hmxchart.cpp

一个曲线类

						pPoint[ 2 ].y = m_rectData.bottom - (int)nTemp + ds.GetSize()*2;
						dc.Polygon( pPoint, 3 );
						break;
					case HMX_DATASET_MARKER_BOX:
						ds.GetData( f, nSample);
						nTemp =  ( nSample - m_nYMin) * m_rectData.Height()/(m_nYMax-m_nYMin);
						pPoint[ 0 ].x = m_rectData.left + (int)(nBarWidth/2.0) + (int)(nBarWidth*f) - ds.GetSize()*2;
						pPoint[ 0 ].y = m_rectData.bottom - (int)nTemp - ds.GetSize()*2;
						pPoint[ 1 ].x = m_rectData.left + (int)(nBarWidth/2.0) + (int)(nBarWidth*f) + ds.GetSize()*2;
						pPoint[ 1 ].y = m_rectData.bottom - (int)nTemp - ds.GetSize()*2;
						pPoint[ 2 ].x = m_rectData.left + (int)(nBarWidth/2.0) + (int)(nBarWidth*f) + ds.GetSize()*2;
						pPoint[ 2 ].y = m_rectData.bottom - (int)nTemp + ds.GetSize()*2;
						pPoint[ 3 ].x = m_rectData.left + (int)(nBarWidth/2.0) + (int)(nBarWidth*f) - ds.GetSize()*2;
						pPoint[ 3 ].y = m_rectData.bottom - (int)nTemp + ds.GetSize()*2;
						dc.Polygon( pPoint, 4 );
						break;
					case HMX_DATASET_MARKER_SPH:
						ds.GetData( f, nSample);
						nTemp =  ( nSample - m_nYMin) * m_rectData.Height()/(m_nYMax-m_nYMin);
						pPoint[ 0 ].x = m_rectData.left + (int)(nBarWidth/2.0) + (int)(nBarWidth*f) - ds.GetSize()*2;
						pPoint[ 0 ].y = m_rectData.bottom - (int)nTemp - ds.GetSize()*2;
						pPoint[ 1 ].x = m_rectData.left + (int)(nBarWidth/2.0) + (int)(nBarWidth*f) + ds.GetSize()*2;
						pPoint[ 1 ].y = m_rectData.bottom - (int)nTemp + ds.GetSize()*2;
						dc.Ellipse( pPoint[0].x, pPoint[0].y, pPoint[1].x, pPoint[1].y );
						break;
					case HMX_DATASET_MARKER_DIA:
						ds.GetData( f, nSample);
						nTemp =  ( nSample - m_nYMin) * m_rectData.Height()/(m_nYMax-m_nYMin);
						pPoint[ 0 ].x = m_rectData.left + (int)(nBarWidth/2.0) + (int)(nBarWidth*f);
						pPoint[ 0 ].y = m_rectData.bottom - (int)nTemp - ds.GetSize()*2;
						pPoint[ 1 ].x = m_rectData.left + (int)(nBarWidth/2.0) + (int)(nBarWidth*f) + ds.GetSize()*2;
						pPoint[ 1 ].y = m_rectData.bottom - (int)nTemp;
						pPoint[ 2 ].x = m_rectData.left + (int)(nBarWidth/2.0) + (int)(nBarWidth*f);
						pPoint[ 2 ].y = m_rectData.bottom - (int)nTemp + ds.GetSize()*2;
						pPoint[ 3 ].x = m_rectData.left + (int)(nBarWidth/2.0) + (int)(nBarWidth*f) - ds.GetSize()*2;
						pPoint[ 3 ].y = m_rectData.bottom - (int)nTemp;
						dc.Polygon( pPoint, 4 );
						break;
					}
				}
				delete []pPoint;
			}
		}
		
		dc.SelectObject( pPenOld );
		dc.SelectObject( pBrushOld );
	}

	if( ds.GetStyle() == HMX_DATASET_STYLE_VBAR ) {
		// let's rock
		CPen pen( PS_SOLID, 1, ds.GetColor() ), *pPenOld;
		CBrush brush( ds.GetColor() ), *pBrushOld;
		pPenOld = dc.SelectObject( &pen );
		pBrushOld = dc.SelectObject( &brush );

