LAnnFreehand::AddUserHandle

#include "ltwrappr.h"

virtual L_INT LAnnFreehand::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 LAnnFreehand 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

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.

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
	nnotation Functions: Implementing Custom Annotations
	Annotation Functions: Creating Custom Annotations
	Fixed Annotations
	Minimizing Flicker With Double Buffering
	Annotation Functions: Working with the Toolbar

Example

// This example adds user handles to the center of the top and bottom of a Freehand object

L_INT LAnnFreehand_AddUserHandleExample(LAnnFreehand *pLFreehand)
{
   L_INT nRet;
   ANNHANDLE AnnHandle; 
   L_UINT uType; 
   ANNRECT arc; 
   
   uType = pLFreehand->GetType();
   if (uType == ANNOBJECT_FREEHAND) 
   {
      nRet = pLFreehand->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 = pLFreehand->AddUserHandle(&AnnHandle); 
      if(nRet != SUCCESS)
         return nRet;
      AnnHandle.aptContainer.x = (arc.left + arc.right)/2; 
      AnnHandle.aptContainer.y = arc.bottom; 
      nRet = pLFreehand->AddUserHandle(&AnnHandle); 
      if(nRet != SUCCESS)
         return nRet;
   }
   else
   {
      MessageBox(NULL, TEXT("Annotation object must be a Freehand"), TEXT("Error"), MB_OK); 
      return FAILURE;
   }
   return SUCCESS;
}