Re: Auto-scrolling up or down a GtkScrolledWindow

[Richard Boaz <riboaz xs4all nl>]

Hi,

first, there seems to be some information missing from your  
question.  namely, what type of widget is the child the scrolled  
window is holding?

because, your positioning requirement is a requirement for the child,  
not the scrolled window, the scrolled window simply acts as a helper  
container for child widgets without native scrolling support, in that  
the scrolled window does not have access to modifying the display  
position of the child's contents.

for example, if the child widget is a TreeView (columns of data), you  
can achieve what you are trying to do with the following calls:

char	row_num[5] = "100";
GtkTreePath	*path = gtk_tree_path_new_from_string(row_num)
gtk_tree_view_scroll_to_cell(GTK_TREE_VIEW (hdrVIEW), path, NULL,  
TRUE, 0.0, 0.0);
gtk_tree_view_set_cursor(GTK_TREE_VIEW (hdrVIEW), path, NULL, FALSE);

see the documentation for GtkTreeView for further details.  or,  
alternatively, see the documentation for the child widget relevant  
for your scenario and available support for positioning its contents.

cheers,

richard

On Mar 28, 2006, at 8:58 PM, Meli Vázquez wrote:

> Hi again guys.
>
> I have a GtkScrolledWindow which contents I refresh periodically. I
> would like it to scroll down each time I update its contents.
>
> I've tried something like this:
>
> VScrollBarPos = gtk_scrolled_window_get_vadjustment (..);
> VScrollBarPos->value--; (or value++)
>
> each time I write in it. But it doesn't seem to work. The scroll
> window doesn't scroll down (though I can still do it manually).
>
> I also tryied with combinations of:
> - gtk_scrolled_window_set_vadjustment(..)
> - gtk_adjustment_set_value        (..)
>
> But still doesn't work.
>
> When debugging I saw that upper and lower bounds don't change (though
> I still can scroll up and down manually in the GUI).
>
> What am I doing wrong? Why isn't it working?
>
>
> Thanks again in advance.
> AV.
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