user_interfaces example code: embedding_in_wx3.py

[source code]

#!/usr/bin/env python

"""
Copyright (C) 2003-2004 Andrew Straw, Jeremy O'Donoghue and others

License: This work is licensed under the PSF. A copy should be included
with this source code, and is also available at
http://www.python.org/psf/license.html

This is yet another example of using matplotlib with wx.  Hopefully
this is pretty full-featured:

  - both matplotlib toolbar and WX buttons manipulate plot
  - full wxApp framework, including widget interaction
  - XRC (XML wxWidgets resource) file to create GUI (made with XRCed)

This was derived from embedding_in_wx and dynamic_image_wxagg.

Thanks to matplotlib and wx teams for creating such great software!

"""
from __future__ import print_function

# Used to guarantee to use at least Wx2.8
import wxversion
wxversion.ensureMinimal('2.8')

import sys, time, os, gc
import matplotlib
matplotlib.use('WXAgg')
import matplotlib.cm as cm
import matplotlib.cbook as cbook
from matplotlib.backends.backend_wxagg import Toolbar, FigureCanvasWxAgg
from matplotlib.figure import Figure
import numpy as np

import wx
import wx.xrc as xrc

ERR_TOL = 1e-5 # floating point slop for peak-detection


matplotlib.rc('image', origin='lower')

class PlotPanel(wx.Panel):

    def __init__(self, parent):
        wx.Panel.__init__(self, parent, -1)

        self.fig = Figure((5,4), 75)
        self.canvas = FigureCanvasWxAgg(self, -1, self.fig)
        self.toolbar = Toolbar(self.canvas) #matplotlib toolbar
        self.toolbar.Realize()
        #self.toolbar.set_active([0,1])

        # Now put all into a sizer
        sizer = wx.BoxSizer(wx.VERTICAL)
        # This way of adding to sizer allows resizing
        sizer.Add(self.canvas, 1, wx.LEFT|wx.TOP|wx.GROW)
        # Best to allow the toolbar to resize!
        sizer.Add(self.toolbar, 0, wx.GROW)
        self.SetSizer(sizer)
        self.Fit()

    def init_plot_data(self):
        a = self.fig.add_subplot(111)

        x = np.arange(120.0)*2*np.pi/60.0
        y = np.arange(100.0)*2*np.pi/50.0
        self.x, self.y = np.meshgrid(x, y)
        z = np.sin(self.x) + np.cos(self.y)
        self.im = a.imshow( z, cmap=cm.jet)#, interpolation='nearest')

        zmax = np.amax(z) - ERR_TOL
        ymax_i, xmax_i = np.nonzero(z >= zmax)
        if self.im.origin == 'upper':
            ymax_i = z.shape[0]-ymax_i
        self.lines = a.plot(xmax_i,ymax_i,'ko')

        self.toolbar.update() # Not sure why this is needed - ADS

    def GetToolBar(self):
        # You will need to override GetToolBar if you are using an
        # unmanaged toolbar in your frame
        return self.toolbar

    def OnWhiz(self,evt):
        self.x += np.pi/15
        self.y += np.pi/20
        z = np.sin(self.x) + np.cos(self.y)
        self.im.set_array(z)

        zmax = np.amax(z) - ERR_TOL
        ymax_i, xmax_i = np.nonzero(z >= zmax)
        if self.im.origin == 'upper':
            ymax_i = z.shape[0]-ymax_i
        self.lines[0].set_data(xmax_i,ymax_i)

        self.canvas.draw()

    def onEraseBackground(self, evt):
        # this is supposed to prevent redraw flicker on some X servers...
        pass

class MyApp(wx.App):
    def OnInit(self):
        xrcfile = cbook.get_sample_data('embedding_in_wx3.xrc', asfileobj=False)
        print('loading', xrcfile)

        self.res = xrc.XmlResource(xrcfile)

        # main frame and panel ---------

        self.frame = self.res.LoadFrame(None,"MainFrame")
        self.panel = xrc.XRCCTRL(self.frame,"MainPanel")

        # matplotlib panel -------------

        # container for matplotlib panel (I like to make a container
        # panel for our panel so I know where it'll go when in XRCed.)
        plot_container = xrc.XRCCTRL(self.frame,"plot_container_panel")
        sizer = wx.BoxSizer(wx.VERTICAL)

        # matplotlib panel itself
        self.plotpanel = PlotPanel(plot_container)
        self.plotpanel.init_plot_data()

        # wx boilerplate
        sizer.Add(self.plotpanel, 1, wx.EXPAND)
        plot_container.SetSizer(sizer)

        # whiz button ------------------

        whiz_button = xrc.XRCCTRL(self.frame,"whiz_button")
        wx.EVT_BUTTON(whiz_button, whiz_button.GetId(),
                      self.plotpanel.OnWhiz)

        # bang button ------------------

        bang_button = xrc.XRCCTRL(self.frame,"bang_button")
        wx.EVT_BUTTON(bang_button, bang_button.GetId(),
                      self.OnBang)

        # final setup ------------------

        sizer = self.panel.GetSizer()
        self.frame.Show(1)

        self.SetTopWindow(self.frame)

        return True

    def OnBang(self,event):
        bang_count = xrc.XRCCTRL(self.frame,"bang_count")
        bangs = bang_count.GetValue()
        bangs = int(bangs)+1
        bang_count.SetValue(str(bangs))

if __name__ == '__main__':
    app = MyApp(0)
    app.MainLoop()

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