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.

Example

L_INT LVectorBase__GetLayerByIndexExample(HWND hWnd, LVectorBase *pVector) 
{ 
   UNREFERENCED_PARAMETER(hWnd); 
   //LVectorBase Vector; 
   //Vector.Load("test.dxf"); 
   L_INT          nRet; 
   LVectorLayer   VectorLayer; 
   L_TCHAR        szMsg[100]; 
   //Get the first layer 
   nRet = pVector->GetLayerByIndex(0, &VectorLayer); 
   if (nRet == SUCCESS) 
   { 
      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 
      ); 
   } 
   else 
   { 
      wsprintf(szMsg, TEXT("Layer Not Found")); 
      return nRet; 
   } 
   MessageBox(NULL, szMsg, TEXT(""), MB_OK); 
   return SUCCESS; 
}

Help Version 19.0.2017.10.27

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Appendix

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