LAnnCurve::GetUserHandles

#include "ltwrappr.h"

virtual L_INT LAnnCurve::GetUserHandles(pAnnHandle, pCount)

pANNHANDLE pAnnHandle;	/* array of ANNHANDLE structures that define user handles */
L_UINT *pCount;	/* pointer to an unsigned integer used to return the total count of user handles */

Gets information about all existing user-defined annotation handles.

Parameter	Description
pAnnHandle	Array of ANNHANDLE structures to be updated with the user-defined handles.
pCount	Pointer to an unsigned integer used to return the total number of user handles

Returns

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

Comments

Call with pAnnHandle == NULL to get the total number of user handles. Then allocate memory for an array of ANNHANDLE structures and call this function again.

Gets an array of user-defined handles associated with the annotation object.

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
	Annotation Functions: Implementing Custom Annotations
	Annotation Functions: Creating Custom Annotations
	Fixed Annotations
	Minimizing Flicker With Double Buffering

Example

// This example displays information about all the user handles in an object

static L_VOID DumpAnnHandle(L_UINT uIndex, pANNHANDLE pAnnHandle) 
{
   L_TCHAR szMsg[400]; 
   
   if (pAnnHandle) 
   {
      wsprintf(szMsg, TEXT("uIndex %d\nuStructSize: %d\nnID: %d\n aptContainer[%f,%f]\nptClient[%d,%d]\nbVisible: %s\ncrPen: 0x%x\ncrFill: 0x%x\nnShape: %s\nhCursor: %s\n"),
               uIndex, 
               pAnnHandle->uStructSize,  
               pAnnHandle->nID, 
               pAnnHandle->aptContainer.x, pAnnHandle->aptContainer.y, 
               pAnnHandle->ptClient.x,     pAnnHandle->ptClient.y, 
               pAnnHandle->bVisible ? TEXT("Visible") : TEXT("Not Visible"),
               pAnnHandle->crPen, 
               pAnnHandle->crFill, 
               pAnnHandle->nShape == ANNHANDLE_SHAPE_SQUARE ? TEXT("Square") : TEXT("Circle"),
               pAnnHandle->hCursor ? TEXT("Cursor") : TEXT("No Cursor")
             ); 
      MessageBox(NULL, szMsg, TEXT(""), MB_OK); 
   }
}
L_INT LAnnCurve_GetUserHandlesExample(LAnnCurve * LCurve) 
{
   L_INT nRet;
   L_UINT i; 
   L_UINT uCount; 
   pANNHANDLE pAnnHandle; 
   // Get the total count of user handles, and allocate memory
   nRet = LCurve->GetUserHandles(NULL, &uCount); 
   if(nRet != SUCCESS)
      return nRet;
   pAnnHandle = (pANNHANDLE)malloc(uCount * sizeof(ANNHANDLE)); 
   nRet = LCurve->GetUserHandles(pAnnHandle, &uCount); 
   if(nRet != SUCCESS)
      return nRet;
   for (i = 0; i<uCount; i++)
      DumpAnnHandle(i, pAnnHandle + i); 
   free(pAnnHandle); 
   return SUCCESS;
}