2D Graph ActiveX Control

// NTGraphCtl.cpp : Implementation of the CNTGraphCtrl ActiveX Control class.


#include "stdafx.h"
#include "NTGraph.h"
#include "NTGraphCtl.h"
#include "NTGraphPpg.h"

#include <math.h>

#define STATIC

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif


IMPLEMENT_DYNCREATE(CNTGraphCtrl, COleControl)


/////////////////////////////////////////////////////////////////////////////
// Message map

BEGIN_MESSAGE_MAP(CNTGraphCtrl, COleControl)
	//{{AFX_MSG_MAP(CNTGraphCtrl)
	ON_WM_LBUTTONDOWN()
	//}}AFX_MSG_MAP
#ifdef STATIC
	ON_MESSAGE(OCM_COMMAND, OnOcmCommand)
#endif
	ON_OLEVERB(AFX_IDS_VERB_PROPERTIES, OnProperties)
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// Dispatch map

BEGIN_DISPATCH_MAP(CNTGraphCtrl, COleControl)
	//{{AFX_DISPATCH_MAP(CNTGraphCtrl)
	DISP_PROPERTY_NOTIFY(CNTGraphCtrl, "ShowGrid", m_showGrid, OnShowGridChanged, VT_BOOL)
	DISP_PROPERTY_NOTIFY(CNTGraphCtrl, "XLabel", m_strLabelX, OnXLabelChanged, VT_BSTR)
	DISP_PROPERTY_NOTIFY(CNTGraphCtrl, "YLabel", m_strLabelY, OnYLabelChanged, VT_BSTR)
	DISP_PROPERTY_NOTIFY(CNTGraphCtrl, "GridColor", m_gridColor, OnGridColorChanged, VT_COLOR)
	DISP_PROPERTY_NOTIFY(CNTGraphCtrl, "LabelColor", m_labelColor, OnLabelColorChanged, VT_COLOR)
	DISP_PROPERTY_NOTIFY(CNTGraphCtrl, "AxisColor", m_axisColor, OnAxisColorChanged, VT_COLOR)
	DISP_PROPERTY_NOTIFY(CNTGraphCtrl, "NGridX", m_nGridX, OnNGridXChanged, VT_I2)
	DISP_PROPERTY_NOTIFY(CNTGraphCtrl, "NGridY", m_nGridY, OnNGridYChanged, VT_I2)
	DISP_PROPERTY_NOTIFY(CNTGraphCtrl, "MinX", m_minX, OnMinXChanged, VT_R8)
	DISP_PROPERTY_NOTIFY(CNTGraphCtrl, "MaxX", m_maxX, OnMaxXChanged, VT_R8)
	DISP_PROPERTY_NOTIFY(CNTGraphCtrl, "MinY", m_minY, OnMinYChanged, VT_R8)
	DISP_PROPERTY_NOTIFY(CNTGraphCtrl, "MaxY", m_maxY, OnMaxYChanged, VT_R8)
	DISP_PROPERTY_NOTIFY(CNTGraphCtrl, "GraphTitle", m_strGraphTitle, OnGraphTitleChanged, VT_BSTR)
	DISP_PROPERTY_NOTIFY(CNTGraphCtrl, "CursorColor", m_cursorColor, OnCursorColorChanged, VT_COLOR)
	DISP_PROPERTY_NOTIFY(CNTGraphCtrl, "ElementColor", m_elementColor, OnElementColorChanged, VT_COLOR)
	DISP_PROPERTY_NOTIFY(CNTGraphCtrl, "ZoomMode", m_zoomMode, OnZoomModeChanged, VT_BOOL)
	DISP_PROPERTY_NOTIFY(CNTGraphCtrl, "CursorMode", m_cursorMode, OnCursorModeChanged, VT_BOOL)
	DISP_PROPERTY_EX(CNTGraphCtrl, "Element", GetElement, SetElement, VT_I2)
	DISP_PROPERTY_EX(CNTGraphCtrl, "ElementCount", GetElementCount, SetElementCount, VT_I2)
	DISP_PROPERTY_EX(CNTGraphCtrl, "TickFont", GetTickFont, SetTickFont, VT_DISPATCH)
	DISP_PROPERTY_EX(CNTGraphCtrl, "TitleFont", GetTitleFont, SetTitleFont, VT_DISPATCH)
	DISP_PROPERTY_EX(CNTGraphCtrl, "LabelFont", GetLabelFont, SetLabelFont, VT_DISPATCH)
	DISP_FUNCTION(CNTGraphCtrl, "ClearGraph", ClearGraph, VT_EMPTY, VTS_NONE)
	DISP_FUNCTION(CNTGraphCtrl, "CreateElement", CreateElement, VT_BOOL, VTS_I4)
	DISP_FUNCTION(CNTGraphCtrl, "SetRange", SetRange, VT_BOOL, VTS_R8 VTS_R8 VTS_R8 VTS_R8)
	DISP_FUNCTION(CNTGraphCtrl, "SetXYValue", SetXYValue, VT_BOOL, VTS_R8 VTS_R8 VTS_I4 VTS_I2)
	DISP_FUNCTION(CNTGraphCtrl, "SetShowElement", SetShowElement, VT_EMPTY, VTS_BOOL)
	DISP_FUNCTION(CNTGraphCtrl, "Copy2Clipboard", Copy2Clipboard, VT_EMPTY, VTS_NONE)
	DISP_STOCKPROP_APPEARANCE()
	DISP_STOCKPROP_BACKCOLOR()
	DISP_STOCKPROP_BORDERSTYLE()
	DISP_STOCKPROP_ENABLED()
	DISP_STOCKPROP_CAPTION()
	//}}AFX_DISPATCH_MAP
	DISP_FUNCTION_ID(CNTGraphCtrl, "AboutBox", DISPID_ABOUTBOX, AboutBox, VT_EMPTY, VTS_NONE)
END_DISPATCH_MAP()


