Re: [Beaver-devel] Line Numbering

[Michael Terry]

Leslie Polzer wrote:
> I have postponed the charset stuff until you have time to answer.
>
> In the meanwhile I have made the GtkTextView's left window visible
> and thought about the possibilities to display line numbers.
> SciTE and Scintilla do it the easy way: they don't display partial lines
> and scroll line by line.
>
> I suggest we use Labels to display the numbers - font and size like those
> used in the TextView. But how should we position them? With fixed ccordinates?
> Should we meddle with things like gtk_text_view_get_line_at_y() ?

That seems reasonable.  Do:

gtk_text_view_window_to_buffer_coords (view, GTK_TEXT_WINDOW_TEXT, 0, 0, 
&x, &y);
gtk_text_view_get_line_at_y (view, &iter, y, &line_top);
line = gtk_text_iter_get_line (&iter);
gtk_text_view_buffer_to_window_coords (view, GTK_TEXT_WINDOW_TEXT, x, 
line_top, &x, &y);

Now, place the first label at y-height of y.

You could just keep placing labels from that point on without refering 
back to the buffer, but that gets hairy with word wrap.  You could keep 
advancing the iter you got by a line and checking to see how far its 'y' 
went.

-mt

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