Tkinter 8.5 reference: a GUI for Python |  |
Especially under MacOS, it is sometimes desirable to create menus that are shown as part of the top-level window. To do this, follow these steps.
Using any widget
WW.winfo_toplevel()Create a
Menuwidget, using the top-level window as the first argument.Items added to this
Menuwidget will be displayed across the top of the application.
Here is a brief example. Assume that self
is the application instance, an instance of a class that
inherits from Frame. This code would
create a top-level menu choice named “” with one choice named
“” that calls
a handler named self.__aboutHandler:
top = self.winfo_toplevel()
self.menuBar = tk.Menu(top)
top['menu'] = self.menuBar
self.subMenu = tk.Menu(self.menuBar)
self.menuBar.add_cascade(label='Help', menu=self.subMenu)
self.subMenu.add_command(label='About', command=self.__aboutHandler)
There is some variation in behavior depending on your platform.
Under Windows or Unix systems, the top-level menu choices appear at the top of your application's main window.
Under MacOS X, the top-level menu choices appear at the top of the screen when the application is active, right where Mac users expect to see them.
You must use the
.add_cascade()method for all the items you want on the top menu bar. Calls to.add_checkbutton(),.add_command(), or.add_radiobutton()will be ignored.