		CRect rectTemp;
		// nTemp will contains a parametrized data 
		for( f=0; f<ds.GetDatasetSize(); f++ ) {
			ds.GetData( f, nSample);
			if( nSample == HMX_DATASET_VALUE_INVALID )
				continue;
			nTemp =  ( nSample - m_nYMin) * m_rectData.Height()/(m_nYMax-m_nYMin);
			if( nSample > 0.0 ) {
				//  bar is positive

				nZeroLine = m_nYMin > 0 ? m_nYMin : 0;
				nTemp1 = ( nZeroLine -m_nYMin) * m_rectData.Height()/(m_nYMax-m_nYMin);

				rectTemp.top    = m_rectData.bottom - (int)(nTemp);
				rectTemp.bottom = m_rectData.bottom - (int)(nTemp1);
				rectTemp.left   = m_rectData.left + (int)(nBarWidth/2.0) - (int)(nBarWidth*(ds.GetSize()/2.0)/10.0) + (int)(nBarWidth*f);
				rectTemp.right  = m_rectData.left + (int)(nBarWidth/2.0) + (int)(nBarWidth*(ds.GetSize()/2.0)/10.0) + (int)(nBarWidth*f);
				// show at least 1 line bar
				rectTemp.right += (rectTemp.right == rectTemp.left ) ? 1 : 0 ;
			} else {
				// bar is negative

				nZeroLine = m_nYMax < 0 ? m_nYMax : 0;
				nTemp1 = ( nZeroLine -m_nYMin) * m_rectData.Height()/(m_nYMax-m_nYMin);
				
				rectTemp.top    = m_rectData.bottom - (int)(nTemp1);
				rectTemp.bottom = m_rectData.bottom - (int)(nTemp);
				rectTemp.left   = m_rectData.left + (int)(nBarWidth/2.0) - (int)(nBarWidth*(ds.GetSize()/2.0)/10.0) + (int)(nBarWidth*f);
				rectTemp.right  = m_rectData.left + (int)(nBarWidth/2.0) + (int)(nBarWidth*(ds.GetSize()/2.0)/10.0) + (int)(nBarWidth*f);
				// show at least 1 line bar
				rectTemp.right += (rectTemp.right == rectTemp.left ) ? 1 : 0 ;
			}
			dc.Rectangle( rectTemp );
		}

		dc.SelectObject( pPenOld );
		dc.SelectObject( pBrushOld );
	}

	if( ds.GetStyle() == HMX_DATASET_STYLE_AREA ) {
		int g;
		// let's rock
		CPen pen( PS_SOLID, 1, ds.GetColor() ), *pPenOld;
		CBrush brush( ds.GetColor() ), *pBrushOld;
		pPenOld = dc.SelectObject( &pen );
		pBrushOld = dc.SelectObject( &brush );

		// let's cale real dataset size (excluding invalid data)
		int nPoints = 0;
		for( g=0; g<ds.GetDatasetSize(); g++ ) {
			ds.GetData( g, nSample );
			if( nSample != HMX_DATASET_VALUE_INVALID )
				nPoints++;
		}
		// add two points, for firs and last point 
		nPoints += 2;

		// create a dynamic array
		POINT* pPoint = new POINT[ nPoints ];

		// the first
		f=0;
		do {
			ds.GetData( f, nSample);
			f++;
		} while( nSample == HMX_DATASET_VALUE_INVALID );

		pPoint[0].x = m_rectData.left + (int)(nBarWidth/2.0) + (int)(nBarWidth*(f-1.0));
		nZeroLine = m_nYMin > 0 ? m_nYMin : 0;
		nZeroLine = m_nYMax < 0 ? m_nYMax : nZeroLine;
		nTemp = ( nZeroLine -m_nYMin) * m_rectData.Height()/(m_nYMax-m_nYMin);
		pPoint[0].y = m_rectData.bottom - (int)nTemp;

		g = 1;
		for( f=0; f<ds.GetDatasetSize(); f++ ) {
			ds.GetData( f, nSample);
			if( nSample == HMX_DATASET_VALUE_INVALID )
				continue;
			// nTemp will contains a parametrized data 
			nTemp =  ( nSample - m_nYMin) * m_rectData.Height()/(m_nYMax-m_nYMin);
			pPoint[g].x = m_rectData.left + (int)(nBarWidth/2.0) + (int)(nBarWidth*f);
			pPoint[g].y = m_rectData.bottom - (int) nTemp;
			g++;
		}

