Window

Create a directory for this project and open it in your preferred editor.

You can organize your Python files however you like, though you'll probably want a main.py file for your main function.

Start by importing a few things from tkinter:

from tkinter import Tk, BOTH, Canvas

Create a new Window class. Its constructor should:

• Take width and height as parameters. This will be the size of the new window we create, in pixels.
• Create a new root widget using Tk() and save it as a data member.
• Set the title of the window using the root widget's title method.
• Create a Canvas widget with the root widget as its parent and the supplied width and height, then save it as a data member.
• Pack the canvas widget so it's ready to be drawn.
• Create a data member to represent that the window is "running," and set it to False.

Add a redraw method to the Window class. It should redraw all the graphics in the window (the assumption is their positions and colors and such may have changed).

• Note: Tkinter is not a reactive framework like React or Vue – we need to tell it when to redraw the window.
• Use the root widget's update_idletasks and update methods to accomplish this.

Add a wait_for_close method to the Window class. This method should:

• Set the running state to True.
• Call self.redraw() over and over as long as the running state remains True.

Add a close method to the Window class. Have it set the running state to False.

In the Window constructor, call the root widget's protocol method to connect your close method to the "delete window" action. This will stop your program when you close the graphical window:

self.__root = Tk()
...
self.__root.protocol("WM_DELETE_WINDOW", self.close)

Create a main entrypoint function, and in it, create a window and wait for it to close:

win = Window(800, 600)
win.wait_for_close()

Make sure your main function is called, then try running the file. Confirm that a blank window opens and that closing the window ends the program.

# Assuming your entrypoint file is main.py
python3 main.py