LAnnAudioClip::GetUserHandles

#include "ltwrappr.h"

virtual L_INT LAnnAudioClip::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

 

Annotation Functions: Working with the Toolbar

Example

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

L_VOID DumpAnnHandles(L_UINT      uIndex, 
                     pANNHANDLE  pAnnHandle) 
{ 
   L_TCHAR szMsg[400]; 
 
   if (pAnnHandle) 
   { 
      _stprintf_s(szMsg, TEXT("uIndex %d\nnSize: %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 LAnnAudioClip_GetUserHandlesExample(HANNOBJECT& hObject) 
{ 
   L_INT nRet; 
   L_UINT i; 
   L_UINT uCount; 
   pANNHANDLE  pAnnHandle; 
 
   LAnnAudioClip MyAnnAudioClip(hObject); 
 
   // Get the total count of user handles, and allocate memory 
   nRet = MyAnnAudioClip.GetUserHandles(NULL, &uCount); 
   if(nRet != SUCCESS) 
      return nRet; 
 
   pAnnHandle = (pANNHANDLE)malloc(uCount * sizeof(ANNHANDLE)); 
   if(pAnnHandle == NULL) 
      return ERROR_NO_MEMORY; 
 
   nRet = MyAnnAudioClip.GetUserHandles(pAnnHandle, &uCount); 
   if(nRet != SUCCESS) 
      return nRet; 
 
   for (i = 0; i < uCount; i++) 
      DumpAnnHandles(i, pAnnHandle + i); 
 
   free(pAnnHandle); 
   return SUCCESS; 
} 

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