LVectorBase::CopyLayer
#include "ltwrappr.h"
virtual L_INT LVectorBase::CopyLayer(pVectorLayerDst, pVectorLayerSrc, dwFlags=0);
LVectorLayer * pVectorLayerDst; |
/* pointer to the destination layer object */ |
LVectorLayer * pVectorLayerSrc; |
/* pointer to the source layer object */ |
L_UINT32 dwFlags; |
/* copy flags */ |
Copies the contents of one layer to another.
This function is available in the LEADTOOLS Vector Imaging Pro Toolkit.
Parameter |
Description |
|
pVectorLayerDst |
Pointer to an LVectorLayer object that points to the destination layer. Pass NULL to copy the source vector layer into the active layer. |
|
pVectorLayerSrc |
Pointer to an LVectorLayer object that points to the source layer. This parameter cannot be NULL. |
|
dwFlags |
Flag that indicates whether or not to empty the destination layer before copying. Possible values are: |
|
|
Value |
Meaning |
|
0 |
Do not empty the destination layer before copying. |
|
VECTOR_FLAGS_REPLACE |
Empty the destination layer before copying. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
The destination layer can be in the same vector handle as the source layer, or it can be in a different vector handle.
An LVectorLayer object can be obtained by calling LVectorBase::EnumLayers, LVectorBase::GetLayerByName or LVectorBase::GetLayerByIndex.
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: |
LVectorBase::AddLayer, LVectorLayer::GetLayerDesc, LVectorBase::GetLayerByName, LVectorBase::GetLayerByIndex |
Topics: |
Example
This example will copy the first layer (and objects) from a vector into the active layer of pVector.
L_INT LVectorBase__CopyLayerExample(HWND hWnd, LVectorBase *pVector) { UNREFERENCED_PARAMETER(hWnd); L_INT nRet; LVectorLayer VectorLayer; //Load a source vector LVectorBase VectorSrc; nRet = VectorSrc.Load(TEXT("C:\\Program Files\\LEAD Technologies, Inc\\LEADTOOLS 15.0\\Images\\square3.dxf")); if(nRet != SUCCESS) return nRet; //Get first layer of source nRet = VectorSrc.GetLayerByIndex(0, &VectorLayer); if(nRet != SUCCESS) return nRet; //Copy layer and objects into pVector active layer nRet = pVector->CopyLayer(NULL, &VectorLayer); if(nRet != SUCCESS) return nRet; return SUCCESS; }