The issue here is, I havent yet defined the widget, and I want to test for it, which I cant use winfoexists () for. id(row=0, column=0, columnspan=2, sticky='NEWS')Įid(row=1, column=0, sticky='NEWS')īid(row=1, column=1, sticky='NEWS')įid(row=0, column=0, sticky='NEWS')ĭlg.tk.eval('tk::PlaceWindow '.format(dlg, parent))Ĭomment_button = ttk. Check if a widget exists in Tkinter before reference I want to make Tkinter test if a widget exists before performing an action.
Label = ttk.Label(frame, text="Message:")īutton = ttk.Button(frame, text="Comment")
(This uses python3 as that is what I have).
TKINTER WINFO EXISTS HOW TO
EDITĪ modified example follows to show how to use Toplevel and wm_transient for this purpose, along with a grab to make a modal dialog and placing the new dialog on top of the parent widget. It is also good to set the dialog toplevel as transient for its parent ( dlg.wm_transient(root)) so that the window manager only shows a taskbar icon for the application root and not for every dialog it creates. This way the window manager will see the proper hierarchy of windows. w.after(delayms, callbackNone, args) Requests Tkinterto call function callbackwith arguments argsafter a delay of at least delaymsmilliseconds. I enclose a script to better clarify what I would like to do. However, I cannot test the existence of a Toplevel by passing the name of this to winfoexists () method. descriptions, wcan be any widget of any type. I’m trying to test the existence of a toplevel using the winfoexists () method made available by Tkinter. A toplevel has an owner which can be the Tk root window or other application window. Universal widget methods The methods are defined below on all widgets. winfo exists window: Returns 1 if there exists a window named window. Instead we have Toplevel for new toplevel windows (ie dialogs). The winfo command is used to retrieve information about windows managed by Tk. However, you should not be calling Tk() again in the message function. You can check for the existence of a window using the winfo_exists() method of the widget object.
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