Annotation of loncom/xml/lonplot.pm, revision 1.120

1.1       matthew     1: # The LearningOnline Network with CAPA
                      2: # Dynamic plot
                      3: #
1.120   ! albertel    4: # $Id: lonplot.pm,v 1.119 2007/06/19 01:15:24 albertel Exp $
1.1       matthew     5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
1.35      matthew    28: 
1.1       matthew    29: package Apache::lonplot;
1.10      matthew    30: 
1.1       matthew    31: use strict;
1.89      matthew    32: use warnings FATAL=>'all';
                     33: no warnings 'uninitialized';
1.10      matthew    34: use Apache::File;
1.1       matthew    35: use Apache::response;
1.2       matthew    36: use Apache::lonxml;
1.20      matthew    37: use Apache::edit;
1.106     albertel   38: use Apache::lonnet;
1.113     www        39: use lib '/home/httpd/lib/perl/';
                     40: use LONCAPA;
                     41:  
1.10      matthew    42: 
1.97      matthew    43: use vars qw/$weboutputformat $versionstring/;
                     44: 
1.109     foxr       45: 
1.108     foxr       46: 
1.33      harris41   47: BEGIN {
1.97      matthew    48:     &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
                     49:     #
                     50:     # Determine the version of GNUPLOT
                     51:     $weboutputformat = 'gif';
1.99      matthew    52:     $versionstring = `gnuplot --version 2>/dev/null`;
1.97      matthew    53:     if ($versionstring =~ /^gnuplot 4/) {
                     54:         $weboutputformat = 'png';
                     55:     }
1.108     foxr       56:     
                     57: }
                     58: 
1.1       matthew    59: 
1.10      matthew    60: ## 
                     61: ## Description of data structures:
                     62: ##
                     63: ##  %plot       %key    %axis
                     64: ## --------------------------
                     65: ##  height      title   color
                     66: ##  width       box     xmin
                     67: ##  bgcolor     pos     xmax
                     68: ##  fgcolor             ymin
                     69: ##  transparent         ymax
                     70: ##  grid
                     71: ##  border
                     72: ##  font
1.19      matthew    73: ##  align
1.10      matthew    74: ##
                     75: ##  @labels: $labels[$i] = \%label
                     76: ##           %label: text, xpos, ypos, justify
1.14      matthew    77: ##
1.10      matthew    78: ##  @curves: $curves[$i] = \%curve
1.14      matthew    79: ##           %curve: name, linestyle, ( function | data )
1.10      matthew    80: ##
                     81: ##  $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
                     82: ##                            [y1,y2,y3,y4] ]
                     83: ##
1.21      matthew    84: 
                     85: ###################################################################
                     86: ##                                                               ##
                     87: ##        Tests used in checking the validitity of input         ##
                     88: ##                                                               ##
                     89: ###################################################################
1.29      matthew    90: 
1.32      matthew    91: my $max_str_len = 50;    # if a label, title, xlabel, or ylabel text
                     92:                          # is longer than this, it will be truncated.
                     93: 
1.29      matthew    94: my %linestyles = 
                     95:     (
                     96:      lines          => 2,     # Maybe this will be used in the future
                     97:      linespoints    => 2,     # to check on whether or not they have 
                     98:      dots	    => 2,     # supplied enough <data></data> fields
                     99:      points         => 2,     # to use the given line style.  But for
                    100:      steps	    => 2,     # now there are more important things 
                    101:      fsteps	    => 2,     # for me to deal with.
                    102:      histeps        => 2,
1.34      matthew   103:      errorbars	    => 3,
                    104:      xerrorbars	    => [3,4],
                    105:      yerrorbars	    => [3,4],
1.35      matthew   106:      xyerrorbars    => [4,6],
1.34      matthew   107:      boxes          => 3,
1.110     albertel  108:      filledcurves   => 2,
1.35      matthew   109:      vector	    => 4
1.29      matthew   110:     );		    
                    111: 
1.11      matthew   112: my $int_test       = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
1.19      matthew   113: my $real_test      = 
                    114:     sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
1.62      matthew   115: my $pos_real_test  =
                    116:     sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/};
1.79      matthew   117: my $color_test     = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-fA-F]{6}$/};
1.1       matthew   118: my $onoff_test     = sub {$_[0]=~/^(on|off)$/};
1.15      matthew   119: my $key_pos_test   = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
1.119     albertel  120: my $sml_test       = sub {$_[0]=~/^(\d+|small|medium|large)$/};
1.29      matthew   121: my $linestyle_test = sub {exists($linestyles{$_[0]})};
1.67      matthew   122: my $words_test     = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*\(\)-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/};
1.21      matthew   123: 
                    124: ###################################################################
                    125: ##                                                               ##
                    126: ##                      Attribute metadata                       ##
                    127: ##                                                               ##
                    128: ###################################################################
1.47      matthew   129: my @gnuplot_edit_order = 
1.120   ! albertel  130:     qw/alttag bgcolor fgcolor height width fontface font transparent grid samples 
1.115     albertel  131:     border align texwidth texfont plotcolor plottype gridtype lmargin rmargin
                    132:     tmargin bmargin major_ticscale minor_ticscale boxwidth gridlayer fillstyle
1.110     albertel  133:     pattern solid/;
1.101     matthew   134: 
1.105     matthew   135: my $margin_choices = ['default',0..20];
1.48      matthew   136: 
1.47      matthew   137: my %gnuplot_defaults = 
1.1       matthew   138:     (
1.64      matthew   139:      alttag       => {
                    140: 	 default     => 'dynamically generated plot',
                    141: 	 test        => $words_test,
1.120   ! albertel  142: 	 description => 'Brief description of the plot',
1.64      matthew   143:       	 edit_type   => 'entry',
                    144: 	 size        => '40'
                    145: 	 },
1.20      matthew   146:      height       => {
1.65      matthew   147: 	 default     => 300,
1.20      matthew   148: 	 test        => $int_test,
1.120   ! albertel  149: 	 description => 'Height of image (pixels)',
1.38      matthew   150:       	 edit_type   => 'entry',
                    151: 	 size        => '10'
1.20      matthew   152: 	 },
                    153:      width        => {
1.65      matthew   154: 	 default     => 400,
1.20      matthew   155: 	 test        => $int_test,
1.120   ! albertel  156: 	 description => 'Width of image (pixels)',
1.38      matthew   157: 	 edit_type   => 'entry',
                    158: 	 size        => '10'
1.20      matthew   159: 	 },
                    160:      bgcolor      => {
                    161: 	 default     => 'xffffff',
                    162: 	 test        => $color_test, 
1.120   ! albertel  163: 	 description => 'Background color of image (xffffff)',
1.38      matthew   164: 	 edit_type   => 'entry',
                    165: 	 size        => '10'
1.20      matthew   166: 	 },
                    167:      fgcolor      => {
                    168: 	 default     => 'x000000',
                    169: 	 test        => $color_test,
1.120   ! albertel  170: 	 description => 'Foreground color of image (x000000)',
1.38      matthew   171: 	 edit_type   => 'entry',
                    172: 	 size        => '10'
1.20      matthew   173: 	 },
                    174:      transparent  => {
                    175: 	 default     => 'off',
                    176: 	 test        => $onoff_test, 
1.34      matthew   177: 	 description => 'Transparent image',
1.45      matthew   178: 	 edit_type   => 'onoff'
1.20      matthew   179: 	 },
                    180:      grid         => {
1.65      matthew   181: 	 default     => 'on',
1.20      matthew   182: 	 test        => $onoff_test, 
1.34      matthew   183: 	 description => 'Display grid',
1.45      matthew   184: 	 edit_type   => 'onoff'
1.20      matthew   185: 	 },
1.110     albertel  186:      gridlayer    => {
                    187: 	 default     => 'off',
                    188: 	 test        => $onoff_test, 
                    189: 	 description => 'Display grid front layer over filled boxes or filled curves',
                    190: 	 edit_type   => 'onoff'
                    191: 	 },
                    192:      box_border   => {
                    193: 	 default     => 'noborder',
                    194: 	 test        => sub {$_[0]=~/^(noborder|border)$/},
                    195: 	 description => 'Draw border for boxes',
                    196: 	 edit_type   => 'choice',
                    197: 	 choices     => ['border','noborder']
                    198: 	 },
1.20      matthew   199:      border       => {
                    200: 	 default     => 'on',
                    201: 	 test        => $onoff_test, 
1.34      matthew   202: 	 description => 'Draw border around plot',
1.45      matthew   203: 	 edit_type   => 'onoff'
1.20      matthew   204: 	 },
                    205:      font         => {
1.119     albertel  206: 	 default     => '9',
1.20      matthew   207: 	 test        => $sml_test,
                    208: 	 description => 'Size of font to use',
                    209: 	 edit_type   => 'choice',
1.119     albertel  210: 	 choices     => [['5','5 (small)'],'7',['9','9 (medium)'],'10','12',['15','15 (large)']]
1.20      matthew   211: 	 },
1.120   ! albertel  212:      fontface     => {
        !           213:         default     => 'sans-serif',
        !           214:         test        => sub {$_[0]=~/^(sans-serif|serif|classic)$/},
        !           215:         description => 'Type of font to use',
        !           216:         edit_type   => 'choice',
        !           217:         choices     => ['sans-serif','serif', 'classic']
        !           218:         },
1.110     albertel  219:      samples      => {
1.77      matthew   220: 	 default     => '100',
                    221: 	 test        => $int_test,
                    222: 	 description => 'Number of samples for non-data plots',
                    223: 	 edit_type   => 'choice',
                    224: 	 choices     => ['100','200','500','1000','2000','5000']
                    225: 	 },
1.20      matthew   226:      align        => {
1.116     albertel  227: 	 default     => 'middle',
                    228: 	 test        => sub {$_[0]=~/^(left|right|middle|center)$/},
1.120   ! albertel  229: 	 description => 'Alignment for image in HTML',
1.20      matthew   230: 	 edit_type   => 'choice',
