BusinessGraphics and onAction mapping

[Former Member]

I am trying to get a handle on Business Graphics and actions. I can succesfully generate a beautiful chart. But now what I want to do is when the user clicks on a section of the chart, I want to display the underlying data in a table. My problem is I can't seem to be able to determine which slice of the pie (or it's corresponding Context Element) was clicked on.

First I created an Action and mapped it to the BusinessGraphics element.

if (wdContext.currentDataElement() != null) {
    wdComponentAPI.getMessageManager().reportSuccess(wdContext.currentDataElement().getLabel());
}
else {
    wdComponentAPI.getMessageManager().reportWarning("No element selected.");
}

But it always returned No Element Selected, which means clicking on the graphic did NOT select the corresponding Context Element.

So I tried the following in my wdDoModify (like I would do with a recursive tree structure):

IWDBusinessGraphics bg = (IWDBusinessGraphics) view.getElement("BG");
bg.mappingOfOnAction().addParameter("nodeElement", "nodeElement");

And I then added a parameter nodeElement of type IDataElement to my action. Didn't work. I got an OutOfBoundsException.

Any ideas?

[Former Member · Accepted solution]

From the Jacadoc I see that there exists a parameter "id" of the onAction event. Try to map it to some action parameter, either using the parameter mapping editor or by code like this

 if (firstTime)
 {
   IWDBusinessGraphics myBusinessGraphics = (IWDBusinessGraphics) view.getElement("ID-of-BusinessGraphics");
   myBusinessGraphics.mappingOfOnAction().addSourceMapping
   (
     IWDBusinessGraphics.IWDOnAction.ID, // event parameter name
     "name-of-action-parameter" // (type String)
   ); 
 }

Unfortunately, the Javadoc doen't tell what this parameter means (cool, isn't it?)

Armin

[Former Member · Accepted solution]

Yup, that was it. It returned the attribute value defined as the Category, which allowed me to curse through the node to find the related element. Excellent.

Many thanks.