Linking a FuncAnimation() with a Button in Python 2.7

Question

I am trying to start a graph (which is it's getting data from serial port) on a button's click. I had tried the following code but was not successful. I am new to python. Please help me in guiding were I am wrong.

I am using Python 2.7 with Tkinter

Thanks in advance

import serial
import Tkinter as tk
import ttk

import matplotlib
matplotlib.use('TkAgg')
from matplotlib.backends.backend_tkagg import figureCanvasTkAgg
import matplotlib.animation as animation
import matplotlib.pyplot as plt
from matplotlib.figure import Figure

import tkFileDialog


x = []
adc_data = []


f = plt.Figure(figsize = (9,5), dpi = 100)
ax = f.add_subplot(111)

def select(self):
    self.BaudRate = self.Baud.get()
    self.COMPort = self.COM.get()

    self.ser = serial.Serial(port = self.COMPort, baudrate = self.BaudRate,bytesize = serial.EIGHTBITS, stopbits = serial.STOPBITS_ONE, parity = serial.PARITY_NONE)
    self.ser.close()
    self.ser.open()
    self.ser.flushInput();
    self.ser.flushOutput();

def quit_(self):
    self.ser.close()


def animate_(i):
     self.ser.write(str(chr(250)))

     data = self.ser.read(1)
     data1 = self.ser.read(1)

     LSB = ord(data)
     MSB = ord(data1)

     x.append(LSB)
     adc_data.append(MSB) #adding data to list
     plt.pause(.00001)


     ax.clear()
     ax.plot(x,adc_data)


def animate_button(self):
    ani = animation.FuncAnimation(f, animate_,interval=1000)



class ADC_Ref_Data(tk.Tk):

    def __init__(self, *args, **kwargs):

        tk.Tk.__init__(self, *args, **kwargs)

        tk.Tk.wm_geometry(self, '900x600+200+150')
        tk.Tk.wm_title(self, "ADC Reference")


        container = tk.Frame(self)
        container.pack(side="top", fill="both", expand = True)
        container.grid_rowconfigure(0, weight=1)
        container.grid_columnconfigure(0, weight=1)

        self.frames = {}

        frame = StartPage(container, self)

        self.frames[StartPage] = frame

        frame.grid(row=0, column=0, sticky = "nsew")

        self.show_frame(StartPage)

    def show_frame(self, cont):

        frame = self.frames[cont]
        frame.tkraise()


class StartPage(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self,parent)


        self.button = ttk.Button(self, text="Stop", state = 'disable',
                        command=lambda: quit_(self))
        self.button.place(relx = 0.97, rely = 0.95, height = 30 , width = 80, anchor = 'se')

        button2 = ttk.Button(self, text="Select",
                        command = lambda:select(self))
        button2.place(relx = 0.97, rely = 0.016, height = 30 , width = 80, anchor = 'ne')


        button4 = ttk.Button(self, text="Start",
                        command=lambda: animate_button(self))
        button4.place(relx = 0.03, rely = 0.95,  height = 30 , width = 80 , anchor = 'sw')




        canvas = FigureCanvasTkAgg(f, self)
        canvas.show()
        canvas.get_tk_widget().place(relx = 0.5, rely = 0.48, relwidth = 1, relheight = 0.8, anchor = 'center' )



app = ADC_Ref_Data()
app.mainloop()

score 2 · Answer 1 · answered Dec 22 '15 at 10:34

I got success in getting my plot to start on button click. To get my code working I just need to add a simple line in it which is as follow:

def animate_button(self):
    ani = animation.FuncAnimation(f, animate_,frames = 10, interval=1000)
    f.canvas.show()

score 0 · Answer 2 · edited May 23 '17 at 12:32

0

I know this is an old question, but for future travelers: There are a couple functions that are not documented that you can use to control the animation. See this answer for an example of start, stop and pause.

edited May 23 '17 at 12:32

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answered Apr 18 '17 at 21:08

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Linking a FuncAnimation() with a Button in Python 2.7

2 Answers2