1.116     albertel  231: 	 choices     => ['left','right','middle']
1.82      matthew   232: 	 },
                    233:      texwidth     => {
                    234:          default     => '93',
                    235:          test        => $int_test,
                    236:          description => 'Width of plot when printed (mm)',
                    237:          edit_type   => 'entry',
                    238:          size        => '5'
                    239:          },
1.110     albertel  240:      texfont      => {
1.92      matthew   241:          default     => '22',
                    242:          test        => $int_test,
                    243:          description => 'Font size to use in TeX output (pts):',
                    244:          edit_type   => 'choice',
1.96      matthew   245:          choices     => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
1.92      matthew   246:          },
1.110     albertel  247:      plotcolor    => {
1.105     matthew   248:          default     => 'monochrome',
                    249:          test        => sub {$_[0]=~/^(monochrome|color|colour)$/},
                    250:          description => 'Color setting for printing:',
                    251:          edit_type   => 'choice',
                    252:          choices     => [qw/monochrome color colour/],
                    253:          },
1.110     albertel  254:      pattern      => {
                    255: 	 default     => '',
                    256: 	 test        => $int_test,
1.120   ! albertel  257: 	 description => 'Pattern value for boxes:',
1.110     albertel  258: 	 edit_type   => 'choice',
                    259:          choices     => [0,1,2,3,4,5,6]
                    260:          },
                    261:      solid        => {
                    262:          default     => 0,
                    263:          test        => $real_test,
                    264:          description => 'The density of fill style for boxes',
                    265:          edit_type   => 'entry',
                    266:          size        => '5'
                    267:          },
                    268:      fillstyle    => {
                    269: 	 default     => 'empty',
                    270: 	 test        => sub {$_[0]=~/^(empty|solid|pattern)$/},
                    271: 	 description => 'Filled style for boxes:',
                    272: 	 edit_type   => 'choice',
                    273:          choices     => ['empty','solid','pattern']
                    274:          },
                    275:      plottype     => {
1.87      matthew   276: 	 default     => 'Cartesian',
                    277: 	 test        => sub {$_[0]=~/^(Polar|Cartesian)$/},
                    278: 	 description => 'Plot type:',
                    279: 	 edit_type   => 'choice',
1.94      matthew   280:          choices     => ['Cartesian','Polar']
1.87      matthew   281:          },
1.115     albertel  282:      gridtype     => {
                    283: 	 default     => 'Cartesian',
1.118     albertel  284: 	 test        => sub {$_[0]=~/^(Polar|Cartesian|Linear-Log|Log-Linear|Log-Log)$/},
1.115     albertel  285: 	 description => 'Grid type:',
                    286: 	 edit_type   => 'choice',
1.118     albertel  287:          choices     => ['Cartesian','Polar','Linear-Log','Log-Linear','Log-Log']
1.115     albertel  288:          },
1.110     albertel  289:      lmargin      => {
1.101     matthew   290: 	 default     => 'default',
                    291: 	 test        => sub {$_[0]=~/^(default|\d+)$/},
                    292: 	 description => 'Left margin width (pts):',
                    293: 	 edit_type   => 'choice',
                    294:          choices     => $margin_choices,
                    295:          },
1.110     albertel  296:      rmargin      => {
1.101     matthew   297: 	 default     => 'default',
                    298: 	 test        => sub {$_[0]=~/^(default|\d+)$/},
                    299: 	 description => 'Right margin width (pts):',
                    300: 	 edit_type   => 'choice',
                    301:          choices     => $margin_choices,
                    302:          },
1.110     albertel  303:      tmargin      => {
1.101     matthew   304: 	 default     => 'default',
                    305: 	 test        => sub {$_[0]=~/^(default|\d+)$/},
                    306: 	 description => 'Top margin width (pts):',
                    307: 	 edit_type   => 'choice',
                    308:          choices     => $margin_choices,
                    309:          },
1.110     albertel  310:      bmargin      => {
1.101     matthew   311: 	 default     => 'default',
                    312: 	 test        => sub {$_[0]=~/^(default|\d+)$/},
1.104     www       313: 	 description => 'Bottom margin width (pts):',
1.101     matthew   314: 	 edit_type   => 'choice',
                    315:          choices     => $margin_choices,
                    316:          },
1.110     albertel  317:      boxwidth     => {
                    318: 	 default     => '',
                    319: 	 test        => $real_test, 
1.120   ! albertel  320: 	 description => 'Width of boxes, default is auto',
1.110     albertel  321: 	 edit_type   => 'entry',
                    322:          size        => '5'
                    323:          },
1.101     matthew   324:      major_ticscale  => {
                    325:          default     => '1',
                    326:          test        => $real_test,
                    327:          description => 'Size of major tic marks (plot coordinates)',
                    328:          edit_type   => 'entry',
                    329:          size        => '5'
                    330:          },
                    331:      minor_ticscale  => {
                    332:          default     => '0.5',
                    333:          test        => $real_test,
                    334:          description => 'Size of minor tic mark (plot coordinates)',
                    335:          edit_type   => 'entry',
                    336:          size        => '5'
                    337:          },
1.1       matthew   338:      );
                    339: 
                    340: my %key_defaults = 
                    341:     (
1.20      matthew   342:      title => { 
                    343: 	 default => '',
                    344: 	 test => $words_test,
                    345: 	 description => 'Title of key',
1.38      matthew   346: 	 edit_type   => 'entry',
                    347: 	 size        => '40'
1.20      matthew   348: 	 },
                    349:      box   => { 
                    350: 	 default => 'off',
                    351: 	 test => $onoff_test,
                    352: 	 description => 'Draw a box around the key?',
1.45      matthew   353: 	 edit_type   => 'onoff'
1.20      matthew   354: 	 },
                    355:      pos   => { 
                    356: 	 default => 'top right', 
                    357: 	 test => $key_pos_test, 
1.120   ! albertel  358: 	 description => 'Position of the key on the plot',
1.20      matthew   359: 	 edit_type   => 'choice',
                    360: 	 choices     => ['top left','top right','bottom left','bottom right',
                    361: 			 'outside','below']
                    362: 	 }
1.1       matthew   363:      );
                    364: 
                    365: my %label_defaults = 
                    366:     (
1.20      matthew   367:      xpos    => {
                    368: 	 default => 0,
                    369: 	 test => $real_test,
1.120   ! albertel  370: 	 description => 'X position of label (graph coordinates)',
1.38      matthew   371: 	 edit_type   => 'entry',
                    372: 	 size        => '10'
1.20      matthew   373: 	 },
                    374:      ypos    => {
                    375: 	 default => 0, 
                    376: 	 test => $real_test,
1.120   ! albertel  377: 	 description => 'Y position of label (graph coordinates)',
1.38      matthew   378: 	 edit_type   => 'entry',
                    379: 	 size        => '10'
1.20      matthew   380: 	 },
                    381:      justify => {
                    382: 	 default => 'left',    
                    383: 	 test => sub {$_[0]=~/^(left|right|center)$/},
                    384: 	 description => 'justification of the label text on the plot',
                    385: 	 edit_type   => 'choice',
                    386: 	 choices     => ['left','right','center']
                    387:      }
1.1       matthew   388:      );
                    389: 
1.89      matthew   390: my @tic_edit_order = ('location','mirror','start','increment','end',
                    391:                       'minorfreq');
1.45      matthew   392: my %tic_defaults =
                    393:     (
                    394:      location => {
                    395: 	 default => 'border', 
                    396: 	 test => sub {$_[0]=~/^(border|axis)$/},
1.90      matthew   397: 	 description => 'Location of major tic marks',
1.45      matthew   398: 	 edit_type   => 'choice',
                    399: 	 choices     => ['border','axis']
                    400: 	 },
                    401:      mirror => {
                    402: 	 default => 'on', 
                    403: 	 test => $onoff_test,
1.120   ! albertel  404: 	 description => 'Mirror tics on opposite axis?',
1.45      matthew   405: 	 edit_type   => 'onoff'
                    406: 	 },
                    407:      start => {
                    408: 	 default => '-10.0',
                    409: 	 test => $real_test,
1.90      matthew   410: 	 description => 'Start major tics at',
1.45      matthew   411: 	 edit_type   => 'entry',
                    412: 	 size        => '10'
                    413: 	 },
                    414:      increment => {
                    415: 	 default => '1.0',
                    416: 	 test => $real_test,
1.90      matthew   417: 	 description => 'Place a major tic every',
1.45      matthew   418: 	 edit_type   => 'entry',
                    419: 	 size        => '10'
                    420: 	 },
                    421:      end => {
                    422: 	 default => ' 10.0',
                    423: 	 test => $real_test,
1.90      matthew   424: 	 description => 'Stop major tics at ',
1.45      matthew   425: 	 edit_type   => 'entry',
                    426: 	 size        => '10'
                    427: 	 },
1.89      matthew   428:      minorfreq => {
                    429: 	 default => '0',
                    430: 	 test => $int_test,
1.98      matthew   431: 	 description => 'Number of minor tics per major tic mark',
1.89      matthew   432: 	 edit_type   => 'entry',
                    433: 	 size        => '10'
                    434: 	 },         
1.45      matthew   435:      );
                    436: 
1.65      matthew   437: my @axis_edit_order = ('color','xmin','xmax','ymin','ymax');
1.1       matthew   438: my %axis_defaults = 
                    439:     (
1.28      matthew   440:      color   => {
1.20      matthew   441: 	 default => 'x000000', 
                    442: 	 test => $color_test,
1.120   ! albertel  443: 	 description => 'Color of grid lines (x000000)',
1.38      matthew   444: 	 edit_type   => 'entry',
                    445: 	 size        => '10'
1.20      matthew   446: 	 },
                    447:      xmin      => {
                    448: 	 default => '-10.0',
                    449: 	 test => $real_test,
1.120   ! albertel  450: 	 description => 'Minimum x-value shown in plot',
