References ▼
#include "Ltwrappr.h"
L_INT LRasterPaint::GetTransformation(pXForm)
Gets the toolkit's current transformation information.
Pointer to a PAINTXFORM structure to be updated with the current painting transformations.
| Value | Meaning |
|---|---|
| SUCCESS | The function was successful. |
| < 1 | An error occurred. Refer to Return Codes |
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
L_INT LRasterPaint_GetTransformationExample( LRasterPaint &rstp, CWnd* pWnd, LBitmap* pBitmap ){L_INT nRet;CDC* pDC = pWnd->GetDC( ) ;RECT rcView ;RECT rcShapeRect ;PAINTXFORM PntXForm ;RECT rcDCExtents ;/* 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 ) ;/* Get the destination DC dimensions */pWnd->GetClientRect ( &rcDCExtents ) ;/* Set the toolkit user DC extents */nRet = rstp.SetDCExtents ( &rcDCExtents ) ;if(nRet != SUCCESS)return nRet;/* 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 ;}