actionscript 3 contentHeight not updating properly -

i using adobe flash builder actionscript make desktop application. getting html code webpage , putting mx:html element, attempting content height in order determine if should hide vertical scrollbar or not. however, when using contentheight seems return height of previous state of element, rather 1 set.

this code fetch html page

var htmlpagerequest:urlrequest = new urlrequest(url);  htmlpagerequest.method = urlrequestmethod.get; //set request's html request method  htmlpageloader.addeventlistener(event.complete, onhtmlloaded); //listen page load htmlpageloader.load(htmlpagerequest);//when loaded continue logic in new function    

this function run when page request complete

private function onhtmlloaded(e:event):void { //logic after html page has loaded              htmlelement.data = htmlpageloader.data; //set content              //determine if vscroll bar should visible             if(htmlelement.contentheight > htmlelement.height) {                 scrollbar.visible = true;              }             else {                 scrollbar.visible = false;             }              trace(htmlelement.height);             trace(htmlelement.contentheight);         } 

i have realised solution problem:

htmlelement.data = htmlpageloader.data; 

rendering html takes amount of time - contentheight being accessed before page has rendered, causing previous value returned. in order fix this, added event listener (htmlrender) in order not access contentheight until rendering complete.

private function onhtmlloaded(e:event):void { //logic after html page has loaded           htmlelement.addeventlistener(event.html_render, onhtmlrendered); //once html has rendered, move on         htmlelement.data = htmlpageloader.data; //render content                         }          private function onhtmlrendered(e:event):void { //logic after page has rendered              //if content of html element bigger box, show scrollbar             if(htmlelement.contentheight > htmlelement.height) {                 scrollbar.visible = true;              }             else {                 scrollbar.visible = false;             }         }