Tkinter radiobutton border

[Mike]

I've placed a radiobutton on a green panel. The background of the
radiobutton is also green. Borderwidth is 0 and relief is FLAT. I
still get a thin gray border around the radiobutton. What is this
border, and how can I get rid of it. Thanks.

Mike

[Peter Otten]

Mike wrote:

I've placed a radiobutton on a green panel. The background of the
radiobutton is also green. Borderwidth is 0 and relief is FLAT. I
still get a thin gray border around the radiobutton. What is this
border, and how can I get rid of it. Thanks.

Try

highlightthickn ess=0

Peter

[Jeff Epler]

Peter Otten's advice is correct, if all you want to do is get rid of
this 1-pixel area. However, you may want to use highlightbackgr ound to
set it to green, so that the visual cue for "this widget has keyboard
focus" is retained.

To explain a little more, every widget has a "highlight rectangle"
around it, which has a thickness of highlightthickn ess and a color of
either highlightcolor (if the widget or a child has focus), or
highlightbackgr ound (otherwise).

A few widgets may actually behave differently (buttons on win32 display
a dotted rectangle between the border and the contents, for instance).
Widgets that don't normally take focus (such as frames and labels) have
a 0 highlightthickn ess by default, but can be given a highlightthickn ess.

Widgets that tend to take keyboard focus default to a highlight
thickness of 1, with back for highlightcolor and the system background
color for highlightbackgr ound. This is why I suggest that you consider
setting the highlightbackgr ound to green.

If you create a scrolled area, you may want to set the
highlightthickn ess of the scrolled widget to 0, and that of the frame
that encloses it and the scrollbars to 1. This will make the focus
rectangle surround the scrolled widget and the scrollbars together.

Jeff