// rowview.h : interface of the CRowView class
//
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and Microsoft
// QuickHelp and/or WinHelp documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.


// This class implements the behavior of a scrolling view that presents
// multiple rows of fixed-height data.  A row view is similar to an
// owner-draw listbox in its visual behavior; but unlike listboxes,
// a row view has all of the benefits of a view (as well as scroll view),
// including perhaps most importantly printing and print preview.
/////////////////////////////////////////////////////////////////////////////

class CRowView : public CScrollView
{
	DECLARE_DYNAMIC(CRowView)
public:
	CRowView();

// Attributes
protected:
	int m_nRowWidth;            // width of row in current device units
	int m_nRowHeight;           // height of row in current device untis
	int m_nPrevSelectedRow;     // index of the most recently selected row
	int m_nPrevRowCount;        // most recent row count, before update
	int m_nRowsPerPrintedPage;  // how many rows fit on a printed page

// Operations
public:
	virtual void UpdateRow(int nInvalidRow);    // called by derived class's
												// OnUpdate

// Overridables
protected:
	virtual void GetRowWidthHeight(CDC* pDC, int& nRowWidth,
		int& nRowHeight) = 0;
	virtual int GetActiveRow() = 0;
	virtual int GetRowCount() = 0;
	virtual void OnDrawRow(CDC* pDC, int nRow, int y, BOOL bSelected) = 0;
	virtual void ChangeSelectionNextRow(BOOL bNext) = 0;
	virtual void ChangeSelectionToRow(int nRow) = 0;

// Implementation
protected:
	// standard overrides of MFC classes
	void OnInitialUpdate();
	virtual void OnDraw(CDC* pDC);  // overridden to draw this view
	virtual void OnPrepareDC(CDC* pDC, CPrintInfo* pInfo = NULL);
	virtual BOOL OnPreparePrinting(CPrintInfo* pInfo);
	virtual void OnBeginPrinting(CDC* pDC, CPrintInfo* pInfo);
	virtual void OnPrint(CDC* pDC, CPrintInfo* pInfo);

	virtual void CalculateRowMetrics(CDC* pDC)
		{ GetRowWidthHeight(pDC, m_nRowWidth, m_nRowHeight); }
	virtual void UpdateScrollSizes();
	virtual CRect RowToWndRect(CDC* pDC, int nRow);
	virtual int RowToYPos(int nRow);
	virtual void RectLPtoRowRange(const CRect& rectLP,
			int& nFirstRow, int& nLastRow, BOOL bIncludePartiallyShownRows);
	virtual int LastViewableRow();
	virtual ~CRowView();

// Generated message map functions
protected:
	//{{AFX_MSG(CRowView)
	afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);
	afx_msg void OnSize(UINT nType, int cx, int cy);
	afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};
