Here are some of the design patterns you might consider:
(a) computing the column number based on the counting selected nodes in the
source tree (using count() or xsl:number)
(b) computing the number based on the position of the node in the current
node list (the position() function)
(c) "iterating" over the nodes by head-tail recursion, maintaining a counter
as you do so (by passing a parameter on the recursive call)
(d) a two-phase transformation in which you generate the output nodes as a
plain sequence in the first pass and then number them or group them (or
colour them) in a second pass.
Michael Kay
http://www.saxonica.com/
-----Original Message-----
From: Luke Shannon [mailto:lshannon(_at_)futurebrand(_dot_)com]
Sent: 05 April 2005 18:57
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] Something similar to managing behavior with a variable
Hello;
I'm creating a UI that writes rows of data. The background of
the row needs
to changes every second row. I was doing it like this:
<tr align="left" valign="middle" class="grey1ColumnText">
<xsl:choose>
<xsl:when test='number($position) mod 2 != 0'>
<xsl:attribute name="class">grey1ColumnText</xsl:attribute>
</xsl:when>
<xsl:otherwise>
<xsl:attribute name="class">grey2ColumnText</xsl:attribute>
</xsl:otherwise>
</xsl:choose>
</tr>
My problem now is now have a condition that determines when a
row is to be
written. So, in a collection of 5 items maybe only 1 and 4
get written. I
still need a way to figure out how to alternate the
background for the rows
that actually get written. Position no longer does the trick.
I thought I could keep the previous background in a variable
like below:
<tr align="left" valign="middle" class="grey1ColumnText">
<xsl:choose>
<xsl:when test="$resultBK = 'grey1ColumnText'">
<xsl:attribute name="class">grey2ColumnText</xsl:attribute>
<xsl:variable name="resultBK" select="string('grey2ColumnText')"/>
</xsl:when>
<xsl:otherwise>
<xsl:attribute name="class">grey1ColumnText</xsl:attribute>
<xsl:variable name="resultBK" select="string('grey1ColumnText')"/>
</xsl:otherwise>
</xsl:choose>
</tr>
But I have just found out you can't change the contents of a
global variable
(resultBK) after it has been defined. How can I handle this?
Thanks,
Luke
Luke Shannon | Software Developer
FutureBrand Toronto
207 Queen's Quay, Suite 400
Toronto, ON, M5J 1A7
416 642 7935 (office)
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