/////////////////////////////////////////////////////////////////////////////
// Event map

BEGIN_EVENT_MAP(CNTGraphCtrl, COleControl)
	//{{AFX_EVENT_MAP(CNTGraphCtrl)
	EVENT_CUSTOM("CursorEvent", FireCursorEvent, VTS_R8  VTS_R8)
	//}}AFX_EVENT_MAP
END_EVENT_MAP()


/////////////////////////////////////////////////////////////////////////////
// Property pages

// TODO: Add more property pages as needed.  Remember to increase the count!
BEGIN_PROPPAGEIDS(CNTGraphCtrl, 3)
	PROPPAGEID(CNTGraphPropPage::guid)
	PROPPAGEID(CLSID_CColorPropPage)
	PROPPAGEID(CLSID_CFontPropPage)
END_PROPPAGEIDS(CNTGraphCtrl)


/////////////////////////////////////////////////////////////////////////////
// Initialize class factory and guid

IMPLEMENT_OLECREATE_EX(CNTGraphCtrl, "NTGRAPH.NTGraphCtrl.1",
	0x14f24365, 0x6c9d, 0x419e, 0x89, 0x94, 0xe7, 0xc9, 0x17, 0x9c, 0xa3, 0x4f)


/////////////////////////////////////////////////////////////////////////////
// Type library ID and version

IMPLEMENT_OLETYPELIB(CNTGraphCtrl, _tlid, _wVerMajor, _wVerMinor)


/////////////////////////////////////////////////////////////////////////////
// Interface IDs

const IID BASED_CODE IID_DNTGraph =
		{ 0x3b090608, 0x7603, 0x486d, { 0x9e, 0x9c, 0x9f, 0x26, 0x86, 0x4e, 0x13, 0xa0 } };
const IID BASED_CODE IID_DNTGraphEvents =
		{ 0x35000290, 0x97bd, 0x4b15, { 0xba, 0x89, 0xf4, 0xd, 0x82, 0x24, 0xdd, 0xd9 } };


/////////////////////////////////////////////////////////////////////////////
// Control type information

static const DWORD BASED_CODE _dwNTGraphOleMisc =
	OLEMISC_ACTIVATEWHENVISIBLE |
	OLEMISC_SETCLIENTSITEFIRST |
	OLEMISC_INSIDEOUT |
	OLEMISC_CANTLINKINSIDE |
	OLEMISC_RECOMPOSEONRESIZE;

IMPLEMENT_OLECTLTYPE(CNTGraphCtrl, IDS_NTGRAPH, _dwNTGraphOleMisc)


/////////////////////////////////////////////////////////////////////////////
// CNTGraphCtrl::CNTGraphCtrlFactory::UpdateRegistry -
// Adds or removes system registry entries for CNTGraphCtrl

BOOL CNTGraphCtrl::CNTGraphCtrlFactory::UpdateRegistry(BOOL bRegister)
{
	// TODO: Verify that your control follows apartment-model threading rules.
	// Refer to MFC TechNote 64 for more information.
	// If your control does not conform to the apartment-model rules, then
	// you must modify the code below, changing the 6th parameter from
	// afxRegApartmentThreading to 0.

	if (bRegister)
		return AfxOleRegisterControlClass(
			AfxGetInstanceHandle(),
			m_clsid,
			m_lpszProgID,
			IDS_NTGRAPH,
			IDB_NTGRAPH,
			afxRegApartmentThreading,
			_dwNTGraphOleMisc,
			_tlid,
			_wVerMajor,
			_wVerMinor);
	else
		return AfxOleUnregisterClass(m_clsid, m_lpszProgID);
}

//////////////////////////////////////////////////////////////////////////////
// static FONTDESC structure containing default attributes of the fonts

static const FONTDESC _fontdescTick =
  { sizeof(FONTDESC), OLESTR("Arial"), FONTSIZE( 8 ), FW_NORMAL, 
     ANSI_CHARSET, FALSE, FALSE, FALSE };

static const FONTDESC _fontdescTitle =
  { sizeof(FONTDESC), OLESTR("Arial"), FONTSIZE( 12 ), FW_BOLD, 
     ANSI_CHARSET, FALSE, FALSE, FALSE };

static const FONTDESC _fontdescLabel =
  { sizeof(FONTDESC), OLESTR("Arial"), FONTSIZE( 12 ), FW_NORMAL, 
     ANSI_CHARSET, FALSE, FALSE, FALSE };

/////////////////////////////////////////////////////////////////////////////
// CNTGraphCtrl::CNTGraphCtrl - Constructor

CNTGraphCtrl::CNTGraphCtrl() : m_fontTick( &m_xFontNotification ), 
                               m_fontTitle( &m_xFontNotification ), 
							   m_fontLabel( &m_xFontNotification )
{
	InitializeIIDs(&IID_DNTGraph, &IID_DNTGraphEvents);

