Developing the Web Dynpro Component 

In the next step, the Internal component is included in the Embedder component, which – at runtime – should react to the event triggered by the inner component Internal. To achieve this, the use of the inner Web Dynpro component must first be declared in the embedding Web Dynpro component. Then, the component interface controller of the inner Web Dynpro component is visible to the embedder so that a controller contained in it (for example, view controller) can subscribe to the event declared in the inner Web Dynpro component. 

The embedding Web Dynpro component controls the lifetime of its used Web Dynpro components. The user of the example application can directly create and exit the inner component in the ControlPanel view using the buttons Create Component and Destroy Component. Accordingly, the view of the Internal Component is visible in the lower view area only after it has been created. After exit, it is automatically replaced by an empty view, which, however, does not have to be included in the modeling of the view composition.

Process Flow

The next sections are structured as follows:

...

       1.      Declarative development of the ControlPanel view controller:

                            a.      Declaration of controller use of the type Internal Web Dynpro Component.

                            b.      Declaration of the use of a component interface controller

                            c.      Methods declaration with event subscription

                            d.      Context structure

                            e.      Actions for creating and deleting the embedded Web Dynpro component Internal

       2.      Layout of the ControlPanel view

       3.      Implementation of the ControlPanel view controller

 Now continue with the section Setting Declarations in the ControlPanel View.