because your layed out width is greater than your measuredWidth. Same for height. Let's say the label is 100 wide and you have a two pixel border. measuredWidth will be 104. If you're given a width other than 104 in updateDisplayList, you'll move the label a bit and now measuredWidth will report a different number. Also, it is recommended that you use getExplicitOrMeasuredWidth() in measure() because the label hasn't been layed out yet so it doesn't have a valid width.
________________________________ From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Giles Roadnight Sent: Tuesday, May 20, 2008 1:08 AM To: flexcoders@yahoogroups.com Subject: [flexcoders] Measure and UpdateDisplayList called continuously Hi All I'm writing an item renderer based on a Canvas. I have the following methods (the canvas just has a label as a child) override protected function measure():void { super.measure(); var metrics:EdgeMetrics = viewMetricsAndPadding; measuredWidth = _label.width + metrics.left + metrics.right; measuredHeight = _label.height + metrics.top + metrics.bottom; } override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void { super.updateDisplayList(unscaledWidth, unscaledHeight); var metrics:EdgeMetrics = viewMetricsAndPadding; _label.x = (unscaledWidth-(_label.width+metrics.left+metrics.right))/2; _label.y = (unscaledHeight-(_label.height+metrics.top+metrics.bottom))/2; } What's wrong with these methods? why do they get continually called? At the moment this hangs the application. If I add a bit of padding it works fine. _label.x and _label.y are both set to 0 in the above case. -- Giles Roadnight http://giles.roadnight.name <http://giles.roadnight.name>
