I have a SVG document where three circles are drawn:
<?xml version="1.0"?>
<svg width="450" height="80" xmlns="http://www.w3.org/2000/svg">
<script>
document.fillCircle = function(id) {
var circles = document.getElementsByTagName('circle'),
circle = document.getElementById(id);
[].forEach.call(circles, function(circle) {
circle.setAttribute('fill','#ffffff');
});
circle.setAttribute('fill', '#000000');
}
</script>
<g>
<line y1="35" x1="35" y2="35" x2="375" stroke-width="3" stroke="#000000"/>
<circle id="state1" r="30" cy="35" cx="35" stroke-width="3" stroke="#000000" fill="#ffffff" onclick="fillCircle(this.id);"/>
<circle id="state2" r="30" cy="35" cx="205" stroke-width="3" stroke="#000000" fill="#ffffff" onclick="fillCircle(this.id);"/>
<circle id="state3" r="30" cy="35" cx="375" stroke-width="3" stroke="#000000" fill="#ffffff" onclick="fillCircle(this.id);"/>
</g>
</svg>
For testing purposes I have the onclick="" method, but actually this document is an object in my html document:
<object id="test" data="test-vector.svg" width="100px" height="100px"></object>
I have a dataset and these three circles show the "progress" of every item. I regularly update the JSON set by pulling the new list from the server. For every item changed, I want to update the filled circle.
I would like to update the svg based on some javascript. However, I can't make it to get into the DOM of the SVG. I do not really care if the fillCircle() is inside the svg or not and if I have to use <embed>, <object> or something else, but this kind of javascript does not work for me.
<html>
<body>
<object id="test" data="test-vector.svg"></object>
<script>
var svg = document.getElementById('test');
console.log(svg);
svg.fillCircle('state2');
</script>
</body>
</html>
I tried several things I found on SO, like this one and this one, but whatever I test, the exception is always:
Uncaught TypeError: Object #<HTMLObjectElement> has no method 'fillCircle'
var object = document.getElementById("test") will get you the object element but you can't call that till the object has loaded. Once you have that you can use object.contentDocument to do things with the embedded svg document.
<html>
<body>
<object id="test" data="test-vector.svg" onload="f()" ></object>
<script>
function f() {
var svg = document.getElementById('test');
svg.contentDocument.fillCircle('state2');
}
</script>
</body>
</html>
Why don't you embed the SVG directly in your HTML code (using SVG tags)? According to W3, this works in all modern browsers (and IE >= 9). Accessing and changing the circles' properties with JS is then trivial...
<html>
<body>
<svg>...</svg>
</body>
</html>
If you want to keep your HTML/SVG structure though, you can do the following:
var svg = document.getElementById("test");
svg.onload = function(){
svg.contentDocument.fillCircle("state2");
};
The trick is to wait for the SVG object to load (onload event); not till then you can safely use the contentDocument property. Btw, this is also described in this solution on SO (you posted a link to it). ;)
Related
<svg width="100", height=100">
<polyline id="line" onclick="Click()" points="0,0 50,50" stroke-width="1" stroke="black"/>
</svg>
<script>
var line = document.getElementById('line');
line.style.points="0,50 0,0";
</script>
I wish to use javascript to generate images in page. For some reason this code has no effect. However if instead the last line was for example line.style.stroke="green";, it works. Why?
With JavaScript and jQuery I'm trying to replace a group element with a use element linking to another group element.
// Javascript
origgroup = $("#origgroup")[0];
repgroup = $("#referenceGroup1")[0];
origgroupParent = origgroup.parentNode;
use = document.createElementNS("http://www.w3.org/2000/svg", "use");
use.setAttribute("xlink:href", "#origgroup2");
use.setAttribute("id", "newuse");
tmp = origgroupParent.replaceChild(use, origgroup);
// After this snippet is run, "targetsvg" and "control" are identical. Except that targetsvg's use-tag has an unique ID.
