Python Tkinter: Adding widgets to file dialogs

Question

I am using Tkinter with Python 2.6 and 2.7 for programming graphic user interfaces.

These User Interfaces contain dialogs for

Answer 1

I had to get rid of the canvasx/y statements. That line now simply reads set item [$data(canvas) find closest $x $y], which works well. $data(canvas) canvasx $x for its own works well but not in connection with find closest, neither if it is written in two lines.