atlscrl.h

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	LRESULT OnScrollPageRight(WORD /*wNotifyCode*/, WORD /*wID*/, HWND /*hWndCtl*/, BOOL& /*bHandled*/)
	{
		ScrollPageRight();
		return 0;
	}
	LRESULT OnScrollAllLeft(WORD /*wNotifyCode*/, WORD /*wID*/, HWND /*hWndCtl*/, BOOL& /*bHandled*/)
	{
		ScrollAllLeft();
		return 0;
	}
	LRESULT OnScrollAllRight(WORD /*wNotifyCode*/, WORD /*wID*/, HWND /*hWndCtl*/, BOOL& /*bHandled*/)
	{
		ScrollAllRight();
		return 0;
	}

// Overrideables
	void DoPaint(CDCHandle /*dc*/)
	{
		// must be implemented in a derived class
		ATLASSERT(FALSE);
	}

// Implementation
	void DoScroll(int nType, int nScrollCode, int& cxyOffset, int cxySizeAll, int cxySizePage, int cxySizeLine)
	{
		T* pT = static_cast<T*>(this);
		RECT rect;
		pT->GetClientRect(&rect);
		int cxyClient = (nType == SB_VERT) ? rect.bottom : rect.right;
		int cxyMax = cxySizeAll - cxyClient;

		if(cxyMax < 0)		// can't scroll, client area is bigger
			return;

		BOOL bUpdate = TRUE;
		int cxyScroll = 0;

		switch(nScrollCode)
		{
		case SB_TOP:		// top or all left
			cxyScroll = cxyOffset;
			cxyOffset = 0;
			break;
		case SB_BOTTOM:		// bottom or all right
			cxyScroll = cxyOffset - cxyMax;
			cxyOffset = cxyMax;
			break;
		case SB_LINEUP:		// line up or line left
			if(cxyOffset >= cxySizeLine)
			{
				cxyScroll = cxySizeLine;
				cxyOffset -= cxySizeLine;
			}
			else
			{
				cxyScroll = cxyOffset;
				cxyOffset = 0;
			}
			break;
		case SB_LINEDOWN:	// line down or line right
			if(cxyOffset < cxyMax - cxySizeLine)
			{
				cxyScroll = -cxySizeLine;
				cxyOffset += cxySizeLine;
			}
			else
			{
				cxyScroll = cxyOffset - cxyMax;
				cxyOffset = cxyMax;
			}
			break;
		case SB_PAGEUP:		// page up or page left
			if(cxyOffset >= cxySizePage)
			{
				cxyScroll = cxySizePage;
				cxyOffset -= cxySizePage;
			}
			else
			{
				cxyScroll = cxyOffset;
				cxyOffset = 0;
			}
			break;
		case SB_PAGEDOWN:	// page down or page right
			if(cxyOffset < cxyMax - cxySizePage)
			{
				cxyScroll = -cxySizePage;
				cxyOffset += cxySizePage;
			}
			else
			{
				cxyScroll = cxyOffset - cxyMax;
				cxyOffset = cxyMax;
			}
			break;
		case SB_THUMBTRACK:
			if(IsNoThumbTracking())
				break;
			// else fall through
		case SB_THUMBPOSITION:
			{
				SCROLLINFO si;
				si.cbSize = sizeof(SCROLLINFO);
				si.fMask = SIF_TRACKPOS;
				if(pT->GetScrollInfo(nType, &si))
				{
					cxyScroll = cxyOffset - si.nTrackPos;
					cxyOffset = si.nTrackPos;
				}
			}
			break;
		case SB_ENDSCROLL:
		default:
			bUpdate = FALSE;
			break;
		}

		if(bUpdate && cxyScroll != 0)
		{
			pT->SetScrollPos(nType, cxyOffset, TRUE);
			if(nType == SB_VERT)
				pT->ScrollWindowEx(0, cxyScroll, m_uScrollFlags);
			else
				pT->ScrollWindowEx(cxyScroll, 0, m_uScrollFlags);
		}
	}
	int CalcLineOrPage(int nVal, int nMax, int nDiv)
	{
		if(nVal == 0)
		{
			nVal = nMax / nDiv;
			if(nVal < 1)
				nVal = 1;
		}
		else if(nVal > nMax)
			nVal = nMax;

		return nVal;
	}
	void GetSystemSettings()
	{
#ifndef SPI_GETWHEELSCROLLLINES
		const UINT SPI_GETWHEELSCROLLLINES = 104;
#endif //!SPI_GETWHEELSCROLLLINES
		::SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0, &m_nWheelLines, 0);

#if !((_WIN32_WINNT >= 0x0400) || (_WIN32_WINDOWS > 0x0400))
		if(m_uMsgMouseWheel != 0)
			m_uMsgMouseWheel = ::RegisterWindowMessage(MSH_MOUSEWHEEL);