	// Initialize the control's instance data.
	m_minX=m_minY=0;
	m_maxX=m_maxY=10;
	SetRange(0,1,0,1);
 	m_strLabelX = "X Axis" ;
	m_strLabelY = "Y Axis" ;
	m_strGraphTitle = "XY Graph";
	m_nGridX = 5 ;
	m_nGridY = 5;
	
	bIsElementAllocated = FALSE ;
	bFontIsCreated = FALSE ;

	nPlotIndex = 0 ;
	nPointCount = 2000 ;
	nElementCount = 2 ;
	m_ElementId=0;
    
	m_BGColor    = RGB(255,255,255);
	m_axisColor  = RGB(0,0,0);
	m_labelColor = RGB(0,0,0);
	m_gridColor  = RGB(0,0,0);
    m_cursorColor = RGB(255,0,0);
}

/////////////////////////////////////////////////////////////////////////////
// CNTGraphCtrl::~CNTGraphCtrl - Destructor

CNTGraphCtrl::~CNTGraphCtrl()
{
	// TODO: Cleanup your control's instance data here.
	for( int i = 0  ; i < nElementCount ; i++){
		mpElement[i].DeleteElement() ;
	}

	if( bFontIsCreated ) {
		delete pTickFont ;
		delete pXLabelFont;
		delete pYLabelFont;
		delete pTitleFont ;
	}
}


/////////////////////////////////////////////////////////////////////////////
// CNTGraphCtrl::OnDraw - Drawing function

void CNTGraphCtrl::OnDraw(
			CDC* pdc, const CRect& rcBounds, const CRect& rcInvalid)
{
   
    DoSuperclassPaint(pdc, rcBounds);

		  
    m_pDC = pdc;
    m_ctlRect = rcBounds;

 	PrepareForDrawing(&rcBounds);

 	CBrush hbrBackground(TranslateColor(GetBackColor()));
	pdc->FillRect (m_ctlRect,&hbrBackground);

    DrawAxis() ;
    DrawGraphTitle();
	DrawAxisLabel();

	if (m_showGrid)
			DrawGrid();
	else 
			DrawTicks();

	DrawGraphTitle();

	PlotElement() ;

	if (m_cursorMode)
		DrawCursor();
}


/////////////////////////////////////////////////////////////////////////////
// CNTGraphCtrl::DoPropExchange - Persistence support

void CNTGraphCtrl::DoPropExchange(CPropExchange* pPX)
{
	ExchangeVersion(pPX, MAKELONG(_wVerMinor, _wVerMajor));
	COleControl::DoPropExchange(pPX);

	// TODO: Call PX_ functions for each persistent custom property.
    PX_Bool(pPX,_T("ShowGrid"),m_showGrid,FALSE);
	PX_Bool(pPX,_T("CursorMode"),m_cursorMode,FALSE);
	PX_Bool(pPX,_T("ZoomMode"),m_zoomMode,FALSE);
	PX_Font(pPX, _T("TickFont"), m_fontTick, &_fontdescTick);
	PX_Font(pPX, _T("TitleFont"), m_fontTitle, &_fontdescTitle);
	PX_Font(pPX, _T("LabelFont"), m_fontLabel, &_fontdescLabel);
}


/////////////////////////////////////////////////////////////////////////////
// CNTGraphCtrl::GetControlFlags -
// Flags to customize MFC's implementation of ActiveX controls.
//
// For information on using these flags, please see MFC technical note
// #nnn, "Optimizing an ActiveX Control".
DWORD CNTGraphCtrl::GetControlFlags()
{
	DWORD dwFlags = COleControl::GetControlFlags();


	// The control will not be redrawn when making the transition
	// between the active and inactivate state.
	dwFlags |= noFlickerActivate;
	return dwFlags;
}


/////////////////////////////////////////////////////////////////////////////
// CNTGraphCtrl::OnResetState - Reset control to default state

void CNTGraphCtrl::OnResetState()
{
	COleControl::OnResetState();  // Resets defaults found in DoPropExchange

	// TODO: Reset any other control state here.
}


/////////////////////////////////////////////////////////////////////////////
// CNTGraphCtrl::AboutBox - Display an "About" box to the user

void CNTGraphCtrl::AboutBox()
{
	CDialog dlgAbout(IDD_ABOUTBOX_NTGRAPH);
	dlgAbout.DoModal();
}


#ifdef STATIC
/////////////////////////////////////////////////////////////////////////////
// CNTGraphCtrl::PreCreateWindow - Modify parameters for CreateWindowEx
BOOL CNTGraphCtrl::PreCreateWindow(CREATESTRUCT& cs)
{
	//cs.lpszClass = _T("STATIC");
	return COleControl::PreCreateWindow(cs);
}
/////////////////////////////////////////////////////////////////////////////
// CNTGraphCtrl::IsSubclassedControl - This is a subclassed control
BOOL CNTGraphCtrl::IsSubclassedControl()
{
	return TRUE;
}

/////////////////////////////////////////////////////////////////////////////
// CNTGraphCtrl::OnOcmCommand - Handle command messages

