help with button to change text colour

[Davies]

Hi all, im new to Python and the raspberry. im trying to make a fairly complex tester, im starting with the gui and ive been able to get a functioning button and separate text window to display messages but now I want to put a colour to the background of that window with each of the 2 messages I currently have it displaying but anything I try from searching online fails to work with my current code.. # ive hashed what colours im trying to have appear as back ground

import Tkinter as tk

from Tkinter import *
import time


class GridDemo(Frame):
def var1(self):
self.label4String.set("Panel Test Began") # I Want This Background To Be Green
if self.button1["text"] == "Begin Panel Test":
print "You have started the panel test:", self.label4String.get()
self.button1["text"] = "Stop Panel Test"
else:
self.button1["text"] = "Begin Panel Test"
self.label4String.set("Panel Test Ended") # I Want This Background To Be Red
print "You have stopped the panel test:", self.label4String.get()
time.sleep(0.5)

def __init__(self):
Frame.__init__(self)
self.master.title( "Grid Demo" )
self.variable = "Start Variable"

self.master.rowconfigure( 0, weight=1)
self.master.columnconfigure( 0, weight=1)
self.grid(sticky=W+E+N+S)

self.button1 = Button(self, text = "Begin Panel Test", command = self.var1)
self.button1.grid(row=1, column=1, sticky=W+E+N+S)

self.button2 = Button(self, text="Quit", command=exit)
self.button2.grid(row=1, column=2, sticky=W+E+N+S)

self.label4String = StringVar()
self.label4 = Label(self, textvariable=self.label4String)
self.label4.grid(row=2, column=1, columnspan=2, sticky=W+E+N+S)

self.rowconfigure(1, weight=1)
self.columnconfigure(1, weight=1)

def main():

GridDemo().mainloop()

if __name__ == '__main__':
main()

[DougieLawson]

Try this, which will set the background colour to dark red then change it to green

Code: Select all

self.label4String.config(bg = 'dark red')
time.sleep(0.5)
self.label4String.config(bg = 'green')
time.sleep(0.5)

You can change foreground colour with

Code: Select all

self.label4String.config(fg='orange')

[Davies]

thank you for you reply, I receive this error " self.label4String.config(bg = 'green') AttributeError: StringVar instance has no attribute 'config'" when ive pasted into my code

[DougieLawson]

It works with this

Code: Select all

defaultColour = rootWindow.cget("bg")
clock = Label(rootWindow, font = ('fixed', 20), height = 2)
clock.config(bg = 'dark red')
time.sleep(0.5)
clock.config(bg = 'green')
time.sleep(0.5)
clock.config(bg=defaultColour)

[Davies]

I was able to do it by re writing my code like this
import Tkinter as tk

import time

def toggle_text():
if button["text"] == "Begin Panel Test":
button["text"] = "Stop Panel Test"
label["text"] = "Panel Test Began"
label.config(bg = 'green')
time.sleep(0.5)
else:
button["text"] = "Begin Panel Test"
label["text"] = "Panel Test Ended"
label.config(bg = 'dark red')
time.sleep(0.5)


root = tk.Tk()
root.title("Click the Button")

button = tk.Button(text="Begin Panel Test", width=12, command=toggle_text)
button.pack(padx=100, pady=10)
label = tk.Label(text=" ", width=24, font='bold')
label.pack(padx=200, pady=10)

root.mainloop()

Thank you for your help, I used your code on this

[scotty101]

You need to configure the Label that holds the text, not the text string itself.

Code: Select all

self.label4.config(bg='green'

Or use the dictionary method

Code: Select all

self.label4['bg']='green'