1.38      matthew   451: 	 edit_type   => 'entry',
                    452: 	 size        => '10'
1.20      matthew   453: 	 },
                    454:      xmax      => {
                    455: 	 default => ' 10.0',
                    456: 	 test => $real_test,
1.120   ! albertel  457: 	 description => 'Maximum x-value shown in plot',	 
1.38      matthew   458: 	 edit_type   => 'entry',
                    459: 	 size        => '10'
1.20      matthew   460: 	 },
                    461:      ymin      => {
                    462: 	 default => '-10.0',
                    463: 	 test => $real_test,
1.120   ! albertel  464: 	 description => 'Minimum y-value shown in plot',	 
1.38      matthew   465: 	 edit_type   => 'entry',
                    466: 	 size        => '10'
1.20      matthew   467: 	 },
                    468:      ymax      => {
                    469: 	 default => ' 10.0',
                    470: 	 test => $real_test,
1.120   ! albertel  471: 	 description => 'Maximum y-value shown in plot',	 
1.38      matthew   472: 	 edit_type   => 'entry',
                    473: 	 size        => '10'
1.20      matthew   474: 	 }
1.1       matthew   475:      );
                    476: 
1.119     albertel  477: my @curve_edit_order = ('color','name','linestyle','linewidth','pointtype','pointsize','limit');
1.60      matthew   478: 
1.1       matthew   479: my %curve_defaults = 
                    480:     (
1.20      matthew   481:      color     => {
                    482: 	 default => 'x000000',
                    483: 	 test => $color_test,
1.120   ! albertel  484: 	 description => 'Color of curve (x000000)',
1.38      matthew   485: 	 edit_type   => 'entry',
                    486: 	 size        => '10'
1.20      matthew   487: 	 },
                    488:      name      => {
                    489: 	 default => '',
                    490: 	 test => $words_test,
1.120   ! albertel  491: 	 description => 'Name of curve to appear in key',
1.38      matthew   492: 	 edit_type   => 'entry',
                    493: 	 size        => '20'
1.20      matthew   494: 	 },
                    495:      linestyle => {
                    496: 	 default => 'lines',
                    497: 	 test => $linestyle_test,
1.35      matthew   498: 	 description => 'Line style',
1.20      matthew   499: 	 edit_type   => 'choice',
1.38      matthew   500: 	 choices     => [keys(%linestyles)]
1.60      matthew   501: 	 },
1.119     albertel  502:      linewidth => {
                    503:          default     => 4,
                    504:          test        => $int_test,
                    505:          description => 'Line width (may not apply to all line styles)',
                    506:          edit_type   => 'choice',
                    507:          choices     => [1,2,3,4,5,6,7,8,9,10]
                    508:          },
1.60      matthew   509:      pointsize => {
                    510:          default     => 1,
1.62      matthew   511:          test        => $pos_real_test,
1.120   ! albertel  512:          description => 'Point size (may not apply to all line styles)',
1.62      matthew   513:          edit_type   => 'entry',
                    514:          size        => '5'
                    515:          },
                    516:      pointtype => {
                    517:          default     => 1,
1.60      matthew   518:          test        => $int_test,
1.120   ! albertel  519:          description => 'Point type (may not apply to all line styles)',
1.60      matthew   520:          edit_type   => 'choice',
1.62      matthew   521:          choices     => [0,1,2,3,4,5,6]
1.110     albertel  522:          },
                    523:      limit     => {
                    524:          default     => 'closed',
                    525: 	 test        => sub {$_[0]=~/^(closed|x1|x2|y1|y2)$/},
1.120   ! albertel  526:          description => 'Point to fill -- for filledcurves',
1.110     albertel  527:          edit_type   => 'choice',
                    528:          choices     => ['closed','x1','x2','y1','y2']
                    529:          },
1.1       matthew   530:      );
                    531: 
1.21      matthew   532: ###################################################################
                    533: ##                                                               ##
                    534: ##                    parsing and edit rendering                 ##
                    535: ##                                                               ##
                    536: ###################################################################
1.107     foxr      537: 
                    538: undef %Apache::lonplot::plot;
                    539: my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
1.1       matthew   540: 
1.47      matthew   541: sub start_gnuplot {
1.107     foxr      542:     undef(%Apache::lonplot::plot);   undef(%key);    undef(%axis);
1.89      matthew   543:     undef($title);  undef($xlabel); undef($ylabel);
                    544:     undef(@labels); undef(@curves);
                    545:     undef(%xtics);  undef(%ytics);
1.6       matthew   546:     #
1.1       matthew   547:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    548:     my $result='';
1.25      matthew   549:     &Apache::lonxml::register('Apache::lonplot',
1.45      matthew   550: 	     ('title','xlabel','ylabel','key','axis','label','curve',
                    551: 	      'xtics','ytics'));
1.29      matthew   552:     push (@Apache::lonxml::namespace,'lonplot');
1.51      matthew   553:     if ($target eq 'web' || $target eq 'tex') {
1.107     foxr      554: 	&get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
1.17      matthew   555: 			$tagstack->[-1]);
1.20      matthew   556:     } elsif ($target eq 'edit') {
1.47      matthew   557: 	$result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
                    558: 	$result .= &edit_attributes($target,$token,\%gnuplot_defaults,
1.116     albertel  559: 				    \@gnuplot_edit_order)
                    560: 	    .&Apache::edit::end_row()
                    561: 	    .&Apache::edit::start_spanning_row();
1.20      matthew   562:     } elsif ($target eq 'modified') {
                    563: 	my $constructtag=&Apache::edit::get_new_args
1.47      matthew   564: 	    ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
1.20      matthew   565: 	if ($constructtag) {
                    566: 	    $result = &Apache::edit::rebuild_tag($token);
                    567: 	}
1.4       matthew   568:     }
1.21      matthew   569:     return $result;
1.1       matthew   570: }
                    571: 
1.47      matthew   572: sub end_gnuplot {
1.1       matthew   573:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    574:     pop @Apache::lonxml::namespace;
1.4       matthew   575:     &Apache::lonxml::deregister('Apache::lonplot',
                    576: 	('title','xlabel','ylabel','key','axis','label','curve'));
                    577:     my $result = '';
1.56      albertel  578:     my $randnumber;
                    579:     # need to call rand everytime start_script would evaluate, as the
                    580:     # safe space rand number generator and the global rand generator 
1.95      www       581:     # are not separate
1.56      albertel  582:     if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
                    583: 	$target eq 'answer') {
                    584:       $randnumber=int(rand(1000));
                    585:     }
1.51      matthew   586:     if ($target eq 'web' || $target eq 'tex') {
1.21      matthew   587: 	&check_inputs(); # Make sure we have all the data we need
1.13      matthew   588: 	##
                    589: 	## Determine filename
1.4       matthew   590: 	my $tmpdir = '/home/httpd/perl/tmp/';
1.106     albertel  591: 	my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
1.69      matthew   592: 	    '_'.time.'_'.$$.$randnumber.'_plot';
1.4       matthew   593: 	## Write the plot description to the file
1.51      matthew   594: 	&write_gnuplot_file($tmpdir,$filename,$target);
1.113     www       595: 	$filename = &escape($filename);
1.4       matthew   596: 	## return image tag for the plot
1.51      matthew   597: 	if ($target eq 'web') {
                    598: 	    $result .= <<"ENDIMAGE";
1.114     albertel  599: <img src    = "/cgi-bin/plot.$weboutputformat?file=$filename.data" 
1.107     foxr      600:      width  = "$Apache::lonplot::plot{'width'}"
                    601:      height = "$Apache::lonplot::plot{'height'}"
                    602:      align  = "$Apache::lonplot::plot{'align'}"
                    603:      alt    = "$Apache::lonplot::plot{'alttag'}" />
1.12      matthew   604: ENDIMAGE
1.51      matthew   605:         } elsif ($target eq 'tex') {
1.107     foxr      606: 	    &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
                    607: 	    &Apache::lonxml::debug(" gnuplot ht  = $Apache::lonplot::plot{'height'}");
1.91      albertel  608: 	    #might be inside the safe space, register the URL for later
                    609: 	    &Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
1.111     albertel  610: 	    $result  = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'}\n";
1.109     foxr      611: 	    $result .= '\graphicspath{{/home/httpd/perl/tmp/}}'."\n";
1.113     www       612: 	    $result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}';
1.51      matthew   613: 	}
1.20      matthew   614:     } elsif ($target eq 'edit') {
1.21      matthew   615: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   616:     }
1.1       matthew   617:     return $result;
                    618: }
1.2       matthew   619: 
1.45      matthew   620: 
                    621: ##--------------------------------------------------------------- xtics
                    622: sub start_xtics {
                    623:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    624:     my $result='';
1.51      matthew   625:     if ($target eq 'web' || $target eq 'tex') {
1.45      matthew   626: 	&get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
                    627: 		    $tagstack->[-1]);
                    628:     } elsif ($target eq 'edit') {
                    629: 	$result .= &Apache::edit::tag_start($target,$token,'xtics');
                    630: 	$result .= &edit_attributes($target,$token,\%tic_defaults,
                    631: 				    \@tic_edit_order);
                    632:     } elsif ($target eq 'modified') {
                    633: 	my $constructtag=&Apache::edit::get_new_args
                    634: 	    ($token,$parstack,$safeeval,keys(%tic_defaults));
                    635: 	if ($constructtag) {
                    636: 	    $result = &Apache::edit::rebuild_tag($token);
                    637: 	}
                    638:     }
                    639:     return $result;
                    640: }
                    641: 
                    642: sub end_xtics {
                    643:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    644:     my $result = '';
1.51      matthew   645:     if ($target eq 'web' || $target eq 'tex') {
1.45      matthew   646:     } elsif ($target eq 'edit') {
                    647: 	$result.=&Apache::edit::tag_end($target,$token);
                    648:     }
                    649:     return $result;
                    650: }
                    651: 
                    652: ##--------------------------------------------------------------- ytics
                    653: sub start_ytics {
                    654:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    655:     my $result='';
