updating datapath

[ch_bowen]

I was wondering how to add a node to a datapath and more specifically, adding a node with attributes or modifying a node with attributes. Would someone be able to show me how this is done?

Thank you.

[antun]

Here's one way, that uses a datapointer, which is like a cursor that points to a place in a dataset:


<canvas debug="true">
<dataset name="myDS">
<myrootnode />
</dataset>

<button>
<method event="onclick">
var dp = myDS.getPointer().getXPath('myrootnode');
dp.addNode( 'mynewnode', 'Lorem Ipsum', {'foo':'bar'} );
debug.write( dp.serialize() );
</method>
</button>
</canvas>


First we get a pointer by calling the getPointer() method of the dataset. There's other ways to do this -yyou could have declared a pointer using the <datapointer> tag too. See the datapointer docs for more:

http://www.laszlosystems.com/developers/learn/documentation/lzxref/datapointer.php

Then we move that pointer to where we want to add a node (by calling the getXPath() method). Here we get it to the root node.

Finally we add a child node to where the pointer is pointing using the addNode() method.

Does that answer your question?

-Antun