There are some examples here:
http://www.openlaszlo.org/lps3/docs/guide/data-tutorial.html#data-tutorial.http
And this one way to do it:
<canvas width="100%" height="600" proxied="false">
<dataset name="myData">
<entries>
<element>20</element>
<element>12</element>
<element>2009</element>
</entries>
</dataset>
<text datapath="myData:/entries">
<handler name="ondata">
var pointer = new lz.datapointer();
Debug.write(pointer);
pointer.setXPath(this.datapath);
var day = pointer.xpathQuery("element[1]/text()");
var month = pointer.xpathQuery("element[2]/text()");
var year = pointer.xpathQuery("element[3]/text()");
this.setAttribute('text', day + '.' + month + '.' + year);
</handler>
</text>
</canvas>
Cheers,
Raju
On Aug 19, 2009, at 5:51 PM, Torsten Curdt wrote:
I have a dataset
<dataset name="result">
<value id="day">13</value>
<value id="month">01</value>
<value id="year">2009</value>
</dataset>
and a <text/> field. Binding the textfield to a single value (e.g.
just day) I worked out.
But what I need the text field to be a composite of all the 3 values.
My idea was to bind the text field to the dataset and in a handler
update the text. Something along the lines of
<text datapath="result:/">
<handler name="ondata">
Debug.write('data has changed');
var day = ...
var month = ...
var year = ...
this.setAttribute('text', day + '.' + month + '.' + year);
</handler>
</text>
But there are two problems:
a) this is only getting called once. (wrong datapath? do I need to
bind against all 3 nodes?)
b) how can I query a value from a dataset in javascript??
var day = this.xpathQuery("result:/val...@id='day']");
var month = result.xpathQuery("/val...@id='month']");
Neither of the two approaches worked.
Any pointers?
cheers
--
Torsten
