我有这个HTML代码,它正在调用我的javascript代码。代码适用于仪表。在javascript代码中,我试图访问SVG文件,并修改指针(指标)以显示所需的值。代码工作正常。但是,我不希望在HTML中调用“object id”。我想直接通过javascript访问SVG文件,而不是在HTML中使用对象ID。我尝试使用el.setAttribute('data','gauge.svg');但是后来svg_doc无法检索SVG图像并修改针。任何帮助都将受到高度赞赏。
PS:我尽力解释这个问题。但是,如果我某处不清楚,请告诉我。这是Gauge.png图片,它嵌入我粘贴在https://sphotos-b.xx.fbcdn.net/hphotos-snc6/179594_10150982737360698_1827200234_n.jpg下面的svg代码中
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g name="gauge" width="122px" height="127px">
<image xlink:href="gauging.png" width="122" height="127"/>
<circle id="led" cx="39" cy="76" r="5" style="fill: #999; stroke: none">
<animateColor id="ledAnimation" attributeName="fill" attributeType="css" begin="0s" dur="1s"
values="none;#f88;#f00;#f88;none;" repeatCount="0"/>
</circle>
<g id="needle" transform="rotate(0,62,62)">
<circle cx="62" cy="62" r="4" style="fill: #c00; stroke: none"/>
<rect transform="rotate(-130,62,62)" name="arrow" x="58" y="38" width="8" height="24" style="fill: #c00; stroke: none"/>
<polygon transform="rotate(-130,62,62)" points="58,39,66,39,62,30,58,39" style="fill: #c00; stroke: none"/>
</g>
<text id="value" x="51" y="98" focusable="false" editable="no" style="stroke:none; fill:#fff; font-family: monospace; font-size: 12px"></text>
</g>
</svg>
HTML + Javascript代码
<head>
<title>SVG Gauge example</title>
<script>
function update1(){
var scale=100;
var value;
var value1 = 69;
var el=document.getElementById('gauge1');
if (!el) return;
/* Get SVG document from HTML element */
var svg_doc = el.contentDocument;
if (!svg_doc) return;
/* Rotate needle to display given value */
var needle_el = svg_doc.getElementById('needle');
if (!needle_el) return;
/* Calc rotation angle (0->0%, 260->100%) */
value = parseInt(value1);
scale = parseInt(scale);
if (value > scale) value = scale;
var angle = value / scale * 260;
/* On-the-fly SVG transform */
needle_el.setAttribute('transform','rotate('+angle+',62,62)');
}
document.addEventListener('load', update1, true);
</script>
</head>
<div>
<object id="gauge1" type="image/svg+xml" data="gauge.svg" width="127" height="122"/>
</div>
</html>
答案 0 :(得分:2)
正如robertc已经提到的,您可以将javascript代码嵌入到SVG文件中:
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g name="gauge" width="122px" height="127px">
<image xlink:href="gauging.png" width="122" height="127"/>
<circle id="led" cx="39" cy="76" r="5" style="fill: #999; stroke: none">
<animateColor id="ledAnimation" attributeName="fill" attributeType="css" begin="0s" dur="1s"
values="none;#f88;#f00;#f88;none;" repeatCount="0"/>
</circle>
<g id="needle" transform="rotate(0,62,62)">
<circle cx="62" cy="62" r="4" style="fill: #c00; stroke: none"/>
<rect transform="rotate(-130,62,62)" name="arrow" x="58" y="38" width="8" height="24" style="fill: #c00; stroke: none"/>
<polygon transform="rotate(-130,62,62)" points="58,39,66,39,62,30,58,39" style="fill: #c00; stroke: none"/>
</g>
<text id="value" x="51" y="98" focusable="false" editable="no" style="stroke:none; fill:#fff; font-family: monospace; font-size: 12px"></text>
</g>
<script type="text/javascript">
var scale=100;
var value;
var value1 = 69;
/* Rotate needle to display given value */
var needle_el = document.getElementById('needle');
/* Calc rotation angle (0->0%, 260->100%) */
value = parseInt(value1);
scale = parseInt(scale);
if (value > scale) value = scale;
var angle = value / scale * 260;
/* On-the-fly SVG transform */
needle_el.setAttribute('transform','rotate('+angle+',62,62)');
</script>
</svg>
我已将代码放在实际的SVG内容下面,以便在执行脚本时已加载文档。
然后,您可以直接查看SVG文件,例如在Firefox中(我现在已经测试过了。)