		HWND hWndWheel = FindWindow(MSH_WHEELMODULE_CLASS, MSH_WHEELMODULE_TITLE);
		if(::IsWindow(hWndWheel))
		{
			UINT uMsgScrollLines = ::RegisterWindowMessage(MSH_SCROLL_LINES);
			if(uMsgScrollLines != 0)
				m_nWheelLines = ::SendMessage(hWndWheel, uMsgScrollLines, 0, 0L);
		}
#endif //!((_WIN32_WINNT >= 0x0400) || (_WIN32_WINDOWS > 0x0400))
	}
	bool IsScrollingChildren() const
	{
		return (m_dwExtendedStyle & SCRL_SCROLLCHILDREN) != 0;
	}
	bool IsErasingBackground() const
	{
		return (m_dwExtendedStyle & SCRL_ERASEBACKGROUND) != 0;
	}
	bool IsNoThumbTracking() const
	{
		return (m_dwExtendedStyle & SCRL_NOTHUMBTRACKING) != 0;
	}
#if (WINVER >= 0x0500)
	bool IsSmoothScroll() const
	{
		return (m_dwExtendedStyle & SCRL_SMOOTHSCROLL) != 0;
	}
#endif //(WINVER >= 0x0500)
};


/////////////////////////////////////////////////////////////////////////////
// CScrollWindowImpl - Implements a scrollable window

template <class T, class TBase = CWindow, class TWinTraits = CControlWinTraits>
class ATL_NO_VTABLE CScrollWindowImpl : public CWindowImpl<T, TBase, TWinTraits>, public CScrollImpl< T >
{
public:
	BEGIN_MSG_MAP(CScrollImpl< T >)
		MESSAGE_HANDLER(WM_VSCROLL, CScrollImpl< T >::OnVScroll)
		MESSAGE_HANDLER(WM_HSCROLL, CScrollImpl< T >::OnHScroll)
		MESSAGE_HANDLER(WM_MOUSEWHEEL, CScrollImpl< T >::OnMouseWheel)
#if !((_WIN32_WINNT >= 0x0400) || (_WIN32_WINDOWS > 0x0400))
		MESSAGE_HANDLER(m_uMsgMouseWheel, CScrollImpl< T >::OnMouseWheel)
#endif //(_WIN32_WINNT >= 0x0400) || (_WIN32_WINDOWS > 0x0400)
		MESSAGE_HANDLER(WM_SETTINGCHANGE, CScrollImpl< T >::OnSettingChange)
		MESSAGE_HANDLER(WM_SIZE, CScrollImpl< T >::OnSize)
		MESSAGE_HANDLER(WM_PAINT, CScrollImpl< T >::OnPaint)
		MESSAGE_HANDLER(WM_PRINTCLIENT, CScrollImpl< T >::OnPaint)
	ALT_MSG_MAP(1)
		COMMAND_ID_HANDLER(ID_SCROLL_UP, CScrollImpl< T >::OnScrollUp)
		COMMAND_ID_HANDLER(ID_SCROLL_DOWN, CScrollImpl< T >::OnScrollDown)
		COMMAND_ID_HANDLER(ID_SCROLL_PAGE_UP, CScrollImpl< T >::OnScrollPageUp)
		COMMAND_ID_HANDLER(ID_SCROLL_PAGE_DOWN, CScrollImpl< T >::OnScrollPageDown)
		COMMAND_ID_HANDLER(ID_SCROLL_TOP, CScrollImpl< T >::OnScrollTop)
		COMMAND_ID_HANDLER(ID_SCROLL_BOTTOM, CScrollImpl< T >::OnScrollBottom)
		COMMAND_ID_HANDLER(ID_SCROLL_LEFT, CScrollImpl< T >::OnScrollLeft)
		COMMAND_ID_HANDLER(ID_SCROLL_RIGHT, CScrollImpl< T >::OnScrollRight)
		COMMAND_ID_HANDLER(ID_SCROLL_PAGE_LEFT, CScrollImpl< T >::OnScrollPageLeft)
		COMMAND_ID_HANDLER(ID_SCROLL_PAGE_RIGHT, CScrollImpl< T >::OnScrollPageRight)
		COMMAND_ID_HANDLER(ID_SCROLL_ALL_LEFT, CScrollImpl< T >::OnScrollAllLeft)
		COMMAND_ID_HANDLER(ID_SCROLL_ALL_RIGHT, CScrollImpl< T >::OnScrollAllRight)
	END_MSG_MAP()
};


