Hi all,
I am trying to update the colour of a Tkinter label, so as the value of a variable changes so to does the colour of the text.
Below is a simple example of what I am trying to achieve, but the problem is when I press the button I want the labels colour to update to red.

from Tkinter  import *
root = Tk()
colour = StringVar()
colour.set('blue')
def colourUpdate():
    colour.set('red')
    root.update()
    
btn = Button(root, text = "Click Me", command = colourUpdate)
l = Label(root, textvariable=colour, fg = colour.get())
l.pack()

btn.pack()
root.mainloop()

The label's fg option is not executed when root.update is called. It does not seem logical.
You should set the fg option of the label in the command somehow. I am not an expert int tkinter, but recreating it is always a possibility.
Textvariable applies only for the text option. As far as I read the docs.

def colourUpdate():
    l.config(fg='red')
    root.update()

Edited 6 Years Ago by slate: n/a

Like this?

from Tkinter  import *
def colourUpdate():
    colour.set('red' if colour.get()!='red' else 'blue')
    print colour.get()
    l.configure(fg=colour.get())

root = Tk()
colour = StringVar()
colour.set('red')
    
btn = Button(root, text = "Click Me", command = colourUpdate)
l = Label(root, textvariable=colour, fg = colour.get())
l.pack()

btn.pack()
root.mainloop()

l is not the most recommendable variable name.

Edited 6 Years Ago by pyTony: n/a

This question has already been answered. Start a new discussion instead.