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1 ## Copyright (C) 1996, 1997 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 ## Undocumented internal function. |
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20 |
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21 ## Author: jwe |
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22 |
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23 function retval = __plt__ (caller, h, varargin) |
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24 |
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25 nargs = nargin - 2; |
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26 |
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27 if (nargs > 0) |
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28 |
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29 k = 1; |
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30 |
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31 x_set = false; |
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32 y_set = false; |
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33 property_set = false; |
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34 properties = {}; |
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35 |
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36 ## Gather arguments, decode format, gather plot strings, and plot lines. |
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37 |
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38 retval = []; |
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39 |
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40 while (nargs > 0 || x_set) |
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41 |
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42 if (nargs == 0) |
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43 ## Force the last plot when input variables run out. |
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44 next_cell = {}; |
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45 next_arg = {""}; |
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46 else |
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47 next_cell = varargin(k); |
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48 next_arg = varargin{k++}; |
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49 endif |
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50 |
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51 nargs--; |
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52 |
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53 if (ischar (next_arg) || iscellstr (next_arg)) |
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54 if (x_set) |
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55 [options, valid] = __pltopt__ (caller, next_arg, false); |
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56 if (! valid) |
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57 if (nargs == 0) |
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58 error ("%s: properties must appear followed by a value", caller); |
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59 endif |
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60 properties = [properties, [next_cell, varargin(k++)]]; |
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61 nargs--; |
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62 continue; |
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63 else |
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64 while (nargs > 0 && ischar (varargin{k})) |
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65 if (nargs < 2) |
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66 error ("%s: properties must appear followed by a value", |
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67 caller); |
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68 endif |
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69 properties = [properties, varargin(k:k+1)]; |
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70 k += 2; |
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71 nargs -= 2; |
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72 endwhile |
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73 endif |
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74 if (y_set) |
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75 tmp = __plt2__ (h, x, y, options, properties); |
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76 properties = {}; |
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77 retval = [retval; tmp]; |
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78 else |
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79 tmp = __plt1__ (h, x, options, properties); |
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80 properties = {}; |
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81 retval = [retval; tmp]; |
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82 endif |
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83 x_set = false; |
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84 y_set = false; |
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85 else |
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86 error ("plot: no data to plot"); |
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87 endif |
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88 elseif (x_set) |
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89 if (y_set) |
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90 options = __pltopt__ (caller, {""}); |
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91 tmp = __plt2__ (h, x, y, options, properties); |
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92 retval = [retval; tmp]; |
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93 x = next_arg; |
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94 y_set = false; |
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95 properties = {}; |
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96 else |
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97 y = next_arg; |
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98 y_set = true; |
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99 endif |
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100 else |
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101 x = next_arg; |
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102 x_set = true; |
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103 endif |
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104 |
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105 endwhile |
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106 |
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107 else |
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108 msg = sprintf ("%s (y)\n", caller); |
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109 msg = sprintf ("%s %s (x, y, ...)\n", msg, caller); |
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110 msg = sprintf ("%s %s (x, y, fmt, ...)", msg, caller); |
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111 msg = sprintf ("%s %s (x, y, property, value, ...)", msg, caller); |
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112 usage (msg); |
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113 endif |
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114 |
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115 endfunction |
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116 |