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!-- My "atlas". I want to put <use> elements in "targetsvg" below, linking to these groups. -->
Atlas <br>
<svg id="atlas" width="120" height="70" version="1.1">
<g id="referenceGroup1">
<rect x="10" y="10" width="90" height="20" fill="green"/>
<circle cx="20" cy="40" r="15" fill="blue"/>
</g>
<g id="referenceGroup2">
<rect x="40" y="10" width="90" height="20" fill="red"/>
<circle cx="50" cy="40" r="15" fill="orange"/>
</g>
</svg>
<br> Target <br>
<!-- My target -->
<svg id="targetsvg" width="120" height="70" version="1.1"
xmlns:xlink="http://www.w3.org/1999/xlink">
<g id="origgroup">
<rect x="40" y="10" width="90" height="20" fill="red"/>
<circle cx="50" cy="40" r="15" fill="orange"/>
</g>
</svg>
<br>
Control
<br>
<!-- This is identical to the javascript modified version of "targetsvg" -->
<svg id="control" width="120" height="70" version="1.1"
xmlns:xlink="http://www.w3.org/1999/xlink">
<use xlink:href="#referenceGroup1"></use>
</svg>
What I expect to happen is for there to be a blue circle and a green rectangle under "Target". If I inspect the resulting svg of "targetsvg" it's identical to the svg under "Control". This leads me to believe that "targetsvg" is not redrawn for some reason, is this correct? Is there a way to force that?
I've spent the last five hours searching, but I can't find anything similar. The most relevant I've found is
SVG <use> in Chrome doesn't work
But that uses Angular, which I'm not. I think the cause is the same ("the relative hash link in the element would not correctly resolve."). But if this is the case, how do I resolve this without Angular?
Thanks!
[Background: I have a huge svg-file generated from illustrator. In this file there are a number of fairly complex elements (groups of groups et.c.) that I need to have different versions of. These elements will need to appear on multiple places in the final result, so I either need to have multiple copies of them (Showing/hiding depending on the situation) or some kind of 'atlas' where I pick and replace. My gut says the latter will be more maintainable since there are at least four places and seven "versions" (Think "green", "green with symbol x", "red with symbol y" et.c.). If there are other options, I welcome those.]
Minutes after posting, I realized it was a namespace problem. Changing the JavaScript to:
origgroup = $("#origgroup")[0];
repgroup = $("#referenceGroup1")[0];
origgroupParent = origgroup.parentNode;
// Namespaces
var svgns = 'http://www.w3.org/2000/svg',
xlinkns = 'http://www.w3.org/1999/xlink'
use = document.createElementNS(svgns, "use");
// **setAttributeNS** instead of setAttribute as originally.
use.setAttributeNS(xlinkns, "xlink:href", "#referenceGroup1");
use.setAttribute("id", "newuse");
tmp = origgroupParent.replaceChild(use, origgroup);
Solved my problem.
I'm very new to SVG, so please forgive me if this is a basic question.
I would like to draw circles on the screen and respond whenever the user mouses over each circle.
From what I can tell, when listening to mouse events on an svg, we are actually listening to mouse events on the whole canvas and not on the shapes.
If I want to handle events on the shapes, I have to use a library like D3.
Is it possible to listen to mouseOver event that are triggered when the mouse pointer passes over a specific circle?
No library is needed for this. Given the following SVG:
<svg width="500" height="500">
<circle id="circle1" cx="50" cy="50" r="20" fill="red"/>
<circle id="circle2" cx="150" cy="50" r="20" fill="green"/>
</svg>
You could use CSS or Javascript to have these circles change in some way related to the mouse.
For a simple hover in css you can do something like:
#circle1:hover {
fill: blue;
}
Or any JavaScript mouse event like so:
document.getElementById('circle2').addEventListener('click', function(e) {
e.currentTarget.setAttribute('fill', '#ff00cc');
});
Here is a demo for you to check out:
http://codepen.io/ZevanRosser/pen/bdYyLp
If you want this to only be svg and be able to open this in a browser and see the effect (although Zevan's answer can be embedded in svg), use something like:
<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="500" height="500">
<circle id="circle1" cx="50" cy="50" r="20" fill="red" onmouseover="evt.target.setAttribute('fill', 'blue');" onmouseout="evt.target.setAttribute('fill','red');"/>
<circle id="circle2" cx="150" cy="50" r="20" fill="green" onmouseover="evt.target.setAttribute('fill', 'blue');" onmouseout="evt.target.setAttribute('fill','green');"/>
</svg>
the CSS option shared is cleaner, but this pattern may offer more flexibility for future mouse handling, especially if needing a function to figure out how long you want to let a user "pause" over the circle before actually modifying the property.
