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POjQuery, SVG: How to animate an attribute value (not style property)?
 

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  1. POjQuery, SVG: How to animate an attribute value (not style property)?
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    <p>I need to animate an attribute of an SVG element, which has no CSS counterpart - <code>&lt;circle cx="..." /&gt;</code> How can I achieve that?</p> <p>Or, I can use an alternative, e.g. if I could animate <code>&lt;g/&gt;</code> using CSS's <code>top</code> or similar.</p> <p>Any experience?</p> <p>Thanks, Ondra</p> <p>Note this is not a duplicate of <a href="https://stackoverflow.com/questions/911357/how-can-i-animate-an-attribute-value-not-style-property-with-jquery">How can I animate an attribute value (not style property) with jQuery?</a> since that's about HTML.</p> <p>See also <a href="https://stackoverflow.com/questions/2294801/jquery-under-svg">jQuery under SVG</a></p> <h2><strong><em>Update</em></strong></h2> <p>In the end, I did a manual animation as in <a href="https://stackoverflow.com/questions/1108480/svg-draggable-using-jquery-and-jquery-svg">SVG draggable using JQuery and Jquery-svg</a> .</p> <p><strong>jQuery solution still welcome.</strong></p> <p>Anyway, that brought me to other problem - units mismatch. <code>evt.clientX</code> is in pixels, but <code>circle.cx.baseVal.value</code> is in some relative units. So when I do</p> <pre><code> onmousedown=" this.moving=true; this.pt0 = {x: evt.clientX, y: evt.clientY}; this.origPos = {x: this.cx.baseVal.value, y: this.cy.baseVal.value}; " onmouseup="this.moving=false;" onmouseout="this.moving=false;" onmouseover="this.moving=false;" onmousemove="if( this.moving ){ this.cx.baseVal.value = this.origPos.x + (evt.clientX - this.pt0.x); } </code></pre> <p>And have <code>&lt;embed&gt;</code> 3x larger than the SVG's "own" size, then the circle moves 3x faster than the pointer. </p> <h2><strong><em>Update</em></strong></h2> <p>I even tried </p> <pre><code>this.origPos = { x: this.cx.baseVal.convertToSpecifiedUnits(SVGLength.SVG_LENGTHTYPE_PX), y: this.cy.baseVal.convertToSpecifiedUnits(SVGLength.SVG_LENGTHTYPE_PX) }; ... this.cx.baseVal.newValueSpecifiedUnits( SVGLength.SVG_LENGTHTYPE_PX, this.origPos.x + (evt.clientX - this.pt0.x) ); </code></pre> <p>But <code>convertToSpecifiedUnits()</code> returns <code>undefined</code>, which seems to be a lack in implementation of <a href="http://www.w3.org/TR/SVG/types.html#InterfaceSVGLength" rel="nofollow noreferrer">http://www.w3.org/TR/SVG/types.html#InterfaceSVGLength</a> .</p>
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