LAnnVideo::EnumHandleCallBack

#include "ltwrappr.h"

virtual L_INT LAnnVideo::EnumHandleCallBack(hObject, pHandleInfo)

HANNOBJECT hObject;	/* handle to the annotation object */
pANNHANDLEINFO pHandleInfo;	/* pointer to structure containing information about the annotation object handle */

Processes each annotation object from the LAnnVideo::EnumerateHandles function.

Parameter	Description
hObject	Handle of the annotation object being processed.
pHandleInfo	Pointer to structure that contains information about the annotation object handle.

Returns

SUCCESS_CHANGE	[1] Change the object.
SUCCESS_NOCHANGE	[2] Do not change the object.

Comments

The LAnnVideo::EnumerateHandles function calls your callback function for each handle of a single annotation object.

The pHandleInfo structure can be used to obtain detailed information about an annotation object handle. It can also be used to change some (but not all) of the properties of a user handle. All properties of an annotation object handle can be changed EXCEPT the location. The properties of a node that can be changed with this function are:

Visibility

Pen color

Fill color

Shape

Cursor

To change the location of a user-defined node, use LAnnVideo::ChangeUserHandle.

To change the properties of an annotation object handle, set the corresponding field in the pHandleInfo structure, and return SUCCESS_CHANGED. To leave the handle properties unchanged, return SUCCESS_UNCHANGED.

To enable the LAnnVideo::EnumHandleCallBack you must call LBase::EnableCallBack before calling LAnnVideo::EnumerateHandles function.

For more information, refer to the documentation for ANNHANDLEINFO.

Required DLLs and Libraries

LTANN
LTMM

For a listing of the exact DLLs and Libraries needed for LTANN, based on the toolkit version, refer to Files To Be Included With Your Application.

For a listing of the exact DLLs and Libraries needed for LTMM, based on the toolkit version, refer to Files To Be Included With Your Application.

Functions:	Class Members, LAnnVideo::AddUserHandle, LAnnVideo::EnumerateHandles, LAnnVideo::GetUserHandle, LAnnVideo::GetUserHandles, LAnnVideo::ChangeUserHandle, LAnnVideo::DeleteUserHandle, LAnnContainer::Convert, LAnnContainer::HitTest, LAnnContainer::RestrictCursor, LAnnotation::GetRestrictToContainer, LAnnotation::SetRestrictToContainer, LAnnotation::Define2, LAnnotation::Define
Topics:	Annotation Functions: Object Properties
	Implementing Annotations
	Automated User Interface for Annotations
	Annotation Functions: Creating and Deleting Annotations
	Types of Annotations
	Annotation Functions: Implementing Custom Annotations
	Annotation Functions: Creating Custom Annotations