On Thursday 08 June 2006 16:19, massimo sandal wrote:
> Brian Blais ha scritto:
> > I want to write a wxPython script to pull up pylab plots (in a separate
> > window), based on menu or button choices. The script below crashes with
> > a segmentation fault. Am I doing something wrong here? Is there a
> > workaround or fix?
>
> As far as I know, mixing wxpython and pylab this way is BAD.
>
> You should better choose between:
> - (1)Launch pylab in a separate thread
> - (2) (What I do) Using WxMPL and embedding a matplotlib plot in a
> wxPanel or wxFrame. You have to use the OO interface to matplotlib.
>
> m.
Hi,
Agree with massimo. One brief example might help:
import matplotlib
matplotlib.use('WXAgg')
from pylab import gca
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as
FigureCanvas
from matplotlib.font_manager import fontManager, FontProperties
from matplotlib.figure import Figure
from matplotlib.axes import Subplot
import matplotlib.numerix as numpy
from matplotlib.ticker import LogLocator, MultipleLocator
from matplotlib import rcParams
import wx
<snip>
class Your_Class(wx.Frame):
def __init__(self,parent,id,title):
wx.Frame.__init__(self,None,-1,"Your_Title")
<snip>
self.fig = Figure(figsize=(7,5),dpi=100)
self.axes = self.fig.add_subplot(111)
self.canvas = FigureCanvas(self, -1, self.fig)
self.parent = self.canvas.GetParent()
self.canvas.mpl_connect('motion_notify_event',self.mouse_move)
<snip: SomeSizer>
SomeSizer.add(self.canvas, 1, wx.LEFT|wx.TOP|wx.GROW|wx.EXPAND)
#useful method examples:
def OnRefresh(self,event=None):
"""
refreshes the plotting window
"""
self.canvas.draw()
self.toolbar.update()
#then the actual drawing function:
def plot_data(self):
"""
actual plotting function
"""
raw_plot(self) #imported own function, see below
self.toolbar.update() #not necesarry, but might help
def raw_plot(parent):
# note that all meta data / parameters from the parent are accessible !
# e.g. color = parent.color
parent.fig.clear()
a = parent.fig.add_subplot(211)
etc. etc. etc.
Thought this might be helpful to get started. You might want to write things a
different way, though. Particularly the my application is a bit more than
just a short script, so feel free to drop anything you don't want.
One last thing: I'd recommend having a look at the matplotlib examples
('embedding_in_wx*.py').
Cheers,
Christian
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