LRESULT CNTGraphCtrl::OnOcmCommand(WPARAM wParam, LPARAM lParam)
{
#ifdef _WIN32
	WORD wNotifyCode = HIWORD(wParam);
#else
	WORD wNotifyCode = HIWORD(lParam);
#endif

	// TODO: Switch on wNotifyCode here.

	return 0;
}

#endif


/////////////////////////////////////////////////////////////////////////////
////////////////////////// Source of CGraphElement //////////////////////////
/////////////////////////////////////////////////////////////////////////////
CGraphElement::CGraphElement() 
{
	    dValueX = NULL ;
		dValueY = NULL ;
		bIsPlotAvailable = FALSE ;
		bBufferAllocated = FALSE ;
		m_Color = RGB(0,0,0);
		m_bShow = TRUE;      // Added by A. Hofmann
		m_nCount = 0;        // Added by A. Hofmann
}

BOOL CGraphElement::NewElement(UINT nPoint)
{

	dValueX = new double[nPoint] ; 
	dValueY = new double[nPoint] ;  
	if ( (!dValueX) || (!dValueY) ) 
		return FALSE ;
	bBufferAllocated = TRUE ;
	return TRUE ;
}

BOOL CGraphElement::DeleteElement()
{
	if ( bBufferAllocated ) {
		delete [] dValueX;
		delete [] dValueY ;		
	}
	bBufferAllocated = FALSE ;
	return TRUE ;
}

/////////////////////////////////////////////////////////////////////
void CNTGraphCtrl::PrepareForDrawing(CRect rect)
{

	m_BGColor=TranslateColor(GetBackColor());
 
    m_ctlRect = rect ;
	CreateFont(); // Get system font for label draw 
	bFontIsCreated = TRUE ;
	CalcRect() ; // Compute rectangle 
	ResCalc();   // Compute resolution per dot.

    m_pDC->SetViewportExt (rect.right , rect.bottom );
    m_pDC->DPtoLP(&m_ctlRect);
 
}

void CNTGraphCtrl::DrawAxis()
{

	m_axisRect.NormalizeRect ();
	m_pDC->FillSolidRect (m_axisRect,m_BGColor);

	CPen *old , pen(PS_SOLID, 2, m_axisColor);
	
	old = m_pDC->SelectObject(&pen) ;
		m_pDC->MoveTo(Corrdinate(dRangeX[MIN],dRangeY[MIN]));
		m_pDC->LineTo(Corrdinate(dRangeX[MAX],dRangeY[MIN]));
		m_pDC->MoveTo(Corrdinate(dRangeX[MIN],dRangeY[MIN]));
		m_pDC->LineTo(Corrdinate(dRangeX[MIN],dRangeY[MAX]));
        m_pDC->MoveTo(Corrdinate(dRangeX[MAX],dRangeY[MIN]));
		m_pDC->LineTo(Corrdinate(dRangeX[MAX],dRangeY[MAX]));
		m_pDC->MoveTo(Corrdinate(dRangeX[MIN],dRangeY[MAX]));
		m_pDC->LineTo(Corrdinate(dRangeX[MAX],dRangeY[MAX]));
	m_pDC->SelectObject(old) ;
}

void CNTGraphCtrl::DrawGraphTitle()
{

	CFont* pOldFont;
	TEXTMETRIC tm;

	pOldFont = SelectFontObject(m_pDC, m_fontTitle);
    m_pDC->GetTextMetrics(&tm);

	m_pDC->SetTextAlign(TA_TOP | TA_CENTER);
    m_pDC->ExtTextOut((m_ctlRect.left + m_ctlRect.right) / 2,
                 (m_ctlRect.top+m_axisRect.top - tm.tmHeight) / 2,
                  ETO_CLIPPED, m_ctlRect, m_strGraphTitle, m_strGraphTitle.GetLength(),NULL);

   m_pDC->SelectObject(pOldFont);


}

void CNTGraphCtrl::DrawGrid()
{
	CPen *old , pen(PS_SOLID, 0, m_gridColor);
	CPoint m_start, m_stop ;
	int i  ;
	double x ,y ;
	double step ;

	old = m_pDC->SelectObject(&pen);
	
	// Draw vertical grid 

	step = (dRangeX[MAX] - dRangeX[MIN]) / (double)m_nGridX ;
	for( i = 1 ; i < m_nGridX ; i++ )
	{
		x = dRangeX[MIN] + (step * (double)i) ;
		m_start = Corrdinate(x,dRangeY[MIN]);
		m_stop  = Corrdinate(x,dRangeY[MAX]);
		m_pDC->MoveTo(m_start);
		m_pDC->LineTo(m_stop);
	}
	
	// Draw horizontal grid.

	step = (dRangeY[MAX] - dRangeY[MIN]) / (double)m_nGridY ;
	for( i = 1 ; i < m_nGridY ; i++ )
	{
		y = dRangeY[MIN] + (step * (double)i) ;
		m_start = Corrdinate(dRangeX[MIN],y) ;
		m_stop  = Corrdinate(dRangeX[MAX],y) ;
		m_pDC->MoveTo(m_start);
		m_pDC->LineTo(m_stop);
	}
	
	m_pDC->SelectObject(old);
}

void CNTGraphCtrl::DrawAxisLabel()
{
	CFont *pOldFont;

	int i ;
	double res , x, y  ; 
	CPoint point ;
	CSize txtSize ;
	CString str ;

	pOldFont = m_pDC->SelectObject(pTickFont);
	m_pDC->SetTextColor (m_labelColor);

	res = (dRangeY[MAX] - dRangeY[MIN]) / m_nGridY ;
	m_pDC->SetTextAlign(TA_RIGHT);
	m_pDC->SetBkMode(TRANSPARENT);

