Barcode Layout
John Hunter
jdhunter at ace.bsd.uchicago.edu
Mon Aug 9 09:18:09 EDT 2004
>>>>> "Aaron" == Aaron Bingham <bingham at cenix-bioscience.com> writes:
Aaron> One thing about piddle that's a good fit for our needs is
Aaron> that we can add methods to the canvases e.g. drawBarcode()
Aaron> just by adding that method to our backends. Is there any
Aaron> easy way to add such high-level drawing commands in
Aaron> matlibplot that are passed down to the backend level?
It is certainly possible - it is easy to access the figure canvas and
then call canvas.whatever(). Here is a brief example
import matplotlib
matplotlib.use('MyBackend')
from matplotlib.matlab import *
# issue some plot commands; these will render to your backend
plot(blah, blah)
# this is the MyBackend canvas, which derives from
# matplotlib.backend_bases.FigureCanvas
canvas = get_current_fig_manager().canvas
canvas.my_special_method() # do some custom rendering
Whether this is desirable is another question, because then the output
will be backend specific. I would encourage you, where possible, to
design the barcodes using matplotlib primitives in a function or
class, and then any backend will render them the same.
JDH
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