[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[E-devel] Evas Smart objects



Hi all,
i have some doubts-ideas about evas smart objects,

1. the API
in order to add an object to a smart object you have to do
_member_add(o, s) and to delete _member_del(o,s). On the code of both
an evas smart object actually stores the members on a list but theres
no function to retrieve them, Evas_List * _members_get(s), so when you
code an evas smart obejct and you need to keep track of the objects
you have, you need to duplicate the list and code a different function
to do that.

2. the implementation
ive been playing with smart objects for evoak, so ill explain the case:
my goal was to create a container, an evas objects container. the
problem i see is that the evas smart objects where thought for a
static environment, on the callback of a smart object add you create
the static objects inside, store them on your list and when something
happens (move, resize, whatever) you act accord with that and apply
that to your internal objects. thats fine. but i thought the idea of
the smart objects was to actually be a sub canvas of evas, so when you
add an object: evas_object_add(evas) and then add it as a member of
smart object it is no longer part of the evas objects but of the smart
objects, so for example a layer change on that is actually a layer
change inside the layers of the sub canvas, wich in fact the subcanvas
is in one layer. but not in the evas canvas layers. another example is
that when you move an object what is member of a smart object it
should move relative to it, no relative to the evas canvas. dont know
if i explain myself correctly :)
so a problem with this is that if you want to move an object that is
part of smart object you should call a different (own) function to
calculate all the relative coordinates and move it there.

so my question is, the current aproach of evas smart objects in the
correct way? or my use case is just an specific and doesnt make sense
to change the behaviour of the smart objects?
maybe a solution could be to add callbacks for a move, resize,
layer_set, whatever, but not for the smart object but for the elements
of a smart object.

btw, if i made a wrong assumption about smart objects please forgive
me :) havent used them a lot :)

bye