Set to bold the selected text using tags

Question

I have been working trying to make a simple text editor, and have been experimenting with tags. I have been able to create justifying using tags. Now I\'m adding a bold opti

Answer 1

You would only need tag_add() inside of your function:

import Tkinter as tk

def make_bold():
    aText.tag_add("bt", "sel.first", "sel.last")

lord = tk.Tk()

aText = tk.Text(lord, font=("Georgia", "12"))
aText.grid()

aButton = tk.Button(lord, text="bold", command=make_bold)
aButton.grid()

aText.tag_config("bt", font=("Georgia", "12", "bold"))

lord.mainloop()

I just happened across a rather educational example by none other than Bryan Oakley,
on a completely unrelated search!

Here is a quick example of the more dynamic alternative:

import Tkinter as tk
import tkFont

def make_bold():
    current_tags = aText.tag_names("sel.first")
    if "bt" in current_tags:
        aText.tag_remove("bt", "sel.first", "sel.last")
    else:
        aText.tag_add("bt", "sel.first", "sel.last")


lord = tk.Tk()

aText = tk.Text(lord, font=("Georgia", "12"))
aText.grid()

aButton = tk.Button(lord, text="bold", command=make_bold)
aButton.grid()

bold_font = tkFont.Font(aText, aText.cget("font"))
bold_font.configure(weight="bold")
aText.tag_configure("bt", font=bold_font)

lord.mainloop()