wxPythonとmatplotlibを使用して定期描画

wxpython_with_matplotlib.py

# -*- coding: utf-8 -*-

import matplotlib
matplotlib.interactive(True)
matplotlib.use('WXAgg')

import wx

from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg
from matplotlib.figure import Figure
import numpy as np

class myWxPlot(wx.Panel):
    def __init__(self, parent):
        self.parent = parent
        wx.Panel.__init__(self, parent)
        
        self.lastplot = None

        #matplotlib figure
        self.figure = Figure(None)
        self.figure.set_facecolor((0.9, 0.9, 1.))
        self.subplot = self.figure.add_subplot(111)
        #canvas
        self.canvas = FigureCanvasWxAgg(self, -1, self.figure)
        self.canvas.SetBackgroundColour(wx.Colour(100,255,255))

        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.canvas, 1, wx.EXPAND)
        self.SetSizer(sizer)
        self.draw()
        
        self.timer = wx.Timer(self, 1)
        self.Bind(wx.EVT_TIMER, self.update_graph, self.timer)
        self.timer.Start(1000)

    def update_graph(self, event):
        print('Uppdate graph!')
        self.draw(event)

    def draw(self, event=None):
        print('draw!')
        
        if self.lastplot:
            self.lastplot[0].remove()
        
        x = np.random.rand(100) * 100
        # x = np.arange(-10, 10, 0.01)
        y = np.cos(x)
        self.lastplot = self.subplot.plot(x, y)
        self.subplot.set_title('sample (cos)')
        self.subplot.set_xlabel('x')
        self.subplot.set_ylabel('y')
        # self.Refresh()  # 単体だと効果なし
        # self.Update()  # 単体で効果なし
        self.canvas.draw()  # 単体で有効！


def main():
    app = wx.App()
    frame = wx.Frame(None, size=(500,500))
    panel = myWxPlot(frame)
    frame.Show()
    app.MainLoop()

if __name__ == '__main__':
    main()