Embedding Matplotlib in Tkinter doesn't dispay anything - animation

Question

I am trying to use the figure that is being created inside the class "SubplotAnimation" and place it to my graph page but it doesn't work.. Please help me... Here is my code (Tried to take all the unnecessary stuff, but some are left...):
import matplotlib
matplotlib.use("TkAgg")
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg
#import tkinter as tk
import Tkinter as tk
import numpy as np
import matplotlib.pyplot as plt
from matplotlib.lines import Line2D
import matplotlib.animation as animation
class SubplotAnimation(animation.TimedAnimation):
def __init__(self):
fig = plt.figure()
fig.set_size_inches(10, 7)
ax2 = plt.subplot2grid((2, 2), (0, 0), colspan=2)
ax3 = plt.subplot2grid((2, 2), (1, 0), colspan=2)
self.t = np.linspace(0, 80, 400)
self.x = np.cos(2 * np.pi * self.t / 10.)
self.y = np.sin(2 * np.pi * self.t / 10.)
self.z = 10 * self.t
ax2.set_xlabel('y')
ax2.set_ylabel('z')
self.line2 = Line2D([], [], color='black')
ax2.add_line(self.line2)
ax2.set_xlim(0, 800)
ax2.set_ylim(-1, 1)
ax3.set_xlabel('x')
ax3.set_ylabel('z')
self.line3 = Line2D([], [], color='black')
ax3.add_line(self.line3)
ax3.set_xlim(0, 800)
ax3.set_ylim(-1, 1)
animation.TimedAnimation.__init__(self, fig, interval=50, blit=True)
def _draw_frame(self, framedata):
i = framedata
self.line2.set_data(self.z[:i], self.y[:i])
self.line3.set_data(self.z[:i], self.x[:i])
self._drawn_artists = [self.line2, self.line3]
def new_frame_seq(self):
return iter(range(self.t.size))
def _init_draw(self):
lines = [self.line2, self.line3]
for l in lines:
l.set_data([], [])
#ani.save('test_sub.mp4')
#property
def fig(self):
return self._fig
plt.show()
class MainPage(tk.Tk):
def __init__(self, *args, **kwargs):
root = tk.Tk.__init__(self, *args, **kwargs)
tk.Tk.wm_title(self, "Heeeeelp")
container = tk.Frame(self)
container.pack(side="top", fill="both", expand=True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
#********** FRAMES*******#
self.frames = {} #empty..
frame = GraphPage(container, self)
self.frames[GraphPage] = frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame(GraphPage)
def show_frame(self, cont):
frame = self.frames[cont]
frame.tkraise()
class GraphPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self,parent)
label = tk.Label(self, text="Help")
label.grid(row=0, column=0, sticky='NW')
ani = SubplotAnimation()
canvas = FigureCanvasTkAgg(ani.fig, self)
canvas.show()
canvas.get_tk_widget().grid(row=1, column=0, rowspan=6, columnspan=3, sticky='NSEW')
app = MainPage()
app.geometry("980x640")
app.mainloop()

Answer 1

Okay, some things are needed to make this work.
First of all, I don't really understand why you have the code
#property
def fig(self):
return self._fig
but I think you need to just delete this. Also remove the plt.show() beneath it since that does nothing.
Then you need to rename fig in SubplotAnimation to self.fig:
self.fig = plt.figure()
self.fig.set_size_inches(10, 7)
Lastly, you should take the call to animation.TimedAnimation.__init__, put it right behind canvas = FigureCanvasTkAgg(ani.fig, self) and change it to
animation.TimedAnimation.__init__(ani, ani.fig, interval=50, blit=True)
I believe that are all the steps needed to make it work.
If you want to keep the initialization of the animation in your SubplotAnimation class, you can also make a new function to initialize it like
def _init_animation(self):
animation.TimedAnimation.__init__(self, self.fig, interval=50, blit=True)
And call it after canvas = FigureCanvasTkAgg(...) using
ani._init_animation()