Scales a region.
#include "Ltwrappr.h"
L_INT LRasterPaint::RegionScale(nHScaleFactor, nVScaleFactor, nAlignment, phDestRgn)
Horizontal scale factor. Valid values are between 1 and 10000. For example:
Value | Meaning |
---|---|
100 | The same dimensions. |
110 | 1.1 times the original dimensions. |
120 | 1.2 times the original dimensions. |
10000 | 100 times the original dimensions. |
99 | 0.99 times the original dimensions. |
98 | 0.98 times the original dimensions. |
1 | 0.01 times the original dimensions. |
Vertical scale factor. Valid values are between 1 and 10000. For example:
Value | Meaning |
---|---|
100 | The same dimensions. |
110 | 1.1 times the original dimensions |
120 | 1.2 times the original dimensions. |
10000 | 100 times the original dimensions. |
99 | 0.99 times the original dimensions. |
98 | 0.98 times the original dimensions. |
1 | 0.01 times the original dimensions. |
A value that determines how the scaled region will be aligned with respect to the original region. For a list of possible values, refer to PAINTALIGNMENT.
Pointer to the region to be translated. After translation, the toolkit will delete the old region and replace it with the new one.
Value | Meaning |
---|---|
SUCCESS | The function was successful. |
< 1 | An error occurred. Refer to Return Codes |
The user is responsible for deleting the resulting region.
L_INT LRasterPaint_RegionScaleExample( CWnd* pWnd )
{
L_INT nRet;
LRasterPaint rstp;
CDC* pDC = pWnd->GetDC() ;
RECT rcRegion ;
HRGN hDestRgn ;
/* Initiate the Paint toolkit */
nRet = rstp.Initialize ( );
if(nRet != SUCCESS)
return nRet;
/* Set the coordinates with respect to the DC dimensions*/
SetRect ( &rcRegion, 250, 110, 350, 210 ) ;
/* Use the current region properties and the current painting
transformations to create an ellipse region */
nRet = rstp.RegionEllipse ( pDC->m_hDC, &rcRegion, &hDestRgn ) ;
if(nRet != SUCCESS)
return nRet;
/* Display the resulted region */
FrameRgn ( pDC->m_hDC, hDestRgn, ( HBRUSH ) GetStockObject ( BLACK_BRUSH ), 1, 1 ) ;
/* Scale the region */
nRet = rstp.RegionScale (300, 300,
( PAINTALIGNMENT ) (PAINT_ALIGNMENT_HCENTER | PAINT_ALIGNMENT_VCENTER),
&hDestRgn ) ;
if(nRet != SUCCESS)
return nRet;
/* Display the scaled region */
FrameRgn ( pDC->m_hDC, hDestRgn, ( HBRUSH ) GetStockObject ( BLACK_BRUSH ), 1, 1 ) ;
/*Delete the region */
DeleteObject ( hDestRgn ) ;
/* Free the paint tools handle */
nRet = rstp.Free ( ) ;
if(nRet != SUCCESS)
return nRet;
pWnd->ReleaseDC( pDC ) ;
return SUCCESS ;
}