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maint: Periodic merge of stable to default.
author Rik <rik@octave.org>
date Fri, 09 Oct 2015 19:28:05 -0700
parents 9fc020886ae9
children
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4197fc428c7d maint: Update copyright notices for 2015.
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1 ## Copyright (C) 2005-2015 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
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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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18
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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
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36 ## figure.
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37 ##
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38 ## @item @qcode{"replacechildren"} @tab Delete child objects whose
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39 ## HandleVisibility is set to @qcode{"on"}. Set NextPlot property to
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40 ## @qcode{"add"}. This typically clears a figure, but leaves in place hidden
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41 ## objects such as menubars. This is equivalent to @code{clf}.
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42 ##
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43 ## @item @qcode{"replace"} @tab Delete all child objects of the figure and
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44 ## reset all figure properties to their defaults. However, the following
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45 ## four properties are not reset: Position, Units, PaperPosition, PaperUnits.
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46 ## This is equivalent to @code{clf reset}.
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47 ## @end multitable
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48 ##
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49 ## @multitable @columnfractions .25 .75
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50 ## @headitem Axis NextPlot @tab Action
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51 ## @item @qcode{"add"} @tab Add new graphic objects to the current axes. This
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52 ## is equivalent to @code{hold on}.
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53 ##
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54 ## @item @qcode{"replacechildren"} @tab Delete child objects whose
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55 ## HandleVisibility is set to @qcode{"on"}, but leave axis properties
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56 ## unmodified. This typically clears a plot, but preserves special settings
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57 ## such as log scaling for axes. This is equivalent to @code{cla}.
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58 ##
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59 ## @item @qcode{"replace"} (default) @tab Delete all child objects of the
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60 ## axis and reset all axis properties to their defaults. However, the
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61 ## following properties are not reset: Position, Units. This is equivalent
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62 ## to @code{cla reset}.
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63 ## @end multitable
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64 ##
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65 ## If the optional input @var{hfig} or @var{hax} is given then prepare the
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66 ## specified figure or axes rather than the current figure and axes.
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67 ##
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68 ## The optional return value @var{hax} is a graphics handle to the created
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69 ## axes object (not figure).
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70 ##
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71 ## @strong{Caution:} Calling @code{newplot} may change the current figure and
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72 ## current axis.
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73 ## @end deftypefn
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74
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75 ## FIXME: The Matlab function takes an optional list of file handles, hsave,
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76 ## which are not deleted when the figure and axes are prepared.
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77 ## I'm sure there is a good reason for that, but coding such
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78 ## compatibility is really tricky and doesn't serve much purpose since
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79 ## newplot is nearly exclusively used by Octave's internal plotting
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80 ## functions. In Octave's case the argument is almost always null,
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81 ## or occasionally the axis handle to plot into.
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82
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83 function hax = newplot (hsave = [])
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84
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85 if (nargin > 1)
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86 print_usage ();
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87 endif
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88
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89 cf = [];
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90 ca = [];
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91
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92 if (! isempty (hsave))
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93 ## Find the first valid axes
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94 ca = ancestor (hsave, "axes", "toplevel");
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95 if (iscell (ca))
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96 ca = [ca{:}];
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97 endif
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98 ca = ca(find (ca, 1));
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99 hsave(hsave == ca) = [];
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100 ## Next, find the figure associated with any axis found
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101 if (! isempty (ca))
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102 cf = ancestor (ca, "figure", "toplevel");
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103 else
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104 cf = ancestor (hsave, "figure", "toplevel");
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105 if (iscell (cf))
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106 cf = [cf{:}];
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107 endif
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108 cf = cf(find (cf, 1));
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109 endif
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110 endif
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111
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112 if (isempty (cf))
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113 ## get current figure, or create a new one if necessary
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114 cf = gcf ();
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115 else
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116 ## switch to figure provided without causing other updates
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117 set (0, "currentfigure", cf);
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118 endif
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119
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120 fnp = get (cf, "nextplot");
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121 switch (fnp)
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122 case "add"
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123 ## Default case. Doesn't require action.
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124 case "new"
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125 ## Ordinarily, create a new figure to hold plot.
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126 ## But, if user has requested preparing a specific axis, then
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127 ## use the existing figure to hold the requested axis.
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128 if (isempty (ca))
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129 cf = figure ();
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diff changeset
130 endif
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diff changeset
131 case "replacechildren"
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132 kids = get (cf, "children");
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133 if (! isempty (ca))
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134 kids(kids == ca) = [];
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diff changeset
135 endif
08dd9458684a Overhaul __plt_get_axis_arg__ and newplot functions to avoid creating unnecessary axes.
