LAnnButton::GetUserHandles

#include "ltwrappr.h"

virtual L_INT LAnnButton::GetUserHandles(pAnnHandle, pCount)

pANNHANDLE pAnnHandle;

array of ANNHANDLEstructures 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 ANNHANDLEstructures 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

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 LAnnButton_GetUserHandlesExample(LAnnButton * LButton)  
{ 
   L_INT nRet; 
 
   L_UINT i;  
 
   L_UINT uCount;  
 
   pANNHANDLE pAnnHandle;  
 
   // Get the total count of user handles, and allocate memory 
 
   nRet = LButton->GetUserHandles(NULL, &uCount);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   pAnnHandle = (pANNHANDLE)malloc(uCount * sizeof(ANNHANDLE));  
 
  nRet =  LButton->GetUserHandles(pAnnHandle, &uCount);  
  if(nRet != SUCCESS) 
     return nRet; 
 
   for (i = 0; i<uCount; i++) 
      DumpAnnHandle(i, pAnnHandle + i);  
 
   free(pAnnHandle);  
 
   return SUCCESS; 
} 

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