Ext JS defines three basic types of components
ext.Componentext.Containerext.ViewPort
The base class for Ext JS UI controls is ext.Component. Components are
registered with the ext.ComponentMgr at construction time. They can be
referenced at any time by id using the Ext.getCmp utility function. Component
classes are required to define a static property named "xtype" that is used by the component
manager to determine the runtime type of a component given in JSON notation. Note that when
you use EXML to declare your components, the Jangaroo
framework will take care of that for you.
Components are nested in containers of class ext.Container which is a subclass
of ext.Component. Containers manage the lifecycle (that is, control creation,
rendering and destruction) of their child components.
The top-level component of Studio's component tree is
ext.Viewport, which represents the viewable application area of the browser.
The API documentation of Ext JS is available at
sencha.com. Specifically,
the documentation of Ext.Component provides a list of component types available
in Ext JS. It is also worth looking into the API documentation of ComponentMgr,
Element, and the Ext utility class.
 |  |  |
 |