LVectorBase::GetActiveLayer
#include "ltwrappr.h"
virtual L_INT LVectorBase::GetActiveLayer(pVectorLayer);
LVectorLayer * pVectorLayer; |
/* pointer to vector layer object */ |
Gets the active layer inside the class object's vector.
Parameter |
Description |
pVectorLayer |
Pointer to an LVectorLayer object to be updated with the active layer. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
Some functions will use the active layer when NULL is passed for a pLVectorLayer parameter. This makes it easier to work with the toolkit when layers are not needed.
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
// This example copies all objects from the active layer of the vector source // to the destination vector (active layer) class LMyVectorLayer1: public LVectorLayer { public: LVectorBase *m_pVectorDst; public: LMyVectorLayer1() {}; virtual ~LMyVectorLayer1(){}; virtual L_INT EnumObjectsCallBackGAL(pVECTORHANDLE pVector, pVECTOROBJECT pObject); }; L_INT LMyVectorLayer1::EnumObjectsCallBackGAL(pVECTORHANDLE pVector, pVECTOROBJECT pObject) { LVectorBase VectorBase(pVector); LVectorObject VectorObject(pObject, &VectorBase); m_pVectorDst->CopyObject(&VectorObject); VectorBase.SetHandle(NULL, FALSE); return SUCCESS ; } L_INT LVectorBase__GetActiveLayerExample(HWND hWnd, LVectorBase *pVectorDst) { UNREFERENCED_PARAMETER(hWnd); //Load a source vector L_INT nRet; LVectorBase VectorSrc; nRet = VectorSrc.Load(TEXT("C:\\Program Files\\LEAD Technologies, Inc\\LEADTOOLS 15.0\\Images\\square3.dxf")); if(nRet != SUCCESS) return nRet; //Get the active layer of source LMyVectorLayer1 VectorLayer; nRet = VectorSrc.GetActiveLayer(&VectorLayer); if(nRet != SUCCESS) return nRet; //Set the destination vector where objects from source will be copied VectorLayer.m_pVectorDst = pVectorDst; //Enumerate all objects in Active layer (and copy to destination vector) nRet = VectorLayer.EnumObjects(); if(nRet != SUCCESS) return nRet; return SUCCESS; }