On Tue, 21 Aug 2007 00:58:58 +0200 Simon TRENY <[EMAIL PROTECTED]> babbled:
> Hi,
>
> I've seen in Evas.h that most of the methods of Evas_Smart_Class are
> marked as to-be-deleted in the future ("FIXME: DELETE ME"). This
> concerns show(), hide(), color_set(), clip_set() and clip_unset().
mmm - basically those can probbably be handled by intercepts or events.
color_set, clip_set/unset should "just work" as expected. i just can't see any
other really good reason to not have them do the obvious - same with show and
hide.
> I think it will be indeed a really great thing to do since when we
> implement these methods for a new smart-object, we basically always do
> the same thing (i.e clipping member-objects against the parent's
> clipper in clip_set(), hiding the member-objects in hide_set()...). It
> will also simplify a lot the code of Etk_Widget as I tried to make
> these things done automatically but since Etk doesn't have access to
> Evas internals, it is quite a mess.
yup. so instead of creating a clip object and add it to the smart - then clip
all smart members to the clip to handle color_set - is tedious.
> I'm willing to try to implement those things in Evas, but first I'd
> like to be sure of the behaviour to respect:
>
> - A member-object should be "really" visible only if its parent is
> visible and if it is set as visible (evas_object_visible_get() == 1).
> It would remove the need for show() and hide()
correct. the parent smart object visibility should be a "master control" for
all children. hidden children will never be visible - shown children are
visible ONLY if the parent is visible too.
> - A member-object should be clipped by the intersection of its clipper
> and of its parent's clipper. It would remove the need for clip_set()
> and clip_unset()
correct. same with clip colors. a smart object's parent color should multiple
all child objects like a clip object's color multiplies all clipees (objects
clipped by the clip object). basically the smart object is an implicit parent
clip etc. proxy for children.
> - The member-objects' color should be automatically multiplied by its
> parent's color at rendering (--> no more need for color_set()).
correct.
> Actually, I'm not sure about this last point. What if the user would
> absolutely want to have a member-object always green for example,
> regardless to the color of its parent? I can see a use for this: in
> estickies, the window is semi-transparent while the text is opaque,
> and yet, the text is a member-object of the window.
no - always. parents should control children. fading out a button that contains
an icon won't work unless you color multiply always.
> Are you ok with this?
> Do you have any other requirements for the smart-objects?
currently- not really. i know this thread has gone on a bit - but the arguments
for show/hide etc. are there, but can be done by events (on a hide - stop all
animation - or even destroy child objects to save memory/space and on show
create them again - but do via an intercept or event callback).
as a fist step - lets not remove, but if show/hide etc. are NULL - then apply
the above default behavior.
> Regards,
> Simon TRENY <MoOM>
>
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--
------------- Codito, ergo sum - "I code, therefore I am" --------------
The Rasterman (Carsten Haitzler) [EMAIL PROTECTED]
裸好多
Tokyo, Japan (東京 日本)
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