WebUI: Data sharing / Component Controller

Hi All,
I am working on CRM2007 WebUI, I have two components( comp1 and comp2 ). I want to get the details entered in a view of comp1 to another view in comp2 after navigation, the context node corresponding to the details ( data ) is already in the component controller of comp1.
Now, how to proceed for getting the details I entered in the view of comp1 to a view of comp2 after navigating to the view in comp2 ?.
Any help/hint highly appreciated,
Thanks, Sudeep..

Hello Sudeep,
It depends on whether you have comp 2 embedded in comp1 or comp2 substitutes comp1 after navigation. In the first case you can enable data binding between component context nodes in WD_USAGE_INITIALIZE method. In the second case you have to pass your data via the oubound/inbound plugs in the iv_collection parameter of your OP* and IP* methods. So, in outbound plug you send the data from comp1 and in the inbound plug of comp2 you receive the data.
Best Regards,
Yevgen

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Accessing component controller node

Hi..Experts,
How to access component controller node from WINDOW (please give me a sample code ) .
I want to set data to component controller node.
please help me.
Regards,
Siva

Hi siva,
Its very easy u need not to do any extra coding to share data between window context and component controller context.
Step 1) u create the node in component controller and map this node with window context.
step 2) Now in any method of window u write the set_attribute or bind_table statement ,your data will automatically transported to component controller .
So u dont need to do any extra coding for this.
Hope this will help your requirement.
regards
Pankaj Giri

To fetch data from a standard component through Component Controller

Hi,
I have a requirement in which i have to access and display a standard view of a standard component in a Custom Component.
I am able to display or configure that view on Custom Component by using Component Usage and Component Interface. But unable to populate the data in that view. Although i have exposed a context node in the standard component and created the same context node in my custom component in the Component Controller and using its method WD_USAGE_INITIALIZE to bind them.Please, provide some pointers on it.
Cheers,
Sharad

Hi Sharad,
The data will show up only if you put them there. May be the standard component itself gets the data from some where else. Usually, these data are provided by the component controller. For example, the component controller contains the header entity and the used component has access to the header entity via binding and shows all item entries fetched via relations(usually this is done in on_new_focus method). If the binding is there, but no data ia available, it will stay empty.
Check a standard main component which uses the standard component that you are using and look at how they are establishing the connections.( component/custom controller bindings, on_new_focus methods,,)
Regards,
Arun Prakash

Accessing component controller data

Hi I have created a guided procedure with 3 views in it. I will enter the object id in the first view . I want to read this object id in the component controller
and get some data this data will be accessed by remaining views to populate the fields in the views when they are displayed .please let me know
how to update the fields in the view to the component controller and vice versa.
regards
luxmi

Hello Lakshmi,
I will use BTHeader and BTItem objects as example.
The easiest approach would be to create BTHeader and BTItem context nodes in all views and in the component controller. Mark BTHeader as "Always create instance" - will be needed for data entry in the first screen.
After that, bind view context nodes to the controller context nodes (BTHeader to BTHeader and BTItem to BTItem).
In component controller create BTItem as related to the BTHeader (with proper relation from BOL).
Now, when you enter the value in the first view read the BTHeader entity using the BOL framework and set the BTHeader context node collection to the read entity.
(The coding was not checked, might not work just by using COPY + PASTE).
DATA:
lv_order TYPE crmt_object_id,
lv_order_guid TYPE crmt_object_guid,
lo_core TYPE REF TO cl_crm_bol_core,
lo_btheader TYPE REF TO cl_crm_bol_entity.
lo_btheader = typed_context->btheader->collection_wrapper->get_current( ).
lo_btheader->get_property_as_value(
EXPORTING iv_attr_name = 'OBJECT_ID'
IMPORTING ev_result = lv_order
SELECT SINGLE guid
INTO lv_order_guid
FROM crmd_orderadm_h
WHERE object_id = lv_order.
CHECK sy-subrc = 0.
lo_core = cl_crm_bol_core->get_instance( ).
lo_btheader = lo_core->get_root_entity(
iv_object_name = 'BTHeader' " here the real root entity is BTOrder, this is to simplify the example
iv_object_guid = lv_order_guid
typed_context->btheader->collection_wrapper->clear( ).
typed_context->btheader->collection_wrapper->add( iv_entity = lo_btheader iv_set_focus = abap_true).
Now, the parameter IV_SET_FOCUS = abap_true will trigger the ON_NEW_FOCUS method in your component controller's BTItem context node. There you can put the desired logic to read data based on the value entered in the first view.
After that, simply update the BTItem collection with all the BOL objects that you read and they will be visible in all the views. Together with the BTHeader that you already read.
Hope this helps.
regards

