function onSourceDownloadProgressChanged(sender, eventArgs) {
    var myHost = document.getElementById("NetGisClient");
    var rectBar = myHost.content.findName("colorTransform");
    var ratio = myHost.content.findName("txtRatio");
    var ratioBig = myHost.content.findName("txtRatioBig");

    if (eventArgs.progress) {

        ratio.Text = Math.round(eventArgs.progress * 100).toString();
        ratioBig.Text = ratio.Text;
        rectBar.Y = 116 - (Math.round(eventArgs.progress * 100) * 1.16);

    } 
}