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This is a callback interface that is used by the InjectTextLayer method of the Engine object to report events during processing. This interface is implemented on the client-side. An object receiving notifications through this interface’s methods may do the following inside the methods’ implementation:
  • Process any system messages to help prevent the application from appearing unresponsive during long operations. This can be helpful in applications with a user interface.
  • Report percentage of document analysis, recognition, and export.
  • Report recognizer tips and warnings to the user.
  • Report information about completion of the operation.

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Methods

NameDescription
OnPageProcessedDelivers to the client information about page processing completed.
OnProgressDelivers to the client information about approximate percentage of operation completed.
OnWarningDelivers to the client tips and warnings which occurred during processing.

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Input parameter

The InjectTextLayer method of the Engine object receives a pointer to this interface as an input parameter.

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Remarks

In Linux, this interface does not work if the Engine object is loaded as an out-of-process server.