Hi all,
Long tome without talking with you; so busy with my new work :(:
I want to share my purpose of implementation for new pan calendar view using
Clutter. Maybe the visual design will not give much information; so I'll
write how I think new implementation will work.
I would try to implement , if possible, a little bit independent from
Geeqie; maybe such a embeded widget; so any other program could use it.
By the way; i'm using for sure filedata class and options from Geeqie; and I
would like to use Exif module too; to get Exif information from pics.
As we previously discussed with Vladimir; I'll use ClutterTexture instead
Image or ThumbLoader ; as well no pancache data will be used at this time
because of time limitations . Sorry :(.
Ok: here's how I think it should work:
- We have a main stage ( maybe an embedded one to a GTK widget ); which is
called from Geeqie; passing a Filedata.
- PAN_THUMBAIL_SIZE information could be obtained from Geeqie main program.
- Main Stage will have a list of Cells. Cell is a concept that has worked
well in my work . It's a container ; which has a list of children and has a
parent. ( for example; I'll have a GList of Cells with the concept of 'year'
; whose have a list of childs with the concept 'month'; and so on. This can
be directly implemented with clutter, using CONTAINERS and a new concept in
clutter 1.0 called
clutter_actor_group<http://www.openismus.com/documents/cluttermm_tutorial/1.0/docs/tutorial/html/sec-containers.html#figure-actor-containers>;
which allows to propagate changes in clutter containers parents to their
childs.
- Then we have items. Items can be different classes; Image, thumbnails or
'Other'. Other primary will refer to a file that is not an image ( but I
will like to do it in a way anyone could extend Item subclasses). Images are
mainly ClutterTexture; which it would be great to add access to Exif
information ( maybe extending ClutterTexture to someting like
clutterTextureExif; we'll See...).
- Associated to 'Item' class I would like to implement a Heuristic Class. As
I discussed previous emails; I think that we should look for some kind of
'heuristics' to put 'relevance' in pics viewving; when there is a draw
between sort criteria selected by user; mainly when we don't exif
information. For instant; if 1000 images were copied in a directory at same
time; 'relevance' could be higher in those ones which user acess more times
( timesClicked ) . If later we allow to have ' Categories ' ; we can also
have a look in which ones user access more; and then show first thumbnails
corresponding to that category in thumbnail preview.
There just some ideas ; you can tell me what do you think about it; or if it
is just a very bad idea :) .
- I will also implement a method Show(). It will be make the image visible .
For Image class; it will be mainly a call to Show_actor() method. Images
should have already loaded ClutterTexture using path string! .Clutter
documentation says that "no memory is used when an actor is not shown". So I
think we can pass over PanCache ( at this time!) ; and limited it to only
Show() actors which are inside the area of user visualisation; and Hide()
the other ones. Having Actors in containers in a way of
Year-Month-Days-hours ; for example; will be a good guideline to know when
we have to show or hide actors.
- Navigation will work as previously we talked about it:
- keys '+' and '.' will show more or less thumbnails in the selected
year/month/day.
- Enter key pressed in a selected 'Cell' ; will navigate to its child
cell. ( month->day ; for example). Del key ( <--- ) will be a good one to
navigate backwards.
- Others keys will be used to show full screen image; and similar
functionality that offers geeqie.
- Basic image manipulation will be implemented using clutter methods.
- Finally , I would like to talk about Object Orientated programming.
Do you think it would be a great idea to work in this way with Geeqie from
now ?
Clutter is now offering C++ support programing (
clutermm)<http://www.openismus.com/documents/cluttermm_tutorial/1.0/docs/tutorial/html/sec-cluttermm.html>.
; allowing static classes, handling exceptions, etc.
It will also allow to implement many methods with worrying over which item
are we using it.
for ( int i = 0 ; i < list.size() ; i++)
{
(Item* )list[i]->Show();
}
It's just strange for me to work with a so complex program as it is Geeqie
in plain C instead object orientation programming;using so many structs{} .
Is there any reason to continue using plain C; or it will be a good idea to
implement new pan calendar view in C++?
Well; it's lot of information. If you like to add any comments; please do it
now; because I have to start implementation early because my project
deadline is in December. I would like to start implementation next week.
Thank you very much for reading ;)
Óscar.
-
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