On 08/23/2010 11:08 AM, Daniel Hyams wrote:
Thanks for your response Michael!
Deleting the fontList.cache indeed solved the problem. The first
sample that I gave below now works fine under both Windows and Linux;
whew...I would have never known about that cache file without your help.
So, should the fontList.cache file be deleted each time my app runs,
in case new fonts have been installed since the last invocation? How
do we keep that cache up to date?
The cache exists because it can take a long time to read through all of
the font files on the system each time matplotlib is imported. It might
be fast enough to simply stat the dates on all the files in the font
directories (without reading their contents)... I don't know if
experiments were done on this when the cache was originally added (that
pre-dates me).
Mike
On Mon, Aug 23, 2010 at 10:12 AM, Michael Droettboom <md...@stsci.edu
<mailto:md...@stsci.edu>> wrote:
On 08/22/2010 10:00 PM, Daniel Hyams wrote:
I am searching for advice on how to handle selecting a specific
font, and using that in a matplotlib figure. As a background,
the font will be picked through the wx.FontDialog (common font
dialog) provided by wxPython. So, what I will have is the font
face (Arial, Times New Roman, Algerian, etc. etc.), the weight,
the style (italic, normal) and the point size. All I want to do
is create a matplotlib font that matches this, and use it in the
plot. My first try was this:
import matplotlib.pyplot as plt
import matplotlib.font_manager as fm
# this does not work. The title font is wrong.
the_font = 'Century Schoolbook'
fp = fm.FontProperties()
fp.set_name(the_font)
fp.set_size(24)
plt.title('The Title that should be in Century
Schoolbook',fontproperties=fp)
print fp
plt.show()
But that didn't work. I know that "Century Schoolbook" is not
really a font family, but in the docs it says that you can list a
font there.
On my RHEL5 system (at least), the full name of that font is
"Century Schoolbook L". You do, of course, have to match the font
name exactly.
You may want to experiment with using wx.Font.GetFaceName vs.
wx.Font.GetFamilyString from the font chooser dialog and see if
either returns the correct result.
You can see the list of fonts that matplotlib found on your system
by doing:
from matplotlib import font_manager
font_manager.fontManager.ttflist
(This is not a public API -- but may help with debugging the issue
here).
Is the font you are hoping to match with in that list?
Another thing you may want to try is deleting matplotlib's font
cache, in case this font was installed after matplotlib was first
run on your system. It is is in a file "fontList.cache" and lives
in the user data area (can't remember the exact location of this
on Windows off hand).
The following does work, if I manually set the TrueType file
explicitly:
fp = fm.FontProperties()
fp.set_file('c:\\Windows\Fonts\CENSCBK.TTF')
fp.set_size(24)
print fp
plt.title('The Title that is in Century
Schoolbook',fontproperties=fp)
plt.show()
So I guess the question is....how does one accomplish this,
portably? I don't quite understand the ins and outs of fonts.....
p.s.
I did take a stab at creating a mapping between the font names /
weights / styles like this:
all_fontfiles = fm.win32InstalledFonts()
allfonts = fm.createFontList(all_fontfiles)
fontdict = {}
for f in allfonts:
fontdict[(f.name <http://f.name>,f.style,f.weight)] = f.fname
And I think I can get this to work, because this maps me to a TTF
file for any name, style, and weight combination. But this
seemed awfully hacky, and I don't know what problems I'll run
into on other platforms (obviously, I would have get
all_fontfiles above differently on each platform). If this is
the only way to do it, I guess that's OK, but I thought that
surely there was a better way.
That's basically a stricter way of doing what the matplotlib code
already does. The matplotlib lookup is actually smarter because
it handles approximate "nearest neighbor" matches. I think the
problem is more likely one of the above (an inexact name match or
an out-of-date font cache).
Mike
--
Michael Droettboom
Science Software Branch
Space Telescope Science Institute
Baltimore, Maryland, USA
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