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<H3><A NAME="SECTION0018165000000000000000">
16.1.6.5 The Window Manager</A>
</H3> <a id='l2h-4838' xml:id='l2h-4838'></a>

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

<P>
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 <tt class="method">_root()</tt> 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.

<P>
Here are some examples of typical usage:

<P>
<div class="verbatim"><pre>
from Tkinter import *
class App(Frame):
    def __init__(self, master=None):
        Frame.__init__(self, master)
        self.pack()


# 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
myapp.mainloop()
</pre></div>

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<span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span>
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