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LVectorBase::GetLayerCount

Summary

Returns the number of layers inside the class object's associated vector handle.

Syntax

#include "ltwrappr.h"

virtual L_INT LVectorBase::GetLayerCount(L_VOID)

Returns

L_INT Number of layers.

Comments

After calling this function, LVectorBase::GetLayerByIndex can be used to iterate through the layers in a vector handle.

Required DLLs and Libraries

LTVKRN
For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Example

This example gets the total number of layers and displays each layer.

L_INT LVectorBase__GetLayerCountExample(HWND hWnd, LVectorBase *pVector) 
{ 
   UNREFERENCED_PARAMETER(hWnd); 
 
   L_INT          nRet; 
   LVectorLayer   VectorLayer; 
   L_TCHAR        szMsg[100]; 
   L_INT32        nCount, i; 
 
   nCount = pVector->GetLayerCount(); 
   for (i=0; i<nCount; i++) 
   { 
      nRet = pVector->GetLayerByIndex(i,&VectorLayer); 
      if(nRet != SUCCESS) 
         return nRet; 
 
      VECTORLAYERDESC LayerDesc; 
 
      nRet = VectorLayer.GetLayerDesc(&LayerDesc); 
      if(nRet != SUCCESS) 
         return nRet; 
 
      wsprintf(szMsg, TEXT("Layer Retrieved\nName[%s]\nSize[%d]\nLocked[%d]\nVisible[%d]"), 
               LayerDesc.szName, 
               LayerDesc.nSize, 
               LayerDesc.bLocked, 
               LayerDesc.bVisible 
               ); 
      MessageBox(NULL, szMsg, TEXT(""), MB_OK); 
   } 
 
   return SUCCESS; 
}