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POJavaScript and SVG: how do you increase the clickable area for an onClick event?
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  1. POJavaScript and SVG: how do you increase the clickable area for an onClick event?
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    copied!<p>My script draws lines on the screen at a stroke-width of 3. The size of lines are ideal (visually) but they aren't very easy to click. </p> <p>As a rough example: </p> <pre><code>&lt;html&gt; &lt;head&gt; &lt;script&gt; function selectStrand(evt) { current_id = evt.target.getAttributeNS(null, "id"); document.getElementById('main').innerHTML = current_id; } &lt;/script&gt; &lt;/head&gt; &lt;body&gt; Selected line: &lt;span id="main"&gt;&lt;/span&gt; &lt;?xml version="1.0"?&gt; &lt;svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="100%" height="100%" preserveAspectRatio="xMinYMin meet" viewBox="0 0 1000 1000"&gt; &lt;g id="buffer" transform="translate(10,0)"&gt; &lt;line id="blue-blue" x1="50" y1="50" x2="500" y2="50" style="stroke:blue; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/&gt; &lt;line id="blue-orange" x1="50" y1="70" x2="500" y2="70" style="stroke:orange; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/&gt; &lt;line id="blue-green" x1="50" y1="90" x2="500" y2="90" style="stroke:green; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/&gt; &lt;line id="blue-brown" x1="50" y1="110" x2="500" y2="110" style="stroke:brown; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/&gt; &lt;line id="blue-grey" x1="50" y1="130" x2="500" y2="130" style="stroke:grey; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/&gt; &lt;line id="blue-khaki" x1="50" y1="150" x2="500" y2="150" style="stroke:khaki; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/&gt; &lt;line id="blue-red" x1="50" y1="170" x2="500" y2="170" style="stroke:red; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/&gt; &lt;line id="blue-black" x1="50" y1="190" x2="500" y2="190" style="stroke:black; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/&gt; &lt;line id="blue-yellow" x1="50" y1="210" x2="500" y2="210" style="stroke:yellow; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/&gt; &lt;line id="blue-purple" x1="50" y1="230" x2="500" y2="230" style="stroke:purple; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/&gt; &lt;line id="blue-pink" x1="50" y1="250" x2="500" y2="250" style="stroke:pink; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/&gt; &lt;line id="blue-cyan" x1="50" y1="270" x2="500" y2="270" style="stroke:cyan; stroke-width: 4;" stroke-linecap="round" onclick="selectStrand(evt)"/&gt; &lt;/g&gt; &lt;/g&gt; &lt;/svg&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>Is there a simple way to increase the area around each of the lines to make them easier to click?</p>
 

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