From: Olivier Renaud <o.renaud@...>
Date: 2007-03-15T09:34:01+09:00
Subject: Re: Gtk::TextBuffer colorful

Le jeudi 15 mars 2007 01:02, Karl Gabel a �crit�:
> Hello,
>
> is there any way to bring some color into the Gtk::TextView for some lines?
>
> example:
> this line is black
> this line is black
> this line is red
> this line is black
> ...
>
> I use the Gtk::TextBuffer.insert_at_cursor(text) function, because I
> generate a lot of lines dynamically.
>
> @textv_w =  @glade.get_widget("textview1")
> @buf = @textv_w.buffer
>
>
> but if I like to change the color ...
>
> def text_color(color)
>     #Gdk::flush
>     @textv_w.modify_text(Gtk::STATE_NORMAL, Gdk::Color.parse(color))
>     @buf= @textv_w.buffer
> end
>
>
> @buf.insert_at_cursor("this should be black")
> text_color("red")
> @buf.insert_at_cursor("this should be red")
> text_color("black")
> @buf.insert_at_cursor("this should be black again")
>
> ... the whole thing is black.
>
> I even tried to use the TextBuffer.text=(text) function.
> Gdk::flush does not work at all.
> Is there any way to flush the buffer before changing the color like
> $stdout.flush?
>
>
> Thanks!
>
> Karl

Hello,

For changing the color of a text (as well as the font, size, and so on), I 
remember I used a markup system, for GtkLabels. I cannot find a reference to 
markups in the doc for TextBuffer, but tags may be what you are looking for :

TextBuffer#insert(iter, text, tag1, tag2, tag3, ...)
  Inserts text into buffer at iter, applying an array of tags to the 
newly-inserted text. Equivalent to calling Gtk::TextBuffer#insert(iter, 
text), then Gtk::TextBuffer#apply_tag on the inserted text.

These tags are instances of class Gtk::TextTag, used to set the colors 
(foreground and background), size, font, style, ...

I haven't tried yet, so tell us if this works for you !

-- 
Olivier Renaud