LRasterPaint::GetTransformation

#include "Ltwrappr.h"

L_INT LRasterPaint::GetTransformation(pXForm)

/* pointer to a structure */

Gets the toolkit's current transformation information.

Parameter	Description
pXForm	Pointer to a PAINTXFORM structure to be updated with the current painting transformations.

Returns

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

Comments

The transformation information is used for translating from external coordinates, such as mouse position, to the device context (DC) and/or bitmap coordinates.

Required DLLs and Libraries

LTPNT

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:	LRasterPaint::SetTransformation, LRasterPaint::GetDCExtents, LRasterPaint::SetDCExtents, LRasterPaint::SetMetrics, Class Members
Topics:	Setting General DigitalPaint Information

Example

L_INT LRasterPaint_GetTransformationExample( LRasterPaint &rstp, CWnd* pWnd, LBitmap* pBitmap )
{
   L_INT       nRet;
   CDC*        pDC = pWnd->GetDC( ) ;
   RECT        rcView ;
   RECT        rcShapeRect ;
   PAINTXFORM  PntXForm ;
   /* Get the Current painting transformations  */
   nRet = rstp.GetTransformation ( &PntXForm ) ; 
   if(nRet != SUCCESS)
      return nRet;
   rcView.left   = - PntXForm.nXOffset ; 
   rcView.top    = - PntXForm.nYOffset ; 
   rcView.right  = rcView.left + MulDiv ( pBitmap->GetWidth (  ), PntXForm.nZoom, 100 ) ;
   rcView.bottom = rcView.top  + MulDiv ( pBitmap->GetHeight (  ), PntXForm.nZoom, 100 ) ;
   /* paint the bitmap */
   pBitmap->Paint( )->SetDC( pDC->m_hDC );
   pBitmap->SetDstRect( &rcView );
   pBitmap->Paint( )->PaintDC();
   /* Set the rectangle coordinates with respect to the DC dimensions*/
   SetRect ( &rcShapeRect, 10, 10, 150, 150 ) ;
   /* Use the current shape properties to draw a rectangle to DC (hDC) */
   nRet = rstp.DrawShapeRectangle ( pDC->m_hDC, &rcShapeRect ) ;
   if(nRet != SUCCESS)
      return nRet;
   /* Release the device context */
   pWnd->ReleaseDC( pDC ) ;
   return SUCCESS ;
}