Enlightenment CVS committal
Author : dj2
Project : e17
Module : libs/ewl
Dir : e17/libs/ewl/doc/tutorials/widgets
Modified Files:
ewl_mvc.dox
Log Message:
- add part of MVC tutorial
===================================================================
RCS file: /cvs/e/e17/libs/ewl/doc/tutorials/widgets/ewl_mvc.dox,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -3 -r1.1 -r1.2
--- ewl_mvc.dox 26 Feb 2008 04:24:10 -0000 1.1
+++ ewl_mvc.dox 26 Feb 2008 05:49:21 -0000 1.2
@@ -1,4 +1,49 @@
/**
* @addtogroup Ewl_MVC
* @section mvc_tut Tutorial
+ *
+ * The Model-View-Controller (MVC) design pattern is commonly used to separate
display,
+ * data and control code. The MVC concepts are used in Ewl for several widgets
+ * including Ewl_Tree, Ewl_List and Ewl_Combo. This makes it a lot easier to
+ * update and store the data for those lists as the Ewl widget doesn't care
+ * about the internal representation.
+ *
+ * @section MVC Concepts
+ * The basic MVC idea in Ewl is that we don't care what your data is. We don't
+ * care how it's stored, how it's sorted or when you load it. When your data
+ * changes you signal the MVC widget as dirty and it will redraw. As the
widget is
+ * re-drawn it will ask you to give it information for each row/column as
needed.
+ *
+ * This can add a bit of extra work on the application end but provides for a
lot of
+ * flexibility. We've also created a few helper functions to generate common
+ * models and views for you so you don't necessarily have to create these on
your own.
+ *
+ * There are two classes, along with the Ewl widget you're interested in, that
you
+ * need to deal with when working with MVC widgets. These are:
+ *
+ * * Ewl_Model
+ *
+ * * Ewl_View
+ *
+ * These classes will provide the pointers to the functions to call when
+ * the containers require information.
+ *
+ * @code
+ * Ewl_Widget *list;
+ * Ewl_Model *model;
+ * Ewl_View *view;
+ *
+ * model = ewl_model_ecore_list_get();
+ * view = ewl_label_view_get();
+ *
+ * list = ewl_list_new();
+ * ewl_mvc_model_set(EWL_MVC(list), model);
+ * ewl_mvc_view_set(EWL_MVC(list), view);
+ * ewl_mvc_data_set(EWL_MVC(list), ecore_list_new());
+ * @endcode
+ *
+ * In this example we're creating a simple Ewl_List widget and using a helper
+ * method to create a model to work with Ecore_LIst data. In this case our
list
+ * is storing string objects so we can use the provided ewl_label_view_get()
to get
+ * a pre-created view object.
*/
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