virtual L_INT LBitmapRgn::SetRgnRoundRect(pRect, nWidthEllipse, nHeightEllipse)
Creates or updates the associated class object's bitmap region by adding a rounded rectangular region.
Pointer to the windows RECT structure that specifies the bounding rectangle of the region. You specify the structure using device context coordinates, and LEADTOOLS translates the coordinates using the values set using LBitmapRgn::SetRgnXForm.
The width of the ellipse that describes the arc of the rounded corners. You specify the measurement in device context pixels, and LEADTOOLS translates the coordinates using the values set using LBitmapRgn::SetRgnXForm.
The height of the ellipse that describes the arc of the rounded corners. You specify the measurement in device context pixels, and LEADTOOLS translates the coordinates using the values set using LBitmapRgn::SetRgnXForm.
Value | Meaning |
---|---|
SUCCESS | The function was successful. |
< 1 | An error occurred. Refer to Return Codes. |
To update an existing region, you specify how the new region is to be combined with the existing one. For descriptions of the possibilities, refer to Creating a Bitmap Region.
The following illustration shows how you describe the rounded corners by specifying the width and height of an ellipse:
Win32, x64.
L_INT LBitmapRgn__SetRgnRoundRectExample(HWND hWnd)
{
L_INT nRet;
POINT pointRgn ;
LBitmapBase MyBitmap(200,300,ORDER_BGR);
RECT Rect={10,10,350,400};
nRet = MyBitmap.Load(MAKE_IMAGE_PATH(TEXT("image1.cmp")));
if(nRet !=SUCCESS)
return nRet;
LBitmapRgn Region(&MyBitmap);
//set the round rect as a region
nRet =Region.SetRgnRoundRect(&Rect,30,40);
if(nRet !=SUCCESS)
return nRet;
// check if this point in region or not
if (Region.IsPtInRgn(150,200) == TRUE)
MessageBox(hWnd, TEXT("Point in region"), TEXT("Region"), MB_OK );
else
MessageBox(hWnd, TEXT("Point is not in region"), TEXT("Region"), MB_OK );
// set x & y in pointRgn structure
pointRgn.x = 100 ;
pointRgn.y = 100 ;
// check if this point in region or not
if (Region.IsPtInRgn(&pointRgn) ==TRUE)
MessageBox(hWnd, TEXT("Point in region"), TEXT("Region"), MB_OK );
else
MessageBox(hWnd, TEXT("Point is not in region"), TEXT("Region"), MB_OK );
return SUCCESS;
}
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