We need to block the whole UI during an ajax request process to prevent rapid firing events.
For example, when you keep clicking on a drill down/up button successively in very rapid manner, you might get a server side error. And doing hierarchy drag & drop operations in a similar manner can cause the whole UI to be unresponsive sometimes.
So we need to block the UI during the request process to prevent user from doing further operations.
We need to block the whole UI during an ajax request process to prevent rapid firing events.
For example, when you keep clicking on a drill down/up button successively in very rapid manner, you might get a server side error. And doing hierarchy drag & drop operations in a similar manner can cause the whole UI to be unresponsive sometimes.
So we need to block the UI during the request process to prevent user from doing further operations.