I'm making a GUI application and I want to use matplotlib to display some plots. I have structured my code like that:
import tkinter as tk
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2Tk
import matplotlib.pyplot as plt
class PopUP_Graph(tk.Toplevel):
def __init__(self, *args, **kargs):
super().__init__(*args, **kargs)
self.fig, self.ax = plt.subplots()
self.drawing_area = FigureCanvasTkAgg(self.fig, master=self)
self.drawing_area.draw()
self.toolbar = NavigationToolbar2Tk(self.drawing_area, self)
self.toolbar.update()
self.drawing_area.get_tk_widget().pack(side="top", fill="both", expand=1)
class App:
def __init__(self, root):
self.master = root
self.button = tk.Button(root, text="Open graph", command=self.open_graph)
self.button.grid(column=0, row=0)
def open_graph(self):
popupgraph1 = PopUP_Graph(self.master)
popupgraph1.mainloop()
w, h = 900, 600
root = tk.Tk()
root.geometry(f'{w}x{h} 0 0')
app = App(root)
root.mainloop()
The problem I have is that when the toplevel window is displayed and then closed, the program won't close correctly even after closing the root window.
Is there a way to fix this??
CodePudding user response:
For some reason the tkinter mainloop is not stopping, even when the window is closed. To fix this, add root.wm_protocol("WM_DELETE_WINDOW", exit)
right after creating root
.
This tells tkinter to call exit
whenever the root window is closed. exit()
simply exits the Python interpreter. I know that this is not the most professional way to do this, but I tried using root.quit
in place of exit
, and I consistently had to click root
's close button twice before it actually closed.
Here is the full code, with the added line marked ### ADDED LINE
:
import tkinter as tk
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2Tk
import matplotlib.pyplot as plt
class PopUP_Graph(tk.Toplevel):
def __init__(self, *args, **kargs):
super().__init__(*args, **kargs)
self.fig, self.ax = plt.subplots()
self.drawing_area = FigureCanvasTkAgg(self.fig, master=self)
self.drawing_area.draw()
self.toolbar = NavigationToolbar2Tk(self.drawing_area, self)
self.toolbar.update()
self.drawing_area.get_tk_widget().pack(side="top", fill="both", expand=1)
class App:
def __init__(self, root):
self.master = root
self.button = tk.Button(root, text="Open graph", command=self.open_graph)
self.button.grid(column=0, row=0)
def open_graph(self):
popupgraph1 = PopUP_Graph(self.master)
popupgraph1.mainloop()
w, h = 900, 600
root = tk.Tk()
root.wm_protocol("WM_DELETE_WINDOW", exit) ### ADDED LINE
root.geometry(f'{w}x{h} 0 0')
app = App(root)
root.mainloop()
CodePudding user response:
As Henry Yik pointed out matplotlib.figure.Figure
should be used instead of pyplot
. Now it works:
import tkinter as tk
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2Tk
from matplotlib.figure import Figure
class PopUP_Graph(tk.Toplevel):
def __init__(self, *args, **kargs):
super().__init__(*args, **kargs)
# self.fig, self.ax = plt.subplots()
self.fig = Figure()
self.ax = self.fig.add_subplot()
self.drawing_area = FigureCanvasTkAgg(self.fig, master=self)
self.drawing_area.draw()
self.toolbar = NavigationToolbar2Tk(self.drawing_area, self)
self.toolbar.update()
self.drawing_area.get_tk_widget().pack(side="top", fill="both", expand=1)
class App:
def __init__(self, root):
self.master = root
self.button = tk.Button(root, text="Open graph", command=self.open_graph)
self.button.grid(column=0, row=0)
def open_graph(self):
popupgraph1 = PopUP_Graph(self.master)
popupgraph1.mainloop()
w, h = 900, 600
root = tk.Tk()
root.geometry(f'{w}x{h} 0 0')
app = App(root)
root.mainloop()