[pygtk] Re: Font setting as user inputs text in TextView/TextBuffer?

[Tony Nelson]

At 3:04 PM -0600 3/20/06, skip at pobox.com wrote:
>Responding to my own post (bad form, I know)...
>
>Indeed, it seems that connecting to the TextBuffer's changed signal is the
>correct way to set the text attributes for new insertions.  That seems like
>it could get pretty inefficient if the buffer's contents get large.  My code
>looks like this:
>
>    def __init__(self, ...):
>        ...
>        buf.connect("changed", self.tweak_attributes)
>
>    def tweak_attributes(self, buf):
>        tt = buf.get_tag_table()
>        if tt.lookup("monospace") is None:
>            buf.create_tag("monospace", font="courier")
>        start, end = buf.get_bounds()
>        buf.apply_tag_by_name("monospace", start, end)
>
>Is there a more efficient way to do this than applying the tag to the entire
>buffer for every character change?  I'm a little paranoid about this because
>in my experience the TextView/TextBuffer combination tends to bog down with
>even moderate amounts of text.  When using it as the target of a logging
>handler I trim the early lines if its contents grow to more than 500 lines
>because of performance problems.  Maybe it's a scrolling thing, but still...

I do something much stupider:  I call TextView.modify_font().  I do fiddle
around with styles for some other things, but this seems to work for
setting one font for the whole widget.
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