1.51      matthew   656:     if ($target eq 'web' || $target eq 'tex') {
1.45      matthew   657: 	&get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
                    658: 		    $tagstack->[-1]);
                    659:     } elsif ($target eq 'edit') {
                    660: 	$result .= &Apache::edit::tag_start($target,$token,'ytics');
                    661: 	$result .= &edit_attributes($target,$token,\%tic_defaults,
                    662: 				    \@tic_edit_order);
                    663:     } elsif ($target eq 'modified') {
                    664: 	my $constructtag=&Apache::edit::get_new_args
                    665: 	    ($token,$parstack,$safeeval,keys(%tic_defaults));
                    666: 	if ($constructtag) {
                    667: 	    $result = &Apache::edit::rebuild_tag($token);
                    668: 	}
                    669:     }
                    670:     return $result;
                    671: }
                    672: 
                    673: sub end_ytics {
                    674:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    675:     my $result = '';
1.51      matthew   676:     if ($target eq 'web' || $target eq 'tex') {
1.45      matthew   677:     } elsif ($target eq 'edit') {
                    678: 	$result.=&Apache::edit::tag_end($target,$token);
                    679:     }
                    680:     return $result;
                    681: }
                    682: 
1.119     albertel  683: ##-----------------------------------------------------------------font
1.120   ! albertel  684: my %font_properties =
        !           685:     (
        !           686:      'classic'    => {
        !           687: 	 face       => 'classic',
        !           688: 	 file       => 'DejaVuSansMono-Bold',
        !           689: 	 printname  => 'Helvetica',
        !           690:      },
        !           691:      'sans-serif' => {
        !           692: 	 face       => 'sans-serif',
        !           693: 	 file       => 'DejaVuSans',
        !           694: 	 printname  => 'DejaVuSans',
        !           695:      },
        !           696:      'serif'      => {
        !           697: 	 face       => 'serif',
        !           698: 	 file       => 'DejaVuSerif',
        !           699: 	 printname  => 'DejaVuSerif',
        !           700:      },
        !           701:      );
        !           702: 
1.119     albertel  703: sub get_font {
1.120   ! albertel  704:     my ($size, $selected_font);
        !           705: 
1.119     albertel  706:     if ( $Apache::lonplot::plot{'font'} =~ /^(small|medium|large)/) {
1.120   ! albertel  707: 	$selected_font = $font_properties{'classic'};
1.119     albertel  708: 	if ( $Apache::lonplot::plot{'font'} eq 'small') {
                    709: 	    $size = '5';
                    710: 	} elsif ( $Apache::lonplot::plot{'font'} eq 'medium') {
                    711: 	    $size = '9';
                    712: 	} elsif ( $Apache::lonplot::plot{'font'} eq 'large') {
                    713: 	    $size = '15';
                    714: 	} else {
                    715: 	    $size = '9';
                    716: 	}
                    717:     } else {
1.120   ! albertel  718: 	$selected_font = $font_properties{$Apache::lonplot::plot{'fontface'}};
1.119     albertel  719:     }
1.120   ! albertel  720:     return ($size, $selected_font);
1.119     albertel  721: }
1.45      matthew   722: 
1.1       matthew   723: ##----------------------------------------------------------------- key
                    724: sub start_key {
                    725:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    726:     my $result='';
1.51      matthew   727:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   728: 	&get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
1.11      matthew   729: 		    $tagstack->[-1]);
1.20      matthew   730:     } elsif ($target eq 'edit') {
1.25      matthew   731: 	$result .= &Apache::edit::tag_start($target,$token,'Plot Key');
1.21      matthew   732: 	$result .= &edit_attributes($target,$token,\%key_defaults);
1.20      matthew   733:     } elsif ($target eq 'modified') {
                    734: 	my $constructtag=&Apache::edit::get_new_args
1.24      matthew   735: 	    ($token,$parstack,$safeeval,keys(%key_defaults));
1.20      matthew   736: 	if ($constructtag) {
                    737: 	    $result = &Apache::edit::rebuild_tag($token);
                    738: 	}
1.4       matthew   739:     }
1.1       matthew   740:     return $result;
                    741: }
                    742: 
                    743: sub end_key {
                    744:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    745:     my $result = '';
1.51      matthew   746:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   747:     } elsif ($target eq 'edit') {
1.21      matthew   748: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   749:     }
1.1       matthew   750:     return $result;
                    751: }
1.21      matthew   752: 
1.1       matthew   753: ##------------------------------------------------------------------- title
                    754: sub start_title {
                    755:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    756:     my $result='';
1.51      matthew   757:     if ($target eq 'web' || $target eq 'tex') {
1.112     albertel  758: 	$title = &Apache::lonxml::get_all_text("/title",$parser,$style);
1.58      matthew   759: 	$title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
1.49      matthew   760: 	$title =~ s/\n/ /g;
1.32      matthew   761: 	if (length($title) > $max_str_len) {
                    762: 	    $title = substr($title,0,$max_str_len);
                    763: 	}
1.20      matthew   764:     } elsif ($target eq 'edit') {
1.25      matthew   765: 	$result.=&Apache::edit::tag_start($target,$token,'Plot Title');
1.112     albertel  766: 	my $text=&Apache::lonxml::get_all_text("/title",$parser,$style);
1.116     albertel  767: 	$result.=&Apache::edit::editline('',$text,'',60);
1.20      matthew   768:     } elsif ($target eq 'modified') {
1.42      matthew   769: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel  770: 	$result.=&Apache::edit::modifiedfield("/title",$parser);
1.4       matthew   771:     }
1.1       matthew   772:     return $result;
                    773: }
                    774: 
                    775: sub end_title {
                    776:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    777:     my $result = '';
1.51      matthew   778:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   779:     } elsif ($target eq 'edit') {
1.27      matthew   780: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   781:     }
1.1       matthew   782:     return $result;
                    783: }
                    784: ##------------------------------------------------------------------- xlabel
                    785: sub start_xlabel {
                    786:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    787:     my $result='';
1.51      matthew   788:     if ($target eq 'web' || $target eq 'tex') {
1.112     albertel  789: 	$xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1.58      matthew   790: 	$xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
1.49      matthew   791: 	$xlabel =~ s/\n/ /g;
1.32      matthew   792: 	if (length($xlabel) > $max_str_len) {
                    793: 	    $xlabel = substr($xlabel,0,$max_str_len);
                    794: 	}
1.20      matthew   795:     } elsif ($target eq 'edit') {
1.25      matthew   796: 	$result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
1.112     albertel  797: 	my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
1.116     albertel  798: 	$result.=&Apache::edit::editline('',$text,'',60);
1.20      matthew   799:     } elsif ($target eq 'modified') {
1.42      matthew   800: 	$result.=&Apache::edit::rebuild_tag($token);	
1.93      albertel  801: 	$result.=&Apache::edit::modifiedfield("/xlabel",$parser);
1.4       matthew   802:     }
1.1       matthew   803:     return $result;
                    804: }
                    805: 
                    806: sub end_xlabel {
                    807:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    808:     my $result = '';
1.51      matthew   809:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   810:     } elsif ($target eq 'edit') {
1.27      matthew   811: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   812:     }
1.1       matthew   813:     return $result;
                    814: }
1.21      matthew   815: 
1.1       matthew   816: ##------------------------------------------------------------------- ylabel
                    817: sub start_ylabel {
                    818:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    819:     my $result='';
1.51      matthew   820:     if ($target eq 'web' || $target eq 'tex') {
1.112     albertel  821: 	$ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1.58      matthew   822: 	$ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
1.49      matthew   823: 	$ylabel =~ s/\n/ /g;
1.32      matthew   824: 	if (length($ylabel) > $max_str_len) {
                    825: 	    $ylabel = substr($ylabel,0,$max_str_len);
                    826: 	}
1.20      matthew   827:     } elsif ($target eq 'edit') {
1.25      matthew   828: 	$result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
1.112     albertel  829: 	my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
1.116     albertel  830: 	$result .= &Apache::edit::editline('',$text,'',60);
1.20      matthew   831:     } elsif ($target eq 'modified') {
1.42      matthew   832: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel  833: 	$result.=&Apache::edit::modifiedfield("/ylabel",$parser);
1.4       matthew   834:     }
1.1       matthew   835:     return $result;
                    836: }
                    837: 
                    838: sub end_ylabel {
                    839:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    840:     my $result = '';
1.51      matthew   841:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   842:     } elsif ($target eq 'edit') {
1.27      matthew   843: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   844:     }
1.1       matthew   845:     return $result;
                    846: }
1.21      matthew   847: 
1.1       matthew   848: ##------------------------------------------------------------------- label
                    849: sub start_label {
                    850:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    851:     my $result='';
1.51      matthew   852:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   853: 	my %label;
                    854: 	&get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
1.11      matthew   855: 		    $tagstack->[-1]);
1.112     albertel  856: 	my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1.58      matthew   857: 	$text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
1.49      matthew   858: 	$text =~ s/\n/ /g;
1.32      matthew   859: 	$text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
                    860: 	$label{'text'} = $text;
1.17      matthew   861: 	push(@labels,\%label);
1.20      matthew   862:     } elsif ($target eq 'edit') {
1.25      matthew   863: 	$result .= &Apache::edit::tag_start($target,$token,'Plot Label');
1.21      matthew   864: 	$result .= &edit_attributes($target,$token,\%label_defaults);
1.112     albertel  865: 	my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
1.39      matthew   866: 	$result .= &Apache::edit::end_row().
