StackOverflow2013

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plurals

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13409449
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2012-11-16T02:19:18.030
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2012-11-16T02:19:18.030
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Body
Option 1 : From Shmiddty's post, a programmatic approach to referencing with 2d context: <pre><code>function Shape(can) { this.x = 0; this.y = 0; this.width = 0; this.height = 0; this.fill = "rgba(0,0,0,0)"; this.parent = can; this.draw = function(ctx) { if (!$(me.parent).is(':visible')) return; var parts = me.fill.split(','); parts[3] = $(me.parent).css("opacity") + ')'; me.fill = parts.join(','); ctx.fillStyle = me.fill; ctx.fillRect(me.x, me.y, me.width, me.height); }; var me = this; } (function() { var can = $("#sandbox")[0], ctx = can.getContext('2d'), wid = can.width, hei = can.height, sha = new Shape($('<div id="box"/>').appendTo('body')); sha.x = 0; sha.y = 0; sha.width = 50; sha.height = 50; sha.offsetWidth = 50; sha.offsetHeight = 50; sha.fill = "rgba(000,111,222,1)"; (function draw(){ ctx.clearRect(0,0,wid,hei); sha.draw(ctx); webkitRequestAnimationFrame(draw); })(); $(can).click(function(){ $(sha.parent).fadeToggle(); }); $('#box').click(function(){ $(this).fadeToggle(); }); })(); </code></pre> Option 2 : I was able to track x,y coords from click and touch events by applying CSS to a hidden DOM element. Calling a bootstrap popover : <pre><code>$("#canvas").click(function(e) { var x = e.pageX; var y = e.pageY; if ($.inArray(x, coords['shape1']) !== -1 || $.inArray(y, coords['shape1']) !== -1){ $("#myObj").css({'position':'absolute','top':y,'left':x}).popover({ trigger: 'click', placement:'top', }).popover('show'); } }); stage.update(); </code></pre> HTML: <pre><code><canvas id="canvas" width="375" height="322"></canvas> </code></pre>
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1. POReferencing canvas graphics as DOM elements with jQuery
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1. PTAnswer
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1. USdcd0181
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1. POReferencing canvas graphics as DOM elements with jQuery
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