Wsrtjtyk

I'm trying to write my fisrt script in python & tkinter.

I block to display a new frame from a function (def onDisplay) when a click is made from menu bar button, but nothing append.
No error is display :-(

The new frame is made with dynamic checkboxes from text files:
txt file:

item1

item2

...

item100

A screen of the GUI:

Here my code:

from tkinter import Tk, Frame, Menu, Checkbutton, Text, TOP, BOTH, X, N, LEFT, BooleanVar

from tkinter.ttk import Frame, Label, Entry

import glob



class Example(Frame):



    def __init__(self):

        super().__init__()



        self.initUI()

        #self.display_srv()



    def initUI(self):



        self.master.title("Submenu")



        menubar = Menu(self.master)

        self.master.config(menu=menubar)



        fileMenu = Menu(menubar)



        submenu = Menu(fileMenu)

        submenu.add_command(label="lst1", command=self.onDisplay)

        submenu.add_command(label="lst2")

        submenu.add_command(label="lst3")

        fileMenu.add_cascade(label='Listing', menu=submenu, underline=0)



        fileMenu.add_separator()



        fileMenu.add_command(label="Exit", underline=0, command=self.onExit)

        menubar.add_cascade(label="File", underline=0, menu=fileMenu)



    #The frame i tried to display

    def onDisplay(self):

        self.master.title("display it")

        self.pack(fill=BOTH, expand=True)

        frame1 = Frame(self)

        frame1.pack(fill=X)

        path = '/root/liste/*.txt'

        files=glob.glob(path)

        count = 0

        for file in files:

            with open(file, 'r') as lst_file:

                for item in lst_file:

                    # Need to split all item by 10

                    Checkbutton(self, text=item.rstrip()).grid(row=count//10, column=count%10)

                    count += 1





    def onClick(self):

        if self.var.get() == True:

            self.master.title("Checkbutton")

        else:

            self.master.title("")



    def onExit(self):



        self.quit()





def main():



    root = Tk()

    root.geometry("850x550+300+300")

    app = Example()

    root.mainloop()





if __name__ == '__main__':

Many thanks for any help

Regards,

The main problem is that you're mixing grid and pack in the same parent container. You are calling pack on frame1 but you are calling grid on the checkbuttons, and they both have a master or parent of self.

That can't work, because each of grid and pack will try to resize the container according to it's rules, triggering the other one to reconfigure according to it's rules, and so on until the end of time.

So, simply changing your call of .grid(...) to .pack(...) on the checkbuttons will fix that problem.

My guess is that you intended to put the checkbuttons inside frame1. If that's the case, you need to specify frame1 as the master for the checkbuttons. For readability and ease of debugging I also recommend placing the call to grid on a separate line. With that, you can continue to use grid for the checkbuttons and pack for everything else.

cb = Checkbutton(frame1, text=item.rstrip())

cb.grid(row=count//10, column=count%10)

I posted the correct code:

from tkinter import Tk, Frame, Menu, Checkbutton, Text, TOP, BOTH, X, N, LEFT, BooleanVar

from tkinter.ttk import Frame, Label, Entry

import glob



class Example(Frame):



    def __init__(self):

        super().__init__()



        self.initUI()

        #self.display_srv()



    def initUI(self):



        self.master.title("Submenu")



        menubar = Menu(self.master)

        self.master.config(menu=menubar)



        fileMenu = Menu(menubar)



        submenu = Menu(fileMenu)

        submenu.add_command(label="lst1", command=self.onDisplay)

        submenu.add_command(label="lst2")

        submenu.add_command(label="lst3")

        fileMenu.add_cascade(label='Listing', menu=submenu, underline=0)



        fileMenu.add_separator()



        fileMenu.add_command(label="Exit", underline=0, command=self.onExit)

        menubar.add_cascade(label="File", underline=0, menu=fileMenu)

    def onDisplay(self):

        self.master.title("display it")

        self.pack(fill=BOTH, expand=True)

        frame1 = Frame(self)

        frame1.pack(fill=X)

        path = '/root/liste/*.txt'

        files=glob.glob(path)

        count = 0

        for file in files:

            with open(file, 'r') as lst_file:

                for item in lst_file:

                    cb = Checkbutton(frame1, text=item.rstrip())

                    cb.grid(row=count//10, column=count%10)

                    count += 1



    def onClick(self):

        if self.var.get() == True:

            self.master.title("Checkbutton")

        else:

            self.master.title("")



    def onExit(self):



        self.quit()



def main():



    root = Tk()

    root.geometry("850x550+300+300")

    app = Example()

    root.mainloop()



if __name__ == '__main__':

    main()