Dear ALL,
Greetings. Trying to develop a desktop application for interactive
mapping using wxPython and Matplotlib, I have been doing some
experiments with embedding maps generated by the Basemap module into a
wxPython frame.
Although there are many nice exemples of using Matplotlib graphs in
wxWpython and other GUI frontends, I could not find any examples of
doing this with the Basemap module.
As a quick start, I put together the the code below (adapted from one
of the examples available in the Matplotlib website):
--
#!/usr/bin/env python
import matplotlib
import matplotlib.pyplot
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas
from matplotlib.backends.backend_wx import NavigationToolbar2Wx
from matplotlib.figure import Figure
from mpl_toolkits.basemap import Basemap
from wx import *
class CanvasFrame(Frame):
def __init__(self):
Frame.__init__(self,None,-1,
'CanvasFrame',size=(550,350))
self.SetBackgroundColour(NamedColor("WHITE"))
self.figure = Figure()
self.canvas = FigureCanvas(self, -1, self.figure)
self.sizer = BoxSizer(VERTICAL)
self.sizer.Add(self.canvas, 1, LEFT | TOP | GROW)
self.SetSizer(self.sizer)
self.Fit()
self.add_toolbar() # comment this out for no toolbar
# This functions plots the Basemap
self.plot_map()
def add_toolbar(self):
self.toolbar = NavigationToolbar2Wx(self.canvas)
self.toolbar.Realize()
if Platform == '__WXMAC__':
# Mac platform (OSX 10.3, MacPython) does not seem to
cope with
# having a toolbar in a sizer. This work-around gets
the buttons
# back, but at the expense of having the toolbar at the
top
self.SetToolBar(self.toolbar)
else:
# On Windows platform, default window size is
incorrect, so set
# toolbar width to figure width.
tw, th = self.toolbar.GetSizeTuple()
fw, fh = self.canvas.GetSizeTuple()
# By adding toolbar in sizer, we are able to put it at
the bottom
# of the frame - so appearance is closer to GTK version.
# As noted above, doesn't work for Mac.
self.toolbar.SetSize(Size(fw, th))
self.sizer.Add(self.toolbar, 0, LEFT | EXPAND)
# update the axes menu on the toolbar
self.toolbar.update()
def plot_map(self):
map = Basemap()
map.drawcoastlines()
map.drawcountries()
map.drawmapboundary()
map.fillcontinents(color='lime', lake_color='aqua')
map.drawmapboundary(fill_color='aqua')
matplotlib.pyplot.show()
class App(App):
def OnInit(self):
'Create the main window and insert the custom frame'
frame = CanvasFrame()
frame.Show(True)
return True
app = App(0)
app.MainLoop()
--
Well, the above code works, but notice that after the Basemap plot is
displayed on a usual plotting window, *another*, blank, plotting
window appears! Can anyone figure out how to avoid that?
Another problem is that the instruction
"self.canvas.print_figure('test.png',dpi=100)", if used in place of
matplotlib.pyplot.show() method, has not effect and no figure is
written to disk.
Also, a call to method "self.canvas.draw()" has not effect, either.
Any hints?
Thanks in advance for any assistance you can provide.
With best regards,
--
Dr. Mauro J. Cavalcanti
Ecoinformatics Studio
P.O. Box 46521, CEP 20551-970
Rio de Janeiro, RJ, BRASIL
E-mail: [EMAIL PROTECTED]
Web: http://studio.infobio.net
Linux Registered User #473524 * Ubuntu User #22717
"Life is complex. It consists of real and imaginary parts."
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