                    867: 	    &Apache::edit::start_spanning_row().
1.63      albertel  868: 	    &Apache::edit::editline('',$text,'',60);
1.20      matthew   869:     } elsif ($target eq 'modified') {
1.42      matthew   870: 	&Apache::edit::get_new_args
1.24      matthew   871: 	    ($token,$parstack,$safeeval,keys(%label_defaults));
1.42      matthew   872: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel  873: 	$result.=&Apache::edit::modifiedfield("/label",$parser);
1.4       matthew   874:     }
1.1       matthew   875:     return $result;
                    876: }
                    877: 
                    878: sub end_label {
                    879:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    880:     my $result = '';
1.51      matthew   881:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   882:     } elsif ($target eq 'edit') {
1.21      matthew   883: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   884:     }
1.1       matthew   885:     return $result;
                    886: }
                    887: 
                    888: ##------------------------------------------------------------------- curve
                    889: sub start_curve {
                    890:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    891:     my $result='';
1.25      matthew   892:     &Apache::lonxml::register('Apache::lonplot',('function','data'));
                    893:     push (@Apache::lonxml::namespace,'curve');
1.51      matthew   894:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   895: 	my %curve;
                    896: 	&get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
1.11      matthew   897: 		    $tagstack->[-1]);
1.17      matthew   898: 	push (@curves,\%curve);
1.20      matthew   899:     } elsif ($target eq 'edit') {
1.26      matthew   900: 	$result .= &Apache::edit::tag_start($target,$token,'Curve');
1.60      matthew   901: 	$result .= &edit_attributes($target,$token,\%curve_defaults,
1.116     albertel  902:                                     \@curve_edit_order)
                    903: 	    .&Apache::edit::end_row()
                    904: 	    .&Apache::edit::start_spanning_row();
                    905: 
1.20      matthew   906:     } elsif ($target eq 'modified') {
                    907: 	my $constructtag=&Apache::edit::get_new_args
1.35      matthew   908: 	    ($token,$parstack,$safeeval,keys(%curve_defaults));
1.20      matthew   909: 	if ($constructtag) {
                    910: 	    $result = &Apache::edit::rebuild_tag($token);
                    911: 	}
1.4       matthew   912:     }
1.1       matthew   913:     return $result;
                    914: }
                    915: 
                    916: sub end_curve {
                    917:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    918:     my $result = '';
1.25      matthew   919:     pop @Apache::lonxml::namespace;
                    920:     &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
1.51      matthew   921:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   922:     } elsif ($target eq 'edit') {
1.21      matthew   923: 	$result.=&Apache::edit::tag_end($target,$token);
1.4       matthew   924:     }
1.1       matthew   925:     return $result;
                    926: }
1.21      matthew   927: 
1.1       matthew   928: ##------------------------------------------------------------ curve function
                    929: sub start_function {
                    930:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    931:     my $result='';
1.51      matthew   932:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   933: 	if (exists($curves[-1]->{'data'})) {
1.85      matthew   934: 	    &Apache::lonxml::warning
                    935:                 ('Use of the <b>curve function</b> tag precludes use of '.
                    936:                  ' the <b>curve data</b> tag.  '.
                    937:                  'The curve data tag will be omitted in favor of the '.
                    938:                  'curve function declaration.');
1.17      matthew   939: 	    delete $curves[-1]->{'data'} ;
                    940: 	}
1.112     albertel  941:         my $function = &Apache::lonxml::get_all_text("/function",$parser,
                    942: 						     $style);
1.58      matthew   943: 	$function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
                    944: 	$curves[-1]->{'function'} = $function; 
1.20      matthew   945:     } elsif ($target eq 'edit') {
1.37      matthew   946: 	$result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
1.112     albertel  947: 	my $text = &Apache::lonxml::get_all_text("/function",$parser,$style);
1.116     albertel  948: 	$result .= &Apache::edit::editline('',$text,'',60);
1.20      matthew   949:     } elsif ($target eq 'modified') {
1.42      matthew   950: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel  951: 	$result.=&Apache::edit::modifiedfield("/function",$parser);
1.4       matthew   952:     }
1.1       matthew   953:     return $result;
                    954: }
                    955: 
                    956: sub end_function {
                    957:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    958:     my $result = '';
1.51      matthew   959:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew   960:     } elsif ($target eq 'edit') {
1.26      matthew   961: 	$result .= &Apache::edit::end_table();
1.4       matthew   962:     }
1.1       matthew   963:     return $result;
                    964: }
1.21      matthew   965: 
1.1       matthew   966: ##------------------------------------------------------------ curve  data
                    967: sub start_data {
                    968:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    969:     my $result='';
1.51      matthew   970:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew   971: 	if (exists($curves[-1]->{'function'})) {
1.85      matthew   972: 	    &Apache::lonxml::warning
                    973:                 ('Use of the <b>curve function</b> tag precludes use of '.
                    974:                  ' the <b>curve data</b> tag.  '.
                    975:                  'The curve function tag will be omitted in favor of the '.
                    976:                  'curve data declaration.');
1.17      matthew   977: 	    delete($curves[-1]->{'function'});
                    978: 	}
1.112     albertel  979: 	my $datatext = &Apache::lonxml::get_all_text("/data",$parser,$style);
1.58      matthew   980: 	$datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
1.40      matthew   981: 	# Deal with cases where we're given an array...
                    982: 	if ($datatext =~ /^\@/) {
                    983: 	    $datatext = &Apache::run::run('return "'.$datatext.'"',
                    984: 					  $safeeval,1);
                    985: 	}
1.49      matthew   986: 	$datatext =~ s/\s+/ /g;
1.17      matthew   987: 	# Need to do some error checking on the @data array - 
                    988: 	# make sure it's all numbers and make sure each array 
                    989: 	# is of the same length.
                    990: 	my @data;
1.35      matthew   991: 	if ($datatext =~ /,/) { # comma deliminated
1.17      matthew   992: 	    @data = split /,/,$datatext;
1.95      www       993: 	} else { # Assume it's space separated.
1.17      matthew   994: 	    @data = split / /,$datatext;
                    995: 	}
                    996: 	for (my $i=0;$i<=$#data;$i++) {
                    997: 	    # Check that it's non-empty
1.19      matthew   998: 	    if (! defined($data[$i])) {
                    999: 		&Apache::lonxml::warning(
1.85      matthew  1000: 		    'undefined curve data value.  Replacing with '.
1.19      matthew  1001: 		    ' pi/e = 1.15572734979092');
                   1002: 		$data[$i] = 1.15572734979092;
                   1003: 	    }
1.17      matthew  1004: 	    # Check that it's a number
1.19      matthew  1005: 	    if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
                   1006: 		&Apache::lonxml::warning(
1.85      matthew  1007: 		    'Bad curve data value of '.$data[$i].'  Replacing with '.
