Accessing View Controller from Component Controller in the same Web Dynpro Component
If you wish to access the View Controller from methods on the Component Controller of a Web Dynpro component, you can do this very easily following the steps below:
Suppose we have a view called V_MAIN and a context node on that view called NODE_1.
1) Create a global attribute GO_V_MAIN_CTRL of type IF_WD_VIEW_CONTROLLER in Component Controller’s attributes tab;
2) Get the reference of View Controller in WDDOINIT method of view V_MAIN as below:
wd_comp_controller->go_v_main_ctrl ?= wd_this->wd_get_api( ).
Now, you can access the View Controller in any Component Controller method. As an example, you can access the View Context Node as below:
DATA lo_context TYPE REF TO if_wd_context.
DATA lo_root_node TYPE REF TO if_wd_context_node.
DATA lo_child_node TYPE REF TO if_wd_context_node.
lo_context = wd_this->go_v_main_ctrl->get_context( ).
” get root node
lo_root_node = lo_context->root_node.
” get child node
lo_child_node = lo_root_node->get_child_node( name = ‘NODE_1’ ).
You can read more about other methods accessible by the IF_WD_VIEW_CONTROLLER here: IF_WD_VIEW_CONTROLLER – Web Dynpro for ABAP – SAP Library
Hope that helps!
Just one correction here.
Not from all Component Controller method you can access the View Controller, you cannot get access from inside COMPONENTCONTROLLER's WDINIT method, because that would be called before VIEW's WDINIT and at that time because of empty reference it will through dump.