C / C++ / MFC

"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli

"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli

<code>// Calculate the actual point in the screen
	INT nY1 = LPtoDP(AXIS_Y, dblDataY.GetAt(0));
	INT nX1 = LPtoDP(AXIS_X, dblDataX.GetAt(0));
	pDC->MoveTo(nX1, nY1);
	for (int i=0; i < dblDataX.GetCount();i++)
	{
		// Calculate the actual point in the screen
		INT nY2 = LPtoDP(AXIS_Y, dblDataY.GetAt(i));
		INT nX2 = LPtoDP(AXIS_X, dblDataX.GetAt(i));
		// Draw  graph Line
		pDC->LineTo(nX2, nY2);
	}
</code>

<code>
LPtoDP( AXIS_TYPE AxisType, DOUBLE dblData)
{
	
	switch(AxisType)
	{
		case AXIS_X:
			nPos = (INT)(m_dblOrgX + ( dblData * m_dblScaleFactorX ));
			break;
		case AXIS_Y:
			nPos = (INT)(m_dblOrgY + ( dblData * dblScaleFactorY ));
			break;
		default:
			return 0;
	}
	return nPos;
}
</code>

DPtoLP( AXIS_TYPE AxisType, DOUBLE dblData )
{

switch(AxisType)
{
	case AXIS_X:
		wdPos = (WORD)( (dblData - m_dblOrgX) / m_dblScaleFactorX);
		break;
	case AXIS_Y:
		wdPos = (WORD)((m_dblOrgY - dblData)  / m_dblScaleFactorY);
		break;
	default:
		return 0;
}
return wdPos;
}

CalcScaleFactor( CRect rctDrawArea )
{
	DOUBLE dblScaleRangeX =   m_dblScaleMaxX - m_dblScaleMinX;
	DOUBLE dblScaleRangeY =   m_dblScaleMaxY - m_dblScaleMinY;
	
	m_dblScaleFactorX = ( dblScaleRangeX == 0 ) ?
		0 : (DOUBLE)rctDrawArea.Width() / dblScaleRangeX;
        m_dblScaleFactorY = ( dblScaleRangeY == 0.0 ) ?
		0 : (DOUBLE)rctDrawArea.Height() / dblScaleRangeY;
	
	m_dblOrgX = rctDrawArea.left   -	( m_dblScaleMinX * dblScaleFactorX );
	m_dblOrgY = rctDrawArea.bottom + ( m_dblScaleMinY * dblScaleFactorY );
	}
}