Enterprise Client Community

hi there,

im just playin around with the Outlookbar and would like to build it up
in a dynamic way, so that i just put the bar itself in the layout and create the items and the content via Componentbinding.

maybe theres already experience to that topic out there

I started as follows :

private OUTLOOKBARComponent outlook = new OUTLOOKBARComponent(); // is mentioned as componentbinding in the Layout

public void buildMenu(){

// Setting the Items
for(int i = 0; i < 5; i++){
OUTLOOKBARITEMComponentTag olbic = new OUTLOOKBARITEMComponentTag();
olbic.setText(i);
BaseComponent bc = olbic.createBaseComponent();
outlook.getChildren().add(bc);
}

// Works fine so far

// Heres my Problem Adding the Content :

OUTLOOKBARCONTENTComponentTag olbct = new OUTLOOKBARCONTENTComponentTag();
BaseComponent bcc = olbct.createBaseComponent();
outlook.getChildren().add(bcc);

Executing this code i run into an ClassCastException - it seems as if i cannot place the Content in the ChildList of the Outlookbar...

But where should it be placed??

thnx n bye

Hi,

to make sure: the nullpointer is on server side.
Could you append the stack trace?

Björn

Oh sorry, I see what is wrong. You must not create the "outlook" member on your own. Please code as follows:

Code:

 private OUTLOOKBARComponent outlook;
 
 public void setOutlook(OUTLOOKBARComponent outlook)
 {
   if (this.outlook == outlook) return; // no change
   this.outlook = outlook;
   buildMenu();
 }
 
 public void buildMenu()
 {
   if (this.outlook == null) return; // for very special sitautions...
   ...
   <your code>
   ...
 }

The JSF component tree is the one creating the outlook component. You "only" get it through the setter.

Björn

hi captain,

thnx - it works ;-)

i want to bind the Actionlisteners of the items also dynamically :

// Building Items
for(...){

OUTLOOKBARITEM... bla = new OUTLOOO...;
bla.setActionListener(#{"d.myAdapter.getContent");
}

// All Items call the same Function

public void getContent(ActionEvent ae){
String id = ae.getComponent.getId();

if(id == soundso){
...
}
else if(id=thisnthat){
...
}
}

is that an effective solution? i would like to avoid setting the ActionListeners as String, is there a more dynamic way?

thnx

...no! It works, but I do not like it if the manged beans are hard wired with component ids. We strongly recommend to NOT do this... (!!!!!!)

You need to use dynamic binding concepts of expressions: use array or map binding to bind to an object that you build up on server side.

Example: the binding of an actionListener can be:
#{a.b.als[1].onSelect}

als[1] is an element of a List of "ActionListener objects", each one supporting "onSelect(ActionEvent ae)".
You can do the same with map, remember: every "." can either be a "get" by introspection or a "get" into a map.

Hops this sounds not too weird...

Björn

hi,

nope, sounds good!

thnx n bye