I followed this tutorial in creating a very simple text-editor app using Python's Tkinter. What I wanted to do was add the option of using a checkbutton, so when checked, the theme of the text-editor would change to dark-mode theme and when unchecked, would return to the default white theme. How can I do this?
I tried binding a function the checkbutton where it would check the state and depending on the state, change the variables of the frames in the window. For example, if it was:
frame = tk.Frame(colour=white)
as the default, in the function I would put:
frame = tk.Frame(colour=white)
Even to me, this didn't look right. (I know the format is incorrect.)
Here the code (without my attempt at doing the dark-mode):
import tkinter as tk
from tkinter.filedialog import askopenfilename, asksaveasfilename
def open_file():
"""Open a file for editing."""
filepath = askopenfilename(
filetypes=[("Text Files", "*.txt"), ("All Files", "*.*")]
)
if not filepath:
return
txt_edit.delete(1.0, tk.END)
with open(filepath, "r") as input_file:
text = input_file.read()
txt_edit.insert(tk.END, text)
window.title(f"Simple Text Editor - {filepath}")
def save_file():
"""Save the current file as a new file."""
filepath = asksaveasfilename(
defaultextension="txt",
filetypes=[("Text Files", "*.txt"), ("All Files", "*.*")],
)
if not filepath:
return
with open(filepath, "w") as output_file:
text = txt_edit.get(1.0, tk.END)
output_file.write(text)
window.title(f"Simple Text Editor - {filepath}")
window = tk.Tk()
window.title("Simple Text Editor")
window.rowconfigure(0, minsize=800, weight=1)
window.columnconfigure(1, minsize=800, weight=1)
txt_edit = tk.Text(window)
fr_buttons = tk.Frame(window, relief=tk.RAISED, bd=2)
btn_open = tk.Button(fr_buttons, text="Open", command=open_file)
btn_save = tk.Button(fr_buttons, text="Save As...", command=save_file)
btn_open.grid(row=0, column=0, sticky="ew", padx=5, pady=5)
btn_save.grid(row=1, column=0, sticky="ew", padx=5)
fr_buttons.grid(row=0, column=0, sticky="ns")
txt_edit.grid(row=0, column=1, sticky="nsew")
window.mainloop()