1.19      matthew  1008: 		    ' pi/e = 1.15572734979092');
                   1009: 		$data[$i] = 1.15572734979092;
                   1010: 	    }
1.17      matthew  1011: 	}
1.35      matthew  1012: 	# complain if the number of data points is not the same as
                   1013: 	# in previous sets of data.
1.36      matthew  1014: 	if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
1.35      matthew  1015: 	    &Apache::lonxml::warning
                   1016: 		('Number of data points is not consistent with previous '.
                   1017: 		 'number of data points');
                   1018: 	}
1.17      matthew  1019: 	push  @{$curves[-1]->{'data'}},\@data;
1.20      matthew  1020:     } elsif ($target eq 'edit') {
1.37      matthew  1021: 	$result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
1.112     albertel 1022: 	my $text = &Apache::lonxml::get_all_text("/data",$parser,$style);
1.116     albertel 1023: 	$result .= &Apache::edit::editline('',$text,'',60);
1.20      matthew  1024:     } elsif ($target eq 'modified') {
1.42      matthew  1025: 	$result.=&Apache::edit::rebuild_tag($token);
1.93      albertel 1026: 	$result.=&Apache::edit::modifiedfield("/data",$parser);
1.4       matthew  1027:     }
1.1       matthew  1028:     return $result;
                   1029: }
                   1030: 
                   1031: sub end_data {
                   1032:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1033:     my $result = '';
1.51      matthew  1034:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew  1035:     } elsif ($target eq 'edit') {
1.26      matthew  1036: 	$result .= &Apache::edit::end_table();
1.4       matthew  1037:     }
1.1       matthew  1038:     return $result;
                   1039: }
                   1040: 
                   1041: ##------------------------------------------------------------------- axis
                   1042: sub start_axis {
                   1043:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1044:     my $result='';
1.51      matthew  1045:     if ($target eq 'web' || $target eq 'tex') {
1.17      matthew  1046: 	&get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
                   1047: 			$tagstack->[-1]);
1.20      matthew  1048:     } elsif ($target eq 'edit') {
1.25      matthew  1049: 	$result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
1.65      matthew  1050: 	$result .= &edit_attributes($target,$token,\%axis_defaults,
                   1051: 				    \@axis_edit_order);
1.20      matthew  1052:     } elsif ($target eq 'modified') {
1.29      matthew  1053: 	my $constructtag=&Apache::edit::get_new_args
                   1054: 	    ($token,$parstack,$safeeval,keys(%axis_defaults));
                   1055: 	if ($constructtag) {
                   1056: 	    $result = &Apache::edit::rebuild_tag($token);
                   1057: 	}
1.4       matthew  1058:     }
1.1       matthew  1059:     return $result;
                   1060: }
                   1061: 
                   1062: sub end_axis {
                   1063:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1064:     my $result = '';
1.51      matthew  1065:     if ($target eq 'web' || $target eq 'tex') {
1.20      matthew  1066:     } elsif ($target eq 'edit') {
1.21      matthew  1067: 	$result.=&Apache::edit::tag_end($target,$token);
1.20      matthew  1068:     } elsif ($target eq 'modified') {
1.4       matthew  1069:     }
1.1       matthew  1070:     return $result;
                   1071: }
                   1072: 
1.21      matthew  1073: ###################################################################
                   1074: ##                                                               ##
                   1075: ##        Utility Functions                                      ##
                   1076: ##                                                               ##
                   1077: ###################################################################
                   1078: 
1.13      matthew  1079: ##----------------------------------------------------------- set_defaults
                   1080: sub set_defaults {
1.21      matthew  1081:     my ($var,$defaults) = @_;
1.13      matthew  1082:     my $key;
1.24      matthew  1083:     foreach $key (keys(%$defaults)) {
1.13      matthew  1084: 	$var->{$key} = $defaults->{$key}->{'default'};
                   1085:     }
                   1086: }
                   1087: 
1.1       matthew  1088: ##------------------------------------------------------------------- misc
1.2       matthew  1089: sub get_attributes{
1.21      matthew  1090:     my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
1.24      matthew  1091:     foreach my $attr (keys(%{$defaults})) {
1.92      matthew  1092: 	if ($attr eq 'texwidth' || $attr eq 'texfont') {
1.86      albertel 1093: 	    $values->{$attr} = 
                   1094: 		&Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
                   1095: 	} else {
                   1096: 	    $values->{$attr} = 
                   1097: 		&Apache::lonxml::get_param($attr,$parstack,$safeeval);
                   1098: 	}
1.10      matthew  1099: 	if ($values->{$attr} eq '' | !defined($values->{$attr})) {
1.11      matthew  1100: 	    $values->{$attr} = $defaults->{$attr}->{'default'};
1.6       matthew  1101: 	    next;
                   1102: 	}
1.10      matthew  1103: 	my $test = $defaults->{$attr}->{'test'};
                   1104: 	if (! &$test($values->{$attr})) {
1.6       matthew  1105: 	    &Apache::lonxml::warning
                   1106: 		($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
1.11      matthew  1107: 		 .$defaults->{$attr}->{'default'} );
                   1108: 	    $values->{$attr} = $defaults->{$attr}->{'default'};
1.10      matthew  1109: 	}
1.2       matthew  1110:     }
1.11      matthew  1111:     return ;
1.6       matthew  1112: }
1.40      matthew  1113: 
1.15      matthew  1114: ##------------------------------------------------------- write_gnuplot_file
1.6       matthew  1115: sub write_gnuplot_file {
1.51      matthew  1116:     my ($tmpdir,$filename,$target)= @_;
1.120   ! albertel 1117:     my ($fontsize, $font_properties) =  &get_font();
1.6       matthew  1118:     my $gnuplot_input = '';
1.10      matthew  1119:     my $curve;
1.107     foxr     1120:     my $pt = $Apache::lonplot::plot{'texfont'};
1.100     matthew  1121:     #
                   1122:     # Check to be sure we do not have any empty curves
                   1123:     my @curvescopy;
                   1124:     foreach my $curve (@curves) {
                   1125:         if (exists($curve->{'function'})) {
                   1126:             if ($curve->{'function'} !~ /^\s*$/) {
                   1127:                 push(@curvescopy,$curve);
                   1128:             }
                   1129:         } elsif (exists($curve->{'data'})) {
                   1130:             foreach my $data (@{$curve->{'data'}}) {
                   1131:                 if (scalar(@$data) > 0) {
                   1132:                     push(@curvescopy,$curve);
                   1133:                     last;
                   1134:                 }
                   1135:             }
                   1136:         }
                   1137:     }
                   1138:     @curves = @curvescopy;
1.6       matthew  1139:     # Collect all the colors
                   1140:     my @Colors;
1.107     foxr     1141:     push @Colors, $Apache::lonplot::plot{'bgcolor'};
                   1142:     push @Colors, $Apache::lonplot::plot{'fgcolor'}; 
                   1143:     push @Colors, (defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'});
1.9       matthew  1144:     foreach $curve (@curves) {
                   1145: 	push @Colors, ($curve->{'color'} ne '' ? 
                   1146: 		       $curve->{'color'}       : 
1.107     foxr     1147: 		       $Apache::lonplot::plot{'fgcolor'}        );
1.6       matthew  1148:     }
                   1149:     # set term
1.51      matthew  1150:     if ($target eq 'web') {
1.120   ! albertel 1151: 	$gnuplot_input .= 'set terminal png enhanced nocrop ';
1.107     foxr     1152: 	$gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
1.120   ! albertel 1153: 	$gnuplot_input .= 'font "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
        !          1154: 	    '/'.$font_properties->{'file'}.'.ttf" ';
        !          1155: 	$gnuplot_input .= $fontsize;
        !          1156: 	$gnuplot_input .= ' size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
1.51      matthew  1157: 	$gnuplot_input .= "@Colors\n";
                   1158: 	# set output
                   1159: 	$gnuplot_input .= "set output\n";
                   1160:     } elsif ($target eq 'tex') {
1.120   ! albertel 1161: 	$gnuplot_input .= "set term postscript eps enhanced $Apache::lonplot::plot{'plotcolor'} solid ";
        !          1162: 	$gnuplot_input .=
        !          1163: 	    'fontfile "'.$Apache::lonnet::perlvar{'lonFontsDir'}.
        !          1164: 	    '/'.$font_properties->{'file'}.'.pfb" ';
        !          1165: 	$gnuplot_input .= ' "'.$font_properties->{'printname'}.'" ';
        !          1166: 	$gnuplot_input .= $fontsize;
        !          1167: 	$gnuplot_input .= "\nset output \"/home/httpd/perl/tmp/".
1.113     www      1168: 	    &unescape($filename).".eps\"\n";
1.87      matthew  1169:     }
1.115     albertel 1170:     # cartesian or polar plot?
1.107     foxr     1171:     if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
1.87      matthew  1172:         $gnuplot_input .= 'set polar'.$/;
                   1173:     } else {
                   1174:         # Assume Cartesian
1.51      matthew  1175:     }
1.115     albertel 1176:     # cartesian or polar grid?
