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Embedding Matplotlib in wxpython wx.Panel problem

P: n/a
Hi,

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
matplotlib?

Any help would be appreciated!

Thanks,
Soren

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.numerix import arange, sin, cos, pi
import matplotlib

matplotlib.use('WXAgg')
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg
from matplotlib.backends.backend_wx import NavigationToolbar2Wx
from matplotlib.figure import Figure
matplotlib.interactive(False)

class App(wx.App):

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

return True

class MainFrame(wx.Frame):

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

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

bPanel = ButtonPanel(self, 100,500, (200,100)) # button
panel

sizer = wx.BoxSizer(wx.VERTICAL)

sizer.Add(pPanel,0)
sizer.Add(bPanel,0)

self.SetSizer(sizer)

class ButtonPanel(wx.Panel):

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

pos = (xPos, yPos)
wx.Panel.__init__(self, Parent, -1, pos, style =
wx.RAISED_BORDER, size = insize)

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

class NoRepaintCanvas(FigureCanvasWxAgg):
"""We subclass FigureCanvasWxAgg, 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):
FigureCanvasWxAgg.__init__(self, *args, **kwargs)
self._drawn = 0

def _onPaint(self, evt):
"""
Called when wxPaintEvt is generated
"""
if not self._isRealized:
self.realize()

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

self.gui_repaint(drawDC=wx.PaintDC(self))
class PlotPanel(wx.Panel):

def __init__(self, parent, id = -1, color = None,\
dpi = None, style = wx.NO_FULL_REPAINT_ON_RESIZE,
**kwargs):

wx.Panel.__init__(self, parent, id = id, style = style,
**kwargs)

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

self.Bind(wx.EVT_IDLE, self._onIdle)
self.Bind(wx.EVT_SIZE, self._onSize)

self._SetSize()

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.plot(x,y, '-r')

def _onSize(self, event):
self._resizeflag = True

def _onIdle(self, evt):
if self._resizeflag:
self._resizeflag = False
self._SetSize()
self.draw()

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.GetClientSize()
self.canvas.SetSize(pixels)
self.figure.set_figsize_inches(pixels[0]/
self.figure.get_dpi(),
pixels[1]/self.figure.get_dpi())
if __name__ == "__main__":

app = App(0)
app.MainLoop()

Apr 25 '07 #1
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