onAction for TreeItemType

[Former Member]

Hi

If I click on a TreeItem, my Event Handler method get's the path information for the selected context element like

"IOCG.TreeUIView.Customer.1.Order.0.OrderItem.2"

How do I transfer this String into an context element?

(of type IWDTreeItemType Element)?

Thanks

Raphael

[Former Member · Accepted solution]

Hi Raphael,

Try the following:

1. Declare parameter (say, selectedItem) in action handler as subtype of IWDNodeElement. You can use concrete interface generated for your context node in view controller, smth. like <package>.IPrivate<ViewName>.I<NodeName>Element, i.e. IOCG.IPrivateTreeUIView.IOrderItemElement.

2. in wdDoModifyView add the following code snipet for mapping:

  if (firstTime)
  {
    final IWDAbstractTreeNodeType tiOrderItem 
      = (IWDAbstractTreeNodeType)view.getElement
        (
          "MyTreeItemID"
        );

    tiOrderItem.mappingOfOnAction()
      .addSourceMapping("path", "selectedItem");
  }

WBR,

VS

[Former Member · Accepted solution]

Thanks, this worked fine !

[former_member187167 · Accepted solution]

Hi ,

I have a similar ptroblem - I have a master column in a table, that expands like a tree. Is it possible to use <b>mappingOnOfLoadChildren</b> to find the path for the selected node?

What type should it be the corresponding argument in onLoadChildrenAction(...) method?

I'm novice in Webdynpro, please excuse me if the question is not so smart.

Regards

KM

[former_member187167 · Accepted solution]

Hi,

I think, I found it out - it works in the same manner

In <b>doModifyView()</b> I used <b>IWDAbstractTreeTableColumn</b> instead of <b>IWDTreeNodeType</b> to get reference to UI element.

<b>IWDAbstractTreeTableColumn masterColumn =(IWDAbstractTreeTableColumn) view.getElement("MasterColumnID") ;</b>

After that I just mapped <b>"path"</b> argument to Action argument <b>"selectedElement"</b> by

<b>masterColumn.mappingOfOnAction().addSourceMapping( "path", "selectedElement")</b>

And in onActionLoadChildren I added argument <b>selectedElement</b> of type - Context Element that builds tree.

Best regards

KM

[Former Member · Accepted solution]

One remark concerning the event parameter names used in parameter mapping:

In NW04, you can find the event parameter names in the Javadoc for the event in the UI element API and must use a string literal like "path" in the parameter mapping.

In NW05, there will be a constant definition in the UI element API for each event parameter.

Regards, Armin

[Former Member · Accepted solution]

Hi Armin,

this will indeed be a very useful API enhancement.

Regards,

Stefan