From: Bluezery <ohpowel@gmail.com>

From: Bluezery <ohpowel@gmail.com>
Subject: [E-devel] [Patch][elm_map] Add overlay in the map

I made a overlay APIs in the map. This will replace the marker APIs.
I hope that markers will be deleted before elementary 1.0 release.
This was discussed before in
http://marc.info/?l=enlightenment-devel&m=132685497711772&w=2

Marker only supports layout style overlay. So only icon and image are
suitable for marker.  For now on, overlay can support any evas object
and also layout style.
Currently overlay support default, bubble, and class types.  And more
types will be added (Polyline, Polygon, scale, POI etc.).
I made a Elm_Map_Overlay opaque structure for handling general overlay
properties (hide, pause, show, etc.) and coordinates or internal
content (icon, content, etc.) for those different types.
Class type overlay is something like mixture of previous marker group
and marker class.
If member overlays in the same class are closed, they will be grouped.
(Same functionality as previous maker group.) The group's properties
and contents are defined by using general overlay functions.  (New
functionality)
This defined properties and contents can be be propagated to member
overlays appended to this class.  (Same functionality as previous
maker class.)

There are some missing functionalities remained. Group callbacks are
not supported yet in the overlays.
So images inside group bubble can not be shown. I will implement this
feature.

After this patch, I will fix signals and function names before
elementary 1.0 releases.

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/elementary@68672 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33