LVectorBase::GetLayerByIndex

#include "ltwrappr.h"

virtual L_INT LVectorBase::GetLayerByIndex(nIndex, pVectorLayer)

const L_INT nIndex;	/* layer index */
LVectorLayer * pVectorLayer;	/* pointer to a vector layer object */

Gets the layer at the specified index in the class object's vector handle.

Parameter	Description
nIndex	Index of the requested layer. This index is zero-based. Possible values are between 0 and LVectorBase::GetLayerCount - 1.
pVectorLayer	Pointer to an LVectorLayer object to be updated, if the layer is found. If the layer is not found, this function will return ERROR_VECTOR_LAYER_NOT_FOUND.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

To determine the number of layers in a vector handle, call LVectorBase::GetLayerCount.

To get a layer, given the name of the layer, use LVectorBase::GetLayerByName.

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::GetLayerCount, LVectorBase::GetLayerByName
Topics:	Working with Vector Layers

Example

// This example will get a layer by index.
L_VOID Example70(HWND hWnd, LVectorBase *pVector)
{
   //LVectorBase Vector;
   //Vector.Load("test.dxf");
   LVectorLayer VectorLayer;
   L_TCHAR szMsg[100];

   //Get the first layer
   L_INT nRet = pVector->GetLayerByIndex(0, &VectorLayer);
   if (nRet == SUCCESS)
   {
      VECTORLAYERDESC LayerDesc;
      VectorLayer.GetLayerDesc(&LayerDesc);
      wsprintf(szMsg, TEXT("Layer Retrieved\nName[%s]\nSize[%d]\nLocked[%d]\nVisible[%d]"),
         LayerDesc.szName,
         LayerDesc.nSize,
         LayerDesc.bLocked,
         LayerDesc.bVisible
         );
   }
   else
   {
      wsprintf(szMsg, TEXT("Layer Not Found"));
   }
   MessageBox(NULL, szMsg, TEXT(""), MB_OK);
}