Can I concatenate xpath values?

[TripleToe]

I'm a little new to the Laszlo syntax so maybe someone can help me out.

My data looks like this

<teachers>
<teacher id="1">
<firstname>John</firstname>
<lastname>Doe</lastname>
</teacher>
<teacher id="2">
<firstname>Jane</firstname>
<lastname>Doe</lastname>
</teacher>
</teachers>

I have a list and I want the list text to display both the first and last names.

I was trying something like this to concatenate the two xpath values:

<textlistitem width="300" datapath="teachersdata:/teachers/teacher/" text='$path{"firstname/text()"} + $path{"lastname/text()"}' value='$path{"@id"}' />

But this doesn't work. Does anyone know how to combine the firstname and lastname nodes to set the text attribute for the list?

Thanks

[antun]

For something like this you can build up the string when the text field sends its ondata event:


<canvas debug="true">

<dataset name="myds">
<teachers>
<teacher id="1">
<firstname>John</firstname>
<lastname>Doe</lastname>
</teacher>
<teacher id="2">
<firstname>Jane</firstname>
<lastname>Doe</lastname>
</teacher>
</teachers>
</dataset>

<text datapath="myds:/teachers[1]/teacher[1]">
<method event="ondata">
var str = this.datapath.xpathQuery( "firstname/text()" )
+ " " + this.datapath.xpathQuery( "lastname/text()" );
this.setText( str );
</method>
</text>

</canvas>


-Antun

[TripleToe]

Thanks for the reply. The only problem here is that I am using a textlistitem component rather than just text. The textlistitem component doesn't have a setText() method. I tried this:

<textlistitem width="300" datapath="teachersdata:/teachers/teacher" value='$path{"@id"}'>
<method event="ondata">
debug.write("ondata");
var fullname = this.datapath.xpathQuery("firstname/text()") + " " + this.datapath.xpathQuery("lastname/text()")
debug.write(fullname);
this.text = fullname;
</method>
</textlistitem>

The debug statement shows the correct result, but I'm not able to actually set the text value of the textlistitem using the script. Any suggestions on this?

Thanks again.

[antun]

this.text = "foo" won't work - the ontext event won't be sent, so the textlistitem won't have cause to update.

If an attribute doesn't have a setter method in LZX, you can always use setAttribute:

this.setAttribute( "text", "some text" );

... which does send the ontext event.

-Antun

[TripleToe]

Excellent! That is just what I was looking for. Thanks so much!