Not able pass the data from component to other component.

Hello All
I am not able pass the data from component to other component.
I have done like this.
1 Main Component (Parent component ) having below two child components.Embeded as used components.
2)     Search Component and Details Component
3)     In the Search Component having buttons, Say : Button u201CXu201D on click of button I am navigating to Details component view through FPM.
4)     When I am clicking above button u201CXu201D raising the event to call the parent   business logic method, there I am getting Structure with values and binded this structure to the node and Mapped this node to the Details component interface node. FYI : I kept the debugging point Structure is having data , I had set static attributes table to node instance.
5)     In the Details component node data is not coming mean empty.
Thanks in Advance.
Br-
CW
Edited by: CarlinWilliams on Jul 4, 2011 9:21 AM

Hi,
When you use input Ext. check that the parent component should not be used as used component in child component.
Only in the parent component the child components should be used as used components and the usage has to be created for the
Child Components and the binding of the Node should be done from comp. controller of parent component to child node
by which you will be able to see double arrow against the node.This should work
Thanks,
Shailaja Ainala.

How to fire event in view controller from component controller.

I have a component usage that fires an event wich i have subscribed in the component controller.
iv_usage->subscribe_event( iv_event_name = 'TAKE_IT'
iv_handler = me ).
After the event the method IF_BSP_WD_EVENT_HANDLER~HANDLE_EVENT in the component controller is called.
method if_bsp_wd_event_handler~handle_event.
endmethod.
The usage component is opened as a popup window. After pressing a button, the data is transfered via context node binding to the calling component. But now i want to close the popup.
My intension is to fire a event for the view controller in the IF_BSP_WD_EVENT_HANDLER~HANDLE_EVENT method that closes the popup.
Is this possible?
Or let me explain it this way:
I want to close a popup after a button in the popup is pressed.
best regards
Jürgen

Hello Juergen
I am assuming your target pop-up is of type ref to IF_BSP_WD_POPUP.
1.Make this a view controller class attribute.
2. After the code to create the pop-up, you can add the following block :
gv_target_popup->set_on_close_event( iv_view = me iv_event_name = 'CLOSEPOPUP').
3. Now define event handler EH_ONCLOSEPOPUP where you can write the logic for on_close.
You can access the same reference gv_target_popup at the event handler level as well.
Hope this helps.
Regards
Nisha

Bind Variables and Shared Component Report Query

I have a query in a region report which I have replicated to a shared component report query.
Both queries reference page items as bind variables in the where clause.
The report region on screen shows the correct results but the report query shows "no data". This is the case when running "Test Query" and "Download XML data" from the shared component report query definition. If I hardcode the variable names I get rows returned, If I use bind variables - and specify the values for these variables I get no data. THe XML file contains the tags for each bind variable I have specified but has no data between the tags. I have Ticked the box to include application and session state but it appears that the bind variables are not being used.
When I use my report query in the application (URL tied to a button) I get the same problem, the binds are not being passed to the report query.
Can someone please clarify if this is a bug or not? And if not, how can I get it to work.
I am using Apex 4.0.2
Thanks
Kathryn

