Change Tkinter Button State

Jinku Hu Dec 10, 2020 Oct 31, 2019 Tkinter Tkinter Button
Change Tkinter Button State

Tkinter Button has two states,

  • NORMAL - The button could be clicked by the user
  • DISABLE - The button is not clickable
try:
    import Tkinter as tk
except:
    import tkinter as tk
    

app = tk.Tk()
app.geometry("300x100")
button1 = tk.Button(app, text="Button 1",
                    state=tk.DISABLED)
button2 = tk.Button(app, text="EN/DISABLE Button 1")
button1.pack(side=tk.LEFT)
button2.pack(side=tk.RIGHT)
app.mainloop()

The left button is disabled (gray out) and the right button is normal.

Tkinter Button States - DISABLED and NORMAL

The states could be modified in the dictionary-like method or configuration-like method.

try:
    import Tkinter as tk
except:
    import tkinter as tk
    
def switchButtonState():
    if (button1['state'] == tk.NORMAL):
        button1['state'] = tk.DISABLED
    else:
        button1['state'] = tk.NORMAL
        
app = tk.Tk()
app.geometry("300x100")
button1 = tk.Button(app, text="Python Button 1",
                    state=tk.DISABLED)
button2 = tk.Button(app, text="EN/DISABLE Button 1",
                    command = switchButtonState)
button1.pack(side=tk.LEFT)
button2.pack(side=tk.RIGHT)
app.mainloop()

By clicking button2, it calls the function switchButtonState to switch button1 state from DISABLED to NORMAL, or vice versa.

Tkinter Button States Switch - between DISABLED and NORMAL

state is the option of Tkinter Button widget. All the options in the Button widget are the keys of Button as a dictionary.

def switchButtonState():
    if (button1['state'] == tk.NORMAL):
        button1['state'] = tk.DISABLED
    else:
        button1['state'] = tk.NORMAL

The state is updated by changing the value of state in the Button dictionary.

The state could also be modified by using config method of Button object. Therefore, the switchButtonState() function could also be implemented as below,

def switchButtonState():
    if (button1['state'] == tk.NORMAL):
        button1.config(state=tk.DISABLED)
    else:
        button1.config(state=tk.NORMAL)

Even the strings normal and disabled could be simply used rather than tk.NORMAL and tk.DISABLED.

Author: Jinku Hu
Jinku Hu avatar Jinku Hu avatar

Founder of DelftStack.com. Jinku has worked in the robotics and automotive industries for over 8 years. He sharpened his coding skills when he needed to do the automatic testing, data collection from remote servers and report creation from the endurance test. He is from an electrical/electronics engineering background but has expanded his interest to embedded electronics, embedded programming and front-/back-end programming.

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