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allow waitbar message to be a cellstr object * waitbar.m: Allow message to be cellstr.
author John W. Eaton <jwe@octave.org>
date Tue, 08 Nov 2011 19:59:37 -0500
parents 2e4252228f73
children 6e9fee72a01c
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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{hwbar})
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25 ## @deftypefnx {Function File} {} waitbar (@var{frac}, @var{hwbar}, @var{msg})
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26 ## Return a handle @var{h} to a new waitbar object. The waitbar is
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27 ## filled to fraction @var{frac} which must be in the range [0, 1]. The
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28 ## optional message @var{msg} is centered and displayed above the waitbar.
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29 ## The appearance of the waitbar figure window can be configured by passing
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30 ## property/value pairs to the function.
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31 ##
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32 ## When called with a single input the current waitbar, if it exists, is
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33 ## updated to the new value @var{frac}. If there are multiple outstanding
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34 ## waitbars they can be updated individually by passing the handle @var{hwbar}
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35 ## of the specific waitbar to modify.
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36 ## @end deftypefn
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37
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38 ## Author: jwe
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39
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40 function retval = waitbar (varargin)
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41
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42 persistent curr_waitbar;
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43
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44 if (nargin < 1)
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45 print_usage ();
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46 endif
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47
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48 frac = varargin{1};
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49 varargin(1) = [];
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50
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51 if (! (isnumeric (frac) && isscalar (frac) && frac >= 0 && frac <= 1))
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52 error ("waitbar: FRAC must be between 0 and 1");
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53 endif
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54
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55 ## Use existing waitbar if it still points to a valid graphics handle.
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56 if (nargin == 1 && ishandle (curr_waitbar))
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57 h = curr_waitbar;
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58 else
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59 h = false;
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60 endif
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61
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62 if (! isempty (varargin) && isnumeric (varargin{1}))
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63 if (! ishandle (varargin{1}))
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64 error ("waitbar: H must be a handle to a waitbar object");
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65 else
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66 h = varargin{1};
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67 varargin(1) = [];
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68 if (! isfigure (h) || ! strcmp (get (h, "tag"), "waitbar"))
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69 error ("waitbar: H must be a handle to a waitbar object");
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70 endif
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71 endif
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72 endif
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73
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74 msg = false;
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75
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76 if (! isempty (varargin))
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77 msg = varargin{1};
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78 varargin(1) = [];
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79 if (! (ischar (msg) || iscellstr (msg)))
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80 error ("waitbar: MSG must be a character string or cell array of strings");
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81 endif
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82 endif
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83
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84 if (rem (numel (varargin), 2) != 0)
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85 error ("waitbar: invalid number of property-value pairs");
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86 endif
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87
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88 if (h)
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89 p = findobj (h, "type", "patch");
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90 set (p, "xdata", [0; frac; frac; 0]);
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91 ax = findobj (h, "type", "axes");
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92 if (ischar (msg) || iscellstr (msg))
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93 th = get (ax, "title");
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94 curr_msg = get (th, "string");
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95 cmp = strcmp (msg, curr_msg);
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96 if (all (cmp(:)))
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97 set (th, "string", msg);
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98 endif
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99 endif
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100 else
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101 h = __go_figure__ (NaN, "position", [250, 500, 400, 100],
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102 "numbertitle", "off",
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103 "toolbar", "none", "menubar", "none",
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104 "integerhandle", "off",
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105 "handlevisibility", "callback",
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106 "tag", "waitbar",
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107 varargin{:});
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108
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109 ax = axes ("parent", h, "xtick", [], "ytick", [],
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110 "xlim", [0, 1], "ylim", [0, 1],
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111 "xlimmode", "manual", "ylimmode", "manual",
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112 "position", [0.1, 0.3, 0.8, 0.2]);
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113
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114 patch (ax, [0; frac; frac; 0], [0; 0; 1; 1], [0, 0.35, 0.75]);
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115
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116 if (! (ischar (msg) || iscellstr (msg)))
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117 msg = "Please wait...";
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118 endif
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119 title (ax, msg);
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120 endif
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121
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122 drawnow ();
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123
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124 if (nargout > 0)
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125 retval = h;
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126 endif
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127
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128 ## If there were no errors, update current waitbar.
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129 curr_waitbar = h;
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130
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131 endfunction
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132
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133
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134 %!demo
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135 %! h = waitbar (0, "0.00%");
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136 %! for i = 0:0.01:1
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137 %! waitbar (i, h, sprintf ("%.2f%%", 100*i));
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138 %! endfor
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139 %! close (h);
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140
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141 %!demo
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142 %! h = waitbar (0, "please wait...");
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143 %! for i = 0:0.01:0.6
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144 %! waitbar (i);
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145 %! endfor
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146 %! i = 0.3
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147 %! waitbar (i, h, "don't you hate taking a step backward?")
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148 %! pause (0.5);
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149 %! for i = i:0.005:0.7
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150 %! waitbar (i, h);
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151 %! endfor
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152 %! waitbar (i, h, "or stalling?")
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153 %! pause (1);
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154 %! for i = i:0.003:0.8
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155 %! waitbar (i, h, "just a little longer now")
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156 %! endfor
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157 %! for i = i:0.001:1
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158 %! waitbar (i, h, "please don't be impatient")
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159 %! endfor
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160 %! close (h);
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161
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162 %!demo
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163 %! h1 = waitbar (0, "Waitbar #1");
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164 %! h2 = waitbar (0, "Waitbar #2");
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165 %! h2pos = get (h2, "position");
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166 %! h2pos(1) += h2pos(3) + 50;
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167 %! set (h2, "position", h2pos);
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168 %! pause (0.5);
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169 %! for i = 1:4
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170 %! waitbar (i/4, h1);
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171 %! pause (0.5);
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172 %! waitbar (i/4, h2);
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173 %! pause (0.5);
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174 %! endfor
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175 %! pause (0.5);
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176 %! close (h1);
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177 %! close (h2);
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178
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179 %% Test input validation
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180 %!error <FRAC must be between 0 and 1> waitbar (-0.5)
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181 %!error <FRAC must be between 0 and 1> waitbar (1.5)
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182 %!error <MSG must be a character string> waitbar (0.5, struct ())
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183 %!error <invalid number of property-value pairs> waitbar (0.5, "msg", "Name")
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184