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: |
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Topics: |
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; }