import tkinter as tk                                                                
from datetime import date, datetime                                                 
from tkinter import ttk                                                             
                                                                                      
import matplotlib.animation as pltanim                                              
import matplotlib.pyplot as plt                                                     
from matplotlib.axes import Axes                                                    
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg                     
                                                                                      
                                                                                      
class DayPlotFrame(ttk.Frame):                                                      
    """TK Frame with matplotlib animation for live display of day progress."""   
                                                                                      
    def __init__(self, master=None):                                                
        """Initialize a new DayPlot."""                                             
        super().__init__(master=master)                                             
                                                                                    
        plt.xkcd()  # <- comment out this line and everything starts working again                                                                
        fig = plt.Figure()                                                          
        self.axes: Axes = fig.add_subplot()                                         
                                                                                    
        canvas = FigureCanvasTkAgg(fig, master=self)                                
        canvas.get_tk_widget().pack(fill=tk.BOTH, expand=True)                      
        self.animation = pltanim.FuncAnimation(                                     
            fig,                                                                    
            func=self.__run_animation,                                              
            init_func=self.__init_animation,                                        
        )               
        self.pack()                                                    
                                                                                       
    def __init_animation(self):                                                     
        """Configure the plot."""                                                   
        today = date.today()                                                        
                                                                                    
        self.axes.clear()                                                           
        self.axes.set_xlim(                                                         
            datetime(today.year, today.month, today.day, 8, 45, 0),                 
            datetime(today.year, today.month, today.day, 15, 11, 00),               
        )                                                                           
                                                                                      
    def __run_animation(self, frame):                                               
        """Update the plot according to the time of day."""                         
        width = datetime.now().replace(hour=10, minute=frame % 60)                  
        self.axes.barh(y=[1], width=width, color="blue")

ROOT = tk.Tk()
APP = DayPlotFrame(master=ROOT)
APP.mainloop()