.. _pages/data_binding:

Data Binding
************

Data binding is a `concept <http://en.wikipedia.org/wiki/Data_binding>`__ by
which two data items are bound, so that changes to one are propagated to the
second, and vice versa. This requires the possibility to detect such changes
during runtime. In qooxdoo, :ref:`class properties
<pages/understanding_properties#understanding_properties>` fulfill this
requirement.

Using data binding allows you to e.g. keep two widgets automatically
synchronized over the runtime of your application, although they might be
spatially separated and have wildly different visual representations (e.g. a
text field and a spinner).

.. toctree::

   data_binding/data_binding
   data_binding/single_value_binding
   data_binding/controller
   data_binding/stores
   data_binding/models
   data_binding/events