LAnnButton::EnumHandleCallBack

#include "ltwrappr.h"

virtual L_INT LAnnButton::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 LAnnButton::EnumerateHandles function.

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

Returns

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

Comments

The LAnnButton::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 LAnnButton::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 LAnnButton::EnumHandleCallBack you must call LBase::EnableCallBack before calling LAnnButton::EnumerateHandles function.

For more information, refer to the documentation for ANNHANDLEINFO.

Required DLLs and Libraries

LTANN

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

See Also

Functions:	Class Members
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
	Fixed Annotations
	Minimizing Flicker With Double Buffering
	Annotation Functions: Working with the Toolbar

Example

For an example, refer to LAnnButton::EnumerateHandles.