		// the last
//		pPoint[nPoints-1].x = m_rectData.left + (int)(nBarWidth/2.0) + (int)(nBarWidth*(g-2));
		pPoint[nPoints-1].x = pPoint[g-1].x;
		nZeroLine = m_nYMin > 0 ? m_nYMin : 0;
		nZeroLine = m_nYMax < 0 ? m_nYMax : nZeroLine;
		nTemp = ( nZeroLine - m_nYMin) * m_rectData.Height()/(m_nYMax-m_nYMin);
		pPoint[nPoints-1].y = m_rectData.bottom - (int) nTemp;
		dc.Polygon( pPoint, nPoints );

		dc.SelectObject( pPenOld );
		dc.SelectObject( pBrushOld );

		delete []pPoint;
	}

	return true;
}

//
//	CalcDatas
//	calculate all useful variables starting from the control size
//
//	arguments
//
//		none
//
//	return
//
//		true if ok, else false
//
bool CHMXChart::CalcDatas()
{
	double nTemp1, nTemp2;
	int f=0, nTemp3;

	GetClientRect( m_rectArea );

	m_rectUsable.top    = m_rectArea.top    + m_rectArea.Height()/HMX_AREA_MARGINS;
	m_rectUsable.bottom = m_rectArea.bottom - m_rectArea.Height()/HMX_AREA_MARGINS;
	m_rectUsable.left   = m_rectArea.left   + m_rectArea.Width() /HMX_AREA_MARGINS;
	m_rectUsable.right  = m_rectArea.right  - m_rectArea.Width() /HMX_AREA_MARGINS;

	// let's calc everything
	if( !m_strTitle.IsEmpty() ) {
		m_rectTitle.top    = m_rectUsable.top;
		m_rectTitle.left   = m_rectUsable.left;
		m_rectTitle.bottom = m_rectUsable.bottom/HMX_AREA_TITLE;
		m_rectTitle.right  = m_rectUsable.right;
		m_rectGraph.top    = m_rectTitle.bottom;
		m_rectGraph.left   = m_rectUsable.left;
		m_rectGraph.bottom = m_rectUsable.bottom;
		m_rectGraph.right  = m_rectUsable.right;
	} else {
		m_rectGraph = m_rectUsable;
	}

	m_rectYAxis.top    = m_rectGraph.top;
	m_rectYAxis.left   = m_rectGraph.left;
	m_rectYAxis.bottom = m_rectGraph.top  + m_rectGraph.Height()*(100-HMX_AREA_XAXIS)/100;
	m_rectYAxis.right  = m_rectGraph.left + m_rectGraph.Width()*(HMX_AREA_YAXIS)/100;

	m_rectXAxis.top    = m_rectGraph.top  + m_rectGraph.Height()*(100-HMX_AREA_XAXIS)/100;
	m_rectXAxis.left   = m_rectGraph.left + m_rectGraph.Width()*(HMX_AREA_YAXIS)/100;
	m_rectXAxis.bottom = m_rectGraph.bottom;
	m_rectXAxis.right  = m_rectGraph.right;

	m_rectData.top     = m_rectGraph.top;
	m_rectData.bottom  = m_rectXAxis.top;
	m_rectData.left    = m_rectYAxis.right;
	m_rectData.right   = m_rectGraph.right;

	// reset 
	m_nXMax = 0;

	for( f=0; f<HMX_MAX_DATASET; f++ ) {
		nTemp3 = m_dataset[f].GetDatasetSize();
		m_nXMax = max( m_nXMax, nTemp3 );
	}
	
