Simple text_view and text_buffer questions.

[Øystein Johansen <oystein gnubg org>]

Hi,

I want to make a message window where I can get display running 
messages. I'm using the GtkTextView like this:

  pwMessageText = gtk_text_view_new();
  pbMessageBuffer =
     gtk_text_view_get_buffer (GTK_TEXT_VIEW (pwMessageText));
  gtk_text_view_set_wrap_mode( GTK_TEXT_VIEW( pwMessageText ),
     GTK_WRAP_WORD );
  gtk_text_view_set_editable( GTK_TEXT_VIEW( pwMessageText ), FALSE );
  gtk_text_view_set_cursor_visible( GTK_TEXT_VIEW( pwMessageText ),
     FALSE );
  vscrollbar = gtk_scrolled_window_new (NULL, NULL);
  gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(vscrollbar),
     GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
  gtk_box_pack_start(GTK_BOX(pwvbox), vscrollbar, TRUE, TRUE, 0);
  gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(vscrollbar),
                  pwMessageText);


Then I'm sending messages the the buffer like this:

  gtk_text_buffer_insert_at_cursor(GTK_TEXT_BUFFER( pbMessageBuffer ) ,
          sz, -1);

First a problem:
When I'm adding text the latest text appear below the displayed 
viewport. I have to scroll down to see the added messages. Is there a 
simple way to get the message window to scroll to the bottom (where the 
message is added) when inserting a new message?

Then a question:
After a while the message buffer will be really big. Can I, in a simple
way, pop off the top of the buffer when it's unnecesarry big? (say 100 
lines or something). Or do I have to make a message queue system, or 
something? (In case yes on the last question: Is there a glib datatype I 
can use for this?)

-Øystein