gnuplot development

More details on the splot issue:

the following commands:

set label 1 "Click here" at 2,2,2
set label 1 href "http://gnuplot.sourceforge.net"
splot ...

generate only the following lines in the svg output:

<g transform="translate(300.0,188.4)" style="stroke:none;
fill:black; font-family:arial; font-size:11.00pt; text-anchor:start">
<text><tspan>Click here</tspan>
</text>
</g>


whereas the same 'set label' commands followed by 'plot' instead of
'splot' yield the same lines within
<a xlink:...> </a>:

<a xlink:href="http://gnuplot.projects.sourceforge.net">
<g transform="translate(318.9,212.3)" style="stroke:none;
fill:black; font-family:arial; font-size:11.00pt; text-anchor:start">
<text><tspan>Click me!</tspan>
</text>
</g>
</a>

Thus, the link does not appear when using splot.

Perfect. Thank you very much. Incidentally, I note while href works as
expected with plot, I cannot make it work for me when using splot. Is this
intentional? Mousing over an SVG splot output, I notice that the cursor
changes shape, but does not link to anything.

I don't know what caused your error message, but I've attached an updated
version of the patch that applies cleanly to current CVS.

My attempt to patch gnuplot 4.3.0 with href_16dec2008.patch failed ...
would appreciate any guidance.

graphics.c: In function `place_labels':
graphics.c:1433: error: structure has no member named `href'
graphics.c:1434: error: structure has no member named `href'
graphics.c: In function `place_objects':
graphics.c:1470: error: structure has no member named `href'
graphics.c:1471: error: structure has no member named `href'
graphics.c:1544: error: structure has no member named `href'

File Added: href_16dec2008.patch

Updated and added to demo web page
File Added: href_28nov2008.patch

Modified to handle svg both with and without enhanced text mode
File Added: href_20oct2008.patch

And here is a sample output pdf file created using
set term epslatex color standalone
set output 'hyper.tex'
load 'hyper.dem'

I then edited the output TeX file to include the following line:
\usepackage[pdftex,colorlinks,baseurl=http://mysite]{hyperref}

and ran
convert hyper-inc.eps hyper-inc.pdf
pdflatex hyper

Note that when this same demo file is run through the svg terminal, all
elements in each individual plot trigger the hyperlink. But in epslatex,
only the text elements are processed by LaTeX and so only the plot titles
are connected to the hyperlink.
File Added: hyper.pdf

This version adds support for hyperlinks in the epslatex terminal driver.
File Added: href_17oct2008.patch