TKInterTimeSetPlotter

Example Python program TKInterTimeSetPlotter.py

Modules

import matplotlib
import matplotlib.pyplot as plt
from PIL import Image, ImageTk
from tkinter import Tk, Label, Frame # Python 3
from Tkinter import Tk, Label, Frame # Python 2
import io

Classes

class TimeSetPlotter(Frame):

Methods

def init(self, timeset, master):
def update_image(self):

Code

Python tkinter example

import matplotlib
matplotlib.use("Agg")
import matplotlib.pyplot as plt

from PIL import Image, ImageTk
from tkinter import Tk, Label, Frame  # Python 3
# from Tkinter import Tk, Label, Frame  # Python 2

#############################################################
#  Please note that the previous examples were in Python 2  #
#############################################################

import io

class TimeSetPlotter(Frame):
    def __init__(self, timeset, master):
        Frame.__init__(self, master)
        self.pack()
        self.label = Label(self)
        self.label.pack()

        self.timeset = timeset

        self.figure = plt.figure()
        plt.ylim((0,60))
        self.graph = self.figure.add_subplot(111)

        self.graph.plot([x.second for x in self.timeset.set])

        self.buffer_ = io.BytesIO()
        self.figure.savefig(self.buffer_, format="png")
        self.buffer_.seek(0)  # After saving to a buffer, you need to seek back to the "front"
        self.img = Image.open(self.buffer_)
        self.photo = ImageTk.PhotoImage(self.img)  # This is how we translate a PIL image into something tkinter-friendly
        self.label.config(image=self.photo)  # use "config" to set properties of tkinter widgets

        self.after(500, self.update_image)  # setting our super-sexy callback function for 500 ms

    def update_image(self):
        self.graph.clear()  # matplotlib will just keep piling on the plots unless you call this
        self.graph.plot([x.second for x in self.timeset.set])
        plt.ylim((0,60))  # set the y-axis limits after you call "plot"

        self.buffer_.seek(0)
        self.figure.savefig(self.buffer_, format="png")
        self.buffer_.seek(0)
        self.img = Image.open(self.buffer_)
        self.photo = ImageTk.PhotoImage(self.img)
        self.label.config(image=self.photo)

        self.after(50, self.update_image)  # make sure this function keeps on running

Useful Links

Articles: https://python-commandments.org/
Python shell: https://bsdnerds.org/learn-python/
Tutorial: https://pythonprogramminglanguage.com/