Re: How to make scroll bars follow text

["Richard Warren" <rew primagraphics co uk>]

David,

I couldn't find an automatic way of doing it but it's fairly simple to
manually scroll every time you insert some text.

You need a "GtkTextMark" at the end of the buffer which you can get (once)
with:

    GtkTextIter startIter, endIter;
    GtkTextMark *endMark;

    gtk_text_buffer_get_bounds(textBuffer, &startIter, &endIter);
    endMark = gtk_text_buffer_create_mark(textBuffer, NULL, &end, FALSE);

(assuming "textBuffer" is a "GtkTextBuffer *").

Then, after every insert, manually cause a scroll with:

    gtk_text_view_scroll_mark_onscreen(textView, endMark);

(where textView is the result of your gtk_text_view_new() call).

There are alternative scrolling functions described in the documentation
which allow you to specify the location on screen and so on if you need it.

All the above assumes GTK+ V2 by the way.

Regards,
Richard.

----- Original Message -----
From: "David Shifflett" <shifflett nps navy mil>
To: <gtk-app-devel-list gnome org>
Sent: Friday, September 20, 2002 10:12 PM
Subject: How to make scroll bars follow text


> Hi,
> I am using a scrolled window and want to know how to
> automatically make the scrollbar (vertical only)
> position itself such that last item inserted into
> the text field (within the scrolled window) is always
> visible at the bottom of the scrolled window.
>
> To put it another way:
> The scrolled window shows 10 lines of text at a time.
> once the text widget has more than 10 lines in it,
> the bottom ten lines should be visible whenever new
> text is added to the text widget.
>
> Once the text widget is completely full (say 100 lines)
> and I put the scrollbar all the way down manually,
> the scrollbar will always show the last text inserted.
>
> How do I make this behavior the default, even before
> the text widget is full?
>
> Any help, comments, examples, would be appreciated
> Thanks,
> David Shifflett