Hi
To confirm, yes I selected the bind variables. I used these in the report layout, but the xml file has them as empty i.e.
<P0_START_DATE><P0_START_DATE/> with nothing in between.
IN the Test Query section, if I put real values in the boxes for the bind variables, I get no data found. If I hardcode the values into the query, I get the data.
I've repeated the create report query many times and have created a report layout in RTF. I can use the layout with my region - in the print attributes and the layout works with the query but I need to create a PDF using 2 queries - ROWSET1 and ROWSET2. I can generate the XML but the values in the rows are all empty. When I use the layout with a report query instead of the region, I get no data even though I have used the same sql and have selected the bind variables. I was using variables from page items on page zero but have also tried using page items on the current page, the result is the same.
I need to use a report query and a report layout as I need data from 2 queries in the PDF.
I looked at your demo - what happens if you add a second sql query to the report query - is there any chance I can look at the back end (developer access?)
Thanks for your input
Kathryn

Calling a method in the view controller from the component controller

Hi
Is there anyway to call a method in the view implementation from the component controller??
Thanks
jack

Thanks for all your replies. I want this kind of a functionality because Im trying to invove a DC (Child DC) from a Parent DC such that the Child DC's view is displayed onto the view container of the Parent DC. I have embedded using 'interface view of a component instance' in the Parent Window and am able to create the component and set usage though the onPlugDefault of the Child View.
But I observe that when i make a call from the parent, the flow is like this:
1. The wdDoInit of the Child Component Controller gets triggered first.
2. Then the wdDoInit of the Child's VIEW gets triggered
3. and THEN the onPlugDefault of the Child Component Interface View
What I had actually wanted was to Fire onPlugDefault where Im calling a method LoadData(), after which the Child DC's view must be triggered so it can display the fetched data.
What is actually happening is the view gets displayed, but no data is displayed in the view.
Right now I have just given a work around where Im triggering LoadData() of the COmponent COntroller from the wdDoInit of the VIEW.
Is there a better way to do this? I find it strange that I have to load the Data from the view.
Thanks
Jack

Declaring and accessing custom global attributes of component controller

Hi,
I want to declare some global attributes for Component Controller and initialize them in WdDoInit() method.
I have declared them under Component Controller --> Attributes tab --> after wd_context and wd_this (say G_MESSAGE).
However, when I am trying to set them in wdDoInit() method, I get compilation error saying G_MYMESSAGE is unknown and its not defined using data statement.
How do I access these attributes?
Thanks and regards,
Amey

Hello Amey,
You need to access the variable by "wd_this->g_mymessage"
Since wd_this attribute in each controller refers to interface of local controller. you could read the description of that attribute in attribute tab.
Regards
Anurag Chopra

Access to an attribute of a value node of a component controller

Hello experts,
I'm new to the area of SAP CRM Web Client UI development. My problem is probably very simple and you will surely smile about it.
I have created my own component with the value node FILE (that consists of five atributes) in the component controller. Unfortunately I have not figured out yet how I can access the value of an attribute.
The first thing I do not know is where I can find the controller-ID.
In addition, I get an syntax error Field "TYPED_CONTEXT->FILE->COLLECTION_WRAPPER->GET_FIRST(" unknown in the line with "lo_entity = me->comp_controller->typed_context->file->collection_wrapper->get_first( ).".
Currently no functionality is included in my code, because firstly I want to understand the basics.
method OP_FILEUPLOAD.
data lo_entity type ref to if_bol_bo_property_access.
data lv_file_name type string.
data lr_file_content type ref to data.
field-symbols <lv_file_name> type string.
IF ( comp_controller is INITIAL ).
 get_controller( 'xxxx' ).
ENDIF.
lo_entity = me->comp_controller->typed_context->file->collection_wrapper->get_first( ).
while lo_entity is bound.
 lv_file_name = lo_entity->get_property_as_string( 'FILE_NAME' ).
 lr_file_content = lo_entity->get_property( 'FILE_CONTENT_STRING' ).
 assign lr_file_content->* to <lv_file_content>.
 lo_entity = me->typed_context->file->collection_wrapper->get_next( ).
endwhile.
endmethod.
I hope that I will manage my "problem" with your help!
Sebastian
Edited by: Sebastian Lenz on Jun 27, 2011 2:35 PM

