[pygtk] Difficulty with rich text in gtk.TextView

[Dennis Honeyman]

Hi everyone.  I've been working on a simple rich text component for a
project I've been working on using a gtk.TextView, and while I have
something that's usable (in a very loose sense of the word =), there
are a couple of problems I'm having that I can't figure out how to
solve.  This is what I have so far...

http://pastebin.com/m6d3eb0b9
(The toggle buttons and text view are part of a glade file)

For one, if there isn't text selected and the bold, italic, or
underline button is pressed, I tried to apply the tag
(buffer.apply_tag_by_name) by using the cursor's position as the start
and end gtk.TextIter, although it seems to do nothing, as any text I
type after I apply the tag is still in the same font as before.

Also, when I have the cursor at the last character of a section of
text with an applied style and I type more text, it doesn't keep the
formatting like word processors do.

(If text in underscores is bold)
_This is bold te_
(But if I keep typing, the formatting isn't kept)
_This is bold te_xt
(It should be like this)
_This is bold text_

I found a rich text demo application in Pygtk while I was searching
for a solution (http://www.mail-archive.com/pygtk@daa.com.au/msg10283.html),
but that one has the same limitation as mine. (Tags are not applied to
text added directly after a section with the tag applied)

And lastly, when the cursor is at the beginning of a block of text
with an applied style, the gtk.TextIter at the cursor position says
that the tag for the style is applied, but when I type it shows up in
the default font

( '|' is the cursor)
|_ere is bold text_
(iter.get_tags() has the bold tag, but when I type something...)
h_ere is bold text_
(The tag is not applied)

Why does it say that the bold tag is applied at the cursor if it
doesn't apply the tag to text typed at that location?

I think I might be missing something fundamental about how tags work... >_<


I'm sorry if any of this was unclear.  If anyone could point me in the
right direction I would be grateful. =)

~Dennis