var firstTime = false;

function onSourceDownloadProgressChanged(sender, eventArgs) {
    if (firstTime == false) {
        var hortGutter = Math.round(document.body.offsetWidth - 350) / 2;
        var vertGutter = Math.round(document.body.offsetHeight - 420) / 2;
        sender.findName("MainComp")["Canvas.Left"] = hortGutter;
        sender.findName("MainComp")["Canvas.Top"] = vertGutter;
        firstTime = true;
    }
    sender.findName("uxStatus").Text = Math.round((eventArgs.progress * 1000) / 10) + "";
    sender.findName("uxStatusReflection").Text = Math.round((eventArgs.progress * 1000) / 10) + "";
    sender.findName("loaderBar").Width = eventArgs.progress * 300;
}