本文介绍了SVG 文件中的 Javascript的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个特殊要求，因为我想直接在 SVG 文件中生成一个 SVG ;)到目前为止，我已经使用生成 SVG 标签制作了以下代码，但屏幕上没有任何显示.我可能做错了什么，但我不知道哪里出错了，因为它没有抛出任何错误.
I have a special request as I want to generate a SVG directly inside the SVG file ;)So far I've made the following code with generate SVG tags but nothing appears on screen. I might have made something wrong but I don't know where as it doesn't throw any error.
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200" preserveAspectRatio="xMidYMid meet" id="content">
<defs>
<style type="text/css"><![CDATA[
@font-face {font-family: 'Futura-Heavy'; src: url(../public/css/FuturaStd/FuturaStd-Heavy.otf) format('opentype');}
@font-face {font-family: 'Futura-Light'; src: url(../public/css/FuturaStd/FuturaStd-Light.otf) format('opentype');}
@font-face {font-family: 'Bryant-Regular'; src: url(../public/css/Bryant/Bryant_Pro/BryantPro-Regular.otf) format('opentype');}
.title{
font-family: 'Futura-Heavy', 'Helvetica Neue', sans-serif, Helvetica;
font-size: 14pt;
stroke: none;
fill: white;
letter-spacing: 2px;
text-anchor: middle;
}
.subtitle{
font-family: 'Bryant-Regular', 'Helvetica Neue', sans-serif, Helvetica;
font-size: 14pt;
stroke: none;
fill: grey;
letter-spacing: 2px;
}
]]></style>
</defs>
<script type="text/javascript"><![CDATA[
var data = {
"measures" : {
"avg" : 0.68,
"value" : 0.2
},
"config" : {
"width" : 150,
"height" : 180,
},
"titles" : {
"right_eye" : "RIGHT EYE",
"left_eye" : "LEFT EYE",
"as_of" : "AS {0}% OF PEOPLE"
}
};
var width = data.config.width || 1500; // Longueur totale
var height = data.config.height || 1000; // Hauteur totale
var widthVis = 330; // Longueur de la visualisation
var heightVis = 300; // hauteur de la visualisation
var heightBar = 25; // Hauteur du cadre
var color = data.measures.color || ["#FFC400", "#18B4DC"]; // couple de couleurs
var widthBar = widthVis * 0.8; // Longueur du cadre
data.config.host = data.config.host || '../public'; // Path to resources
var format_string = function() {
var mString = arguments[0];
for (var i=1; i<arguments.length; i++) {
var regEx = new RegExp("\\{" + (i - 1) + "\\}", "gm");
mString = mString.replace(regEx, arguments[i]);
}
return mString;
};
var svg = document.getElementById('content');
svg.setAttribute('height', height +'px');
svg.setAttribute('width', width +'px');
svg.setAttribute('viewBox', '0 0 ' + widthVis + ' ' + heightVis);
var viz = document.createElement('g');
viz.setAttribute('id', 'viz');
viz.setAttribute('transform', 'translate(' + widthVis * 0.1 + ')');
svg.appendChild(viz);
// Create gradient
var defs = document.getElementsByTagName('defs')[0];
var categoryGradient = document.createElement('linearGradient');
categoryGradient.setAttribute('id', 'categoryRelativeGradient');
categoryGradient.setAttribute('x1', '0%');
categoryGradient.setAttribute('x2', '100%');
categoryGradient.setAttribute('y1', '0%');
categoryGradient.setAttribute('y2', '0%');
defs.appendChild(categoryGradient);
var stop1 = document.createElement('stop');
stop1.setAttribute('offset', '0%');
stop1.setAttribute('stop-color', color[0]);
stop1.setAttribute('stop-opacity', 1);
categoryGradient.appendChild(stop1);
var stop2 = document.createElement('stop');
stop2.setAttribute('offset', (data.measures.avg*100) + '%');
stop2.setAttribute('stop-color', color[0]);
stop2.setAttribute('stop-opacity', 1);
categoryGradient.appendChild(stop2);
var stop3 = document.createElement('stop');
stop3.setAttribute('offset', (data.measures.avg*100) + '%');
stop3.setAttribute('stop-color', color[1]);
stop3.setAttribute('stop-opacity', 1);
categoryGradient.appendChild(stop3);
var stop4 = document.createElement('stop');
stop4.setAttribute('offset', '100%');
stop4.setAttribute('stop-color', color[1]);
stop4.setAttribute('stop-opacity', 1);
categoryGradient.appendChild(stop4);
// Create legend
var forme = document.createElement('g');
forme.setAttribute('id', 'path');
forme.setAttribute('transform', 'translate(0, ' + heightVis * 0.6 + ')');
viz.appendChild(forme);
var circle1 = document.createElement('circle'); // Round corners
circle1.setAttribute('cx', 0);
circle1.setAttribute('cy', 0);
circle1.setAttribute('r', heightBar / 2);
circle1.setAttribute('fill', color[0]);
forme.appendChild(circle1);
var circle2 = document.createElement('circle'); // Round corners
circle2.setAttribute('cx', widthBar);
circle2.setAttribute('cy', 0);
circle2.setAttribute('r', heightBar / 2);
circle2.setAttribute('fill', color[1]);
forme.appendChild(circle2);
var rect1 = document.createElement('rect'); // Frame
rect1.setAttribute('x', 0);
