为SVG< image>创建工具提示标签 [英] Create Tooltip for SVG <image> tag

问题描述

我正在尝试创建一个工具提示，当用户将鼠标悬停在图标上时，该提示将显示，tootltip将提供有关事件的信息.标签位于SVG图片中.

I am attempting to create a tooltip that will appear when the user hover overs the icon, the tootltip will give information regarding the event. The tag is within an SVG image.

这是图片的代码:

<image  class="tooltip-trigger" data-tooltip-text="Battles" id="Battles" x="100" y="200" width="30" height="30" xlink:href="battle.png" />


<g id="tooltip" visibility="hidden" >
        <rect x="2" y="2" width="80" height="24" fill="black" opacity="0.4" rx="2" ry="2"/>
        <rect width="80" height="24" fill="white" rx="2" ry="2"/>
        <text x="3" y="6">Tooltip</text>
    </g>


<script type="text/ecmascript"><![CDATA[
    (function() {
        var svg = document.getElementById('tooltip-svg-5');
        var tooltip = svg.getElementById('tooltip');
        var tooltipText = tooltip.getElementsByTagName('text')[0].firstChild;
        var triggers = svg.getElementsByClassName('tooltip-trigger');
        for (var i = 0; i < triggers.length; i++) {
            triggers[i].addEventListener('mousemove', showTooltip);
            triggers[i].addEventListener('mouseout', hideTooltip);
        }
        function showTooltip(evt) {
            var CTM = svg.getScreenCTM();
            var x = (evt.clientX - CTM.e + 6) / CTM.a;
            var y = (evt.clientY - CTM.f + 20) / CTM.d;
            tooltip.setAttributeNS(null, "transform", "translate(" + x + " " + y + ")");
            tooltip.setAttributeNS(null, "visibility", "visible");
            tooltipText.data = evt.target.getAttributeNS(null, "data-tooltip-text");
        }
        function hideTooltip(evt) {
            tooltip.setAttributeNS(null, "visibility", "hidden");
        }
    })()
]]></script>

加载后，工具提示不会出现

When loaded, the tooltip does not appear

推荐答案

您的代码正在运行.您可能遇到的问题是，工具提示大部分出现在svg元素之外.我在svg元素中添加了 overflow:visible; ，现在您可以看到工具提示.

Your code is working. The problem you may have is that the tooltip appears mostly outside the svg element. I've added overflow:visible; to the svg element and now you can see the tooltip.

  (function() {
        var svg = document.getElementById('tooltip-svg-5');
        var tooltip = svg.getElementById('tooltip');
        var tooltipText = tooltip.getElementsByTagName('text')[0].firstChild;
        var triggers = svg.getElementsByClassName('tooltip-trigger');
        for (var i = 0; i < triggers.length; i++) {
            triggers[i].addEventListener('mousemove', showTooltip);
            triggers[i].addEventListener('mouseout', hideTooltip);
        }
        function showTooltip(evt) {
            var CTM = svg.getScreenCTM();
            var x = (evt.clientX - CTM.e + 6) / CTM.a;
            var y = (evt.clientY - CTM.f + 20) / CTM.d;
            tooltip.setAttributeNS(null, "transform", "translate(" + x + " " + y + ")");
            tooltip.setAttributeNS(null, "visibility", "visible");
            tooltipText.data = evt.target.getAttributeNS(null, "data-tooltip-text");
        }
        function hideTooltip(evt) {
            tooltip.setAttributeNS(null, "visibility", "hidden");
        }
    })()

svg{border:1px solid; overflow:visible;display:block;margin:auto}

<svg id="tooltip-svg-5" viewBox="0 -8 130 238" width="200">

  <image class="tooltip-trigger" data-tooltip-text="Battles" id="Battles" x="100" y="200" width="30" height="30" xlink:href="https://s3-us-west-2.amazonaws.com/s.cdpn.io/222579/pin.png" /> 
  <g id="tooltip" visibility="hidden"> 
    <rect x="2" y="2" width="80" height="24" fill="black" opacity="0.4" rx="2" ry="2"/> 
    <rect width="80" height="24" fill="white" rx="2" ry="2"/> 
    <text x="3" y="6">Tooltip</text> 
  </g> 
</svg>

另一种选择是在文本中添加 text-anchor ="end" 并相应地重写rects.

Another option would have been adding text-anchor="end" to the text and rewriting the rects accordingly.

还有另一种药会在工具提示中使用HTML元素.

Yet another potion would have been using an HTML element for the tooltip.

这篇关于为SVG< image>创建工具提示标签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IT屋！