Re: Control what happens when GtkTextView is resized: keep the bottom part visible

[Todor Todorov <ttodorov gmx net>]

Well, since resizing the widget by itself does not do any scrolling, 
whichever value you get from the adjustment _is_ the current scroll 
value. In the same way you have the function *_get_upper(), you have 
*_get_lower() and *_get_value()... Just change the computation however 
you need it to be. Did you even looked up the functions I used in the 
API docs? You would have seen the rest....

Hope that helps.

On 11/13/2009 12:49 PM, Eduardo M KALINOWSKI wrote:
> Todor Todorov wrote:
>    
> > Bind a callback to the "size-allocate" signal of the scrolled window:
> >
> > #include<gtk/gtk.h>
> >
> > void cb_autoscroll_to_end( GtkWidget* widget, GtkAllocation* allocation,
> > gpointer user_data)
> > {
> > <snip>
> > }
> >
> > After you create the scroll window in main(), connect like:
> >
> > g_signal_connect( scr1, "size-allocate", G_CALLBACK(
> > cb_autoscroll_to_end ), NULL );
> >
> > It will work with every scroll bar policy (always, none, auto)....
> >
> >      
> Thanks for that, it works for keeping always the bottom part displayed.
>
> However, I'd like something slightly more complex: if the scroll bar is
> not at its end, that is, some other part of the text view is being
> shown, I'd like that part to remain at the end, shrinking the bottom
> widget at the top but keeping the bottom part displaying the same thing,
> instead of resizing the bottom and moving it.
>
> One way to do that might be to check the value of the GtkAdjustment
> before it starts to be resized and then, in a callback like you posted,
> set the new value to display the desired part. But how can one obtain
> the value before the resizing starts?
>
>