Re: GtkTreeView in VBox

[Rhishikesh Joshi <rhishikesh joshi azingo com>]

Hi,
I have also faced a similar situation in which case i need to pack a 
treeview inside a VBox.
I would not mind the treeview apis not working but the packing is 
something i am looking to keep. The scrolling of the VBox works fine for 
smaller sizes of the TreeView. But when the treeview consists of 
elements greater than a certain number of elements (450) in my case, the 
scrolling goes awry between adjustment values 16000 and 27000 (sounds 
strange, i know.).

Please help. Any suggestion is welcome.
Thank you for your time.


Kristian Rietveld wrote:
> On Thu, Jan 7, 2010 at 1:24 PM, Amol Kulkarni <amolgkulkarni gmail com> wrote:
>   
> > Is it possible to add GtkTreeView inside VBox and then add that VBox to
> > ScrolledWindow using gtk_scrolled_window_add_with_viewport(sw,vbox).
> >     
>
>   
> > Is this expected/supported use case or am i doing something wrong here?
> > Thanks for your time.
> >     
>
> No, it's not a supported use case.  GtkTreeView and other scrolling
> widgets such as GtkIconView are meant to be placed directly in a
> GtkScrolledWindow.  Not doing so will, for example, break scroll
> commands given by GtkTreeView itself, since it is not directly
> connected to the GtkScrolledWindow anymore.  Such scroll commands are
> given when you are setting a cursor on a row and want to make that row
> visible, automatic scrolling during drag selection, or by the
> application programmer using the gtk_tree_view_scroll_to_cell() and
> related functions, etc.
>
> Another reason why this is a bad idea is memory usage, although I
> cannot tell for sure whether this still holds for GTK+ 2.18 and later.
>  For earlier versions of GTK+ a large X window has to be allocated if
> you are placing a GtkTreeView with a large number of rows in a VBox or
> similar container.
>
>
> regards,
>
> -kris.
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