	CSize sz;
	sz.cx=0;

	// Draw Y Tick Labels
	for ( i = 0 ; i <= m_nGridY ; i++)
	{
		y = dRangeY[MIN] + (res * (double)i) ;
		point = Corrdinate(dRangeX[MIN],y) ;
		str.Format("%g",y) ;

		txtSize = m_pDC->GetTextExtent(str) ;

		if (sz.cx < txtSize.cx) sz=txtSize;

		point.x -= 5 ;
		point.y -= txtSize.cy/2 ;

		m_pDC->TextOut(point.x,point.y,str) ;
	}

	m_pDC->SelectObject(pXLabelFont);

    // Draw X Axis Title
	txtSize = m_pDC->GetTextExtent(m_strLabelX);
    point.x = m_axisRect.CenterPoint().x + (txtSize.cx/2); 
	point.y = (m_ctlRect.bottom + m_axisRect.bottom)/2;
	point.y -= (txtSize.cy - sz.cy)/2;
    
	m_pDC->TextOut(point.x,point.y,m_strLabelX);

	// Draw X Tick Labels
	m_pDC->SelectObject(pTickFont);

	res = (dRangeX[MAX] - dRangeX[MIN]) / m_nGridX ;

	for ( i = 0 ; i <= m_nGridX ; i ++ )
	{
		x = dRangeX[MIN] + ( res * (double)i);
		point = Corrdinate(x,dRangeY[MIN]);
		
		str.Format("%g",x);

		txtSize = m_pDC->GetTextExtent(str) ;

		point.x += txtSize.cx/2;
		point.y += 5 ;

		m_pDC->TextOut(point.x,point.y,str);
	}
	 
 	m_pDC->SelectObject(pYLabelFont);

	// Draw Y Axis Title
	txtSize = m_pDC->GetTextExtent(m_strLabelY);
	point.x = (m_ctlRect.left+m_axisRect.left)/2;
	point.x -= ( txtSize.cy + sz.cx )/2 ;
	point.y = m_axisRect.CenterPoint().y  - (txtSize.cx/2);
	m_pDC->TextOut(point.x,point.y,m_strLabelY);

    m_pDC->SelectObject(pOldFont);
}

//////////////////////////////////
// Draw ticks in 1/5 fine scale 
void CNTGraphCtrl::DrawTicks()
{

	CPen *old , pen(PS_SOLID, 0, m_gridColor);
	CPoint m_start, m_stop ;
	int i  ;
	double x ,y ;
	double step ;

	old = m_pDC->SelectObject(&pen);
	
	// Draw vertical Major Ticks 

	step = (dRangeX[MAX] - dRangeX[MIN]) / (double)m_nGridX ;
	for( i = 1 ; i < m_nGridX ; i++ )
	{
		x = dRangeX[MIN] + (step * (double)i) ;
		m_start = Corrdinate(x,dRangeY[MIN]);
		m_stop = m_start; m_stop.y -= 5;	// Major Ticks on Botom
		m_pDC->MoveTo(m_start);
		m_pDC->LineTo(m_stop);
	}

	for( i = 1 ; i < m_nGridX ; i++ )
	{
		x = dRangeX[MIN] + (step * (double)i) ;
		m_start = Corrdinate(x,dRangeY[MAX]);
		m_stop = m_start; m_stop.y += 5;	// Major Ticks on Top
		m_pDC->MoveTo(m_start);
		m_pDC->LineTo(m_stop);
	}
	

	// Draw horizontal Major Ticks
	step = (dRangeY[MAX] - dRangeY[MIN]) / (double)m_nGridY ;
	for( i = 1 ; i < m_nGridY ; i++ )
	{
		y = dRangeY[MIN] + (step * (double)i) ;
		m_start = Corrdinate(dRangeX[MIN],y) ;
		m_stop  = m_start; m_stop.x += 5;	 // Major Ticks on Left
		m_pDC->MoveTo(m_start);
		m_pDC->LineTo(m_stop);
	}
	
	for( i = 1 ; i < m_nGridY ; i++ )
	{
		y = dRangeY[MIN] + (step * (double)i) ;
		m_start = Corrdinate(dRangeX[MAX],y) ;
		m_stop  = m_start; m_stop.x -= 5;	// Major Ticks on Right
		m_pDC->MoveTo(m_start);
		m_pDC->LineTo(m_stop);
	}

	m_pDC->SelectObject(old);
}

void CNTGraphCtrl::PlotElement()
{
	
	// If there is no data available for plot then return .
	if ( !nPlotIndex ) return ;
		
	CPen *old , *pen ;
	
	CPoint pt;
	int i;
	
	for( i = 0 ; i < nElementCount ; i++) {

        /////////////////////////////
		// Added by A.Hofmann
		/////////////////////////////
		// Check show state of serie
		if ( ! mpElement[i].m_bShow )
			continue;

		// Create the new pen as the color of serie 
		pen = new CPen(PS_SOLID /*mpElement[i].m_lineType*/,
			           1 /*mpElement[i].m_lineWidth*/,
					   mpElement[i].m_Color);

		old = m_pDC->SelectObject(pen);