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136 delete (kids);
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diff changeset
137 case "replace"
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138 kids = allchild (cf);
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139 if (! isempty (ca))
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diff changeset
140 kids(kids == ca) = [];
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diff changeset
141 endif
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diff changeset
142 delete (kids);
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diff changeset
143 reset (cf);
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diff changeset
144 endswitch
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diff changeset
145 set (cf, "nextplot", "add"); # Matlab compatibility
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diff changeset
146
08dd9458684a Overhaul __plt_get_axis_arg__ and newplot functions to avoid creating unnecessary axes.
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diff changeset
147 if (isempty (ca))
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148 ca = gca ();
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149 deleteall = true;
17036
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150 else
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diff changeset
151 set (cf, "currentaxes", ca);
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152 deleteall = false;
17036
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153 endif
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154
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diff changeset
155 ## FIXME: Is this necessary anymore?
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156 ## It seems like a kluge that belongs somewhere else.
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diff changeset
157 if (strcmp (get (ca, "__hold_all__"), "off"))
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158 __next_line_color__ (true);
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159 __next_line_style__ (true);
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160 else
17036
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161 __next_line_color__ (false);
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162 __next_line_style__ (false);
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diff changeset
163 endif
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diff changeset
164
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165 anp = get (ca, "nextplot");
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diff changeset
166 switch (anp)
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167 case "add"
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168 ## Default case. Doesn't require action.
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169 case "replacechildren"
17720
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170 if (! deleteall && ca != hsave)
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171 ## preserve hsave and its parents, uncles, ...
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172 kids = allchild (ca);
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173 hkid = hsave;
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diff changeset
174 while (! any (hkid == kids))
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175 hkid = get (hkid, "parent");
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diff changeset
176 endwhile
1ab8e21d9cfc Further corrections to parenting of axes (bug #39813)
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177 kids(kids == hkid) = [];
1ab8e21d9cfc Further corrections to parenting of axes (bug #39813)
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178 delete (kids);
1ab8e21d9cfc Further corrections to parenting of axes (bug #39813)
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parents: 17719
diff changeset
179 else
1ab8e21d9cfc Further corrections to parenting of axes (bug #39813)
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180 delete (get (ca, "children"));
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diff changeset
181 endif
17036
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182 case "replace"
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183 if (! deleteall && ca != hsave)
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184 ## preserve hsave and its parents, uncles, ...
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185 kids = allchild (ca);
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186 hkid = hsave;
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187 while (! any (hkid == kids))
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188 hkid = get (hkid, "parent");
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diff changeset
189 endwhile
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diff changeset
190 kids(kids == hkid) = [];
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191 delete (kids);
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diff changeset
192 else
19746
52cd69e79784 Fix legend function interaction with plotyy (bug #44246).
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diff changeset
193 if (isprop (ca, "__plotyy_axes__"))
52cd69e79784 Fix legend function interaction with plotyy (bug #44246).
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194 ## Hack for bug #44246. There is no way to reset or remove a
52cd69e79784 Fix legend function interaction with plotyy (bug #44246).
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195 ## property created with addproperty short of deleting the object.
52cd69e79784 Fix legend function interaction with plotyy (bug #44246).
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diff changeset
196 delete (ca);
52cd69e79784 Fix legend function interaction with plotyy (bug #44246).
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parents: 19731
diff changeset
197 ca = axes ();
52cd69e79784 Fix legend function interaction with plotyy (bug #44246).
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parents: 19731
diff changeset
198 else
52cd69e79784 Fix legend function interaction with plotyy (bug #44246).
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199 __go_axes_init__ (ca, "replace");
52cd69e79784 Fix legend function interaction with plotyy (bug #44246).
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200 __request_drawnow__ ();
52cd69e79784 Fix legend function interaction with plotyy (bug #44246).
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parents: 19731
diff changeset
201 endif
17719
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diff changeset
202 endif
17036
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diff changeset
203 ## FIXME: The code above should perform the following:
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204 ###########################
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205 ## delete (allchild (ca));
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206 ## reset (ca);
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diff changeset
207 ###########################
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diff changeset
208 ## Actually, __go_axes_init__ does both less and more.
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diff changeset
209 ## It doesn't really remove all children since it re-instantiates
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diff changeset
210 ## xlabel, ylabel, zlabel, and title text objects.
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diff changeset
211 ## Also it preserves font properties like fontsize.
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diff changeset
212 ## For the time being, in order to have axis labels and title work,
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diff changeset
213 ## the above code is is required.
