Enlightenment CVS committal
Author : technikolor
Project : e17
Module : docs
Dir : e17/docs/cookbook/xml
Modified Files:
edje_recipes.xml
Log Message:
Edje template.
===================================================================
RCS file: /cvsroot/enlightenment/e17/docs/cookbook/xml/edje_recipes.xml,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -3 -r1.3 -r1.4
--- edje_recipes.xml 2 Jul 2004 22:17:45 -0000 1.3
+++ edje_recipes.xml 29 Jul 2004 10:08:20 -0000 1.4
@@ -4,49 +4,23 @@
<title>Edje</title>
<para>
-Edje is a complex graphical design and layout library.
+Edje is a complex graphical design and layout library. It's purpose is to abstract
every element of your Evas
+applications interface from the code itself.
</para>
<para>
-It's purpose is to be a sequel to "Ebits" which to date has serviced the needs of
-Enlightenment development for version 0.17. The original design paramteres under
-which Ebits came about were a lot more restricted than the resulting use of
-them, thus Edje was born.
+An Edje application falls into two parts: the C code that makes up your application
and an Edje Data
+Collection (EDC) that describes every element of your interface. The two are
connected by signals
+that are emited from your EDC and recieved by callbacks in your application code.
Using this signal
+model the application code is completely uninterested in exactly what your interface
looks like, just
+so long as it gets a signal. And because signals are proccessed by callbacks, there
is no requirement
+that your interface send every signal avalible, making large scale applications and
"demo" size applications
+possible with a single binary. Whether your interface uses buttons or a drag-bar in
order to send
+data, it doesn't matter to you application.
</para>
-<para>
-Edje is a more complex layout engine compared to Ebits. It doesn't pretend to do
-containering and regular layout like a widget set. It still inherits the more
simplistic
-layout ideas behind Ebits, but it now does them a lot more cleanly, allowing for easy
-expansion, and the ability to cover much more ground than Ebits ever could. For the
-purposes of Enlightenment 0.17, Edje should serve all the purposes of creating visual
-elements (borders of windows, scrollbars, etc.) and allow the designer the ability to
-animate, layout and control the look and feel of any program using Edje as its basic
-GUI constructor. This library allows for multiple collections of Layouts in one file,
-sharing the same image database and thus allowing a whole theme to be conveneintly
-packaged into one file and shipped around.
-</para>
-<para>
-Edje, unlike Ebits, separates the layout and behavior logic. Edje files ship with an
-image database, used by all the parts in all the collections to source graphical
data.
-It has a directory of logical part names pointing to the part collection entry ID in
the
-file (thus allowing for multiple logical names to point to the same part collection,
-allowing for the sharing of data between display elements). Each part collection
consists
-of a list of visual parts, as well as a list of programs. A program is a
conditionally run
-program that if a particular event occurs (a button is pressed, a mouse enters or
leaves
-a part) will trigger an action that may affect other parts. In this way a part
collection
-can be "programmed" via its file so as to hilight buttons when the mouse passes over
them
-or show hidden parts when a button is clicked somewhere. The actions performed in
changing
-from one state to another are also allowed to transition over a period of time,
allowing animation.
-</para>
-
-<para>
-This separation and simplistic event driven style of programming can produce almost
any look
-and feel one could want for basic visual elements. Anything more complex is likely
-the domain of an application or widget set that may use Edje as a conveneient way of
-being able to configure parts of the display.
-</para>
+&edje_simple;
</chapter>
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