virtual L_DOUBLE LAnnotation::GetScalarX()
Gets the horizontal scaling factor that is applied to the annotation object.
The horizontal scaling factor.
Typically, the scaling factors are applied to a root container so that the annotations will match the displayed image.
Offset values, which are set by the LAnnotation::SetOffsetX and LAnnotation::SetOffsetY functions, are applied after the scalar properties. For more information, refer to Low-Level Coordinate System for Annotations.
Win32, x64.
L_INT LAnnotation_GetScalarXExample(LAnnotation& LeadAnn,LBitmapBase& LeadBitmap)
{
L_INT nRet;
L_INT nXPercent, nYPercent; // X and Y scale percentage
L_DOUBLE dXScalar, dYScalar; // X and Y floating point scalars
L_TCHAR szMessage[80]; // Message buffer
RECT rClientArea ;
// Get the floating point scalars
dXScalar = LeadAnn.GetScalarX();
dYScalar = LeadAnn.GetScalarY();
// Convert the scalars to percentages
nXPercent = (L_INT)(dXScalar * 100);
nYPercent = (L_INT)(dYScalar * 100);
// Display the percentages in a message
wsprintf (szMessage, TEXT("%d percent X and %d percent Y"), nXPercent, nYPercent);
MessageBox (NULL, szMessage, TEXT("Notice"), MB_OK);
//...
//...
GetClientRect(LeadAnn.GetWnd(),&rClientArea);
nRet = LeadAnn.SetScalarX((L_DOUBLE) rClientArea.right / LeadBitmap.GetWidth());
if(nRet != SUCCESS)
return nRet;
nRet = LeadAnn.SetScalarY((L_DOUBLE) rClientArea.bottom / LeadBitmap.GetHeight());
if(nRet != SUCCESS)
return nRet;
//...
return SUCCESS;
}
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