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POHow to reference Flex elements added during runtime?
 

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  1. POHow to reference Flex elements added during runtime?
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    <p>This feels like a newbie question, so brace yourself.</p> <p>I am having difficulty getting a reference to elements added after compile-time using the 'id' property. I have seen a few forum topics suggesting that this isn't possible, and that getting a reference to elements added this way is trickier, but never just exactly what that trick is. This code throws a fun little: <code>Error: uncaught exception: Error calling method on NPObject! [plugin exception: "ReferenceError: Error #1069: Property canvas_tentpoles_0 not found on SGraph and there is no default value."]</code>.</p> <pre><code>public function calledAfterInit(graph_values:Array):void { for(var i:int=0; i&lt;graph_values.length; i++) { var cdc:CartesianDataCanvas = new CartesianDataCanvas(); cdc.id = "canvas_tentpoles_"+i; cdc.includeInRanges = false; cdc.visible = false; Areachart.annotationElements = Areachart.annotationElements.concat(cdc); // [...do stuff...] } // [...later...] for(var j:int=0; j&lt;graph_values.length; j++) { drawOnCanvas(j); } } private function drawOnCanvas(index:int):void { var canvas:CartesianDataCanvas = this["canvas_tentpoles_"+index]; // ← Error likely from here canvas.lineStyle(1); canvas.moveTo(10,10); canvas.lineTo(10,20); // [...etc...] } </code></pre> <p>I'd like to not have to pre-add any more <code>&lt;mx:CartesianDataCanvas&gt;</code> tags than I'll need, and I'll only need as many as <code>graph_values.length</code>. Could someone kindly show me where I'm going wrong?</p>
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