Python 2.7 Tkinter如何更改按钮文本的文本颜色

Question

button1 = Button(root,text='Revert image',foreground = "red",compound="center")

This type of code is not working. it says unknown option "-foreground".

This is the whole code that works -

from Tkinter import *
from ttk import *
def change():
   label.config(text="Hey dude !!")
   label.config(image = img1,background='blue',foreground='yellow')
def click():
         if button1.instate(["disabled"]):
                label.config(image = img1,background='yellow',foreground='green')
                button1.state(['!disabled'])
                button.state(['disabled'])
         else:
                label.config(image = img,background='yellow',foreground='green')
                button1.state(['disabled'])
                button.state(['!disabled'])
root = Tk()
label = Label(root)
img=PhotoImage(file='C:\\Users\\Vivek\\Desktop\\x.gif')
img1= PhotoImage(file='C:\\Users\\Vivek\\Desktop\\y.gif')
img2 = PhotoImage(file='C:\\Users\\Vivek\\Desktop\\z.gif')
button = Button(root)
button.pack()
button1 = Button(root,text='Revert image',compound="center")
img2_small = img2.subsample(30,80)
button.config(image=img2_small,text='Change image',compound='center')
button1.state(["disabled"])
button1.pack()
label.pack()
button.config(command=click)
button1.config(command = click)
label.config(image = img,background='yellow',foreground='green')
label.config(text = 'Hey dude watsup ?? Are you in a need help ?')
label.config(compound = 'left',wraplength=100,font=('Courier',20,'bold'))
label.after(5000,change)
root.mainloop()

Answer 1

Because you are doing global imports (rarely ever a good idea), and because you import ttk after tkinter. Both libraries define a Button widget, so the ttk Button is overriding the tkinter Button . The ttk Button has no foreground option.

You should stop using global imports to eliminate this problem:

import Tkinter as tk
import ttk
...
root = tk.Tk()
...
tk.Button(...)

Answer 2

so taking a look right here you can see that the "foreground" and "fg" option is the same. But this is only the case in the new version of tkinter for python3, if you are using an older version for python2.7 you have to use the "fg" option.

btn = Button(root, fg='red') #Creates a button with red text

If you would like to change the text color afterwards you can achieve this by using the config function:

btn.config(fg='blue') #Changes the text color to blue

I hope this clears things up a bit. keep coding ;D

Answer 3

I use fg

button1 = tk.Button(root, text='hello', fg='red')

edit: hm, actually, both fg and foreground work for me. If you don't bother with the color, does everything else work? It may be that some other error is propagating down. Here is an example of a simple Hello World program using tkinter. See if it works for you. I think the capitalization of tkinter has changed between Python 2 and 3. This is for Python 3.

import tkinter as tk

class Application(tk.Frame):
    def __init__(self, master=None):
        super().__init__(master)
        self.master = master
        self.grid()
        self.create_widgets()

    def create_widgets(self):
        self.TVB1 = tk.StringVar(self, value='hello, there')

        B1 = tk.Button(self)
        # this is an example of how you can define parameters after
        # defining the button
        B1["textvariable"] = self.TVB1
        B1["command"] = self.say_hi
        B1.grid(row=0,column=0)

        self.TVE1 = tk.StringVar(self, value='wubwub')
        E1 = tk.Entry(self, textvariable=self.TVE1)
        E1.grid(row=1, column=0)

        # and this is how you can define parameters while defining
        # the button
        Quit = tk.Button(self, text='QUIT', fg='red',
                              command=self.master.destroy)
        Quit.grid(row=2,column=0)

    def say_hi(self):
        print(self.TVB1.get())
        self.TVB1.set(self.TVE1.get())


root = tk.Tk()
app = Application(root)
app.mainloop()

Answer 4

Try this in Python 2.7:

import Tkinter as tk

so Tkinter with capitalized T