In This Topic ▼

LAnnRTF::EnumHandleCallBack

#include "ltwrappr.h"

virtual L_INT LAnnRTF::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 LAnnRTF::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 LAnnRTF::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 LAnnRTF::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 LAnnRTF::EnumHandleCallBack you must call LBase::EnableCallBack before calling LAnnRTF::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.

Platforms

Win32, x64.

Example

For an example, refer to LAnnRTF::EnumerateHandles.

Download our FREE evaluation

Help Version 20.0.2020.4.5

LEADTOOLS Raster Imaging C++ Class Library Help

Introduction

Version History

Getting Started

LEADTOOLS Raster Imaging Features

Redistributables/Files To Be Included With Your Application

Quick Reference

Tutorials

Classes and Member Functions

Summary of Features

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