[PyX-devel] [ pyx-Patches-861999 ] Graph Baseline Fixes

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Patches item #861999, was opened at 2003-12-17 17:18
Message generated for change (Comment added) made by malkerei
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Graph Baseline Fixes

Initial Comment:
For PyX version 0.4.1

text.py:
        Add pdftex.map to the font list
        Increases tex timeout to 120

graph.py:
        Makes it so that axispainter can have a axis line 
painted at a value other than 0 (such as 1)
        Adds named parameter axiszeroline to 
graph.axispainter constructor.

        Allows bars to be graph from from a centerline other 
than 0 (such as 1)
        Adds named parameter baseline to graph.bar 
constructor



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Comment By: Matthew Bridges (malkerei)
Date: 2003-12-22 18:31

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First, thanks for the quick comments.  

In response to your comments, we didn't check the mailing 
archives before submitting the patch, so we didn't realize a better 
fix was already in CVS for the pdftex and timeout issues.

As for the baseline change, we kept fromzero around for 
backwards compatability, as we weren't sure how willing to break 
it you were.  Your way is how we wanted to do it.

Lastly, since there is already a parameter zerolineattrs specifically 
for the zero line, you've already made the 0 line special.  Why not 
make it a little more general and allow the line to be anywhere.

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Comment By: André Wobst (wobsta)
Date: 2003-12-19 06:18

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There are several topics addressed in your patch. Let be briefly 
comment them:

The font map problem was addressed in CVS already. There is an 
option to add further map files within our PyX script. Additionally, 
you can specify map files in a ~/.pyxrc file (and a /etc/pyxrc 
IIRC). We're quite happy about that now and using psfonts.map as 
the default like dvips. Why should we change that (you may use 
the udpmap script to properly setup your psfonts.map)?

About the timeout: We had some discussion about that some time 
ago. The problem with a long timeout is, that the user might think, 
that the hole system hangs, while its just waiting for TeX. Its easy 
relatively easy to get into such a state (if you want to). Try:
    from pyx import *
    text.preamble(r"\def\PyXInput#1{}")
(Of course, nobody wants to do that, but there might be cases, 
where it is much more tricky.) However, there was a good solution 
suggested in a previous discussion, which is implemented in CVS 
now. See http://sourceforge.net/mailarchive/message.php?
msg_id=6332068.

About the zeroline I'm not sure, if this is really needed. You can 
always get a grid line from the graph and stroke that. So I'm not 
sure if we really want that. You can also use spcial ticks for that 
and plot gridlines (i.e. you can draw several lines by that). For 
bars the storry is quite different. It is really a good suggestion to 
add this feature. I like it. However, could you tell me, why we 
shouldn't do it the following way: Couldn't we get rid of the 
fromzero-flag and use the baseline parameter having a value or 
None? Then the name "baseline" might be worth a discussion as 
well ... but in principle I would like to add that feature this way ... 
what do you think? Would this be fine to you or do you have a 
good reason to add the "baseline" feature to both, the axes and 
the bar style?

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