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annotate scripts/plot/waitbar.m @ 13822:38e3bfc4e076

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provide default message for waitbar * waitabar.m: If no message is supplied for a new waitbar object, set messge to "Please wait...".
author John W. Eaton <jwe@octave.org>
date Fri, 04 Nov 2011 16:40:07 -0400
parents 4d1927edf194
children 2e4252228f73
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1 ## Copyright (C) 2011 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} {@var{h} =} waitbar (@var{frac})
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21 ## @deftypefnx {Function File} {@var{h} =} waitbar (@var{frac}, @var{msg})
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22 ## @deftypefnx {Function File} {@var{h} =} waitbar (@dots{}, "FigureProperty", "Value", @dots{})
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23 ## @deftypefnx {Function File} {} waitbar (@var{frac})
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24 ## @deftypefnx {Function File} {} waitbar (@var{frac}, @var{msg})
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25 ## @deftypefnx {Function File} {} waitbar (@var{frac}, @var{hwbar})
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26 ## @deftypefnx {Function File} {} waitbar (@var{frac}, @var{hwbar}, @var{msg})
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27 ## Return a handle @var{h} to a new waitbar object. The waitbar is
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28 ## filled to fraction @var{frac} which must be in the range [0, 1]. The
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29 ## optional message @var{msg} is centered and displayed above the waitbar.
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30 ## The appearance of the waitbar figure window can be configured by passing
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31 ## property/value pairs to the function.
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32 ##
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33 ## If no output handle is requested, and there is an existing waitbar, then
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34 ## the current waitbar is updated with new @var{frac} and optional @var{msg}
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35 ## values. If there are multiple outstanding waitbars they can be updated
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36 ## individually by passing the handle @var{hwbar} of the specific waitbar to
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37 ## modify.
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38 ## @end deftypefn
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39
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40 ## Author: jwe
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41
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42 function retval = waitbar (varargin)
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43
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44 persistent curr_waitbar;
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45
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46 if (nargin < 1)
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47 print_usage ();
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48 endif
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49
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50 frac = varargin{1};
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51 varargin(1) = [];
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52
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53 if (! (isnumeric (frac) && isscalar (frac) && frac >= 0 && frac <= 1))
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54 error ("waitbar: FRAC must be between 0 and 1");
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55 endif
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56
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57 ## Use existing waitbar if it still points to a valid graphics handle.
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58 if (nargin == 1 && ishandle (curr_waitbar))
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59 h = curr_waitbar;
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60 else
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61 h = false;
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62 endif
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63
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64 if (! isempty (varargin) && isnumeric (varargin{1}))
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65 if (! ishandle (varargin{1}))
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66 error ("waitbar: H must be a handle to a waitbar object");
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67 else
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68 h = varargin{1};
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69 varargin(1) = [];
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70 if (! isfigure (h) || ! strcmp (get (h, "tag"), "waitbar"))
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71 error ("waitbar: H must be a handle to a waitbar object");
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72 endif
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73 endif
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74 endif
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75
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76 msg = false;
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77
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78 if (! isempty (varargin))
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79 msg = varargin{1};
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80 varargin(1) = [];
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81 if (! ischar (msg))
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82 error ("waitbar: MSG must be a character string");
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83 endif
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84 endif
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85
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86 if (rem (numel (varargin), 2) != 0)
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87 error ("waitbar: invalid number of property-value pairs");
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88 endif
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89
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90 if (h)
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91 p = findobj (h, "type", "patch");
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92 set (p, "xdata", [0; frac; frac; 0]);
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93 ax = findobj (h, "type", "axes");
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94 if (ischar (msg))
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95 th = get (ax, "title");
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96 curr_msg = get (th, "string");
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97 if (! strcmp (msg, curr_msg))
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98 set (th, "string", msg);
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99 endif
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100 endif
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101 else
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102 h = __go_figure__ (NaN, "position", [250, 500, 400, 100],
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103 "numbertitle", "off",
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104 "toolbar", "none", "menubar", "none",
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105 "integerhandle", "off",
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106 "handlevisibility", "callback",
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107 "tag", "waitbar",
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108 varargin{:});
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109
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110 ax = axes ("parent", h, "xtick", [], "ytick", [],
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111 "xlim", [0, 1], "ylim", [0, 1],
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112 "xlimmode", "manual", "ylimmode", "manual",
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113 "position", [0.1, 0.3, 0.8, 0.2]);
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114
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115 patch (ax, [0; frac; frac; 0], [0; 0; 1; 1], [0, 0.35, 0.75]);
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116
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117 if (! ischar (msg))
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118 msg = "Please wait...";
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119 endif
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120 title (ax, msg);
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121 endif
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122
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123 drawnow ();
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124
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125 if (nargout > 0)
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126 retval = h;
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127 endif
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128
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129 ## If there were no errors, update current waitbar.
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130 curr_waitbar = h;
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131
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132 endfunction
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133
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134
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135 %!demo
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136 %! h = waitbar (0, "0.00%");
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137 %! for i = 0:0.01:1
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138 %! waitbar (i, h, sprintf ("%.2f%%", 100*i));
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139 %! endfor
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140 %! close (h);
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141
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142 %!demo
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143 %! h = waitbar (0, "please wait...");
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144 %! for i = 0:0.01:0.6
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145 %! waitbar (i);
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146 %! endfor
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147 %! i = 0.3
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148 %! waitbar (i, h, "don't you hate taking a step backward?")
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149 %! pause (0.5)
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150 %! for i = i:0.005:0.7
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151 %! waitbar (i, h);
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152 %! endfor
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153 %! waitbar (i, h, "or stalling?")
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154 %! pause (1)
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155 %! for i = i:0.003:0.8
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156 %! waitbar (i, h, "just a little longer now")
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157 %! endfor
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158 %! for i = i:0.001:1
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159 %! waitbar (i, h, "please don't be impatient")
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160 %! endfor
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161 %! close (h);
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162
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163 %!demo
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164 %! h1 = waitbar (0, "Waitbar #1");
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165 %! h2 = waitbar (0, "Waitbar #2");
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166 %! h2pos = get (h2, "position");
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167 %! h2pos(1) += h2pos(3) + 50;
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168 %! set (h2, "position", h2pos);
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169 %! pause (0.5)
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170 %! for i = 1:4
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171 %! waitbar (i/4, h1);
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172 %! pause (0.5);
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173 %! waitbar (i/4, h2);
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174 %! pause (0.5);
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175 %! endfor
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176 %! pause (0.5)
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177 %! close (h1);
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178 %! close (h2);
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179
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180 %% Test input validation
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181 %!error <FRAC must be between 0 and 1> waitbar (-0.5)
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182 %!error <FRAC must be between 0 and 1> waitbar (1.5)
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183 %!error <MSG must be a character string> waitbar (0.5, struct ())
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184 %!error <invalid number of property-value pairs> waitbar (0.5, "msg", "Name")
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185