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Embedding Matplotlib in wxpython wx.Panel problem


I'm trying to create a small GUI program where I can do plots using
Matplotlib. I've been trying to borrow code from the examples at the
matplotlib website, but I can't get it to work.

I want to be able to create a wx.Panel that contains an axis for
plotting. Around it i want other panels containing various settings,
buttons etc. to control the plot. So far I can't even get the program
to actually show a plot in a panel.

Does anyone here have experience in making a wxpython GUI with

Any help would be appreciated!


My code shows a frame, and I'm trying to set up two panels.. one with
a plot and one with a button.. The plotpanel is just a little square
in the corner when I run it.. ???

My code is as follows:

import wx
import pylab
from matplotlib.nume rix import arange, sin, cos, pi
import matplotlib

matplotlib.use( 'WXAgg')
from matplotlib.back ends.backend_wx agg import FigureCanvasWxA gg
from matplotlib.back ends.backend_wx import NavigationToolb ar2Wx
from matplotlib.figu re import Figure
matplotlib.inte ractive(False)

class App(wx.App):

def OnInit(self):
self.frame = MainFrame("Auto plotter", (50,60), (700,700))
self.frame.Show ()

return True

class MainFrame(wx.Fr ame):

def __init__(self, title, pos, size):
wx.Frame.__init __(self, None, -1, title, pos, size)

pPanel = PlotPanel(self, -1) # Plot panel

bPanel = ButtonPanel(sel f, 100,500, (200,100)) # button

sizer = wx.BoxSizer(wx. VERTICAL)

sizer.Add(pPane l,0)
sizer.Add(bPane l,0)

self.SetSizer(s izer)

class ButtonPanel(wx. Panel):

def __init__(self, Parent, xPos, yPos, insize):

pos = (xPos, yPos)
wx.Panel.__init __(self, Parent, -1, pos, style =
wx.RAISED_BORDE R, size = insize)

button = wx.Button(self, -1, 'HELLO!!', (10,10), (150,50))

class NoRepaintCanvas (FigureCanvasWx Agg):
"""We subclass FigureCanvasWxA gg, overriding the _onPaint method,
so that
the draw method is only called for the first two paint events.
After that,
the canvas will only be redrawn when it is resized.
def __init__(self, *args, **kwargs):
FigureCanvasWxA gg.__init__(sel f, *args, **kwargs)
self._drawn = 0

def _onPaint(self, evt):
Called when wxPaintEvt is generated
if not self._isRealize d:

if self._drawn < 2:
self.draw(repai nt = False)
self._drawn += 1

self.gui_repain t(drawDC=wx.Pai ntDC(self))
class PlotPanel(wx.Pa nel):

def __init__(self, parent, id = -1, color = None,\
dpi = None, style = wx.NO_FULL_REPA INT_ON_RESIZE,

wx.Panel.__init __(self, parent, id = id, style = style,

self.figure = Figure(None, dpi)
self.canvas = NoRepaintCanvas (self, -1, self.figure)
self._resizefla g = True

self.Bind(wx.EV T_IDLE, self._onIdle)
self.Bind(wx.EV T_SIZE, self._onSize)


def draw(self): # just draw something!
if not hasattr(self, 'subplot'):
self.subplot = self.figure.add _subplot(111)
theta = arange(0, 45*2*pi, 0.02)
rad = (0.8*theta/(2*pi)+1)
r = rad*(8 + sin(theta*7+rad/1.8))
x = r*cos(theta)
y = r*sin(theta)
#Now draw it
self.subplot.pl ot(x,y, '-r')

def _onSize(self, event):
self._resizefla g = True

def _onIdle(self, evt):
if self._resizefla g:
self._resizefla g = False

def _SetSize(self, pixels = None):
This method can be called to force the Plot to be a desired
size, which defaults to
the ClientSize of the panel
if not pixels:
pixels = self.GetClientS ize()
self.canvas.Set Size(pixels)
self.figure.set _figsize_inches (pixels[0]/
self.figure.get _dpi(),
pixels[1]/self.figure.get _dpi())
if __name__ == "__main__":

app = App(0)

Apr 25 '07 #1
0 1942

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