		// Calculate the corrdinate of ploting point.
		pt = Corrdinate(mpElement[i].dValueX[0],mpElement[i].dValueY[0]) ;

		if (m_axisRect.PtInRect(pt))
						m_pDC->MoveTo(pt);
		else {

			if ( pt.y < m_axisRect.bottom) pt.y=m_axisRect.bottom;
			if ( pt.y > m_axisRect.top ) pt.y=m_axisRect.top;
			if ( pt.x < m_axisRect.left ) pt.x=m_axisRect.left;
			if ( pt.x > m_axisRect.right ) pt.x=m_axisRect.right;
			
			m_pDC->MoveTo(pt);
		}				
		
		// Start plot all available data .
		// Changed by A. Hofmann
		for(int index = 1 ; index <= mpElement[i].m_nCount;/*nPlotIndex;*/ index++){
			pt = Corrdinate(mpElement[i].dValueX[index], mpElement[i].dValueY[index]) ;

            // Clipping to Axis Rectangle
            if (m_axisRect.PtInRect(pt))
				               m_pDC->LineTo(pt) ;		
			else
				continue;

		}
		m_pDC->SelectObject(old);
		delete pen ;
	}
	
}

void CNTGraphCtrl::DrawCursor()
{

	if(bIsCursorInRange) {

		m_axisRect.NormalizeRect ();

		CPen *old , pen(PS_SOLID, 1, m_cursorColor);
	
		old = m_pDC->SelectObject(&pen) ;
			m_pDC->MoveTo(Corrdinate(m_dXCur,dRangeY[MIN]));
			m_pDC->LineTo(Corrdinate(m_dXCur,dRangeY[MAX]));
			m_pDC->MoveTo(Corrdinate(dRangeX[MIN],m_dYCur));
			m_pDC->LineTo(Corrdinate(dRangeX[MAX],m_dYCur));
  		m_pDC->SelectObject(old) ;
	}
}

void CNTGraphCtrl::ClearGraph()
{
	// Added by A. Hofmann
	for(int i = 0 ; i < nElementCount; i++ )
		mpElement[i].m_nCount = 0;

	nPlotIndex = 0 ;
	InvalidateRect(m_ctlRect);
}
/////////////////////////////////
// Allocate memory for plotting 
BOOL CNTGraphCtrl::CreateElement(long nElement)
{
	
	if( !bIsElementAllocated )
	{
		for(int i = 0 ; i < nElementCount ; i++ ) {
			if ( !mpElement[i].NewElement(nElement)) {
				AfxMessageBox("Can not allocate element!") ;
				return FALSE ;
			}
		}
	}
	
	nPointCount = nElement ;
	bIsElementAllocated = TRUE ;
	return TRUE ;

}

BOOL CNTGraphCtrl::SetRange(double MinX, double MaxX, double MinY, double MaxY) 
{
	dRangeY[MIN] = MinY ;
	dRangeY[MAX] = MaxY ;
	dRangeX[MAX] = MaxX ;
	dRangeX[MIN] = MinX ;
    ResCalc();
	InvalidateControl();
	return TRUE;
}

BOOL CNTGraphCtrl::SetXYValue(double X, double Y, long index, short iElementId) 
{
	if(!bIsElementAllocated ) return FALSE;
	if (iElementId > (nElementCount-1)) return FALSE;

	// Prevent writting to unallocated buffer 
	if(index >= nPointCount ) return FALSE;
	
	// Clip the ploting area if it exceed ranged .
	if(X > dRangeX[MAX] ) X = dRangeX[MAX] ;
	if(X < dRangeX[MIN] ) X = dRangeX[MIN] ;
	if(Y > dRangeY[MAX] ) Y = dRangeY[MAX] ;
	if(Y < dRangeY[MIN] ) Y = dRangeY[MIN];

	
	mpElement[iElementId].dValueX[index] = X ;
	mpElement[iElementId].dValueY[index] = Y ;
	mpElement[iElementId].bIsPlotAvailable = TRUE ;
	mpElement[iElementId].m_nCount = index; // Added by A. Hofmann

	nPlotIndex = index ;
	return TRUE;
}

CPoint CNTGraphCtrl::Corrdinate(double x, double y)
{
	double rx , ry ;
	int xPixel , yPixel ;
	CPoint retPt ;

	rx = x - dRangeX[MIN] ; // Calculate horizontal offset from origin
	ry = y - dRangeY[MIN] ; // Calculate vertical offset from origin .

