function onSourceDownloadProgressChanged(sender, eventArgs) {
    var content = sender.getHost().content;

    var parentCanvas = sender.findName("parentCanvas");
    parentCanvas["Canvas.Left"] = content.ActualWidth / 2 - parentCanvas.Width / 2;
    
    sender.findName("uxStatus").Text = "loading web site: " + Math.floor((eventArgs.progress * 100)) + "%";
    sender.findName("uxProgressBar").ScaleY = eventArgs.progress;
}

function onSourceDownloadCompleted(sender, eventArgs) {
}