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Processes each vector object enumerated by the LVectorLayer::EnumObjects function.
#include "ltwrappr.h"
virtual L_INT LVectorLayer::EnumObjectscallBack(pVector, pObject)
Pointer to the class object's associated vector image that contains the objects to enumerate.
Pointer to the vector object being processed.
| Value | Meaning |
|---|---|
| SUCCESS | The function was successful. |
| < 1 | An error occurred. Refer to Return Codes. |
The LVectorLayer::EnumObjects function calls this function as it gets a pointer to each vector object.
To use this function, derive a class from LVectorLayer and override the EnumObjectsCallBack member function. Note that LVectorLayer::EnumObjectsCallBack does not return an LVectorObject object.
You can attach the pVECTOROBJECT pObject to an LVectorObject class object and call LVectorObject::LockObject and LVectorObject::UnlockObject to get detailed information about each vector object.
This example copies all objects from active layer of vector source to vector destination (active layer).
class LMyVectorLayer: public LVectorLayer{public:LVectorBase *m_pVectorDst;public:LMyVectorLayer() {};virtual ~LMyVectorLayer(){};virtual L_INT EnumObjectsCallBack(pVECTORHANDLE pVector, pVECTOROBJECT pObject);};L_INT LMyVectorLayer::EnumObjectsCallBack(pVECTORHANDLE pVector, pVECTOROBJECT pObject){LVectorBase VectorBase(pVector);LVectorObject VectorObject(pObject, &VectorBase);m_pVectorDst->CopyObject(&VectorObject);VectorBase.SetHandle(NULL, FALSE);return SUCCESS ;}L_INT LVectorLayer__EnumObjectsCallBackExample(HWND hWnd, LVectorBase *pVectorDst){UNREFERENCED_PARAMETER(hWnd);//Load a source vectorL_INT nRet;LVectorBase VectorSrc;nRet = VectorSrc.Load(MAKE_IMAGE_PATH(TEXT("random.dxf")));if(nRet != SUCCESS)return nRet;//Get the active layer of sourceLMyVectorLayer VectorLayer;nRet = VectorSrc.GetActiveLayer(&VectorLayer);if(nRet != SUCCESS)return nRet;//Set the destination vector where objects from source will be copiedVectorLayer.m_pVectorDst = pVectorDst;//Enumerate all objects in Active layer (and copy to dest vector)nRet = VectorLayer.EnumObjects();if(nRet != SUCCESS)return nRet;return SUCCESS;}