8/4/2023 0 Comments Tkinter winfo existsIf you click the button "Check", it will print whether the label widget exists or not. I have created a tkinter GUI that uses a button callback to open another window (other searches say this window should be a top-level window) and it works pretty good, how-ever each time the button is pressed it opens another identical (as far as I can tell) window. In the application, we can check if the label widget is present or not. Running the above code will display a window with a button and a label widget. # We will define a button to check if a widget exists or notīutton = ttk.Button(win, text="Check", command=check_widget)īace(relx=.5, rely=.5, anchor=CENTER) The second time this procedure is called, there will be an error message box pop up. The root window and other Toplevel windows provide additional methods. Label = Label(win, text="Hey There! Howdy?", font=('Helvetica 18 bold')) Hi, Tcl/Tk masters: If I have a procedure which will generate a widget. Basic Widget Methods The following methods are provided by all widgets (including the root window). # Define a function to check if a widget exists or not It can take any of a number of different forms. It returns a Boolean value where True(1) specifies that the widget exists in the application, and False(0) specifies that the widget doesn't exist in the application. The winfo()method is used to retrieve information about windows managed by Tkinter. So, Im just making a silly program with TKinter to simulate the DVD bouncing logo, which works, but doesnt change the colors (in this case I have 4 different images. At this point Im not getting an error, its just not working at all. The method can be invoked with the particular widget we want to check. Ive seen almost every post about this issue and nothing solved it. If we want to check if a widget exists or not, then we can use the winfo_exists() method. To make a particular Tkinter application fully functional and operational, we can use as many widgets as we want. from tkinter import def homeScreen (): global endtext, againbutton if endtext.winfoexists () 1: stroy () stroy () successloginlabel (window, text ('You are logged in as: ' + Username)) id (column1, row4) global startquiz startquizButton (window, text'Start Quiz', commandquiz) startqu.
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