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Posted 20 Mar 2002

Scientific charting control

, 17 Jan 2005
Multi-purpose scientific charting control.
XGRAPH10.dll
XGraphTest.exe
Include
Release
res
bitmap1.bmp
bs1.bmp
bs2.bmp
bs3.bmp
bs4.bmp
bs5.bmp
Toolbar.bmp
XGraphTest.ico
XGraphTestDoc.ico
XGRAPH10.lib
XGRAPH10d.lib
XGraphTest.clw
XGraphTest.dsp
XGraphTest.dsw
XGRAPH10.dll
bitmap2.bmp
default1.bin
Logo.bmp
Screen1.bmp
xgraphtest
XGraph.clw
xgraph.def
XGRAPH.dsw
XGRAPH.dsp
bitmap1.bmp
bs1.bmp
bs2.bmp
bs3.bmp
bs4.bmp
bs5.bmp
lib
XGRAPH10.dll
XGRAPH10.exp
XGRAPH10.lib
//***************************************************************************
//
// AUTHOR:  James White (feel free to remove or otherwise mangle any part)
//
//***************************************************************************
#include "stdafx.h"
#include "ColorButton.h"

//***********************************************************************
//**                         MFC Debug Symbols                         **
//***********************************************************************
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//***********************************************************************
//**                            DDX Method                            **
//***********************************************************************

void AFXAPI DDX_ColorButton(CDataExchange *pDX, int nIDC, COLORREF& crColour)
{
    HWND hWndCtrl = pDX->PrepareCtrl(nIDC);
    ASSERT (hWndCtrl != NULL);                
    
    CColorButton* pColourButton = (CColorButton*) CWnd::FromHandle(hWndCtrl);
    if (pDX->m_bSaveAndValidate)
    {
		crColour = pColourButton->Color;
    }
    else // initializing
    {
		pColourButton->Color = crColour;
    }
}

//***********************************************************************
//**                             Constants                             **
//***********************************************************************
const int g_ciArrowSizeX = 4 ;
const int g_ciArrowSizeY = 2 ;

//***********************************************************************
//**                            MFC Macros                            **
//***********************************************************************
IMPLEMENT_DYNCREATE(CColorButton, CButton)

//***********************************************************************
// Method:	CColorButton::CColorButton(void)
// Notes:	Default Constructor.
//***********************************************************************
CColorButton::CColorButton(void):
	_Inherited(),
	m_Color(CLR_DEFAULT),
	m_DefaultColor(::GetSysColor(COLOR_APPWORKSPACE)),
	m_strDefaultText(_T("Automatic")),
	m_strCustomText(_T("More Colors...")),
	m_bPopupActive(FALSE),
	m_bTrackSelection(FALSE)
{
}

//***********************************************************************
// Method:	CColorButton::~CColorButton(void)
// Notes:	Destructor.
//***********************************************************************
CColorButton::~CColorButton(void)
{
}

//***********************************************************************
// Method:	CColorButton::GetColor()
// Notes:	None.
//***********************************************************************
COLORREF CColorButton::GetColor(void) const
{
	return m_Color;
}


//***********************************************************************
// Method:	CColorButton::SetColor()
// Notes:	None.
//***********************************************************************
void CColorButton::SetColor(COLORREF Color)
{
	m_Color = Color;

	if (::IsWindow(m_hWnd)) 
        RedrawWindow();
}


//***********************************************************************
// Method:	CColorButton::GetDefaultColor()
// Notes:	None.
//***********************************************************************
COLORREF CColorButton::GetDefaultColor(void) const
{
	return m_DefaultColor;
}

//***********************************************************************
// Method:	CColorButton::SetDefaultColor()
// Notes:	None.
//***********************************************************************
void CColorButton::SetDefaultColor(COLORREF Color)
{
	m_DefaultColor = Color;
}

//***********************************************************************
// Method:	CColorButton::SetCustomText()
// Notes:	None.
//***********************************************************************
void CColorButton::SetCustomText(LPCTSTR tszText)
{
	m_strCustomText = tszText;
}

//***********************************************************************
// Method:	CColorButton::SetDefaultText()
// Notes:	None.
//***********************************************************************
void CColorButton::SetDefaultText(LPCTSTR tszText)
{
	m_strDefaultText = tszText;
}


//***********************************************************************
// Method:	CColorButton::SetTrackSelection()
// Notes:	None.
//***********************************************************************
void CColorButton::SetTrackSelection(BOOL bTrack)
{
	m_bTrackSelection = bTrack;
}

//***********************************************************************
// Method:	CColorButton::GetTrackSelection()
// Notes:	None.
//***********************************************************************
BOOL CColorButton::GetTrackSelection(void) const
{
	return m_bTrackSelection;
}

