version 1.47, 2002/02/05 15:05:44
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version 1.50, 2002/02/27 16:54:58
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# 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 02/06 Matthew |
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package Apache::lonplot; |
package Apache::lonplot; |
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Line 115 my $words_test = sub {$_[0]=~s/\s+/
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Line 115 my $words_test = sub {$_[0]=~s/\s+/
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################################################################### |
################################################################### |
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/; |
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my $gnuplot_help_text = <<"ENDPLOTHELP"; |
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<p> |
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The <b>gnuplot</b> tag allows an author to design a plot which can |
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be created on the fly. This is intended for use in homework problems |
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where each student needs to see a distinct plot. It can be used in |
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conjunction with a <b>script</b> tag to generate random plots. |
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</p><p> |
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A <b>gnuplot</b> tag can contain the following sub-tags: |
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</p> |
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<dl> |
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<dt> Plot Label |
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<dd> Allows you to place text at a given (x,y) coordinate on the plot. |
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<dt> Plot Title |
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<dd> The title of the plot |
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<dt> Plot Xlabel |
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<dd> The label on the horizontal axis of the plot |
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<dt> Plot Ylabel |
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<dd> The label on the vertical axis of the plot |
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<dt> Plot Axes |
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<dd> allows specification of the x and y ranges displayed in the plot |
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<dt> Plot Key |
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<dd> Lists the functions displayed in the plot. |
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<dt> Plot Curve |
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<dd> Sets the data used in the plot. |
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<dt> Plot Tics |
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<dd> Allows specification of the x and y coordinate 'tics' on the axes. |
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This is mostly used to adjust the grid lines when a grid is displayed. |
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</dl> |
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ENDPLOTHELP |
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my %gnuplot_defaults = |
my %gnuplot_defaults = |
( |
( |
height => { |
height => { |
Line 307 my %axis_defaults =
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Line 338 my %axis_defaults =
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} |
} |
); |
); |
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my $curve_help_text = <<"ENDCURVEHELP"; |
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The <b>curve</b> tag is where you set the data to be plotted by gnuplot. |
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There are two ways of entering the information: |
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<dl> |
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<dt> Curve Data |
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<dd> Using a <b>data</b> tag you can specify the numbers used to produce |
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the plot. |
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<p> |
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By default, two <b>data</b> tags will be available in a plot. The |
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first will specify X coordinates of the data and the second will |
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give the Y coordinates of the data. When working with a linestyle that |
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requires more than two data sets, inserting another <b>data</b> tag is |
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required. Unfortunately, you must make sure the <b>data</b> tags appear |
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in the order gnuplot expects the data. |
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</p><p> |
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Specifying the data should usually be done with a perl variable or array, |
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such as \@Xdata and \@Ydata. You may also specify numerical data seperated |
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by commas. Again, the order of the <b>data</b> tags is important. The |
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first tag will be the X data and the second will be the Y data. |
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</p> |
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<dt> Curve Function |
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<dd> The <b>function</b> tag allows you to specify the curve to be |
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plotted as a formula that gnuplot can understand. Be careful using this |
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tag - it is surprisingly easy to give gnuplot a function it cannot deal |
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with properly. Be explicit: 2*sin(2*3.141592*x/4) will work but |
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2sin(2*3.141592x/4) will not. If you do not receive any errors in the |
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gnuplot data but still do not have an image produced, it is likely there |
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is an error in your <b>function</b> tag. |
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</dl> |
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ENDCURVEHELP |
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my %curve_defaults = |
my %curve_defaults = |
( |
( |
color => { |
color => { |
Line 359 sub start_gnuplot {
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Line 421 sub start_gnuplot {
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$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,$token,'GnuPlot'); |
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$result .= &make_javascript(); |
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$result .= &help_win($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 500 sub start_title {
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Line 564 sub start_title {
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my $result=''; |
my $result=''; |
if ($target eq 'web') { |
if ($target eq 'web') { |
$title = &Apache::lonxml::get_all_text("/title",$$parser[-1]); |
$title = &Apache::lonxml::get_all_text("/title",$$parser[-1]); |
