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LAnnVideo::AddUserHandle

#include "ltwrappr.h"

virtual L_INT LAnnVideo::AddUserHandle(pAnnHandle)

pointer to a structure that defines the user handle

Adds a user-defined handle to an annotation object, where pAnnHandle is a pointer to the structure defining an annotation handle.

Parameter	Description
pAnnHandle	Pointer to a structure that defines the user handle.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

Before calling this function, you must create the LAnnVideo object.

Call this function one or more times to add user handles to an existing annotation object.

The user handle location can be defined using container coordinates or client coordinates.

Client coordinates factor in the current zoom factor, and the horizontal and vertical scrolling.

For more information on defining a user handle, see the documentation for the ANNHANDLE structure.

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.

Example

// This example adds user handles to the center of the top and bottom lines of a Video

L_INT LAnnVideo_AddUserHandleExample(LAnnVideo *pLVideo)  
{ 
	L_INT nRet; 
   ANNHANDLE AnnHandle;  
   L_UINT uType;  
   ANNRECT arc;  
    
   uType = pLVideo->GetType(); 
   if (uType == ANNOBJECT_VIDEO)  
   { 
      nRet = pLVideo->GetRect(&arc, NULL);  
		if(nRet != SUCCESS) 
			return nRet; 
 
      memset(&AnnHandle, 0, sizeof(ANNHANDLE));  
      AnnHandle.uStructSize   = sizeof(ANNHANDLE);   
      AnnHandle.nID           = 100;  
      AnnHandle.bVisible      = TRUE;  
      AnnHandle.crPen         = RGB(0,0,0);  
      AnnHandle.crFill        = RGB(255,0,0);  
      AnnHandle.nShape        = ANNHANDLE_SHAPE_CIRCLE;  
      AnnHandle.hCursor       = NULL;  
      AnnHandle.uFlags        =  ANNHANDLE_ID | ANNHANDLE_LOCATION |  
                                 ANNHANDLE_CONTAINER_COORDINATES | ANNHANDLE_VISIBLE |  
                                 ANNHANDLE_PEN_COLOR | ANNHANDLE_FILL_COLOR | ANNHANDLE_SHAPE;  
       
      AnnHandle.aptContainer.x = (arc.left + arc.right)/2;  
      AnnHandle.aptContainer.y = arc.top;  
      nRet = pLVideo->AddUserHandle(&AnnHandle);  
		if(nRet != SUCCESS) 
			return nRet; 
 
      AnnHandle.aptContainer.x = (arc.left + arc.right)/2;  
      AnnHandle.aptContainer.y = arc.bottom;  
      nRet = pLVideo->AddUserHandle(&AnnHandle);  
		if(nRet != SUCCESS) 
			return nRet; 
   } 
   else 
	{ 
      MessageBox(NULL, TEXT("Annotation object must be a Video."), TEXT("Error"), MB_OK);  
		return FAILURE; 
	} 
	return SUCCESS; 
}

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Help Version 20.0.2020.4.5

LEADTOOLS Raster Imaging C++ Class Library Help

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Classes and Member Functions

Summary of Features

Functions:	Class Members, LAnnVideo::EnumerateHandles, LAnnVideo::EnumHandleCallBack, 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