                   1177:     if (lc($Apache::lonplot::plot{'gridtype'}) eq 'polar') {
                   1178:         $gnuplot_input .= 'set grid polar'.$/;
1.118     albertel 1179:     } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'linear-log') {
                   1180:         $gnuplot_input .= 'set logscale x'.$/;
                   1181:     } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-linear') {
                   1182:         $gnuplot_input .= 'set logscale y'.$/;
                   1183:     } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-log') {
                   1184:         $gnuplot_input .= 'set logscale x'.$/;
                   1185:         $gnuplot_input .= 'set logscale y'.$/;
1.115     albertel 1186:     } else {
                   1187:         # Assume Cartesian
                   1188:     }
1.110     albertel 1189:     # solid or pattern for boxes?
                   1190:     if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') {
                   1191:         $gnuplot_input .= 'set style fill solid '.
                   1192: 	    $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/;
                   1193:     } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') {
                   1194:         $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/;
                   1195:     } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
                   1196:     }
1.101     matthew  1197:     # margin
1.107     foxr     1198:     if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
                   1199:         $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
1.101     matthew  1200:     }
1.107     foxr     1201:     if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
                   1202:         $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
1.101     matthew  1203:     }
1.107     foxr     1204:     if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
                   1205:         $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
1.101     matthew  1206:     }
1.107     foxr     1207:     if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
                   1208:         $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
1.101     matthew  1209:     }
                   1210:     # tic scales
                   1211:     $gnuplot_input .= 'set ticscale '.
1.107     foxr     1212:         $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
1.110     albertel 1213:     #boxwidth
                   1214:     if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
                   1215: 	$gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
                   1216:     }
                   1217:     # gridlayer
                   1218:     $gnuplot_input .= 'set grid noxtics noytics front '.$/ 
                   1219: 	if ($Apache::lonplot::plot{'gridlayer'} eq 'on');
                   1220: 
1.7       matthew  1221:     # grid
1.107     foxr     1222:     $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
1.7       matthew  1223:     # border
1.107     foxr     1224:     $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
1.9       matthew  1225: 		       'set border'.$/           :
1.67      matthew  1226: 		       'set noborder'.$/         );
1.77      matthew  1227:     # sampling rate for non-data curves
1.107     foxr     1228:     $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
1.67      matthew  1229:     # title, xlabel, ylabel
1.45      matthew  1230:     # titles
1.89      matthew  1231:     if ($target eq 'tex') {
1.120   ! albertel 1232: 	$gnuplot_input .= "set title  \"$title\"  font \"".$font_properties->{'printname'}.",".$pt."pt\"\n" if (defined($title)) ;
        !          1233: 	$gnuplot_input .= "set xlabel \"$xlabel\" font \"".$font_properties->{'printname'}.",".$pt."pt\"\n" if (defined($xlabel));
        !          1234: 	$gnuplot_input .= "set ylabel \"$ylabel\" font \"".$font_properties->{'printname'}.",".$pt."pt\"\n" if (defined($ylabel));
1.89      matthew  1235:     } else {
1.120   ! albertel 1236:         $gnuplot_input .= "set title  \"$title\"  \n" if (defined($title)) ;
1.89      matthew  1237:         $gnuplot_input .= "set xlabel \"$xlabel\" \n" if (defined($xlabel));
                   1238:         $gnuplot_input .= "set ylabel \"$ylabel\" \n" if (defined($ylabel));
                   1239:     }
1.45      matthew  1240:     # tics
                   1241:     if (%xtics) {    
                   1242: 	$gnuplot_input .= "set xtics $xtics{'location'} ";
1.46      matthew  1243: 	$gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1.45      matthew  1244: 	$gnuplot_input .= "$xtics{'start'}, ";
                   1245: 	$gnuplot_input .= "$xtics{'increment'}, ";
                   1246: 	$gnuplot_input .= "$xtics{'end'}\n";
1.89      matthew  1247:         if ($xtics{'minorfreq'} != 0) {
                   1248:             $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n";
                   1249:         } 
1.45      matthew  1250:     }
                   1251:     if (%ytics) {    
                   1252: 	$gnuplot_input .= "set ytics $ytics{'location'} ";
1.46      matthew  1253: 	$gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
1.45      matthew  1254: 	$gnuplot_input .= "$ytics{'start'}, ";
                   1255: 	$gnuplot_input .= "$ytics{'increment'}, ";
                   1256:         $gnuplot_input .= "$ytics{'end'}\n";
1.89      matthew  1257:         if ($ytics{'minorfreq'} != 0) {
                   1258:             $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
                   1259:         } 
1.45      matthew  1260:     }
                   1261:     # axis
1.23      matthew  1262:     if (%axis) {
1.13      matthew  1263: 	$gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
                   1264: 	$gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
1.6       matthew  1265:     }
                   1266:     # Key
1.23      matthew  1267:     if (%key) {
1.9       matthew  1268: 	$gnuplot_input .= 'set key '.$key{'pos'}.' ';
                   1269: 	if ($key{'title'} ne '') {
1.67      matthew  1270: 	    $gnuplot_input .= 'title "'.$key{'title'}.'" ';
1.11      matthew  1271: 	} 
                   1272: 	$gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
1.6       matthew  1273:     } else {
1.9       matthew  1274: 	$gnuplot_input .= 'set nokey'.$/;
1.13      matthew  1275:     }
1.6       matthew  1276:     # labels
1.10      matthew  1277:     my $label;
1.6       matthew  1278:     foreach $label (@labels) {
                   1279: 	$gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
1.103     matthew  1280: 	    $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'};
                   1281:         if ($target eq 'tex') {
1.120   ! albertel 1282: 	    $gnuplot_input .=' font "'.$font_properties->{'printname'}.','.$pt.'pt"' ;
1.103     matthew  1283:         }
                   1284:         $gnuplot_input .= $/;
1.6       matthew  1285:     }
1.74      matthew  1286:     if ($target eq 'tex') {
1.107     foxr     1287:         $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
1.74      matthew  1288:         $gnuplot_input .="\n";
1.120   ! albertel 1289:     }
1.6       matthew  1290:     # curves
                   1291:     $gnuplot_input .= 'plot ';
1.9       matthew  1292:     for (my $i = 0;$i<=$#curves;$i++) {
                   1293: 	$curve = $curves[$i];
                   1294: 	$gnuplot_input.= ', ' if ($i > 0);
1.119     albertel 1295: 	if ($target eq 'tex') {
                   1296: 	    $curve->{'linewidth'} *= 2;
                   1297: 	}
1.6       matthew  1298: 	if (exists($curve->{'function'})) {
1.9       matthew  1299: 	    $gnuplot_input.= 
                   1300: 		$curve->{'function'}.' title "'.
                   1301: 		$curve->{'name'}.'" with '.
1.72      matthew  1302:                 $curve->{'linestyle'};
1.119     albertel 1303:             $gnuplot_input.= ' linewidth '.$curve->{'linewidth'};
                   1304: 
1.60      matthew  1305:             if (($curve->{'linestyle'} eq 'points')      ||
                   1306:                 ($curve->{'linestyle'} eq 'linespoints') ||
                   1307:                 ($curve->{'linestyle'} eq 'errorbars')   ||
                   1308:                 ($curve->{'linestyle'} eq 'xerrorbars')  ||
                   1309:                 ($curve->{'linestyle'} eq 'yerrorbars')  ||
                   1310:                 ($curve->{'linestyle'} eq 'xyerrorbars')) {
1.62      matthew  1311:                 $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
1.60      matthew  1312:                 $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1.110     albertel 1313:             } elsif ($curve->{'linestyle'} eq 'filledcurves') { 
                   1314:                 $gnuplot_input.= ' '.$curve->{'limit'};
1.60      matthew  1315:             }
1.6       matthew  1316: 	} elsif (exists($curve->{'data'})) {
1.40      matthew  1317: 	    # Store data values in $datatext
                   1318: 	    my $datatext = '';
                   1319: 	    #   get new filename
1.70      matthew  1320: 	    my $datafilename = "$tmpdir/$filename.data.$i";
1.40      matthew  1321: 	    my $fh=Apache::File->new(">$datafilename");
                   1322: 	    # Compile data
1.6       matthew  1323: 	    my @Data = @{$curve->{'data'}};
1.9       matthew  1324: 	    my @Data0 = @{$Data[0]};
                   1325: 	    for (my $i =0; $i<=$#Data0; $i++) {
1.10      matthew  1326: 		my $dataset;
1.6       matthew  1327: 		foreach $dataset (@Data) {
1.9       matthew  1328: 		    $datatext .= $dataset->[$i] . ' ';
1.6       matthew  1329: 		}
1.9       matthew  1330: 		$datatext .= $/;
1.6       matthew  1331: 	    }
1.40      matthew  1332: 	    #   write file
                   1333: 	    print $fh $datatext;
1.119     albertel 1334: 	    close($fh);
1.40      matthew  1335: 	    #   generate gnuplot text
                   1336: 	    $gnuplot_input.= '"'.$datafilename.'" title "'.
                   1337: 		$curve->{'name'}.'" with '.
