I am so sorry, my English is very poor.
I would like to achieve such an effect
before the folder.loadxml, layout.progressOn,
and after the folder.loadxml complete, layout.progressOff
You can try to use onXLS (loading start) and onXLE events:
folders.attachEvent(“onXLS”,function(){
dhxLayout.progressOn()
})
folders.attachEvent(“onXLE”,function(){
dhxLayout.progressOff()
})