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Re: Creating a html <select> dropdown menu in XSL, whe

Subject: Re: Creating a html <select> dropdown menu in XSL, where the attribute of an XML element is the selected value when page loads
From: "G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>
Date: Tue, 12 Jan 2010 16:26:37 -0500
Re:  Creating a html <select> dropdown menu in XSL
At 2010-01-12 22:09 +0100, Martin Jackson wrote:
For the months, Kens question, "why do you need an algorithmic
approach?" made me realize I didn't. Instead I just made 12 static
<choose> parts, one for each month. Like this:

<xsl:template match="@month">
        <xsl:variable name="month">
                <xsl:value-of select="."/>
        </xsl:variable>

The above is very wasteful ... and it isn't even needed.


                <xsl:choose>
                        <xsl:when test="$month='januari'">
                                <option value="januari" selected="selected">
                                        januari
                                </option>
                        </xsl:when>
                        <xsl:otherwise>
                                <option value="januari">
                                        januari
                                </option>
                        </xsl:otherwise>
                </xsl:choose>

<!-- and so on -->
</xsl:template>

That can be simplified:


  <xsl:template match="@month">
    <option value="januari">
      <xsl:if test="@month='januari'>
        <xsl:attribute name="selected">selected</xsl:attribute>
      </xsl:if>
      <xsl:text>januari</xsl:text>
    </option>
    ...
  </xsl:template>

... and even easier when you use XSLT 2.0.

The solution for the days and years was indeed to use recursive template calls.

The code for this is found below, if anybody happens upon this thread
and is interested in how I solved it.

And also here:


<xsl:template name="incrementValue">
        <xsl:param name="value"/>
        <xsl:param name="invar"/>
        <xsl:param name="stop"/>
        <option value="{$value}">
           <xsl:if test="$value=$invar">
              <xsl:attribute name="selected">selected</xsl:attribute>
            <xsl:value-of select="$value"/>
        </option>
        <xsl:if test="$value &lt; $stop">
          <xsl:call-template name="incrementValue">
                <xsl:with-param name="value" select="$value + 1"/>
                <xsl:with-param name="invar" select="$invar"/>
                <xsl:with-param name="stop" select="$stop"/>
          </xsl:call-template>
        </xsl:if>
</xsl:template>

I hope this helps as it will reduce your maintenance by having less duplicated code.

. . . . . . . . . Ken

--
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