rect1.setAttribute('y', - heightBar / 2);
rect1.setAttribute('height', heightBar);
rect1.setAttribute('width', widthBar);
rect1.setAttribute('fill', 'url(#categoryRelativeGradient)');
forme.appendChild(rect1);
var circle3 = document.createElement('circle'); // Extreme points
circle3.setAttribute('cx', 0);
circle3.setAttribute('cy', 0);
circle3.setAttribute('r', heightBar / 4);
circle3.setAttribute('fill', 'black');
forme.appendChild(circle3);
var circle4 = document.createElement('circle'); // Extreme points
circle4.setAttribute('cx', widthBar);
circle4.setAttribute('cy', 0);
circle4.setAttribute('r', heightBar / 4);
circle4.setAttribute('fill', 'black');
forme.appendChild(circle4);
var dotted_line; // Dotted line
for(var index = widthBar / 20; index < widthBar; index += widthBar / 20) {
dotted_line = document.createElement('circle');
dotted_line.setAttribute('cx', index);
dotted_line.setAttribute('cy', 0);
dotted_line.setAttribute('r', heightBar / 12);
dotted_line.setAttribute('fill', 'black');
forme.appendChild(dotted_line);
}
// Textual information
var legend = document.createElement('g');
legend.setAttribute('id', 'legend');
legend.setAttribute('transform', 'translate('+(data.measures.value < 0.5 ? 0 : widthBar)+', ' + heightVis * 0.15 + ')');
viz.appendChild(legend);
var rect_width = data.measures.value < 0.5 ? data.titles.left_eye.length * 15 : data.titles.right_eye.length * 15;
var legend_title = document.createElement('g');
legend_title.setAttribute('transform', 'translate('+(data.measures.value < 0.5 ? 0 : -rect_width)+', 0)');
legend.appendChild(legend_title);
var rect2 = document.createElement('rect'); // Back rectangle
rect2.setAttribute('x', 0);
rect2.setAttribute('y', 0);
rect2.setAttribute('height', 40);
rect2.setAttribute('width', rect_width);
rect2.setAttribute('fill', 'black');
legend_title.appendChild(rect2);
var text1 = document.createElement('text'); // Legend text
text1.setAttribute('class', 'title');
text1.setAttribute('x', rect_width - 30);
text1.setAttribute('y', 27);
text1.setAttribute('height', 40);
text1.setAttribute('width', rect_width);
text1.setAttribute('fill', 'white');
text1.setAttribute('stroke', 'none');
text1.setAttribute('text-anchor', (data.measures.value < 0.5 ? 'begin' : 'end'));
text1.appendChild( document.createTextNode(data.measures.value < 0.5 ? data.titles.left_eye : data.titles.right_eye) );
legend_title.appendChild(text1);
// Legend sub-text
var as_of_text = data.titles.as_of.toString();
var as_of_text_part1 = as_of_text.substr(0, as_of_text.indexOf("%") + 1);
var as_of_text_part2 = as_of_text.substr(as_of_text.indexOf("%") + 1, as_of_text.length);
as_of_text_part1 = format_string(as_of_text_part1, (data.measures.value < 0.5 ? data.measures.avg*100 : ((1 - data.measures.avg)*100).toFixed()));
var subtext1 = document.createElement('text');
subtext1.setAttribute('class', 'subtitle');
subtext1.setAttribute('x', (data.measures.value < 0.5 ? 5 : - 5));
subtext1.setAttribute('y', 65);
subtext1.setAttribute('fill', 'black');
subtext1.setAttribute('text-anchor', (data.measures.value < 0.5 ? 'begin' : 'end'));
subtext1.appendChild( document.createTextNode(as_of_text_part1) );
legend.appendChild(subtext1);
var subtext2 = document.createElement('text');
subtext2.setAttribute('class', 'subtitle');
subtext2.setAttribute('x', (data.measures.value < 0.5 ? 5 : - 5));
subtext2.setAttribute('y', 85);
subtext2.setAttribute('fill', 'black');
subtext2.setAttribute('text-anchor', (data.measures.value < 0.5 ? 'begin' : 'end'));
subtext2.appendChild( document.createTextNode(as_of_text_part2) );
legend.appendChild(subtext2);
// Vertical line
var line = document.createElement('line');
line.setAttribute('class', 'gaugeMark');
line.setAttribute('x1', 0);
line.setAttribute('x2', 0);
line.setAttribute('y1', 0);
line.setAttribute('y2', heightVis * 0.45);
line.setAttribute('fill', 'black');
line.setAttribute('stroke', 'black');
legend.appendChild(line);
]]></script>
</svg>
在 Chrome 开发者控制台中，我得到了一个带有这段代码的白屏，我得到了一些看起来是有效 SVG 的东西.
I got a white screen with this code while in the Chrome developer console I got something that looks to be a valid SVG.
你能帮我解决这个问题吗?我几乎可以肯定我离解决方案不远了.
Could you help me to solve that issue ? I'm almost certain I'm not that far from the solution.
谢谢
推荐答案
SVG 元素必须在 SVG 命名空间中创建，因此您需要使用 createElementNS 而不是 createElement 来创建它们，例如
SVG elements must be created in the SVG namespace so you need to use createElementNS rather than createElement to create them e.g.
var viz = document.createElementNS('http://www.w3.org/2000/svg', 'g');
这篇关于SVG 文件中的 Javascript的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！