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Id
2497426
data
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0
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0
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CreationDate
2010-03-23T03:38:27.147
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0
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2010-03-23T03:38:27.147
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LastEditorUserId
0
OwnerUserId
5114
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1635419
PostTypeId
2
Score
4
ViewCount
0
LastEditorDisplayName
text
Body
<p>I think I've found the trick to this. IE doesn't know what a "canvas" is, so when you create a canvas element with your javascript, it doesn't work.</p> <p>Other examples I've seen do this to create their canvas:</p> <pre><code>var el = document.createElement('canvas');//this doesn't work in IE </code></pre> <p>So the trick is to just fool IE by creating something legal and calling the canvas initialization on it instead.</p> <p>I used jquery to do an ajax GET for this block of html which I then inserted into the DOM:</p> <pre><code><div id="canvasholder"> <canvas id="mycanvas" width="1024" height="768" style="width:1024px;height:768px"></canvas> </div> </code></pre> <p>In the javascript after the ajax call has completed and the HTML is inserted, I do my canvas initialization. This is just the interesting snippet from my init function.</p> <pre><code>... canvas = $('#mycanvas').get(0);//get dom element from jquery if(!canvas.getContext)//function doesn't exist yet { //we're in IE if we reach this block //otherwise getContext already exists $('#canvasholder').empty(); //add #mycanvas as a div instead of a canvas //you could use document.createElement('div') instead of jquery $('#canvasholder').append( '<div id="mycanvas" width="1024" height="768"></div>'); canvas = $('#mycanvas').get(0); if(typeof G_vmlCanvasManager != 'undefined' ) { canvas = G_vmlCanvasManager.initElement(canvas); } } //now you're set up to draw! context = canvas.getContext("2d"); ... </code></pre> <p>This is now working for me in both Firefox and IE7.</p>
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1. POExcanvas for dynamically created canvas elements
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1. USMnebuerquo
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