Tkinter: How to set ttk.Radiobutton activated and get its value?
Solution 1
use self.my_var.set(1)
to set the radiobutton with text='5'
as the default RadioButton.
To get the selected one you have to call a function
rb1 = ttk.Radiobutton(self.frame, text='5', variable=self.my_var, value=5,command=self.selected)
rb2 = ttk.Radiobutton(self.frame, text='10', variable=self.my_var, value=10,command=self.selected)
rb3 = ttk.Radiobutton(self.frame, text='15', variable=self.my_var, value=15,command=self.selected)
self.rb1.grid(row=0)
self.rb2.grid(row=1)
self.rb3.grid(row=2)
def selected(self):
if self.my_var.get()==5:
"do something"
elif self.my_var.get()==10:
"do something"
else:
"do something"
Solution 2
As for your first question, a convenient and straightforward way is to call the invoke
method:
rb2.invoke()
Note that this also runs any command
associated with this button.
See the Ttk::radiobutton invoke documentation.
Solution 3
I'm just adding something to Gogo's answer but i can't comment because i don't have enough reputation.
Add self.my_var=tk.IntVar()
before the radiobuttons or your program will not know the variable. see The Variable Classes for more informations
for exemple, in my case i need a StringVar():
this works for python 3.* change tkinter
to Tkinter
for python 2 (i'm not 100% sure tho)
import tkinter as tk
from tkinter import ttk
class XFile_Page(tk.Frame):
...
self.joinType = tk.StringVar()
self.rbLeft = ttk.Radiobutton(self.frameRadioButtons, text='left', variable=self.joinType, value='left',command=self.RadioBtnSelected)
self.rbRight = ttk.Radiobutton(self.frameRadioButtons, text='right', variable=self.joinType, value='right',command=self.RadioBtnSelected)
self.rbLeft.grid(row=0)
self.rbRight.grid(row=1)
#select the rbLeft radiobutton
self.rbLeft.invoke()
def RadioBtnSelected(self):
print(self.joinType.get())
Solution 4
You can use rb1.state['selected']
to set the default as rb1
and self.my_var.get()
to get the value (i.e the text variable) of the radiobutton.
Comments
-
minerals almost 2 years
1) I need to set one of my three ttk.Radiobuttons activated by default when I start my gui app.
How do I do it?2) I also need to check if one of my ttk.Radiobuttons was activated/clicked by the user.
How do I do it?rb1 = ttk.Radiobutton(self.frame, text='5', variable=self.my_var, value=5) rb2 = ttk.Radiobutton(self.frame, text='10', variable=self.my_var, value=10) rb3 = ttk.Radiobutton(self.frame, text='15', variable=self.my_var, value=15) self.rb1.grid(row=0) self.rb2.grid(row=1) self.rb3.grid(row=2)
-
estephan500 almost 6 yearsthis was very useful!!
-
Gerd over 2 yearsMaybe this has changed since 2013, but to get
text='5'
you should useself.my_var_set(5)
- it's the radiobutton's value you use for activation. Anyway - your example is still helpful in 2021 ;-)