                   1338: 		$curve->{'linestyle'};
1.119     albertel 1339:             $gnuplot_input.= ' linewidth '.$curve->{'linewidth'};
1.62      matthew  1340:             if (($curve->{'linestyle'} eq 'points')      ||
                   1341:                 ($curve->{'linestyle'} eq 'linespoints') ||
                   1342:                 ($curve->{'linestyle'} eq 'errorbars')   ||
                   1343:                 ($curve->{'linestyle'} eq 'xerrorbars')  ||
                   1344:                 ($curve->{'linestyle'} eq 'yerrorbars')  ||
                   1345:                 ($curve->{'linestyle'} eq 'xyerrorbars')) {
                   1346:                 $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
                   1347:                 $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
1.110     albertel 1348:             } elsif ($curve->{'linestyle'} eq 'filledcurves') { 
                   1349:                 $gnuplot_input.= ' '.$curve->{'limit'};
1.62      matthew  1350:             }
1.6       matthew  1351: 	}
                   1352:     }
1.40      matthew  1353:     # Write the output to a file.
1.70      matthew  1354:     my $fh=Apache::File->new(">$tmpdir$filename.data");
1.40      matthew  1355:     print $fh $gnuplot_input;
                   1356:     close($fh);
                   1357:     # That's all folks.
                   1358:     return ;
1.2       matthew  1359: }
1.21      matthew  1360: 
                   1361: #---------------------------------------------- check_inputs
                   1362: sub check_inputs {
                   1363:     ## Note: no inputs, no outputs - this acts only on global variables.
                   1364:     ## Make sure we have all the input we need:
1.107     foxr     1365:     if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
1.23      matthew  1366:     if (! %key ) {} # No key for this plot, thats okay
1.34      matthew  1367: #    if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
1.21      matthew  1368:     if (! defined($title )) {} # No title for this plot, thats okay
                   1369:     if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
                   1370:     if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
                   1371:     if ($#labels < 0) { }      # No labels for this plot, thats okay
                   1372:     if ($#curves < 0) { 
                   1373: 	&Apache::lonxml::warning("No curves specified for plot!!!!");
                   1374: 	return '';
                   1375:     }
                   1376:     my $curve;
                   1377:     foreach $curve (@curves) {
                   1378: 	if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
1.85      matthew  1379: 	    &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
1.21      matthew  1380: 	    return '';
                   1381: 	}
                   1382:     }
                   1383: }
                   1384: 
1.20      matthew  1385: #------------------------------------------------ make_edit
                   1386: sub edit_attributes {
1.34      matthew  1387:     my ($target,$token,$defaults,$keys) = @_;
                   1388:     my ($result,@keys);
                   1389:     if ($keys && ref($keys) eq 'ARRAY') {
                   1390:         @keys = @$keys;
                   1391:     } else {
                   1392: 	@keys = sort(keys(%$defaults));
                   1393:     }
                   1394:     foreach my $attr (@keys) {
1.35      matthew  1395: 	# append a ' ' to the description if it doesn't have one already.
                   1396: 	my $description = $defaults->{$attr}->{'description'};
                   1397: 	$description .= ' ' if ($description !~ / $/);
1.20      matthew  1398: 	if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
1.35      matthew  1399: 	    $result .= &Apache::edit::text_arg
1.38      matthew  1400: 		($description,$attr,$token,
                   1401: 		 $defaults->{$attr}->{'size'});
1.20      matthew  1402: 	} elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
1.102     albertel 1403: 	    $result .= &Apache::edit::select_or_text_arg
1.35      matthew  1404: 		($description,$attr,$defaults->{$attr}->{'choices'},$token);
1.45      matthew  1405: 	} elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
1.102     albertel 1406: 	    $result .= &Apache::edit::select_or_text_arg
1.35      matthew  1407: 		($description,$attr,['on','off'],$token);
1.20      matthew  1408: 	}
1.25      matthew  1409: 	$result .= '<br />';
1.20      matthew  1410:     }
                   1411:     return $result;
                   1412: }
1.1       matthew  1413: 
1.21      matthew  1414: 
                   1415: ###################################################################
                   1416: ##                                                               ##
                   1417: ##           Insertion functions for editing plots               ##
                   1418: ##                                                               ##
                   1419: ###################################################################
                   1420: 
1.47      matthew  1421: sub insert_gnuplot {
1.29      matthew  1422:     my $result = '';
1.20      matthew  1423:     #  plot attributes
1.61      matthew  1424:     $result .= "\n<gnuplot ";
1.47      matthew  1425:     foreach my $attr (keys(%gnuplot_defaults)) {
1.61      matthew  1426: 	$result .= "\n     $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
1.20      matthew  1427:     }
1.61      matthew  1428:     $result .= ">";
1.47      matthew  1429:     # Add the components (most are commented out for simplicity)
1.44      matthew  1430:     # $result .= &insert_key();
                   1431:     # $result .= &insert_axis();
                   1432:     # $result .= &insert_title();    
                   1433:     # $result .= &insert_xlabel();    
                   1434:     # $result .= &insert_ylabel();    
1.20      matthew  1435:     $result .= &insert_curve();
1.50      matthew  1436:     # close up the <gnuplot>
1.61      matthew  1437:     $result .= "\n</gnuplot>";
1.45      matthew  1438:     return $result;
                   1439: }
                   1440: 
1.46      matthew  1441: sub insert_tics {
                   1442:     my $result;
                   1443:     $result .= &insert_xtics() . &insert_ytics;
                   1444:     return $result;
                   1445: }
                   1446: 
1.45      matthew  1447: sub insert_xtics {
                   1448:     my $result;
1.46      matthew  1449:     $result .= "\n    <xtics ";
1.45      matthew  1450:     foreach my $attr (keys(%tic_defaults)) {
1.61      matthew  1451: 	$result .= "\n        $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1.45      matthew  1452:     }
1.61      matthew  1453:     $result .= "/>";
1.45      matthew  1454:     return $result;
                   1455: }
                   1456: 
                   1457: sub insert_ytics {
                   1458:     my $result;
1.46      matthew  1459:     $result .= "\n    <ytics ";
1.45      matthew  1460:     foreach my $attr (keys(%tic_defaults)) {
1.61      matthew  1461: 	$result .= "\n        $attr=\"$tic_defaults{$attr}->{'default'}\" ";
1.45      matthew  1462:     }
1.61      matthew  1463:     $result .= "/>";
1.20      matthew  1464:     return $result;
                   1465: }
                   1466: 
                   1467: sub insert_key {
                   1468:     my $result;
1.61      matthew  1469:     $result .= "\n    <key ";
1.30      matthew  1470:     foreach my $attr (keys(%key_defaults)) {
1.61      matthew  1471: 	$result .= "\n         $attr=\"$key_defaults{$attr}->{'default'}\"";
1.20      matthew  1472:     }
1.61      matthew  1473:     $result .= " />";
1.20      matthew  1474:     return $result;
                   1475: }
                   1476: 
                   1477: sub insert_axis{
                   1478:     my $result;
1.46      matthew  1479:     $result .= "\n    <axis ";
1.30      matthew  1480:    foreach my $attr (keys(%axis_defaults)) {
1.61      matthew  1481: 	$result .= "\n         $attr=\"$axis_defaults{$attr}->{'default'}\"";
1.20      matthew  1482:     }
1.61      matthew  1483:     $result .= " />";
1.20      matthew  1484:     return $result;
                   1485: }
1.28      matthew  1486: 
1.61      matthew  1487: sub insert_title  { return "\n    <title></title>"; }
                   1488: sub insert_xlabel { return "\n    <xlabel></xlabel>"; }
                   1489: sub insert_ylabel { return "\n    <ylabel></ylabel>"; }
1.20      matthew  1490: 
                   1491: sub insert_label {
                   1492:     my $result;
1.46      matthew  1493:     $result .= "\n    <label ";
1.30      matthew  1494:     foreach my $attr (keys(%label_defaults)) {
1.61      matthew  1495: 	$result .= "\n         $attr=\"".
                   1496:             $label_defaults{$attr}->{'default'}."\"";
1.20      matthew  1497:     }
1.61      matthew  1498:     $result .= "></label>";
1.20      matthew  1499:     return $result;
                   1500: }
                   1501: 
                   1502: sub insert_curve {
                   1503:     my $result;
1.41      matthew  1504:     $result .= "\n    <curve ";
1.30      matthew  1505:     foreach my $attr (keys(%curve_defaults)) {
1.61      matthew  1506: 	$result .= "\n         $attr=\"".
                   1507: 	    $curve_defaults{$attr}->{'default'}."\"";
1.20      matthew  1508:     }
1.61      matthew  1509:     $result .= " >";
                   1510:     $result .= &insert_data().&insert_data()."\n    </curve>";
1.20      matthew  1511: }
1.4       matthew  1512: 
1.20      matthew  1513: sub insert_function {
                   1514:     my $result;
1.61      matthew  1515:     $result .= "\n        <function></function>";
1.20      matthew  1516:     return $result;
                   1517: }
1.4       matthew  1518: 
1.20      matthew  1519: sub insert_data {
                   1520:     my $result;
1.61      matthew  1521:     $result .= "\n        <data></data>";
1.20      matthew  1522:     return $result;
                   1523: }
1.4       matthew  1524: 
1.48      matthew  1525: ##----------------------------------------------------------------------
1.20      matthew  1526: 1;
                   1527: __END__
1.4       matthew  1528: 
                   1529: 

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