References ▼
#include "ltwrappr.h"
virtual L_INT LVectorLayer::EnumObjectscallBack(pVector, pObject)
Processes each vector object enumerated by the LVectorLayer::EnumObjects function.
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.
Required DLLs and Libraries
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;}