	// Convert offset to be number of pixel on screen .
	xPixel = (int)(rx / dResX) ; 
	yPixel = (int)(ry / dResY) ;

	//Calulate point to be drawn .
	retPt.x= xPixel + m_axisRect.left ;
	retPt.y= m_axisRect.bottom - yPixel; 
	return retPt ;
}

void CNTGraphCtrl::CalcRect()
{
	int offset = 30;
    
	CSize txtXLabelSize,txtYLabelSize,txtTitleSize ;
	CString str ;
   	CPaintDC dc(this); // device context for painting
	CFont *pOldFont ;
	pOldFont = dc.SelectObject(pTickFont);

    int bigY = __max(abs((int)dRangeY[MAX]),abs((int)dRangeY[MIN]));
	str.Format("%g",(double)bigY);
	txtYLabelSize = dc.GetTextExtent(str);
	str.Format("%g",dRangeX[MAX]);
	txtXLabelSize = dc.GetTextExtent(str);
	
	dc.SelectObject (pTitleFont);
	txtTitleSize = dc.GetTextExtent (m_strLabelX);
	dc.SelectObject(pOldFont);

	m_axisRect.left  = m_ctlRect.left + txtTitleSize.cy+txtYLabelSize.cx + offset;
	m_axisRect.right = m_ctlRect.right - (txtXLabelSize.cx/2) - (offset/2);
	m_axisRect.top   = m_ctlRect.top + txtTitleSize.cy + (offset/2);
	m_axisRect.bottom= m_ctlRect.bottom - (txtTitleSize.cy+txtXLabelSize.cy) - (offset/2); 
}

////////////////////////////////
//Calculate resolution per dot
void CNTGraphCtrl::ResCalc()
{
	double dpixelx, dpixely ;

	dpixelx = (double)m_axisRect.Width() ;
	dpixely = (double)m_axisRect.Height() ;
	dResY = (dRangeY[MAX] - dRangeY[MIN]) / dpixely ;
	dResX = (dRangeX[MAX] - dRangeX[MIN]) / dpixelx ;

}
/////////////////////////////////////////////////////////////////////////////
// Create desired fonts for draw labels on x axis and y axis and graph title.
void CNTGraphCtrl::CreateFont()
{
		
	//Create system font ..
	LOGFONT lf;
	CFont *pStockFont, *pOldFont;

	pOldFont = SelectFontObject(m_pDC, m_fontTick);
	pStockFont = SelectFontObject(m_pDC, m_fontTick);
	
    // Retrieve a copy of the LOGFONT structure 
	// for a currently selected stock font.
	if (pStockFont)
        pStockFont->GetLogFont(&lf);

	// Create a new font for Ticks
	pTickFont = new CFont() ;
	pTickFont->CreateFontIndirect(&lf);

	pOldFont = SelectFontObject(m_pDC, m_fontTitle);
	pStockFont = SelectFontObject(m_pDC, m_fontTitle);
	
	// Retrieve a copy of the LOGFONT structure 
	// for a currently selected stock font.
	if (pStockFont)
        pStockFont->GetLogFont(&lf);
	
	// Create a new font for Title
	pTitleFont = new CFont();
	pTitleFont->CreateFontIndirect(&lf);

	pOldFont = SelectFontObject(m_pDC, m_fontLabel);
	pStockFont = SelectFontObject(m_pDC, m_fontLabel);
	    
	// Retrieve a copy of the LOGFONT structure 
	// for a currently selected stock font.
	if (pStockFont)
        pStockFont->GetLogFont(&lf);
	
	pXLabelFont = new CFont() ;
	pXLabelFont->CreateFontIndirect(&lf);

	// Rotate font 90 degree for Y axis label
	SetGraphicsMode( m_pDC->m_hDC, GM_ADVANCED );
	lf.lfOrientation = 900 ; 
	lf.lfEscapement = 900 ;
	
	pYLabelFont = new CFont() ;
	pYLabelFont->CreateFontIndirect(&lf);

    m_pDC->SelectObject(pOldFont);

}
void CNTGraphCtrl::CursorPosition(CPoint point) 
{
     double rx,ry;

	 rx = (double)((point.x - m_axisRect.left)*dResX)   + dRangeX[MIN];
	 ry = (double)((m_axisRect.bottom - point.y)*dResY) + dRangeY[MIN];


	if ( point.x < m_axisRect.right && point.x > m_axisRect.left && 
		 point.y > m_axisRect.top && point.y < m_axisRect.bottom )
	{
		m_dXCur = rx;
		m_dYCur = ry;
		
		//Fire Cursor Position Event
		FireCursorEvent(rx,ry);

		bIsCursorInRange=TRUE;
		return;
    }
    else
	{
		bIsCursorInRange=FALSE;
		return;
	}
}

void CNTGraphCtrl::OnShowGridChanged() 
{
    InvalidateControl();
	SetModifiedFlag();
}

void CNTGraphCtrl::OnXLabelChanged() 
{
    InvalidateControl();
	SetModifiedFlag();
}

void CNTGraphCtrl::OnYLabelChanged() 
{
	InvalidateControl();
	SetModifiedFlag();
}

void CNTGraphCtrl::OnGridColorChanged() 
{
	InvalidateControl();
	SetModifiedFlag();
}

void CNTGraphCtrl::OnLabelColorChanged() 
{
	InvalidateControl();
	SetModifiedFlag();
}

void CNTGraphCtrl::OnAxisColorChanged() 
{
	InvalidateControl();
	SetModifiedFlag();
}

void CNTGraphCtrl::OnNGridXChanged() 
{
	InvalidateControl();
	SetModifiedFlag();
}

void CNTGraphCtrl::OnNGridYChanged() 
{
	InvalidateControl();
	SetModifiedFlag();
}

void CNTGraphCtrl::OnMinXChanged() 
{
	SetRange(m_minX,m_maxX,m_minY,m_maxY);
	InvalidateControl();
	SetModifiedFlag();
}