	// Hey man, there's nothing to draw
	if( m_nXMax == 0 )
		return false;

	// search min & max in first non-empty dataset
	f = 0;
	while( !m_dataset[f].GetMinMax( m_nYMin, m_nYMax ) )
		f++;
	
	// let's search 
	for( ; f<HMX_MAX_DATASET; f++ ) {
		if( m_dataset[f].GetMinMax( nTemp1, nTemp2 ) ) {
			m_nYMin = min( m_nYMin ,nTemp1 );
			m_nYMax = max( m_nYMax, nTemp2 );
		}
	}

	// now I modify m_nYMin & m_nXMax to improve readability
	m_nYMin -= (m_nYMax - m_nYMin)*0.0; 
	m_nYMax += (m_nYMax - m_nYMin)*0.0; 

	// whid this 'strange' function I can set m_nYmin & m_nYMax so that 
	// they are multiply of m_nRoundY
	if( m_nRoundY > 0.0 ) {
		m_nYMin = (((int)m_nYMin-(int)m_nRoundY)/(int)m_nRoundY)*m_nRoundY;
		m_nYMax = (((int)m_nYMax+(int)m_nRoundY)/(int)m_nRoundY)*m_nRoundY;
	}


	// now nYMin & nYMax contain absolute min and absolute max
	// and these data can be used to calc the graphic's Y scale factor
	// nXMax contains the maximum number of elements, useful to 
	// calculate the X scale factor

	return true;
}

//
//	Redraw
//	redraw everything
//
//	arguments
//
//		none
//
//	return
//
//		true if ok, else false
//
bool CHMXChart::Redraw()
{
	Invalidate(true);
	GetParent()->SendMessage( WM_PAINT, 0, 0 );

	return true;
}

//
//	SetData
//	Add new data to the dataset
//
//	arguments
//
//		nDatasetIndex = the dataset index
//		nData         = the value
//
//	return
//
//		true if ok, else false
//
bool CHMXChart::SetData(int nDatasetIndex, double nData)
{
	if( nDatasetIndex < 0 || nDatasetIndex >= HMX_MAX_DATASET )
		return false;

	return m_dataset[nDatasetIndex].SetData(nData);

}

//
//	SetData
//	Modify a data into the dataset
//
//	arguments
//
//		nDatasetIndex = dataset index
//		nIndex        = index
//		nData         = value
//
//	return
//
//		true if ok, else false
//
bool CHMXChart::SetData(int nDatasetIndex, int nIndex, double nData)
{
	if( nDatasetIndex < 0 || nDatasetIndex >= HMX_MAX_DATASET )
		return false;

	return m_dataset[nDatasetIndex].SetData(nIndex, nData);

}

//
//	GetData
//	get data from the dataset
//
//	arguments
//
//		nDatasetIndex = dataset index
//		nIndex        = index
//		nData         = value
//
//	return
//
//		true if ok, else false
//
bool CHMXChart::GetData(int nDatasetIndex, int nIndex, double& nData)
{
	if( nDatasetIndex < 0 || nDatasetIndex >= HMX_MAX_DATASET )
		return false;

	return m_dataset[nDatasetIndex].GetData(nIndex,nData);

}

//
//	SetDatasetStyle
//
//	arguments
//
//		nDatasetIndex = dataset index
//		nStyle        = style
//
//	return
//
//		true if ok, else false
//
bool CHMXChart::SetDatasetStyle(int nDatasetIndex, int nStyle)
{
	if( nDatasetIndex < 0 || nDatasetIndex >= HMX_MAX_DATASET )
		return false;

	return m_dataset[nDatasetIndex].SetStyle( nStyle );
}

//
//	GetDatasetStyle
//
//	arguments
//
//		nDatasetIndex = dataset index
//		nStyle        = style
//
//	return
//
//		true if ok, else false
//
bool CHMXChart::GetDatasetStyle(int nDatasetIndex, int& nStyle)
{
	if( nDatasetIndex < 0 || nDatasetIndex >= HMX_MAX_DATASET )
		return false;

