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Re: Line SVG charts via XSLT
- To: xsl-list at lists dot mulberrytech dot com
- Subject: Re: [xsl] Line SVG charts via XSLT
- From: Wendell Piez <wapiez at mulberrytech dot com>
- Date: Fri, 06 Jul 2001 11:42:07 +0100
- Reply-To: xsl-list at lists dot mulberrytech dot com
Thorsten:
My guess is you're looking for
<xsl:with-param name="y-natrium-after">
<xsl:value-of select="following-sibling::labor[1]/natrium"/>
</xsl:with-param>
which sets $y-natrium-after to being the natrium child of the first
following labor element (given a labor element as context node).
But what are you planning to do with the last one?
BTW (and FWIW): you've got alot of redundancy/verbosity in your code. For
example,
><xsl:for-each select="labor">
><xsl:apply-templates select=".">
><xsl:with-param name="x-offset"><xsl:value-of select="(position() *
>50)"/></xsl:with-param>
><xsl:with-param name="y-natrium-after"><xsl:value-of
>select="natrium[(position() + 1)]"/></xsl:with-param>
></xsl:apply-templates>
></xsl:for-each>
would be no different from
<xsl:apply-templates select="labor">
<xsl:with-param name="x-offset" select="(position() * 50)"/>
<xsl:with-param name="y-natrium-after"
select="natrium[(position() + 1)]"/>
</xsl:apply-templates>
and
><path>
><xsl:attribute name="id">
><xsl:text>line_row1</xsl:text></xsl:attribute>
><xsl:attribute
>name="style"><xsl:text>visibility:visible</xsl:text></xsl:attribute>
><xsl:attribute name="d">
><xsl:text>M </xsl:text><xsl:value-of select="$x-offset"/><xsl:text>
></xsl:text><xsl:value-of select="$y-natrium"/>
><xsl:text> L </xsl:text><xsl:value-of select="$x-offset + 28"/><xsl:text>
></xsl:text><xsl:value-of select="$y-natrium-after"/>
></xsl:attribute>
></path>
could be
<path id="line-row1" style="visibility:visible"
d="M {$x-offset} {$y-natrium}
L {$x-offset + 28} {$y-natrium-after}"/>
which is more legible once you know what the {} (attribute value templates)
are.
Do you care about this stuff? The main thing is to get it working, I guess.
To solve your basic problem it sounds like you want to learn some more
about how XPath works.
Good luck,
Wendell
At 03:09 PM 7/6/01, you wrote:
>Hello, I'm working for a little project to transform XML with XSL(T) in a
>SVG line chart.
>For drawing lines in SVG I have to specify two points. For example, I would
>like to draw a line with the y-coordinates of the three <natrium>-Tags in my
>XML-file - the x-coordinates are maybe 50, 100, 150.
>I tried to do it with a <xsl:for-each> and a position() like shown in my
>(simplified) XSL-file, but it doesn't work. My idea is something like ...
>natrium[position + 1] ... for the following value. Can anybody help me??
>Thanks a lot...
>Thorsten Richter
>
><?xml version="1.0"?>
><laborviewer>
> <labor>
> <natrium>144</natrium>
> <kalium>4.3</kalium>
> <hb>9.1</hb>
> </labor>
> <labor>
> <natrium>150</natrium>
> <kalium>4.9</kalium>
> <hb>8.8</hb>
> </labor>
> <labor>
> <natrium>140</natrium>
> <kalium>5.0</kalium>
> <hb>8.0</hb>
> </labor>
></laborviewer>
>
><?xml version="1.0" encoding="ISO-8859-1"?>
><xsl:stylesheet version="1.0"
>xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
>xmlns:xlink="http://w3.org/1999/xlink">
><xsl:template match="/">
><xsl:apply-templates select="laborviewer"/>
></xsl:template>
><xsl:template match="laborviewer">
><svg height="100%" width="100%">
><xsl:for-each select="labor">
><xsl:apply-templates select=".">
><xsl:with-param name="x-offset"><xsl:value-of select="(position() *
>50)"/></xsl:with-param>
><xsl:with-param name="y-natrium-after"><xsl:value-of
>select="natrium[(position() + 1)]"/></xsl:with-param>
></xsl:apply-templates>
></xsl:for-each>
></svg>
></xsl:template>
><xsl:template match="labor">
><xsl:param name="x-offset" select="' '"/>
><xsl:param name="y-natrium-after" select="' '"/>
><xsl:variable name="y-natrium"><xsl:value-of
>select="natrium"/></xsl:variable>
><g style="fill:red; stroke:red; stroke-width:1">
><path>
><xsl:attribute name="id">
><xsl:text>line_row1</xsl:text></xsl:attribute>
><xsl:attribute
>name="style"><xsl:text>visibility:visible</xsl:text></xsl:attribute>
><xsl:attribute name="d">
><xsl:text>M </xsl:text><xsl:value-of select="$x-offset"/><xsl:text>
></xsl:text><xsl:value-of select="$y-natrium"/>
><xsl:text> L </xsl:text><xsl:value-of select="$x-offset + 28"/><xsl:text>
></xsl:text><xsl:value-of select="$y-natrium-after"/>
></xsl:attribute>
></path>
></g>
></xsl:template>
></xsl:stylesheet>
======================================================================
Wendell Piez mailto:wapiez@mulberrytech.com
Mulberry Technologies, Inc. http://www.mulberrytech.com
17 West Jefferson Street Direct Phone: 301/315-9635
Suite 207 Phone: 301/315-9631
Rockville, MD 20850 Fax: 301/315-8285
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