XCmyk - CMYK to RGB Calculator with source code

//
//	Class:		CKnobControlST
//
//	Compiler:	Visual C++
//	Tested on:	Visual C++ 6.0
//
//	Version:	See GetVersionC() or GetVersionI()
//
//	Created:	15/June/2003
//	Updated:	15/June/2003
//
//	Author:		Davide Calabro'		davide_calabro@yahoo.com
//									http://www.softechsoftware.it
//
//	Disclaimer
//	----------
//	THIS SOFTWARE AND THE ACCOMPANYING FILES ARE DISTRIBUTED "AS IS" AND WITHOUT
//	ANY WARRANTIES WHETHER EXPRESSED OR IMPLIED. NO REPONSIBILITIES FOR POSSIBLE
//	DAMAGES OR EVEN FUNCTIONALITY CAN BE TAKEN. THE USER MUST ASSUME THE ENTIRE
//	RISK OF USING THIS SOFTWARE.
//
//	Terms of use
//	------------
//	THIS SOFTWARE IS FREE FOR PERSONAL USE OR FREEWARE APPLICATIONS.
//	IF YOU USE THIS SOFTWARE IN COMMERCIAL OR SHAREWARE APPLICATIONS YOU
//	ARE GENTLY ASKED TO DONATE 5$ (FIVE U.S. DOLLARS) TO THE AUTHOR:
//
//		Davide Calabro'
//		P.O. Box 65
//		21019 Somma Lombardo (VA)
//		Italy
//
#ifndef KNOBCONTROLST_H
#define KNOBCONTROLST_H

#include <gdiplus.h>
#include <math.h>

// Return values
#ifndef	KNOBCONTROLST_OK
#define	KNOBCONTROLST_OK					0
#endif
#ifndef	KNOBCONTROLST_BADPARAM
#define	KNOBCONTROLST_BADPARAM				1
#endif
#ifndef	KNOBCONTROLST_INVALIDRESOURCE
#define	KNOBCONTROLST_INVALIDRESOURCE		2
#endif

class CKnobControlST : public CSliderCtrl
{
public:
	CKnobControlST();
	virtual ~CKnobControlST();

	DWORD SetIcon(int nIcon, BOOL bRepaint = TRUE, HINSTANCE hInstance = NULL);
	DWORD SetIcon(HICON hIcon, BOOL bRepaint = TRUE);

	void SetColors(Color cFgColor, Color cBkColor, BOOL bRepaint = TRUE);
	void SetFgColor(Color cFgColor, BOOL bRepaint = TRUE);
	void SetBkColor(Color cBkColor, BOOL bRepaint = TRUE);
	void SetScaleColor(Color cColor, BOOL bRepaint = TRUE);

	void SetAlpha(BYTE byAlpha, BOOL bRepaint = TRUE);
	BYTE GetAlpha();

	void ShowLargeScale(BOOL bShow, BOOL bRepaint = TRUE);
	void ShowSmallScale(BOOL bShow, BOOL bRepaint = TRUE);
	void SetLargeChangeValue(int nLargeChange, BOOL bRepaint = TRUE);
	void SetSmallChangeValue(int nSmallChange, BOOL bRepaint = TRUE);

	void SetTooltipText(int nId, BOOL bActivate = TRUE);
	void SetTooltipText(LPCTSTR lpszText, BOOL bActivate = TRUE);
	void ActivateTooltip(BOOL bActivate = TRUE);

	DWORD SetChangeCallback(HWND hWnd, UINT nMessage, WPARAM wParam = 0, LPARAM lParam = 0);

	DWORD DrawTransparent(BOOL bRepaint = FALSE);
	DWORD SetBk(CDC* pDC);

	static short GetVersionI()		{return 10;}
	static LPCTSTR GetVersionC()	{return (LPCTSTR)_T("1.0");}

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CKnobControlST)
	public:
	virtual BOOL PreTranslateMessage(MSG* pMsg);
	//}}AFX_VIRTUAL

protected:
	//{{AFX_MSG(CKnobControlST)
	afx_msg void OnPaint();
	afx_msg BOOL OnEraseBkgnd(CDC* pDC);
	afx_msg HBRUSH CtlColor(CDC* pDC, UINT nCtlColor);
	afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
	afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
	afx_msg void OnMouseMove(UINT nFlags, CPoint point);
	afx_msg BOOL OnMouseWheel(UINT nFlags, short zDelta, CPoint pt);
	//}}AFX_MSG

	virtual DWORD OnDrawBackground(Graphics* pGfx, LPCRECT pRect);
	virtual DWORD OnDrawIcon(Graphics* pGfx, Rect* rpKnob);

	CToolTipCtrl	m_ToolTip;

	BOOL			m_bDrawTransparent;	// Draw transparent?
	BOOL			m_bShowSmallScale;
	BOOL			m_bShowLargeScale;
	int				m_nLargeChange;
	int				m_nSmallChange;
	Color			m_cFgColor;
	Color			m_cBkColor;
	Color			m_cScaleColor;
	Rect			m_rKnob;
	Point			m_pntKnob;
	BOOL			m_bIsKnobRotating;

	HICON			m_hIcon;
	BYTE			m_cyIcon;
	BYTE			m_cxIcon;

#pragma pack(1)
	typedef struct _STRUCT_CALLBACK
	{
		HWND		hWnd;			// Handle to window
		UINT		nMessage;		// Message identifier
		WPARAM		wParam;
		LPARAM		lParam;
	} STRUCT_CALLBACK;
#pragma pack()

	STRUCT_CALLBACK	m_csCallbacks;

private:
	void FreeResources(BOOL bCheckForNULL = TRUE);
	void DrawItem(Graphics* pGfx);
	void DrawInsetCircle(Graphics* g, Rect r, Pen* p);
	void PaintBk(Graphics* pGfx);
	Point GetKnobPosition(Rect* rKnob);
	Point GetMarkerPoint(int length, int Value, Rect* rKnob);
	int GetValueFromPosition(Point p);
	Color OffsetColor(Color cColor, short shOffset);
	void InitToolTip();
	void SendChangeCallback();

	CDC				m_dcBk;
	CBitmap			m_bmpBk;
	CBitmap*		m_pbmpOldBk;

	DECLARE_MESSAGE_MAP()
};

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif