[Tkinter-discuss] Looking for example of how to use <<MenuSelect>> to determine currently selected menu item

[Michael Lange]

Hi Malcolm,

Thus spoketh python at bdurham.com 
unto us on Sat, 20 Nov 2010 18:09:58 -0500:

> Hi Michael,
> 
> Thank you for your idea to use the <Motion> event. That works when I use
> the mouse, but it doesn't work when a user uses the cursor keys to move
> between menu items.

sure, you're right, I didn't think of that.

> 
> I can trap the <<MenuSelect>> event - I just need a way to determine the
> current menu widget and its active index.
> 
> The event object passed to the function I bind to has event.widget
> reference to a string vs. a widget. Do you have any ideas on how I can
> determine the active menu widget and its active index independent of a
> current event object?

Thank god, Tkinter offers a solution which is actually much easier
than my first example :)

########################
from Tkinter import *

root = Tk()
m = Menu(root)
m.add_command(label='foo')
m.add_command(label='bar')
m.add_command(label='blah')

root.bind('<3>', lambda event: m.tk_popup(event.x_root, event.y_root))

def callback(event):
    print event.widget.index('active')

m.bind('<<MenuSelect>>', callback)

root.mainloop()
#########################

Regards

Michael


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