//***********************************************************************
//**                         CButton Overrides                         **
//***********************************************************************
void CColorButton::PreSubclassWindow() 
{
    ModifyStyle(0, BS_OWNERDRAW);      

    _Inherited::PreSubclassWindow();
}

//***********************************************************************
//**                         Message Handlers                         **
//***********************************************************************
BEGIN_MESSAGE_MAP(CColorButton, CButton)
    //{{AFX_MSG_MAP(CColorButton)
    ON_CONTROL_REFLECT_EX(BN_CLICKED, OnClicked)
    ON_WM_CREATE()
    //}}AFX_MSG_MAP
    ON_MESSAGE(CPN_SELENDOK,     OnSelEndOK)
    ON_MESSAGE(CPN_SELENDCANCEL, OnSelEndCancel)
    ON_MESSAGE(CPN_SELCHANGE,    OnSelChange)
END_MESSAGE_MAP()


//***********************************************************************
// Method:	CColorButton::OnSelEndOK()
// Notes:	None.
//***********************************************************************
LONG CColorButton::OnSelEndOK(UINT lParam, LONG /*wParam*/)
{
	m_bPopupActive = FALSE;

    COLORREF OldColor = m_Color;
	
	Color = (COLORREF)lParam;

    CWnd *pParent = GetParent();

    if (pParent) 
	{
        pParent->SendMessage(CPN_CLOSEUP, lParam, (WPARAM) GetDlgCtrlID());
        pParent->SendMessage(CPN_SELENDOK, lParam, (WPARAM) GetDlgCtrlID());
    }

    if (OldColor != m_Color)
        if (pParent) pParent->SendMessage(CPN_SELCHANGE, m_Color, (WPARAM) GetDlgCtrlID());

    return TRUE;
}


//***********************************************************************
// Method:	CColorButton::OnSelEndCancel()
// Notes:	None.
//***********************************************************************
LONG CColorButton::OnSelEndCancel(UINT lParam, LONG /*wParam*/)
{
	m_bPopupActive = FALSE;
	
	Color = (COLORREF)lParam;

    CWnd *pParent = GetParent();

    if (pParent) 
	{
        pParent->SendMessage(CPN_CLOSEUP, lParam, (WPARAM) GetDlgCtrlID());
        pParent->SendMessage(CPN_SELENDCANCEL, lParam, (WPARAM) GetDlgCtrlID());
    }

    return TRUE;
}


//***********************************************************************
// Method:	CColorButton::OnSelChange()
// Notes:	None.
//***********************************************************************
LONG CColorButton::OnSelChange(UINT lParam, LONG /*wParam*/)
{
    if (m_bTrackSelection) 
		Color = (COLORREF)lParam;

    CWnd *pParent = GetParent();

    if (pParent) pParent->SendMessage(CPN_SELCHANGE, lParam, (WPARAM) GetDlgCtrlID());

    return TRUE;
}

//***********************************************************************
// Method:	CColorButton::OnCreate()
// Notes:	None.
//***********************************************************************
int CColorButton::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
    if (CButton::OnCreate(lpCreateStruct) == -1)
        return -1;

    return 0;
}

//***********************************************************************
// Method:	CColorButton::OnClicked()
// Notes:	None.
//***********************************************************************
BOOL CColorButton::OnClicked()
{
	m_bPopupActive = TRUE;

    CRect rDraw;
    GetWindowRect(rDraw);

    new CColourPopup(CPoint(rDraw.left, rDraw.bottom),		// Point to display popup
                     m_Color,								// Selected colour
                     this,									// parent
                     m_strDefaultText,						// "Default" text area
                     m_strCustomText);						// Custom Text

    CWnd *pParent = GetParent();

    if (pParent)
        pParent->SendMessage(CPN_DROPDOWN, (LPARAM)m_Color, (WPARAM) GetDlgCtrlID());

    return TRUE;
}



//***********************************************************************
// Method:	CColorButton::DrawItem()
// Notes:	None.
//***********************************************************************
void CColorButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
	ASSERT(lpDrawItemStruct);

	CDC*    pDC      = CDC::FromHandle(lpDrawItemStruct->hDC);
	UINT    state    = lpDrawItemStruct->itemState;
    CRect   rDraw    = lpDrawItemStruct->rcItem;
	CRect	rArrow;

	if (m_bPopupActive)
		state |= ODS_SELECTED|ODS_FOCUS;

	//******************************************************
	//**                  Draw Outer Edge
	//******************************************************
	UINT uFrameState = DFCS_BUTTONPUSH|DFCS_ADJUSTRECT;

	if (state & ODS_SELECTED)
		uFrameState |= DFCS_PUSHED;

	if (state & ODS_DISABLED)
		uFrameState |= DFCS_INACTIVE;
	
	pDC->DrawFrameControl(&rDraw,
						  DFC_BUTTON,
						  uFrameState);


	if (state & ODS_SELECTED)
		rDraw.OffsetRect(1,1);

