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1 ## Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 2000, 2002, 2004, |
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2 ## 2005, 2006, 2007 John W. Eaton |
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3 ## |
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4 ## This file is part of Octave. |
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5 ## |
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6 ## Octave is free software; you can redistribute it and/or modify it |
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7 ## under the terms of the GNU General Public License as published by |
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8 ## the Free Software Foundation; either version 3 of the License, or (at |
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9 ## your option) any later version. |
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10 ## |
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11 ## Octave is distributed in the hope that it will be useful, but |
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12 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 ## General Public License for more details. |
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15 ## |
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16 ## You should have received a copy of the GNU General Public License |
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17 ## along with Octave; see the file COPYING. If not, see |
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18 ## <http://www.gnu.org/licenses/>. |
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19 |
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20 ## Undocumented internal function. |
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21 |
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22 ## Author: jwe |
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23 |
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24 function retval = __plt__ (caller, h, varargin) |
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25 |
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26 nargs = nargin - 2; |
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27 |
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28 if (nargs > 0) |
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29 |
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30 k = 1; |
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31 |
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32 x_set = false; |
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33 y_set = false; |
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34 property_set = false; |
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35 properties = {}; |
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36 |
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37 ## Gather arguments, decode format, gather plot strings, and plot lines. |
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38 |
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39 retval = []; |
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40 |
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41 while (nargs > 0 || x_set) |
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42 |
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43 if (nargs == 0) |
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44 ## Force the last plot when input variables run out. |
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45 next_cell = {}; |
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46 next_arg = {""}; |
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47 else |
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48 next_cell = varargin(k); |
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49 next_arg = varargin{k++}; |
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50 endif |
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51 |
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52 nargs--; |
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53 |
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54 if (ischar (next_arg) || iscellstr (next_arg)) |
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55 if (x_set) |
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56 [options, valid] = __pltopt__ (caller, next_arg, false); |
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57 if (! valid) |
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58 if (nargs == 0) |
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59 error ("%s: properties must appear followed by a value", caller); |
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60 endif |
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61 properties = [properties, [next_cell, varargin(k++)]]; |
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62 nargs--; |
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63 continue; |
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64 else |
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65 while (nargs > 0 && ischar (varargin{k})) |
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66 if (nargs < 2) |
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67 error ("%s: properties must appear followed by a value", |
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68 caller); |
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69 endif |
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70 properties = [properties, varargin(k:k+1)]; |
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71 k += 2; |
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72 nargs -= 2; |
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73 endwhile |
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74 endif |
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75 if (y_set) |
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76 tmp = __plt2__ (h, x, y, options, properties); |
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77 properties = {}; |
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78 retval = [retval; tmp]; |
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79 else |
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80 tmp = __plt1__ (h, x, options, properties); |
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81 properties = {}; |
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82 retval = [retval; tmp]; |
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83 endif |
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84 x_set = false; |
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85 y_set = false; |
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86 else |
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87 error ("plot: no data to plot"); |
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88 endif |
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89 elseif (x_set) |
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90 if (y_set) |
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91 options = __pltopt__ (caller, {""}); |
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92 tmp = __plt2__ (h, x, y, options, properties); |
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93 retval = [retval; tmp]; |
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94 x = next_arg; |
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95 y_set = false; |
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96 properties = {}; |
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97 else |
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98 y = next_arg; |
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99 y_set = true; |
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100 endif |
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101 else |
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102 x = next_arg; |
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103 x_set = true; |
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104 endif |
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105 |
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106 endwhile |
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107 |
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108 else |
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109 msg = sprintf ("%s (y)\n", caller); |
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110 msg = sprintf ("%s %s (x, y, ...)\n", msg, caller); |
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111 msg = sprintf ("%s %s (x, y, fmt, ...)", msg, caller); |
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112 msg = sprintf ("%s %s (x, y, property, value, ...)", msg, caller); |
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113 usage (msg); |
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114 endif |
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115 |
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116 endfunction |
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117 |