Hi Sebastian,
The issue is in the following line of your code:
lo_entity = me->comp_controller->typed_context->file->collection_wrapper->get_first( ).
The 'typed_context' belongs to your own component controller class and not the standard framework superclass. So, you need to replace this single line of code with something as follows (assuming that your component controller class is ZCL_CUSTOM_BSPWDCOMPONENT_IMPL):
DATA lr_coco TYPE REF TO ZCL_CUSTOM_BSPWDCOMPONENT_IMPL.
lr_coco ?= me->comp_controller.
lo_entity = lr_coco->typed_context->file->collection_wrapper->get_first( ).
The me->comp_controller reference will refer to the standard framework superclass of all component controllers and this does not have any typed_context attribute with it. The real component controller that gets created when you create a BSP component will have this attribute. That is why you need to first cast it to your own reference type before trying to access its typed_context.
And if your value node will have only single values, then you can as well do the following to access the attribute ATTRIB1 of context node node1:
DATA lv_value TYPE string.
lv_value = lr_coco->typed_context->node1->get_attrib1( attribute path = '' ).
Basically all attributes can be accessed by above code by using the right getter method.
Regards,
Shiromani

Diff between Component controller,Custome controller and View controller

hi,
Can any body tell me the following details,
1.difference between the Component controller,Custome controller and View controller in WD-ABAP.?
2.what is Lead Selection?
Regards,
Ravi

Hi Ravi.
The component controller is visbile to all views in a component. So all context nodes and methods you create here can be accessed from all views in the component. This way you can share data between the views by mapping context nodes or thru method calls. You can also mark methods and nodes as interface so that they are acessable from other components that define component usages to this cmponent.
Custom controller is quiet similar to the component controller. You can define it if you want to group some views with a custom controller for a certain functionality.
If you want to access a custom controller in a view you have to define the usage first on the properties tab of the view.
A view controller is only visible in the view itself. So all methods or context nodes you define here are only accesable by the current view.
The lead selection is in most cases the current selected element in a context node. The lead selection is used by many UI elements to determine which element has to be shown (e.g drop down).
If you have a table with single selection the current selected table row is the lead selection element of the bound context node.
SO you can get the lead selection element easily in any mthod by calling context_node->get_element( ).
Hope this clears your questions.
Cheers,
Sascha

Is it possible to serialize a web dynpro component controller?

Hi,
Is it possible to serialize a web dynpro component controller and deserialize it for use?
I have one web dynpro application WDA1 for web dynpro component WDC1. And another web dynpro application WDA2 for WDC2 will be opened in a new window triggered by a button action in WDC1.
Iu2019d like to pass the object reference of WDC1 component controller to WDC2.
I first tried to use a static member of a class object but found out that even the static member is initialized and set in WDC1, itu2019s still initial when I access it in WDC2.
Then I searched the forum and found one article Passing Object ref to Webdynpro Application while calling from BSP screen .
The recommended way is to serialize the object reference and store in a DB table, later on read it out and deserialize it for use.
I tried serialization using the following code, but when itu2019s deserialized, the result is initial.
Can anyone share some ideas on this?
Serialize
data: ostream type string,
           xslt_err type ref to cx_xslt_exception.
***** serialize model class
try.
      call transformation id
      source model = wd_comp_controller
      result xml ostream.
    catch cx_xslt_exception into xslt_err.
endtry.
Deserialize
    data: istream type string,
          xslt_err type ref to cx_xslt_exception.
    istream = ls_db_sel-obj.
    data lr_wdc type REF TO ZIWCI_BY_WDC_SERIALIZE.
    try.
        call transformation id
        source xml istream
        result model = lr_wdc.
      catch cx_xslt_exception into xslt_err.
    endtry.