	//******************************************************
	//**                     Draw Focus
	//******************************************************
	if (state & ODS_FOCUS) 
    {
		RECT rFocus = {rDraw.left,
					   rDraw.top,
					   rDraw.right - 1,
					   rDraw.bottom};
  
        pDC->DrawFocusRect(&rFocus);
    }

	rDraw.DeflateRect(::GetSystemMetrics(SM_CXEDGE),
					  ::GetSystemMetrics(SM_CYEDGE));

	//******************************************************
	//**                     Draw Arrow
	//******************************************************
	rArrow.left		= rDraw.right - g_ciArrowSizeX - ::GetSystemMetrics(SM_CXEDGE) /2;
	rArrow.right	= rArrow.left + g_ciArrowSizeX;
	rArrow.top		= (rDraw.bottom + rDraw.top)/2 - g_ciArrowSizeY / 2;
	rArrow.bottom	= (rDraw.bottom + rDraw.top)/2 + g_ciArrowSizeY / 2;

	DrawArrow(pDC,
			  &rArrow,
			  0,
			  (state & ODS_DISABLED) 
			  ? ::GetSysColor(COLOR_GRAYTEXT) 
			  : RGB(0,0,0));


	rDraw.right = rArrow.left - ::GetSystemMetrics(SM_CXEDGE)/2;

	//******************************************************
	//**                   Draw Separator
	//******************************************************
	pDC->DrawEdge(&rDraw,
				  EDGE_ETCHED,
				  BF_RIGHT);

	rDraw.right -= (::GetSystemMetrics(SM_CXEDGE) * 2) + 1 ;
				  
	//******************************************************
	//**                     Draw Color
	//******************************************************
	if ((state & ODS_DISABLED) == 0)
	{
		pDC->FillSolidRect(&rDraw,
						   (m_Color == CLR_DEFAULT)
						   ? m_DefaultColor
						   : m_Color);

		::FrameRect(pDC->m_hDC,
					&rDraw,
					(HBRUSH)::GetStockObject(BLACK_BRUSH));
	}
}


//***********************************************************************
//**                          Static Methods                          **
//***********************************************************************

//***********************************************************************
// Method:	CColorButton::DrawArrow()
// Notes:	None.
//***********************************************************************
void CColorButton::DrawArrow(CDC* pDC, 
							 RECT* pRect, 
							 int iDirection,
							 COLORREF clrArrow /*= RGB(0,0,0)*/)
{
	POINT ptsArrow[3];

	switch (iDirection)
	{
		case 0 : // Down
		{
			ptsArrow[0].x = pRect->left;
			ptsArrow[0].y = pRect->top;
			ptsArrow[1].x = pRect->right;
			ptsArrow[1].y = pRect->top;
			ptsArrow[2].x = (pRect->left + pRect->right)/2;
			ptsArrow[2].y = pRect->bottom;
			break;
		}

		case 1 : // Up
		{
			ptsArrow[0].x = pRect->left;
			ptsArrow[0].y = pRect->bottom;
			ptsArrow[1].x = pRect->right;
			ptsArrow[1].y = pRect->bottom;
			ptsArrow[2].x = (pRect->left + pRect->right)/2;
			ptsArrow[2].y = pRect->top;
			break;
		}

		case 2 : // Left
		{
			ptsArrow[0].x = pRect->right;
			ptsArrow[0].y = pRect->top;
			ptsArrow[1].x = pRect->right;
			ptsArrow[1].y = pRect->bottom;
			ptsArrow[2].x = pRect->left;
			ptsArrow[2].y = (pRect->top + pRect->bottom)/2;
			break;
		}

		case 3 : // Right
		{
			ptsArrow[0].x = pRect->left;
			ptsArrow[0].y = pRect->top;
			ptsArrow[1].x = pRect->left;
			ptsArrow[1].y = pRect->bottom;
			ptsArrow[2].x = pRect->right;
			ptsArrow[2].y = (pRect->top + pRect->bottom)/2;
			break;
		}
	}
	
	CBrush brsArrow(clrArrow);
	CPen penArrow(PS_SOLID, 1 , clrArrow);

	CBrush* pOldBrush = pDC->SelectObject(&brsArrow);
	CPen*   pOldPen   = pDC->SelectObject(&penArrow);
	
	pDC->SetPolyFillMode(WINDING);
	pDC->Polygon(ptsArrow, 3);

	pDC->SelectObject(pOldBrush);
	pDC->SelectObject(pOldPen);
}

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About the Author

Gunnar Bolle
Web Developer
Germany Germany
No Biography provided

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Article Copyright 2002 by Gunnar Bolle
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