CODEWITHSUNDEEP
pythonclasstkinter
Mouad_thf
Mouad_thf

Reputation: 11

I want to increase a variable whenever I click a button in tkinter

Hello guys, please I'm using this code and I want it to increase a variable named compteur when I click in the button, I want it to be increased in the __init__ function.

but the problem is that this variable stays always to 0

import tkinter as tk
from tkinter import ttk
from PIL import ImageTk, Image

class MainUi(tk.Tk):
    def __init__(self, *args, **kwargs):
        tk.Tk.__init__(self, *args, **kwargs)
        self.geometry("300x400")
        self.geometry("+500+100")
        container = tk.Frame(self)
        container.pack(side="top", fill="both", expand=True)
    
        self.frames = {}
        frame = StartPage(container, self)
        self.frames[StartPage] = frame
        frame.place(relx=0, rely=0, relwidth=1, relheight=1)




class StartPage(tk.Frame):
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        self.configure(background='white')
        # self.master.configure(background='black')
        self.compteur = 0
        button1 = ttk.Button(self, text="Next", width=7, command = lambda: self.next_clicked())
        button1.place(relx=0.8, rely=0.9)  

        print(self.compteur)

    def next_clicked(self):
        self.compteur += 1
        
app = MainUi()
app.mainloop()

Upvotes: 0

Views: 74

Answers (2)

toyota Supra
toyota Supra

Reputation: 4595

I want it to increase a variable named compteur when I click in the button, I want it to be increased in the init function.

yes it works like this, but i need it to be changed inside the init function because i need to use it in some labels

The problem can be fixed.

  • Add Label widget inside __init__ function in StartPage
  • Add .configure for Label widget in next_clicked function.

That all.

Code:

def __init__(self, parent, controller):
   :
   :
   :

    self.label_counter = ttk.Label(self, width=5)
    self.label_counter.pack()
   :
   :
   :

def next_clicked(self):
    self.compteur += 1
    self.label_counter.configure(text=self.compteur)
    print(self.compteur)

Screenshot:

enter image description here

Upvotes: 0

Georgy Kopshteyn
Georgy Kopshteyn

Reputation: 763

The issue is not that self.compteur is not raised, but that the print(self.compteur) statement, which would print the raised value, is placed outside of the next_clicked(self) method. This should work:

def next_clicked(self):
    self.compteur += 1
    print(self.compteur)

Upvotes: 1

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