LImageViewerCell::PrePaintCallBack

#include "ltwrappr.h"

virtual L_INT LImageViewerCell::PrePaintCallBack(hCellWnd, pCellInfo)

HWND hCellWnd;	/* handle to the cell window */
pDISPCONTAINERCELLINFO pCellInfo;	/* pointer to a cell information structure */

This callback function is called before painting the cell or sub-cell.

Parameter	Description
hCellWnd	A handle to the window that represents the Medical Viewer Cell.
pCellInfo	Pointer to the DISPCONTAINERCELLINFO structure to be updated with the cell information.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

In order to use this callback function, it must first be set by calling the LImageViewerCell::EnablePrePaintCallBack function.

Required DLLs and Libraries

LTIVW

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:	LImageViewerCell::EnableLowMemoryUsageCallBack, LImageViewerCell::LowMemoryUsageCallBack, LImageViewerCell::RegionCallBack, LImageViewerCell::EnableRegionCallBack, LImageViewerCell::EnableMouseCallBack, LImageViewerCell::ActionCallBack, LImageViewerCell::TagCallBack, LImageViewerCell::EnableTagCallBack, LImageViewerCell::EnableAnnotationCallBack, LImageViewerCell::EnableAnnotationCreatedCallBack, LImageViewerCell::EnablePrePaintCallBack, LImageViewerCell::EnablePostPaintCallBack, LImageViewerCell::PostPaintCallBack, Class Members
Topics:	Image Viewer Cells
	Image Viewer Functions: Callbacks
	Image Viewer Functions: Image Viewer Cells

Example

This example hides the odd frames

#if defined LTV17_CONFIG
#ifdef LImageViewerChild 
class LImageViewerChild :public LImageViewerCell
{
   virtual L_INT PrePaintCallBack (pDISPCONTAINERCELLINFO pCellInfo);
} ;
#endif 
L_INT LImageViewerChild::PrePaintCallBack (pDISPCONTAINERCELLINFO pCellInfo)
{
   if ((pCellInfo->nSubCellIndex | 0x1) != pCellInfo->nSubCellIndex)
   {
      FillRect(pCellInfo->hDC, &pCellInfo->rcRect, (HBRUSH)GetStockObject(GRAY_BRUSH));
      return FAILURE;
   }
   return SUCCESS;
}
L_INT LImageViewer_PrePaintExample(LImageViewerCell& ImageViewerCell)
{
   ImageViewerCell.EnablePrePaintCallBack(TRUE);
   return SUCCESS;
}
#else
#ifdef LImageViewerChild 
class LImageViewerChild :public LImageViewerCell
{
   virtual L_INT PrePaintCallBack (pDISPCONTAINERCELLINFO pCellInfo);
} ;
#endif 
L_INT LImageViewerChild::PrePaintCallBack (pDISPCONTAINERCELLINFO pCellInfo)
{
   if ((pCellInfo->nSubCellIndex | 0x1) != pCellInfo->nSubCellIndex)
   {
      FillRect(pCellInfo->hDC, &pCellInfo->rcRect, (HBRUSH)GetStockObject(GRAY_BRUSH));
      return FAILURE;
   }
   return SUCCESS;
}
L_INT LImageViewer_PrePaintExample(LImageViewer& ImageViewer)
{
   ImageViewer.EnablePrePaintCallBack(TRUE);
   return SUCCESS;
}
#endif // LTV17_CONFIG