| <?xml version="1.0"?> |
| |
| <!-- |
| Copyright 2001 The Apache Software Foundation |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| --> |
| <!-- ====================================================================== --> |
| <!-- Generate a simple pie chart. Requires parser extensions for sin and --> |
| <!-- cos. --> |
| <!-- --> |
| <!-- @author john.r.morrison@ntworld.com --> |
| <!-- @version $Id$ --> |
| <!-- ====================================================================== --> |
| |
| <xsl:stylesheet version="1.0" |
| xmlns:xsl="http://www.w3.org/1999/XSL/Transform" |
| xmlns:math="http://xml.apache.org/xslt/java"> |
| |
| <xsl:variable name="height" select="graph/meta/pie/height"/> |
| <xsl:variable name="width" select="graph/meta/pie/width"/> |
| |
| <xsl:variable name="radius"> |
| <xsl:choose> |
| <xsl:when test="$height < $width"><xsl:value-of select="2 * $height div 5"/></xsl:when> |
| <xsl:otherwise><xsl:value-of select="2 * $width div 5"/></xsl:otherwise> |
| </xsl:choose> |
| </xsl:variable> |
| |
| <xsl:variable name="360degrees" select="sum(/graph/data//y)"/> |
| <xsl:variable name="1degree" select="360 div $360degrees"/> |
| |
| <xsl:template match="graph"> |
| <svg |
| width="{$width}" |
| height="{$height}"> |
| |
| <xsl:comment>radius = <xsl:value-of select="$radius"/></xsl:comment> |
| <xsl:comment>360 degrees = <xsl:value-of select="$360degrees"/></xsl:comment> |
| <xsl:comment>1 degree = <xsl:value-of select="$1degree"/></xsl:comment> |
| |
| <g transform="matrix(1 0 0 1 {$width div 2} {$height div 2})"> |
| <xsl:apply-templates select="data/set"/> |
| </g> |
| </svg> |
| </xsl:template> |
| |
| <xsl:template match="set"> |
| |
| <xsl:variable name="curpos" select="position()"/> |
| <xsl:variable name="angleStart" select="$1degree * sum(//set[position() < $curpos]/values/*/y)"/> |
| <xsl:variable name="angle" select="sum(descendant::y) * $1degree"/> |
| |
| <xsl:comment>angle start = <xsl:value-of select="$angleStart"/></xsl:comment> |
| <xsl:comment>angle = <xsl:value-of select="$angle"/></xsl:comment> |
| <xsl:comment>angle end = <xsl:value-of select="$angle + $angleStart"/></xsl:comment> |
| |
| <xsl:variable name="xystart"> |
| <xsl:call-template name="xy"> |
| <xsl:with-param name="angle" select="$angleStart"/> |
| </xsl:call-template> |
| </xsl:variable> |
| |
| <xsl:variable name="xyend"> |
| <xsl:call-template name="xy"> |
| <xsl:with-param name="angle" select="$angle + $angleStart"/> |
| </xsl:call-template> |
| </xsl:variable> |
| |
| <path |
| d="M0, 0 L {$xystart} A {$radius}, {$radius} 0 0 1 {$xyend} z" |
| style="fill:rgb({colour/red/text()},{colour/green/text()},{colour/blue/text()}); stroke-width:1"/> |
| |
| </xsl:template> |
| |
| <xsl:template name="xy"> |
| <xsl:param name="angle"/> |
| |
| <xsl:variable name="rad" select="math:java.lang.Math.toRadians($angle)"/> |
| |
| <xsl:value-of select="$radius * math:java.lang.Math.cos($rad)"/><xsl:text>, </xsl:text> |
| <xsl:value-of select="$radius * math:java.lang.Math.sin($rad)"/> |
| </xsl:template> |
| |
| </xsl:stylesheet> |