Terry J. Reedy added the comment:
Fixed. I added a light background as with Sphinx html. I am delighted with how
well this is working so far. I like the little always-there [TOC] button
better than the browser sidebar. Besides making it easy to verify the look of
doc changes, I think it looks better. I like the appearance of the tk version,
without the down arrow, a bit better than the ttk version with an arrow, but
would switch, when possible, if there were functional reason (see below).
To improve the button: I want to add an activebackground (or foreground) so
when moused over, the button is more obviously a live button to be pushed. Any
particular suggestion? Is there a standard? Or do I worry too much? Idle
buttons don't change when moused over, but they have relief to convey 'push me'.
So that people can navigate without mouse, I tested adding takefocus=True to
toc creation, takefocus=False to text, and toc.focus_set(). <space> (and
<click>), <enter>, and <esc> work as expected. However the tk Menubutton (but
not ttk version) seems to have a bug (at least here, ). After <space>, it is
left in a 'pressed' state, with a black outline, while the menu is displayed,
and after. (With <click> the outline and menu appear on button-press and the
outline disappears on button-release, while the menu remains.) A click on the
button is required to reset it and remove the outline. Then either <space> or
<click> work as before. I tried an expanded command function to reset toc,
def cmd(mark=tag):
toc['state'] = 'disabled'
toc['state'] = 'normal'
text.see(mark)
but this does not work. If this bug windows-only or general? Do you know of
any other workaround to make the tk version work right? Since click-to-reset
is not obvious, and defeats keyboard-only use, I will not enable focus when
click-reset is needed.
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<http://bugs.python.org/issue25198>
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