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diff changeset
214 endswitch
08dd9458684a Overhaul __plt_get_axis_arg__ and newplot functions to avoid creating unnecessary axes.
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parents: 16076
diff changeset
215
08dd9458684a Overhaul __plt_get_axis_arg__ and newplot functions to avoid creating unnecessary axes.
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diff changeset
216 if (nargout > 0)
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diff changeset
217 hax = ca;
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diff changeset
218 endif
8252
b12a2975bf7e newplot.m: delete stray debugging code
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parents: 8228
diff changeset
219
6257
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diff changeset
220 endfunction
13204
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parents: 11589
diff changeset
221
14363
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
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diff changeset
222
13204
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diff changeset
223 %!test
be7bfd59300a Add tests for scripts/plot
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diff changeset
224 %! hf = figure ("visible", "off");
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diff changeset
225 %! unwind_protect
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226 %! p = plot ([0, 1]);
17036
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227 %! hax = newplot ();
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228 %! assert (hax, gca);
13204
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diff changeset
229 %! assert (isempty (get (gca, "children")));
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diff changeset
230 %! unwind_protect_cleanup
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diff changeset
231 %! close (hf);
be7bfd59300a Add tests for scripts/plot
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diff changeset
232 %! end_unwind_protect
14363
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diff changeset
233
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diff changeset
234 %!test
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diff changeset
235 %! hf = figure ("visible", "off");
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diff changeset
236 %! unwind_protect
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diff changeset
237 %! hax = axes ();
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diff changeset
238 %! hold on;
ed9a21a90221 Fix incorrect parenting of axes and hggroups (bug #39813)
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diff changeset
239 %! hg1 = hggroup ();
ed9a21a90221 Fix incorrect parenting of axes and hggroups (bug #39813)
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diff changeset
240 %! hg2 = hggroup ("parent", hg1);
ed9a21a90221 Fix incorrect parenting of axes and hggroups (bug #39813)
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diff changeset
241 %! li0 = line (1:10, 1:10);
ed9a21a90221 Fix incorrect parenting of axes and hggroups (bug #39813)
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diff changeset
242 %! li1 = line (1:10, -1:-1:-10, "parent", hg1);
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diff changeset
243 %! li2 = line (1:10, sin (1:10), "parent", hg2);
ed9a21a90221 Fix incorrect parenting of axes and hggroups (bug #39813)
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diff changeset
244 %! hold off;
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diff changeset
245 %! newplot (hg2);
ed9a21a90221 Fix incorrect parenting of axes and hggroups (bug #39813)
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diff changeset
246 %! assert (ishandle (li0), false);
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diff changeset
247 %! assert (get (hax, "children"), hg1);
19627
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diff changeset
248 %!
17719
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diff changeset
249 %! ## kids are preserved for hggroups
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diff changeset
250 %! kids = get (hg1, "children");
19627
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diff changeset
251 %! newplot (hg1);
17720
1ab8e21d9cfc Further corrections to parenting of axes (bug #39813)
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diff changeset
252 %! assert (get (hg1, "children"), kids);
19627
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diff changeset
253 %!
17719
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diff changeset
254 %! ## preserve objects
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diff changeset
255 %! newplot (li1);
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diff changeset
256 %! assert (ishandle (li1));
19627
446c46af4b42 strip trailing whitespace from most source files
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diff changeset
257 %!
17719
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diff changeset
258 %! ## kids are deleted for axes
19627
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diff changeset
259 %! newplot (hax);
17719
ed9a21a90221 Fix incorrect parenting of axes and hggroups (bug #39813)
Pantxo Diribarne <pantxo.diribarne@gmail.com>
parents: 17572
diff changeset
260 %! assert (isempty (get (hax, "children")));
ed9a21a90221 Fix incorrect parenting of axes and hggroups (bug #39813)
Pantxo Diribarne <pantxo.diribarne@gmail.com>
parents: 17572
diff changeset
261 %! unwind_protect_cleanup
ed9a21a90221 Fix incorrect parenting of axes and hggroups (bug #39813)
Pantxo Diribarne <pantxo.diribarne@gmail.com>
parents: 17572
diff changeset
262 %! close (hf);
ed9a21a90221 Fix incorrect parenting of axes and hggroups (bug #39813)
Pantxo Diribarne <pantxo.diribarne@gmail.com>
parents: 17572
diff changeset
263 %! end_unwind_protect
ed9a21a90221 Fix incorrect parenting of axes and hggroups (bug #39813)
Pantxo Diribarne <pantxo.diribarne@gmail.com>
parents: 17572
diff changeset
264