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Diff for /loncom/xml/lonplot.pm between versions 1.47 and 1.48

version 1.47, 2002/02/05 15:05:44 version 1.48, 2002/02/06 10:24:55
Line 29 Line 29
 # 12/17 12/18 12/19 12/20 12/21 12/27 12/28 12/30 12/31 Matthew  # 12/17 12/18 12/19 12/20 12/21 12/27 12/28 12/30 12/31 Matthew
 # 01/01/02 Matthew  # 01/01/02 Matthew
 # 01/02 01/03 01/04 01/07 01/08 01/09 Matthew  # 01/02 01/03 01/04 01/07 01/08 01/09 Matthew
 # 01/21 Matthew  # 01/21 02/05 Matthew
   
 package Apache::lonplot;  package Apache::lonplot;
   
Line 115  my $words_test     = sub {$_[0]=~s/\s+/ Line 115  my $words_test     = sub {$_[0]=~s/\s+/
 ###################################################################  ###################################################################
 my @gnuplot_edit_order =   my @gnuplot_edit_order = 
     qw/bgcolor fgcolor height width font transparent grid border align/;      qw/bgcolor fgcolor height width font transparent grid border align/;
   
   my $gnuplot_help_text = <<"ENDPLOTHELP";
   <p>
   The <b>gnuplot</b> tag allows an author to design a plot which can
   be created on the fly.  This is intended for use in homework problems
   where each student needs to see a distinct plot.  It can be used in
   conjunction with a <b>script</b> tag to generate random plots.
   </p><p>
   A <b>gnuplot</b> tag can contain the following sub-tags:
   </p>
   <dl>
   <dt> Plot Label
       <dd> Allows you to place text at a given (x,y) coordinate on the plot.
   <dt> Plot Title
       <dd> The title of the plot
   <dt> Plot Xlabel
       <dd> The label on the horizontal axis of the plot
   <dt> Plot Ylabel
       <dd> The label on the vertical axis of the plot
   <dt> Plot Axes
       <dd> allows specification of the x and y ranges displayed in the plot
   <dt> Plot Key
       <dd> Lists the functions displayed in the plot.
   <dt> Plot Curve
       <dd> Sets the data used in the plot.
   <dt> Plot Tics
       <dd> Allows specification of the x and y coordinate 'tics' on the axes.
   This is mostly used to adjust the grid lines when a grid is displayed.
   </dl>
   ENDPLOTHELP
   
 my %gnuplot_defaults =   my %gnuplot_defaults = 
     (      (
      height       => {       height       => {
Line 307  my %axis_defaults = Line 338  my %axis_defaults =
  }   }
      );       );
   
   my $curve_help_text = <<"ENDCURVEHELP";
   The <b>curve</b> tag is where you set the data to be plotted by gnuplot.
   There are two ways of entering the information:
   <dl>
       <dt> Curve Data
       <dd> Using a <b>data</b> tag you can specify the numbers used to produce 
   the plot.  
   <p>
   By default, two <b>data</b> tags will be available in a plot.  The
   first will specify X coordinates of the data and the second will
   give the Y coordinates of the data.  When working with a linestyle that 
   requires more than two data sets, inserting another <b>data</b> tag is
   required.  Unfortunately, you must make sure the <b>data</b> tags appear
   in the order gnuplot expects the data.
   </p><p>
   Specifying the data should usually be done with a perl variable or array, 
   such as \@Xdata and \@Ydata.  You may also specify numerical data seperated 
   by commas.  Again, the order of the <b>data</b> tags is important.  The
   first tag will be the X data and the second will be the Y data.
   </p>
       <dt> Curve Function
       <dd> The <b>function</b> tag allows you to specify the curve to be 
   plotted as a formula that gnuplot can understand.  Be careful using this
   tag - it is surprisingly easy to give gnuplot a function it cannot deal
   with properly.  Be explicit: 2*sin(2*3.141592*x/4) will work but
   2sin(2*3.141592x/4) will not.  If you do not receive any errors in the
   gnuplot data but still do not have an image produced, it is likely there
   is an error in your <b>function</b> tag.
   </dl>
   ENDCURVEHELP
   
 my %curve_defaults =   my %curve_defaults = 
     (      (
      color     => {       color     => {
Line 359  sub start_gnuplot { Line 421  sub start_gnuplot {
  $tagstack->[-1]);   $tagstack->[-1]);
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');   $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
    $result .= &make_javascript();
    $result .= &help_win($gnuplot_help_text);
  $result .= &edit_attributes($target,$token,\%gnuplot_defaults,   $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
     \@gnuplot_edit_order);      \@gnuplot_edit_order);
     } elsif ($target eq 'modified') {      } elsif ($target eq 'modified') {
Line 644  sub start_curve { Line 708  sub start_curve {
  push (@curves,\%curve);   push (@curves,\%curve);
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  $result .= &Apache::edit::tag_start($target,$token,'Curve');   $result .= &Apache::edit::tag_start($target,$token,'Curve');
    $result .= &help_win($curve_help_text);
  $result .= &edit_attributes($target,$token,\%curve_defaults);   $result .= &edit_attributes($target,$token,\%curve_defaults);
     } elsif ($target eq 'modified') {      } elsif ($target eq 'modified') {
  my $constructtag=&Apache::edit::get_new_args   my $constructtag=&Apache::edit::get_new_args
Line 1122  sub insert_data { Line 1187  sub insert_data {
 }  }
   
 ##----------------------------------------------------------------------  ##----------------------------------------------------------------------
   # Javascript functions to display help for tags
   
   sub make_javascript {
       my $helpwindowwidth  = 400;
       my $helpwindowheight = 400;
       my $result = '';
       $result.=<<"ENDFUNCTION";
   <script language="JavaScript">
   function openWin(text)
   {
     newWin = open("", "new_W", "width=$helpwindowwidth,height=$helpwindowheight,resizable=1,scrollbars=1");
     newWin.document.open("text/html", "replace");
     newWin.document.writeln(text);
     newWin.document.writeln('<center><a href=\"javascript:window.close()\">close this window</a></center>');
     newWin.document.close();
   }
   </script>
   ENDFUNCTION
       return $result;
   }
   
   sub help_win {
       my ($helptext)=@_;
       $helptext =~ s/\n/ /g;
       $helptext =~ s/\'/\\\'/g;
       my $result = '';
       $result.=<<"ENDWIN";
   <table width="100%"><tr><td align="right">
   <a href="javascript:openWin('$helptext')">help</a>
   </td></tr></table><hr />
   ENDWIN
       return $result;
   }
   ##----------------------------------------------------------------------
 1;  1;
 __END__  __END__
   
Removed from v.1.47  
changed lines
  Added in v.1.48

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