When you say new window, I assume you mean new browser window. This is a separate user session then. This is why the singleton pattern doesn't work. Have you considered using a new dialog window instead of a new browser window. It will be modal, but will share the same user session as the parent window.
>Why do you choose this approach over cross-component usage ? component usage is the way webdynpro components are >to be reused.
>You can also consider using Singleton OO pattern class to share data between these two components.
Neither of these approaches will work if you are using separate browser windows. Such an approach results in two separate user sessions (perhaps even running on different application servers depending upon how you have load balancing setup) and therefore can't share data using either of these approaches.
In general the idea of serialization and then writing the string ito a server cookie or other database table is sound. I don't think you should try and serialize the component controller, however. Serialization only saves and restores public attributes - not protected or private ones. So in general a class has to be designed for serialization. The component controller is much too complex and wasn't designed for such an operation.
I would suggest instead extracting the data you want to share out of component controller or context and serializing it into a custom class and passing that to the other component.

How to populate context node of component controller

Dear People,
Is there any way i could access my custom context node of component controller in the context node class of my custom controller.
I am navigating from one component to another, Upon initial launch everything is working fine, however if i go to home page and come back. the assignment block is coming empty.
In WD_USAGE_INITIALIZE i m binding my custom controllers context node with the component controller's context node of the other component and it works fine when i load the UI. however if i go to home page and come back. the assignment block is coming empty.
Following code is in method of DO_VIEW_INIT_ON_ACTIVATION of the other componenet.
METHOD do_view_init_on_activation.
DATA:   lv_btstatus_parent TYPE REF TO cl_crm_bol_entity,
        lv_comp_ctrl      TYPE REF TO cl_btstatus_bspwdcomponen_impl.
CONSTANTS:
        lc_us_header      TYPE crmt_relation_name VALUE 'BTStatusHUserAll',
        lc_us_item        TYPE crmt_relation_name VALUE 'BTStatusIUserAll'.
lv_comp_ctrl ?= me->comp_controller.
check if relationname has been passed from outside
    gc_relation_name = lv_comp_ctrl->get_relation_name( ).
IF gc_relation_name IS INITIAL.
check type of parent to determine relationname
    *lv_btstatus_parent ?= lv_comp_ctrl->typed_context->btstatusparent->collection_wrapper->get_current( ).*
   check lv_btstatus_parent is bound.
    CASE lv_btstatus_parent->get_name( ).
        WHEN 'BTStatusH'.
          gc_relation_name = lc_us_header.
        WHEN 'BTStatusI'.
          gc_relation_name = lc_us_item.
    ENDCASE.
ENDIF.
CALL METHOD super->do_view_init_on_activation.
ENDMETHOD.
Here lv_btstatus_parent is bound during initial launch, however after navigating back to the same page, its blank leading to exception.
any suggestions would be helpful.
regards,
pradeep

solved myself

Generate a Shared Component LIST in XML or JSON format

Greetings...
I am using the LIST functionality within the Shared Component area of our application in order to maintain a menu/navigation list. I'm utilizing all of the features of the LIST Shared Component -- links, authorizations, conditions, comments, etc. This list will appear on every page, so I'm putting it on page zero.
I'd like to get this list in an XML, JSON, or some format so I can manipulate it in javascript to display it. I guess another way to put it is that the template options for a LIST template seem to be very detailed and specific (which is great in general) and I am looking to just get the data out and display it myself.
I can easily enough write a SQL query to produce the hierarchy proper hierarchy of the list, but I would be circumventing the method ApEx uses to implement all of the conditions and authorizations on the entries. I see there are APIs for both generating the list and also checking conditions, but neither of them are accessible to my custom schema and I wasn't sure if I should even attempt to reproduce them.
Basically, I'd like to use the built-in functionality of the LIST Shared Component, but use my own display methods.
Shane.

http://htmldb.oracle.com/pls/otn/f?p=20297:14

Custom vs component controller

i was trying to use component controller instead of custom controller in the Get Flight List application. but it is not working. can any one tell why?
when do we use custom controller and when component controller?

Hai vineet,
For Normal and simple applications you can use Component controller , If you are using complex application that contains more models and more views , you can share the data by using custom controllers,
can you breifly explain what's your problem is?
to get the reponses immediately post this thread on Webdynpro for java forum
regards,
Naga

WebUI: Data sharing / Component Controller

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