A call back class to show the progress of long-running operations.
When a long-running operation is carried out on the instance view or the entry view, this class is used to signal its progress, and when the function is complete.
This calls the observing class when the current operation is finished.
|TInt aError||The error if the operation failed, or KErrNone if successful.|
Asks the observing class whether progress callbacks are required. This is called once only to check if callbacks are enabled.
This calls the observing class with the percentage complete of the current operation.
|TInt aPercentageCompleted||The percentage complete.|
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