void CNTGraphCtrl::OnMaxXChanged() 
{
   	SetRange(m_minX,m_maxX,m_minY,m_maxY);
	InvalidateControl();
	SetModifiedFlag();
}

void CNTGraphCtrl::OnMinYChanged() 
{
	SetRange(m_minX,m_maxX,m_minY,m_maxY);
	InvalidateControl();
	SetModifiedFlag();
}

void CNTGraphCtrl::OnMaxYChanged() 
{
	SetRange(m_minX,m_maxX,m_minY,m_maxY);
	InvalidateControl();
	SetModifiedFlag();
}


short CNTGraphCtrl::GetElement() { return m_ElementId; }

void CNTGraphCtrl::SetElement(short nNewValue) 
{
	m_ElementId = nNewValue;
	if (m_ElementId <0) 
		m_ElementId=0;
	SetModifiedFlag();
}

short CNTGraphCtrl::GetElementCount() {	return nElementCount;}

void CNTGraphCtrl::SetElementCount(short nNewValue) 
{
    nElementCount = nNewValue;
	if (nElementCount <0) 
		nElementCount=0;
	SetModifiedFlag();
}

void CNTGraphCtrl::OnCursorModeChanged() 
{
	InvalidateControl();
	SetModifiedFlag();
}

void CNTGraphCtrl::OnGraphTitleChanged() 
{
    InvalidateControl();
	SetModifiedFlag();
}

void CNTGraphCtrl::OnCursorColorChanged() 
{
    InvalidateControl();
	SetModifiedFlag();
}


void CNTGraphCtrl::OnZoomModeChanged() 
{
    AfxMessageBox("Not implemented yet, but reserved!");
	SetModifiedFlag();
}


void CNTGraphCtrl::OnLButtonDown(UINT nFlags, CPoint point) 
{

	CursorPosition(point);     // Fire CursorEvent
	InvalidateControl();
	SetModifiedFlag();

/*				
    if (::GetCapture() == m_hWnd) // in capture mode
	{
        POINT p=point;
		::ClientToScreen(m_hWnd, &p);
		CursorPosition(p);        // Fire CursorEvent
		InvalidateControl();
		SetModifiedFlag();		
		
    } else  // leave control area and start mouse leave event 
		TRACKMOUSEEVENT t = {sizeof(TRACKMOUSEEVENT),TME_LEAVE,m_hWnd,0} ;
*/ 
	
	COleControl::OnLButtonDown(nFlags, point);
}


void CNTGraphCtrl::OnElementColorChanged() 
{
	mpElement[m_ElementId].m_Color = m_elementColor;
    InvalidateControl();
	SetModifiedFlag();
}

////////////////////////////////////////////////////////
//  Implementation of the Custom Font Proprties
LPDISPATCH CNTGraphCtrl::GetTickFont() { return m_fontTick.GetFontDispatch( ); }

void CNTGraphCtrl::SetTickFont(LPDISPATCH newValue) 
{
	m_fontTick.InitializeFont( &_fontdescTick, newValue);
    OnFontChanged();    //notify any changes
    SetModifiedFlag( );
}

LPDISPATCH CNTGraphCtrl::GetTitleFont() { return m_fontTitle.GetFontDispatch( );}

void CNTGraphCtrl::SetTitleFont(LPDISPATCH newValue) 
{
	m_fontTitle.InitializeFont( &_fontdescTitle, newValue);
    OnFontChanged();    //notify any changes
    SetModifiedFlag( );
}

LPDISPATCH CNTGraphCtrl::GetLabelFont() { return m_fontLabel.GetFontDispatch( ); }

void CNTGraphCtrl::SetLabelFont(LPDISPATCH newValue) 
{
	m_fontLabel.InitializeFont( &_fontdescLabel, newValue);
    OnFontChanged();    //notify any changes
    SetModifiedFlag( );

}

void CNTGraphCtrl::OnFontChanged() 
{
	InvalidateControl();
	SetModifiedFlag( );
	COleControl::OnFontChanged();
}

////////////////////////////////////////////////////////
// New Method Show/Hide Graph Element
// Added by A.Hofmann
void CNTGraphCtrl::SetShowElement(BOOL bShow) 
{
	mpElement[m_ElementId].m_bShow = bShow;
	InvalidateControl();
	SetModifiedFlag();
}

////////////////////////////////////////////////////////
// New Method to copy a control bitmap to the clipboard
// Code Project Article: "Clipboard Copy in a Nutshell"
// by Keith Rule
void CNTGraphCtrl::Copy2Clipboard() 
{
    CRect rect;
    CClientDC dc(this);
    CDC memDC;
    CBitmap bitmap;
    GetClientRect(&rect);
    
	// Create memDC
    memDC.CreateCompatibleDC(&dc);
    bitmap.CreateCompatibleBitmap(&dc, rect.Width(), rect.Height());
    CBitmap* pOldBitmap = memDC.SelectObject(&bitmap);
    
	// Fill in memDC
    memDC.FillSolidRect(rect, dc.GetBkColor());
    OnDraw(&memDC, rect, rect);
    
	// Copy contents of memDC to clipboard
    OpenClipboard();
    EmptyClipboard();
    SetClipboardData(CF_BITMAP, bitmap.GetSafeHandle()); // CF_METAFILEPICT
    CloseClipboard();
    
	// Clean up
    memDC.SelectObject(pOldBitmap);
    bitmap.Detach();	

}