Hi, this is some *really* beginner Python stuff, hope you folks could help
me.
I've been trying to make basic plots (line graphs) using the pyplot module
(wx.lib.plot) in wxPython. So far, so good. To start, I can use a class
like this (adapted from a demo) to draw a pre-defined graph:
class PlotPanel(wx.lib.plot.PlotCanvas):
def __init__(self, *args, **kwargs):
wx.lib.plot.PlotCanvas.__init__(self, *args, **kwargs)
#PlotCanvas on which I draw graph
self.Draw(self._drawGraph())
#draw it using the next function
def _drawGraph(self): #this
function draws just this one specific graph
points = [(1,1), (3,4), (5,7), (7,14)] #just four points
for a simple little line graph
m=[]
m.append(wx.lib.plot.PolyLine(points)) #uses the
points to make a line
m.append(wx.lib.plot.PolyMarker(points)) #uses the
points to place markers
return wx.lib.plot.PlotGraphics(m, "Graph Title", #return the
whole graph with title, etc.
"x axis", "y axis")
This makes a nice graph, but the problem is that doing it this way means I
need a seperate class for every graph I would want to make. Obviously not
the way to do it.
What I want instead is a way to have a class that makes my graphs but which
expects to be passed points from some other place, in my case, due to some
user choice (in selecting data from a list or whatever).
I get the sense that the idea is to pass a list of points to the drawGraph
function. Is that right? So far I've fooled with it but can't get it to
work. Mostly because I don't understand argument passing well at all (like
the *args, **kwargs stuff is still mysterious to me). I was hoping this
could help touch on some good principles for how to do this type of argument
passing generally.
Thank you,
Che
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