// ==========================================================================
// 					Class Specification : COXGridHeader
// ==========================================================================

// Header file : OXGridHdr.h

// Version: 9.3

// This software along with its related components, documentation and files ("The Libraries")
// is © 1994-2007 The Code Project (1612916 Ontario Limited) and use of The Libraries is
// governed by a software license agreement ("Agreement").  Copies of the Agreement are
// available at The Code Project (www.codeproject.com), as part of the package you downloaded
// to obtain this file, or directly from our office.  For a copy of the license governing
// this software, you may contact us at legalaffairs@codeproject.com, or by calling 416-849-8900.
                         
// //////////////////////////////////////////////////////////////////////////

// Properties:
//	NO	Abstract class (does not have any objects)
//	YES	Derived from CHeaderCtrl

//	YES	Is a Cwnd.                     
//	YES	Two stage creation (constructor & Create())
//	YES	Has a message map
//	NO	Needs a resource (template)

//	NO	Persistent objects (saveable on disk)      
//	NO	Uses exceptions

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

// Desciption :       
//	This class is used to subclass the Header control of a list control (during column resizing)  

// Remark:
//	To prevent the resizing cursor to appear when grid in no resizing mode


// Prerequisites (necessary conditions):

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

#ifndef __OXGRIDHDR_H__
#define __OXGRIDHDR_H__

#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000

#include "OXDllExt.h"
#include "OXUxTheme.h"


class OX_CLASS_DECL COXGridHeader : public CHeaderCtrl
{
friend class COXGridList;

DECLARE_DYNAMIC(COXGridHeader);

// Data members -------------------------------------------------------------
public:

protected:
	COXUxTheme m_UxTheme;
	BOOL m_bResizing;
	int m_nSortCol;
	int m_nSortOrder;

private:
	
// Member functions ---------------------------------------------------------
public:
	COXGridHeader();
	// --- In  :
	// --- Out : 
	// --- Returns :
	// --- Effect : Constructs the object

	BOOL SortColumn(int nCol, int nSortOrder);
	// --- In  :	nCol		-	sorted column
	//				nSortOrder	-	sorting order:
	//					1	-	ascending
	//					-1	-	descending
	//					0	-	no sorting
	// --- Out :	
	// --- Returns:	TRUE if header columns were successfully overdrawn to show 
	//				visual hints on sorted column and sort direction
	// --- Effect : Redraw header control in order to show visual hints on sorted 
	//				column and sort direction

#ifdef _DEBUG
	virtual void AssertValid() const;
	// --- In  :
	// --- Out : 
	// --- Returns :
	// --- Effect : AssertValid performs a validity check on this object 
	//				by checking its internal state. 
	//				In the Debug version of the library, AssertValid may assert and 
	//				thus terminate the program.
	
	virtual void Dump(CDumpContext& dc) const;
	// --- In  : dc : The diagnostic dump context for dumping, usually afxDump.
	// --- Out : 
	// --- Returns :
	// --- Effect : Dumps the contents of the object to a CDumpContext object. 
	//				It provides diagnostic services for yourself and 
	//				 other users of your class. 
	//				Note  The Dump function does not print a newline character
	//				 at the end of its output. 
#endif

	virtual ~COXGridHeader();
	// --- In  :
	// --- Out : 
	// --- Returns :
	// --- Effect : Destructor of the object

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(COXGridHeader)
	//}}AFX_VIRTUAL

protected:
	virtual void  DrawItem( LPDRAWITEMSTRUCT lpDrawItemStruct );

	//{{AFX_MSG(COXGridHeader)
	afx_msg BOOL OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message);
	afx_msg void OnDestroy();
	afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
	afx_msg void OnMouseMove(UINT nFlags, CPoint point);
	//}}AFX_MSG
	afx_msg BOOL OnHdrCtrlNotify(NMHDR* pNMHDR, LRESULT* pResult);
	virtual void PreSubclassWindow();

	DECLARE_MESSAGE_MAP()

private:
	static LRESULT CALLBACK MouseProc(int nCode, WPARAM wParam, LPARAM lParam);
	static HHOOK m_hMouseHook;
	static HWND m_hwndPrevMouseMoveWnd;           
};

#endif // __OXGRIDHDR_H__
// ==========================================================================