Re: about scrolling

["A. Pagaltzis" <pagaltzis gmx de>]

Hi Dimitar,

* Dimitar Kenanov <kenanov minet uni-jena de> [2007-05-23 12:50]:
> i have a quation about scrolls. I have a page in a Notebook
> with for example 70 widgets inside. I made a Find function to
> find the widget i want. I find it. But then how can i make so
> that when i find it the page to scroll automaticaly to this
> position.

You ask the widget for its `->allocation`, then go up the tree of
containers, adding their X/Y positions to the widget’s position,
until you get to the ScrolledWindow widget. Thus you get the X/Y
position of the widget within the ScrolledWindow.

To scroll, you need to ask the ScrolledWindow for its HAdjustment
and VAdjustment, then do `->set_value` on them.

However, I don’t know how to ask a ScrolledWindow for how much
virtual area it has, which would need in order to convert from
the X/Y coordinates of the widget to a relative position in the
upper..lower value range of the Adjustments.

At least that’s roughly how it should work. I haven’t written
Gtk2-Perl code in a while, so I’m probably wrong in various
details. However, that should be the right general approach.

Regards,
-- 
Aristotle Pagaltzis // <http://plasmasturm.org/>