (ca, "figure", "toplevel");
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102 else
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103 cf = ancestor (hsave, "figure", "toplevel");
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104 if (iscell (cf))
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105 cf = [cf{:}];
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106 endif
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107 cf = cf(find (cf, 1));
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108 endif
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109 endif
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110
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111 if (isempty (cf))
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112 ## get current figure, or create a new one if necessary
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113 cf = gcf ();
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114 else
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115 ## switch to figure provided without causing other updates
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116 set (0, "currentfigure", cf);
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117 endif
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118
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119 fnp = get (cf, "nextplot");
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120 switch (fnp)
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121 case "add"
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122 ## Default case. Doesn't require action.
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123 case "new"
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124 ## Ordinarily, create a new figure to hold plot.
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125 ## But, if user has requested preparing a specific axis, then
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126 ## use the existing figure to hold the requested axis.
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127 if (isempty (ca))
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128 cf = figure ();
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129 endif
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130 case "replacechildren"
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131 kids = get (cf, "children");
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132 if (! isempty (ca))
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133 kids(kids == ca) = [];
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134 endif
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135 delete (kids);
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136 case "replace"
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137 kids = allchild (cf);
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138 if (! isempty (ca))
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139 kids(kids == ca) = [];
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140 endif
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141 delete (kids);
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142 reset (cf);
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143 endswitch
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144 set (cf, "nextplot", "add"); # Matlab compatibility
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145
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146 if (isempty (ca))
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147 ca = gca ();
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148 deleteall = true;
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149 else
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150 set (cf, "currentaxes", ca);
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151 deleteall = false;
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152 endif
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153
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154 ## FIXME: Is this necessary anymore?
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155 ## It seems like a kluge that belongs somewhere else.
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156 if (strcmp (get (ca, "__hold_all__"), "off"))
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157 __next_line_color__ (true);
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158 __next_line_style__ (true);
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159 else
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160 __next_line_color__ (false);
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161 __next_line_style__ (false);
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162 endif
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163
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164 anp = get (ca, "nextplot");
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165 switch (anp)
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166 case "add"
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167 ## Default case. Doesn't require action.
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168 case "replacechildren"
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169 if (! deleteall && ca != hsave)
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170 ## preserve hsave and its parents, uncles, ...
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171 kids = allchild (ca);
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172 hkid = hsave;
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173 while (! any (hkid == kids))
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174 hkid = get (hkid, "parent");
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175 endwhile
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176 kids(kids == hkid) = [];
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177 delete (kids);
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178 else
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179 delete (get (ca, "children"));
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180 endif
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181 case "replace"
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182 if (! deleteall && ca != hsave)
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183 ## preserve hsave and its parents, uncles, ...
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184 kids = allchild (ca);
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185 hkid = hsave;
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186 while (! any (hkid == kids))
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187 hkid = get (hkid, "parent");
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188 endwhile
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189 kids(kids == hkid) = [];
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190 delete (kids);
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191 else
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192 __go_axes_init__ (ca, "replace");
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193 __request_drawnow__ ();
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194 endif
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195 ## FIXME: The code above should perform the following:
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196 ###########################
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197 ## delete (allchild (ca));
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198 ## reset (ca);
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199 ###########################
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200 ## Actually, __go_axes_init__ does both less and more.
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201 ## It doesn't really remove all children since it re-instantiates
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202 ## xlabel, ylabel, zlabel, and title text objects.
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203 ## Also it preserves font properties like fontsize.
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204 ## For the time being, in order to have axis labels and title work,
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205 ## the above code is is required.
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206 endswitch
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207
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208 if (nargout > 0)
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209 hax = ca;
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210 endif
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211
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212 endfunction
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213
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214
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215 %!test
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216 %! hf = figure ("visible", "off");
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217 %! unwind_protect
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218 %! p = plot ([0, 1]);
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219 %! hax = newplot ();
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220 %! assert (hax, gca);
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221 %! assert (isempty (get (gca, "children")));
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222 %! unwind_protect_cleanup
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223 %! close (hf);
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224 %! end_unwind_protect
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225
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226 %!test
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227 %! hf = figure ("visible", "off");
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228 %! unwind_protect
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229 %! hax = axes ();
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230 %! hold on;
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231 %! hg1 = hggroup ();
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232 %! hg2 = hggroup ("parent", hg1);
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233 %! li0 = line (1:10, 1:10);
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234 %! li1 = line (1:10, -1:-1:-10, "parent", hg1);
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235 %! li2 = line (1:10, sin (1:10), "parent", hg2);
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236 %! hold off;
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237 %! newplot (hg2);
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238 %! assert (ishandle (li0), false);
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239 %! assert (get (hax, "children"), hg1);
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240 %!
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241 %! ## kids are preserved for hggroups
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242 %! kids = get (hg1, "children");
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243 %! newplot (hg1);
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244 %! assert (get (hg1, "children"), kids);
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245 %!
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246 %! ## preserve objects
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247 %! newplot (li1);
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248 %! assert (ishandle (li1));
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249 %!
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250 %! ## kids are deleted for axes
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251 %! newplot (hax);
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252 %! assert (isempty (get (hax, "children")));
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253 %! unwind_protect_cleanup
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254 %! close (hf);
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255 %! end_unwind_protect
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diff changeset
256