embedding_in_wx4.py

非原创。很好的python例子

#!/usr/bin/env python
"""
An example of how to use wx or wxagg in an application with a custom
toolbar
"""

from matplotlib.numerix import arange, sin, pi

import matplotlib

# uncomment the following to use wx rather than wxagg
#matplotlib.use('WX')
#from matplotlib.backends.backend_wx import FigureCanvasWx as FigureCanvas

# comment out the following to use wx rather than wxagg
matplotlib.use('WXAgg')
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas
from matplotlib.backends.backend_wxagg import NavigationToolbar2WxAgg 

from matplotlib.backends.backend_wx import _load_bitmap
from matplotlib.figure import Figure
from matplotlib.numerix.mlab import rand

from wxPython.wx import *

class MyNavigationToolbar(NavigationToolbar2WxAgg):
    """
    Extend the default wx toolbar with your own event handlers
    """
    ON_CUSTOM = wxNewId()
    def __init__(self, canvas, cankill):
        NavigationToolbar2WxAgg.__init__(self, canvas)

        # for simplicity I'm going to reuse a bitmap from wx, you'll
        # probably want to add your own.
        self.AddSimpleTool(self.ON_CUSTOM, _load_bitmap('stock_left.xpm'),
                           'Click me', 'Activate custom contol')
        EVT_TOOL(self, self.ON_CUSTOM, self._on_custom)

    def _on_custom(self, evt):
        # add some text to the axes in a random location in axes (0,1)
        # coords) with a random color

        # get the axes
        ax = self.canvas.figure.axes[0]

        # generate a random location can color
        x,y = tuple(rand(2))
        rgb = tuple(rand(3))

        # add the text and draw
        ax.text(x, y, 'You clicked me',
                transform=ax.transAxes,
                color=rgb)
        self.canvas.draw()
        evt.Skip()


class CanvasFrame(wxFrame):
    
    def __init__(self):
        wxFrame.__init__(self,None,-1,
                         'CanvasFrame',size=(550,350))

        self.SetBackgroundColour(wxNamedColor("WHITE"))

        self.figure = Figure(figsize=(5,4), dpi=100)
        self.axes = self.figure.add_subplot(111)
        t = arange(0.0,3.0,0.01)
        s = sin(2*pi*t)
        
        self.axes.plot(t,s)

        self.canvas = FigureCanvas(self, -1, self.figure)

        self.sizer = wxBoxSizer(wxVERTICAL)
        self.sizer.Add(self.canvas, 1, wxTOP | wxLEFT | wxEXPAND)
        # Capture the paint message        
        EVT_PAINT(self, self.OnPaint)        

        self.toolbar = MyNavigationToolbar(self.canvas, True)
        self.toolbar.Realize()
        if wxPlatform == '__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(wxSize(fw, th))
            self.sizer.Add(self.toolbar, 0, wxLEFT | wxEXPAND)

        # update the axes menu on the toolbar
        self.toolbar.update()  
        self.SetSizer(self.sizer)
        self.Fit()


    def OnPaint(self, event):
        self.canvas.draw()
        event.Skip()
        
class App(wxApp):
    
    def OnInit(self):
        'Create the main window and insert the custom frame'
        frame = CanvasFrame()
        frame.Show(true)

        return true

app = App(0)
app.MainLoop()