The Window Manager

In Tk, there is a utility command, wm, for interacting with the window manager. Options to the wm command allow you to control things like titles, placement, icon bitmaps, and the like. In Tkinter, these commands have been implemented as methods on the Wm class. Toplevel widgets are subclassed from the Wm class, and so can call the Wm methods directly.

To get at the toplevel window that contains a given widget, you can often just refer to the widget's master. Of course if the widget has been packed inside of a frame, the master won't represent a toplevel window. To get at the toplevel window that contains an arbitrary widget, you can call the _root() method. This method begins with an underscore to denote the fact that this function is part of the implementation, and not an interface to Tk functionality.

Here are some examples of typical usage:

from Tkinter import *
class App(Frame):
    def __init__(self, master=None):
        Frame.__init__(self, master)

# create the application
myapp = App()

# here are method calls to the window manager class
myapp.master.title("My Do-Nothing Application")
myapp.master.maxsize(1000, 400)

# start the program

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