我有一个XML文档,其中包含我想使用XSL在SVG图中绘制的数据。图表是可见的,但各个条形图并未填充图表的宽度,而在Y轴上几乎是可见的。 (请参见下文)。
如何获取条形的宽度以填充图表的长度?
当前,条形宽度是根据XML文档中的相应值指定的。
这是我的XML代码:
<xml>
<graph2>
<averageLowTemperatures>
<January>3.7</January>
<February>3.4</February>
<March>5.0</March>
<April>6.4</April>
<May>9.4</May>
<June>12.3</June>
<July>14.6</July>
<August>14.7</August>
<September>12.5</September>
<October>9.6</October>
<November>6.2</November>
<December>4.7</December>
</averageLowTemperatures>
</graph2>
这是我的XSL代码:
<xsl:variable name="max">
<xsl:for-each select="xml/graph2/averageLowTemperatures/*">
<xsl:sort select="." data-type="number" order="descending"/><xsl:if test="position()=1">
<xsl:value-of select="."/>
</xsl:if>
</xsl:for-each>
</xsl:variable>
<svg xmlns="http://www.w3.org/2000/svg">
<g id="axis" transform="translate(0 500) scale(1 -1)">
<!--Y Axis line-->
<line id="axis-y" x1="30" y1="20" x2="30" y2="510" style="stroke:rgb(0,0,0);stroke-width:2"/>
<!--X Axis line-->
<line id="axis-x" x1="30" y1="20" x2="700" y2="20" style="fill:none;stroke:rgb(0,0,0);stroke-width:2"/>
</g>
<xsl:for-each select="xml/graph2/averageLowTemperatures">
<g>
<rect x="31" y="5" width="{January div $max}" height="35" id="Jan"/>
<rect x="31" y="45" width="{February div $max}" height="35" id="Feb"/>
<rect x="31" y="85" width="{March div $max}" height="35" id="Mar"/>
<rect x="31" y="125" width="{April div $max}" height="35" id="Apr"/>
<rect x="31" y="165" width="{May div $max}" height="35" id="May"/>
<rect x="31" y="205" width="{June div $max}" height="35" id="Jun"/>
<rect x="31" y="245" width="{July div $max}" height="35" id="Jul"/>
<rect x="31" y="285" width="{August div $max}" height="35" id="Aug"/>
<rect x="31" y="325" width="{September div $max}" height="35" id="Sep"/>
<rect x="31" y="365" width="{October div $max}" height="35" id="Oct"/>
<rect x="31" y="405" width="{November div $max}" height="35" id="Nov"/>
<rect x="31" y="445" width="{December div $max}" height="33" id="Dec"/>
</g>
</xsl:for-each>
</svg>
这个问题是由于SVG图形宽度(700)远大于条形图的值(14.7)导致几乎看不见吗?
预先感谢
答案 0 :(得分:3)
这是我想到的最简单的方法:
XML
<xml>
<graph2>
<averageLowTemperatures>
<January>3.7</January>
<February>3.4</February>
<March>5.0</March>
<April>6.4</April>
<May>9.4</May>
<June>12.3</June>
<July>14.6</July>
<August>14.7</August>
<September>12.5</September>
<October>9.6</October>
<November>6.2</November>
<December>4.7</December>
</averageLowTemperatures>
</graph2>
</xml>
XSLT 1.0
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns="http://www.w3.org/2000/svg">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="/xml">
<xsl:variable name="temperatures" select="graph2/averageLowTemperatures/*" />
<xsl:variable name="max">
<xsl:for-each select="$temperatures">
<xsl:sort select="." data-type="number" order="descending"/>
<xsl:if test="position()=1">
<xsl:value-of select="."/>
</xsl:if>
</xsl:for-each>
</xsl:variable>
<svg>
<g id="bars" transform="translate(0, 500) scale(1 -1)">
<xsl:for-each select="$temperatures">
<rect x="{40 * position()}" width="30" height="{. div $max * 500}"/>
</xsl:for-each>
</g>
</svg>
</xsl:template>
</xsl:stylesheet>
结果
<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg">
<g id="bars" transform="translate(0, 600) scale(1 -1)">
<rect x="40" width="30" height="125.850340136054"/>
<rect x="80" width="30" height="115.646258503401"/>
<rect x="120" width="30" height="170.068027210884"/>
<rect x="160" width="30" height="217.687074829932"/>
<rect x="200" width="30" height="319.727891156463"/>
<rect x="240" width="30" height="418.367346938776"/>
<rect x="280" width="30" height="496.598639455782"/>
<rect x="320" width="30" height="500"/>
<rect x="360" width="30" height="425.170068027211"/>
<rect x="400" width="30" height="326.530612244898"/>
<rect x="440" width="30" height="210.884353741497"/>
<rect x="480" width="30" height="159.863945578231"/>
</g>
</svg>
已渲染
请注意,将$ max值乘以钢筋段的预期高度。否则,计算将仅将当前值的 ratio 返回最大值。