Color components editor control

// This is a part of the GWC Library
// Copyright (C) 2001-2002 Aircom software
// All rights reserved.
//
// This source code can be used, distributed or modified
// free of charge only if this header copyright is not removed.
// In other cases, contact us at:
// web:   http://www.aircom.org
// email: info@aircom.org
//

#ifndef __GWCCOLORCOMPONENTEDITCTRL_H
#define __GWCCOLORCOMPONENTEDITCTRL_H

#include "GWCCCELink.h"

// Use this as the classname when inserting this control as a custom control
// in the MSVC++ dialog editor
#define COLORCOMPEDITCTRL_CLASSNAME    _T("ColorCompEditCtrl")  // Window class name

extern UINT WM_GWCCOLORCOMPEDIT_CHANGED;

class GWCColorComponentSet;
class GWCGradientColorWnd;

class GWCCCECTRL_LINKAGE GWCColorComponentEditCtrl : public CWnd
{
	// Constants
	public:
		typedef enum { RED, GREEN, BLUE, HUE, SAT, LIGHT };

	// Construction
	public:
		GWCColorComponentEditCtrl();
		virtual ~GWCColorComponentEditCtrl();

	// Attributes
	protected:
		// The central edit control of this window. Allows the user to edit manually the
		// component value.
		CEdit m_edit;

		// A utility spin control to change the value shown in the edit control with
		// a click of the mouse.
		CSpinButtonCtrl m_spin;

		// Color of the bar that is displayed just under the edit control.
		COLORREF m_colorBar;

		// True when the left mouse button is pressed on the right button.
		bool m_buttonPushed;

		// Value maintained by this control (0 .. 255)
		unsigned char m_value;

		// Type of this color component. Values are in the enumeration above.
		int m_type;

		// Internal variable used to know if the user typed a new character (false) or if
		// the value is changed by a method call (true).
		bool m_externalEditUpdate;

		// True when a mouse drag is performed on the color bar.
		bool m_dragInProgress;

		// An object that keeps track of all control components of one color, including ourself.
		GWCColorComponentSet* m_ownerSet;

		// Pointer to a static window poped up when clicking on the right button.
		GWCGradientColorWnd* m_gradientChooser;

		// Internal variable used to know if the control gains the focus by clicking
		// on the right button.
		bool m_buttonFocus;

	// Operations
	public:
		BOOL Create(DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID);
		void SetOwnerSet(GWCColorComponentSet* owner);
		GWCColorComponentSet* GetOwnerSet();
		void SetType(int type);
		int GetType();
		void SetColorBar(COLORREF color);
		void SetColorBar(BYTE hue, BYTE sat, BYTE light);
		void SetValue(unsigned char value);
		unsigned char GetValue();
		void OnColorChanged(COLORREF color);
		void OnColorChanged(BYTE hue, BYTE sat, BYTE light);
		CRect GetButtonRect();

	protected:
		BOOL RegisterWindowClass();
		CRect GetColorRect();
		void UpdateEditValue(CString& str);

	// Overrides
		// ClassWizard generated virtual function overrides
		//{{AFX_VIRTUAL(GWCColorComponentEditCtrl)
	protected:
	virtual void PreSubclassWindow();
	virtual BOOL OnCommand(WPARAM wParam, LPARAM lParam);
	//}}AFX_VIRTUAL

	// Generated message map functions
	protected:
	//{{AFX_MSG(GWCColorComponentEditCtrl)
	afx_msg void OnPaint();
	afx_msg BOOL OnEraseBkgnd(CDC* pDC);
	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 void OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar);
	afx_msg void OnKillFocus(CWnd* pNewWnd);
	afx_msg void OnSetFocus(CWnd* pOldWnd);
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

/////////////////////////////////////////////////////////////////////////////

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

#endif // __GWCCOLORCOMPONENTEDITCTRL_H