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$title =~ s/\n/ /g; |
if (length($title) > $max_str_len) { |
if (length($title) > $max_str_len) { |
$title = substr($title,0,$max_str_len); |
$title = substr($title,0,$max_str_len); |
} |
} |
Line 532 sub start_xlabel {
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Line 597 sub start_xlabel {
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my $result=''; |
my $result=''; |
if ($target eq 'web') { |
if ($target eq 'web') { |
$xlabel = &Apache::lonxml::get_all_text("/xlabel",$$parser[-1]); |
$xlabel = &Apache::lonxml::get_all_text("/xlabel",$$parser[-1]); |
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$xlabel =~ s/\n/ /g; |
if (length($xlabel) > $max_str_len) { |
if (length($xlabel) > $max_str_len) { |
$xlabel = substr($xlabel,0,$max_str_len); |
$xlabel = substr($xlabel,0,$max_str_len); |
} |
} |
Line 565 sub start_ylabel {
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Line 631 sub start_ylabel {
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my $result=''; |
my $result=''; |
if ($target eq 'web') { |
if ($target eq 'web') { |
$ylabel = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]); |
$ylabel = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]); |
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$ylabel =~ s/\n/ /g; |
if (length($ylabel) > $max_str_len) { |
if (length($ylabel) > $max_str_len) { |
$ylabel = substr($ylabel,0,$max_str_len); |
$ylabel = substr($ylabel,0,$max_str_len); |
} |
} |
Line 601 sub start_label {
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Line 668 sub start_label {
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&get_attributes(\%label,\%label_defaults,$parstack,$safeeval, |
&get_attributes(\%label,\%label_defaults,$parstack,$safeeval, |
$tagstack->[-1]); |
$tagstack->[-1]); |
my $text = &Apache::lonxml::get_all_text("/label",$$parser[-1]); |
my $text = &Apache::lonxml::get_all_text("/label",$$parser[-1]); |
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$text =~ s/\n/ /g; |
$text = substr($text,0,$max_str_len) if (length($text) > $max_str_len); |
$text = substr($text,0,$max_str_len) if (length($text) > $max_str_len); |
$label{'text'} = $text; |
$label{'text'} = $text; |
push(@labels,\%label); |
push(@labels,\%label); |
Line 644 sub start_curve {
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Line 712 sub start_curve {
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push (@curves,\%curve); |
push (@curves,\%curve); |
} elsif ($target eq 'edit') { |
} elsif ($target eq 'edit') { |
$result .= &Apache::edit::tag_start($target,$token,'Curve'); |
$result .= &Apache::edit::tag_start($target,$token,'Curve'); |
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$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 $constructtag=&Apache::edit::get_new_args |
Line 720 sub start_data {
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Line 789 sub start_data {
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$datatext = &Apache::run::run('return "'.$datatext.'"', |
$datatext = &Apache::run::run('return "'.$datatext.'"', |
$safeeval,1); |
$safeeval,1); |
} |
} |
$datatext =~ s/\s+/ /g; |
$datatext =~ s/\s+/ /g; |
# Need to do some error checking on the @data array - |
# Need to do some error checking on the @data array - |
# make sure it's all numbers and make sure each array |
# make sure it's all numbers and make sure each array |
# is of the same length. |
# is of the same length. |
Line 1020 sub edit_attributes {
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Line 1089 sub edit_attributes {
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sub insert_gnuplot { |
sub insert_gnuplot { |
my $result = ''; |
my $result = ''; |
# plot attributes |
# plot attributes |
$result .= "<plot \n"; |
$result .= "<gnuplot \n"; |
foreach my $attr (keys(%gnuplot_defaults)) { |
foreach my $attr (keys(%gnuplot_defaults)) { |
$result .= " $attr=\"$gnuplot_defaults{$attr}->{'default'}\"\n"; |
$result .= " $attr=\"$gnuplot_defaults{$attr}->{'default'}\"\n"; |
} |
} |
Line 1032 sub insert_gnuplot {
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Line 1101 sub insert_gnuplot {
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# $result .= &insert_xlabel(); |
# $result .= &insert_xlabel(); |
# $result .= &insert_ylabel(); |
# $result .= &insert_ylabel(); |
$result .= &insert_curve(); |
$result .= &insert_curve(); |
# close up the <plot> |
# close up the <gnuplot> |
$result .= "</plot>\n"; |
$result .= "</gnuplot>\n"; |
return $result; |
return $result; |
} |
} |
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Line 1122 sub insert_data {
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Line 1191 sub insert_data {
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} |
} |
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##---------------------------------------------------------------------- |
##---------------------------------------------------------------------- |
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# Javascript functions to display help for tags |
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sub make_javascript { |
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my $helpwindowwidth = 400; |
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my $helpwindowheight = 400; |
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my $result = ''; |
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$result.=<<"ENDFUNCTION"; |
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<script language="JavaScript"> |
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function openWin(text) |
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{ |
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newWin = open("", "new_W", "width=$helpwindowwidth,height=$helpwindowheight,resizable=1,scrollbars=1"); |
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newWin.document.open("text/html", "replace"); |
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newWin.document.writeln(text); |
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newWin.document.writeln('<center><a href=\"javascript:window.close()\">close this window</a></center>'); |
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newWin.document.close(); |
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} |
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</script> |
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ENDFUNCTION |
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return $result; |
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} |
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sub help_win { |
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my ($helptext)=@_; |
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$helptext =~ s/\n/ /g; |
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$helptext =~ s/\'/\\\'/g; |
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my $result = ''; |
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$result.=<<"ENDWIN"; |
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<table width="100%"><tr><td align="right"> |
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<a href="javascript:openWin('$helptext')">help</a> |
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</td></tr></table><hr /> |
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ENDWIN |
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return $result; |
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} |
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##---------------------------------------------------------------------- |
1; |
1; |
__END__ |
__END__ |
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