On Tue, Oct 30, 2001 at 04:47:47PM +0530, Arun wrote:
> Hi James,
>
> But i am thinking of a situation where i dont know what the next widget is
> (when connecting the signal).Consider extending GtkEntry/GnomeEntry. I want
> to use it as any other widget. During packing of widgets we wont say what the
> next widget is. Focus cycling will work with out that.
>
> Is there any way one widget find out which widget comes next when a focus change
> happens ?
>
Not James, but I've solved a similar problem -- if all the
widgets of interest are children of a container, you can use
the appropriate get_children to get a list of them. Depending on
how much state information you're saving, finding the "next"
one may be as easy as retrieving list[index+1].
In the more general case, you have to define for yourself
what "next" means. Python makes it quite easy to build a
a hierarchy of stateful logical "wrapper" objects which
contain the pyGTK objects. These highest-level objects can
then have arbitrary logical relationships designed into them,
including customized predecessor/successor relationships which
are not constrained by the structure of the GTK widget tree.
There's some overhead, of course, but it's probably small.
-- A.
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