Re: Scroll to widget?

[API <apinheiro igalia com>]

From: Lindley M French <lfrench1 gmu edu>

> I've got a GtkScrolledWindow which contains an hbox that in turn contains a number of other widgets, and each of those widgets has an ability to become "active" in some sense.
> 
> What I'd like to do is arrange things so that when a particular widget becomes active, the ScrolledWindow is adjusted to ensure that the active widget is entirely visible (assuming it's small enough of course).
> 
> This means that I need to get the position of the widget in ScrolledWindow->bin_window coordinates, as I understand it. But I can't figure out which combination of functions I need to do this.
> 
> Any help?

GtkWidgets has already support for center on focused objects (I hope
that your "active" means that).

The implementation of this feature are related with this functions and
signals:
http://library.gnome.org/devel/gtk/stable/GtkWidget.html#gtk-widget-child-focus
http://library.gnome.org/devel/gtk/stable/GtkContainer.html#gtk-container-get-focus-child
http://library.gnome.org/devel/gtk/stable/GtkContainer.html#GtkContainer-set-focus-child

Anyway, as you are using a common GtkScrolledWindow, probably you only
require to use the function:
http://library.gnome.org/devel/gtk/stable/GtkContainer.html#gtk-container-set-focus-vadjustment

LibgnomeUI has a example. It has a GtkScrolledWindow, and inside a
hbox with several buttons. Each time you click on the button, the
scrolled window centers on it.

The example is libgnomeui-2.24.1/test-gnome/testgnome.c
(I got the code using "apt-get source libgnomeui", so probably you can too)

I hope this helps.

BR

===
API (apinheiro igalia com)