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POReplacing contents of HTML canvas with Springy force-directed graph
 

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  1. POReplacing contents of HTML canvas with Springy force-directed graph
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    <p>I have a nice force-directed graph using the <a href="http://getspringy.com/" rel="nofollow">Springy</a> force-directed graph layout library. I've discovered that when I replace the graph with another via ajax (e.g., after the user has changed some settings), both graphs occupy the same canvas.</p> <p><strong>What I'm looking for:</strong> I need to get rid of the old graph completely, so the new graph is the only one present in the canvas.</p> <p>Here's a simplified usecase jsfiddle: <a href="http://jsfiddle.net/XPAqX/" rel="nofollow">http://jsfiddle.net/XPAqX/</a></p> <pre><code>// make a new graph var graph = new Springy.Graph(); // make some nodes var spruce = graph.newNode({label: 'Norway Spruce'}); var fir = graph.newNode({label: 'Sicilian Fir'}); // connect them with an edge graph.newEdge(spruce, fir); $('#my_canvas').springy({ graph: graph, nodeSelected: function(node) { alert(node.data.label); } }); //now, I let the user update the dataset with ajax and re-render the graph. graph = null; graph = new Springy.Graph(); // make some nodes var kittens = graph.newNode({label: 'Furry Baby Cats'}); var puppies = graph.newNode({label: 'Fluffy Baby Dogs'}); // connect them with an edge graph.newEdge(kittens,puppies); $('#my_canvas').springy({ graph: graph }); </code></pre> <p>Quick note: cross-posted as an issue on the springy github, no answers yet though: <a href="https://github.com/dhotson/springy/issues/47" rel="nofollow">https://github.com/dhotson/springy/issues/47</a></p>
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    1. USyochannah
    1. USyochannah
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    1. COso what do u want ?? should they both use diff canvas ??
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      1. POReplacing contents of HTML canvas with Springy force-directed graph
      1. USDhaval
    2. COAh, guess it wasn't clear enough. I want ONLY ONE graph in the canvas, so the new one exists and the old one doesn't. I'll edit the question to make it clearer.
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      1. USyochannah
    3. COi am not familiar with this script, but can you check if it has a clear/destroy/redraw method? If it has you can destroy the older canvas data and re-create your canvas with your new data from your ajax
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      1. POReplacing contents of HTML canvas with Springy force-directed graph
      1. USandrew
 

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