LVectorBase::GetLayerCount

#include "ltwrappr.h"

virtual L_INT LVectorBase::GetLayerCount(L_VOID)

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

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

LVKRN

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

See Also

Functions:

LVectorBase::GetLayerByName, LVectorBase::GetLayerByIndex

Topics:

Working with Vector Layers

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; 
}

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