Try this...
<circle onmousemove={() => console.log('foo') }/>
I am trying to make and interactive svg which would react to some actions with javascript functions.
My SVG looks like this (this is example of one of many svg I am generating, I deleted some irrelevant elements to make the code more readable):
<svg contentScriptType="text/ecmascript" onmouseover="myOpacity('msg0', 0.5)"
onclick="svgClick('Some example text')"
width="760" xmlns:xlink="http://www.w3.org/1999/xlink" zoomAndPan="magnify"
onmouseout="myOpacity('msg0', 1)"
contentStyleType="text/css" height="30" preserveAspectRatio="xMidYMid meet"
xmlns="http://www.w3.org/2000/svg" version="1.0">
<text fill="black" x="10" id="msg0" font-size="10" y="20">Some text</text>
<script xlink:href="script.js" xlink:actuate="onLoad"
xlink:type="simple" xlink:show="other" type="text/ecmascript"
xmlns:xlink="http://www.w3.org/1999/xlink"/>
</svg>
This is my script.js file with onClick and opacity functions:
function svgClick(text) {
alert(text);
}
function myOpacity(element_id, op_value)
{
element = document.getElementById(element_id);
element.setAttribute('opacity', op_value);
}
The problem is that myOpacity function does not work and nothing happens when I hover over my objects (despite the id should correspond to the argument of the function).
However, the onCLick function works perfectly, so the problem is probably with identifying the element by id.
I am quite stuck here, could you take a look in the code and tell me where did I go wrong?
EDIT: this is a followup from this answer: Interactive SVG - how to choose element to react on mouseover action?
That code works there but it somehow does not do anything in the code I posted here. So my question is why? I know I could do this via attributes, but in that case, I do not know how to handle scenario, when I want to set opacity to one element when mouseover action is triggered on another one...
I pasted your code into a jsFiddle (making the JavaScript inline), and it works without problems in Firefox and Chrome:
http://jsfiddle.net/wpZs6/
However, the hover part could be considerably easier with just a CSS hover selector:
<svg width="760" height="30" xmlns="http://www.w3.org/2000/svg" version="1.0">
<style type="text/css">
svg:hover #msg0 {opacity:.5}
</style>
<text fill="black" x="10" id="msg0" font-size="10" y="20">Some text</text>
</svg>
See here: http://jsfiddle.net/L58z6/
try this :
var divtmp = document.getElementById(element_id);
var newStyle = "filter:alpha(opacity=85);-moz-opacity:0.85; opacity: 0.85;";
divtmp.setAttribute("style", newStyle );
How would I modify an SVG file after it has been loaded by the browser, preferably through jquery? A simple example would be pressing a button and the color of the SVG element changes. Any documentation would help as well.
EDIT: This link helped a great deal:
w3.org/Graphics/SVG/IG/resources/svgprimer.html#SVG_in_HTML
You can't "modify" SVG files (except by changing them on the server). SVG files define a collection of SVG objects, each of which can be identified with an ID, if you wish. These objects can be manipulated with JavaScript like you would any DOM element (e.g. setAttribute, etc). Check http://www.w3.org/TR/SVG11/types.html#BasicDOMInterfaces for the DOM interfaces. Notice that SVGElement extends Element, which is the basic DOM element type.
EDIT: simple example:
<html>
<body>
<input type="button" onclick="doSVGThing()" value="change">
<svg xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink">
<rect id="aRect" x="10" y="10" height="100" width="100"
style="stroke:#ff0000; fill: #9999ff"></rect>
</svg>
<script type="text/javascript">
function doSVGThing() {
var r = document.getElementById('aRect');
r.setAttribute('style', 'stroke: #00ff00; fill: #99ff99');
}
</script>
</body>
</html>