OnBlockSelectionChanged Method of the IImageViewerEvents Interface

OnBlockSelectionChanged method of the IImageViewerEvents Interface in ABBYY FineReader Engine Visual Components on Windows — This method is implemented on the client-side.

This method is implemented on the client-side. It is called by ABBYY FineReader Engine after blocks selection has been changed either in Image Viewer, or in Zoom Viewer synchronized with Image Viewer.

It delivers to the client the index of the selected block.

Syntax

C++

HRESULT OnBlockSelectionChanged(
  int          BlockIndex,
  VARIANT_BOOL Selected
);

C#

void OnBlockSelectionChanged(
  int  BlockIndex,
  bool Selected
);

Visual Basic .NET

Sub OnBlockSelectionChanged( _
  BlockIndex As Integer, _
  Selected As Boolean _
)

Parameters

BlockIndex

[in] Contains the index of the selected block. The index is in the ILayout::VisualBlocks collection.

Selected

[in] Specifies whether the block is selected.

Return values

This method has no specific return values. It returns the standard return values of ABBYY FineReader Engine functions.

Remarks

The client implementation of this method must assure that all exceptions thrown inside the method are caught and handled and no exceptions are propagated outside the method. Propagation of an exception outside the method may lead to unpredictable results (such as program termination).

See also

IImageViewerEvents