rich:tree with unselectable nodes

[th.paulsen]

Hi,

I nedd a tree with unselectable, but toggable nodes. I'd searched for a attribute like "selectable" for trrenode but that doesn't exist.

Then I tried an "onbeforeselectionchange" JS listener, but I havn't found a n attribute in the event which shows me the source (trreode) of the event.

Ater that the same with on selectionchange, in that event there are the attributes "oldcollection" and "newcollection" but they are always empty or null.

Btw: I use Richfaces 4.3.1 final atm.

Any ideas how to implement such a behavior?

Is there any rich Javascript api documentation?

Kind regards

  Thomas

[bleathem]

Why do you not want the nodes to be selectable?  Is it simply for aesthetic reasons?  If so, have you considered simply using CSS to disable any styling changes when the node is selected?

Alternatively, a recent forum post (https://community.jboss.org/thread/228490) explores interacting with a tree's selection state, perhaps that post will give you some insight.

[th.paulsen]

Sorry for my late anwer, but the weekend...

Not not only for aesthetic reasons, the user has no right to select (and work) with that node. But he may work with one of the children.

Playing with the css styles will not prevent events to be fired.

Same with handling these restrictions on the server. It is possible, but I want to use the onselectionchange event to close the surrounding popup only when a valid node is selcted.

[bleathem]

No JS API for RF 4 - this is a top-level goal for RF 5.  You can however look for clues in the javascript source:

https://github.com/richfaces/richfaces/blob/master/framework/src/main/resources/META-INF/resources/org.richfaces/iteration/tree/tree.js

As for your problem, you can solve it with javascript.  Add a beforeselectionchange listener that looks for a marker class on the tree node, and return false if that marker class is/is-not present, and you don't want your node to be selectable.

[th.paulsen]

As I wrote in my question:

Then I tried an "onbeforeselectionchange" JS listener, but I havn't found a n attribute in the event which shows me the source (trreode) of the event.

[bleathem]

Sorry, it's late

Does "event.data.newSelection" not contain what you are looking for?  If it doesn't it's a bug, please file a jira issue.

[th.paulsen]

"rf": {

  "data": {

   "oldSelection": [],

   "newSelection": [

    ""

   ]

  }

}

similar to the onselectionchange event: empty or null.

[bleathem]

Are you familar with using the javascript debugger in your browser?  If so, can you set a breakpoint here:

https://github.com/richfaces/richfaces/blob/master/framework/src/main/resources/META-INF/resources/org.richfaces/iteration/tree/tree.js#L446

and see if you can figure out why the event.data is not as expected?

[th.paulsen]

As far as I can see atm:

The values of the selections are ok in the tree.js, but they will not survive the deepest inner of jQuery.

It will take a bit longer to follow all the packing and upacking of the data

[th.paulsen]

I'm wrong, newSelections isn't empty, my stringify-function shows visited nodes of the hierarchy as "" to avoid infinite loops; 

Now I'm in the structure:

event.rf.data.newSelection[0].id.rf.component.id.rf.....;

[bleathem]

So do you have this working now?

[th.paulsen]

Yes.

function isSelectable(event)

{

    try

    {

        var nid = event.rf.data.newSelection[0].id.id;

        return $("div[id='"+nid+"']").find(".nodedisabled").length == 0;

    }

    catch (e)

    {

//        alert(e);

        return false;

    }

}