LAnnVideo::EnumHandleCallBack (original) (raw)
Summary
Processes each annotation object from the LAnnVideo::EnumerateHandles function.
Syntax
#include "ltwrappr.h"
virtual L_INT LAnnVideo::EnumHandleCallBack(hObject, pHandleInfo)
Parameters
HANNOBJECT hObject
Handle of the annotation object being processed.
pANNHANDLEINFO pHandleInfo
Pointer to 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 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:
- ID
- 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 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.
Platforms
Win32, x64.
See Also
Functions
- 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
- 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
Example
For an example, refer to LAnnVideo::EnumerateHandles.
LEADTOOLS Raster Imaging C++ Class Library Help