	nStyle = m_dataset[nDatasetIndex].GetStyle();

	return true;
}

//
//	SetDatasetMarker
//
//	arguments
//
//		nDatasetIndex = dataset index
//		nMarker       = marker
//
//	return
//
//		true if ok, else false
//
bool CHMXChart::SetDatasetMarker(int nDatasetIndex, int nMarker)
{
	if( nDatasetIndex < 0 || nDatasetIndex >= HMX_MAX_DATASET )
		return false;

	return m_dataset[nDatasetIndex].SetMarker( nMarker );
}

//
//	GetDatasetMarker
//
//	arguments
//
//		nDatasetIndex = dataset index
//		nMarker       = marker
//
//	return
//
//		true if ok, else false
//
bool CHMXChart::GetDatasetMarker(int nDatasetIndex, int& nMarker)
{
	if( nDatasetIndex < 0 || nDatasetIndex >= HMX_MAX_DATASET )
		return false;

	nMarker = m_dataset[nDatasetIndex].GetMarker();

	return true;
}

//
//	SetDatasetPenSize
//
//	arguments
//
//		nDatasetIndex = dataset index
//		nSize         = pen size in pixel or bar size (range 1-10)
//
//	return
//
//		true if ok, else false
//
bool CHMXChart::SetDatasetPenSize(int nDatasetIndex, int nSize)
{
	if( nDatasetIndex < 0 || nDatasetIndex >= HMX_MAX_DATASET )
		return false;

	return m_dataset[nDatasetIndex].SetSize( nSize );
}

//
//	GetDatasetPenSize
//
//	arguments
//
//		nDatasetIndex = dataset index
//		nSize         = size
//
//	return
//
//		true if ok, else false
//
bool CHMXChart::GetDatasetPenSize(int nDatasetIndex, int& nSize)
{
	if( nDatasetIndex < 0 || nDatasetIndex >= HMX_MAX_DATASET )
		return false;

	nSize = m_dataset[nDatasetIndex].GetSize();

	return true;
}

//
//	SetDatasetPenColor
//
//	arguments
//
//		nDatasetIndex = dataset index
//		clr           = color
//
//	return
//
//		true if ok, else false
//
bool CHMXChart::SetDatasetPenColor(int nDatasetIndex, COLORREF clr)
{
	if( nDatasetIndex < 0 || nDatasetIndex >= HMX_MAX_DATASET )
		return false;

	return m_dataset[nDatasetIndex].SetColor( clr );
}

//
//	GetDatasetPenColor
//
//	arguments
//
//		nDatasetIndex = dataset index
//		clr           = color
//
//	return
//
//		true if ok, else false
//
bool CHMXChart::GetDatasetPenColor(int nDatasetIndex, COLORREF& clr)
{
	if( nDatasetIndex < 0 || nDatasetIndex >= HMX_MAX_DATASET )
		return false;

	clr = m_dataset[nDatasetIndex].GetColor();

	return true;
}

//
//	SetBkGnd
//
//	arguments
//
//		clr        = color
//
//	return
//
//		true if ok, else false
//
bool CHMXChart::SetBkGnd(COLORREF clr)
{
	m_clrBkGnd = clr;
	Redraw();

	return true;
}

//
//	SetBkGnd
//
//	arguments
//
//		none
//
//	return
//
//		true if ok, else false
//
bool CHMXChart::SetBkGnd()
{
	CColorDialog dlg( GetBkGnd() );

	if( dlg.DoModal() == IDOK )
		return SetBkGnd( dlg.GetColor() );
	else
		return false;

}

//
//	GetBkGnd
//
//	arguments
//
//		none
//
//	return
//
//		background color
//
COLORREF CHMXChart::GetBkGnd()
{
	return m_clrBkGnd;
}

//
//	SetTitle
//
//	arguments
//
//		sTitle = title
//
//	return
//
//		true if ok, else false
//
bool CHMXChart::SetTitle(CString strTitle)
{
	m_strTitle = strTitle;
	Redraw();

	return true;
}

//
//	GetTitle
//
//	arguments
//
//		none
//