A CreateJS Event that is dispatched when progress changes.
The amount that has been loaded. This can be any number relative to the total.
The total amount that will load. This will default to 1, so if the
loaded value is
a percentage (between 0 and 1), it can be omitted.
Returns a clone of the ProgressEvent instance.
The amount that has been loaded (out of a total amount)
The percentage (out of 1) that the load has been completed. This is calculated using
The total "size" of the load.