LAnnTextPointer::GetUserHandle

#include "ltwrappr.h"

virtual L_INT LAnnTextPointer::GetUserHandle(uIndex, pAnnHandle)

L_INT32 uIndex;	index of user handle to get
pANNHANDLE pAnnHandle;	pointer to a structure

Gets information about the specified user-defined annotation handle.

Parameter	Description
uIndex	Index of user handle to get. The index is zero based. Passing a negative value returns ERROR_INV_PARAMETER.
pAnnHandle	Pointer to structure to be updated with 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 TextPointer annotation object.

Call this function to get information about an existing user-defined annotation handle.

If successful, the entire pAnnHandle structure is filled. The pAnnHandle->uFlags field is ignored. For more information, refer to ANNHANDLE.

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

// This example displays information about the first user handle in an annotation 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 LAnnTextPointer_GetUserHandleExample(LAnnTextPointer *LTextPointer) 
{ 
   L_INT nRet; 
   L_UINT uCount; 
   ANNHANDLE AnnHandle; 
   // Get the total count of user handles 
   nRet = LTextPointer->GetUserHandles(NULL, &uCount); 
   if(nRet != SUCCESS) 
      return nRet; 
   if (uCount > 0) 
   { 
      memset(&AnnHandle, 0, sizeof(ANNHANDLE)); 
      AnnHandle.uStructSize = sizeof(&AnnHandle); 
      nRet = LTextPointer->GetUserHandle(0, &AnnHandle); 
      if(nRet != SUCCESS) 
         return nRet; 
      DumpAnnHandle(0, &AnnHandle); 
   } 
   else 
   { 
      MessageBox(NULL, TEXT("No User Handles!"), TEXT("Error"), MB_OK); 
      return FAILURE; 
   } 
   return SUCCESS; 
}

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LEADTOOLS Raster Imaging C++ Class Library Help

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Summary of Features

Functions:	Class Members, LAnnTextPointer::AddUserHandle, LAnnTextPointer::EnumerateHandles, LAnnTextPointer::EnumHandleCallBack, LAnnTextPointer::GetUserHandles, LAnnTextPointer::ChangeUserHandle, LAnnTextPointer::DeleteUserHandle
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
	Fixed Annotations
	Minimizing Flicker With Double Buffering