/////////////////////////////////////////////////////////////////////////////
// CMapScrollImpl - Provides mapping and scrolling support to any window

template <class T>
class CMapScrollImpl : public CScrollImpl< T >
{
public:
	int m_nMapMode;
	RECT m_rectLogAll;
	SIZE m_sizeLogLine;
	SIZE m_sizeLogPage;

// Constructor
	CMapScrollImpl() : m_nMapMode(MM_TEXT)
	{
		::SetRectEmpty(&m_rectLogAll);
		m_sizeLogPage.cx = 0;
		m_sizeLogPage.cy = 0;
		m_sizeLogLine.cx = 0;
		m_sizeLogLine.cy = 0;
	}

// Attributes & Operations
	// mapping mode operations
	void SetScrollMapMode(int nMapMode)
	{
		ATLASSERT(nMapMode >= MM_MIN && nMapMode <= MM_MAX_FIXEDSCALE);
		m_nMapMode = nMapMode;
	}
	int GetScrollMapMode() const
	{
		ATLASSERT(m_nMapMode >= MM_MIN && m_nMapMode <= MM_MAX_FIXEDSCALE);
		return m_nMapMode;
	}

	// offset operations
	void SetScrollOffset(int x, int y, BOOL bRedraw = TRUE)
	{
		ATLASSERT(m_nMapMode >= MM_MIN && m_nMapMode <= MM_MAX_FIXEDSCALE);
		POINT ptOff = { x, y };
		// block: convert logical to device units
		{
			CWindowDC dc(NULL);
			dc.SetMapMode(m_nMapMode);
			dc.LPtoDP(&ptOff);
		}
		CScrollImpl< T >::SetScrollOffset(ptOff, bRedraw);
	}
	void SetScrollOffset(POINT ptOffset, BOOL bRedraw = TRUE)
	{
		SetScrollOffset(ptOffset.x, ptOffset.y, bRedraw);
	}
	void GetScrollOffset(POINT& ptOffset) const
	{
		ATLASSERT(m_nMapMode >= MM_MIN && m_nMapMode <= MM_MAX_FIXEDSCALE);
		ptOffset = m_ptOffset;
		// block: convert logical to device units
		{
			CWindowDC dc(NULL);
			dc.SetMapMode(m_nMapMode);
			dc.DPtoLP(&ptOffset);
		}
	}

	// size operations
	void SetScrollSize(int xMin, int yMin, int xMax, int yMax, BOOL bRedraw = TRUE)
	{
		ATLASSERT(xMax > xMin && yMax > yMin);
		ATLASSERT(m_nMapMode >= MM_MIN && m_nMapMode <= MM_MAX_FIXEDSCALE);

		::SetRect(&m_rectLogAll, xMin, yMax, xMax, yMin);

		SIZE sizeAll;
		sizeAll.cx = xMax - xMin + 1;
		sizeAll.cy = yMax - xMin + 1;
		// block: convert logical to device units
		{
			CWindowDC dc(NULL);
			dc.SetMapMode(m_nMapMode);
			dc.LPtoDP(&sizeAll);
		}
		CScrollImpl< T >::SetScrollSize(sizeAll, bRedraw);
		SetScrollLine(0, 0);
		SetScrollPage(0, 0);
	}
	void SetScrollSize(RECT& rcScroll, BOOL bRedraw = TRUE)
	{
		SetScrollSize(rcScroll.left, rcScroll.top, rcScroll.right, rcScroll.bottom, bRedraw);
	}
	void SetScrollSize(int cx, int cy, BOOL bRedraw = TRUE)
	{
		SetScrollSize(0, 0, cx, cy, bRedraw);
	}
	void SetScrollSize(SIZE size, BOOL bRedraw = NULL)
	{
		SetScrollSize(0, 0, size.cx, size.cy, bRedraw);
	}
	void GetScrollSize(RECT& rcScroll) const
	{
		ATLASSERT(m_nMapMode >= MM_MIN && m_nMapMode <= MM_MAX_FIXEDSCALE);
		rcScroll = m_rectLogAll;
	}

	// line operations
	void SetScrollLine(int cxLine, int cyLine)
	{
		ATLASSERT(cxLine >= 0 && cyLine >= 0);
		ATLASSERT(m_nMapMode >= MM_MIN && m_nMapMode <= MM_MAX_FIXEDSCALE);

		m_sizeLogLine.cx = cxLine;
		m_sizeLogLine.cy = cyLine;
		SIZE sizeLine = m_sizeLogLine;
		// block: convert logical to device units
		{
			CWindowDC dc(NULL);
			dc.SetMapMode(m_nMapMode);
			dc.LPtoDP(&sizeLine);
		}
		CScrollImpl< T >::SetScrollLine(sizeLine);
	}
	void SetScrollLine(SIZE sizeLine)
	{
		SetScrollLine(sizeLine.cx, sizeLine.cy);
	}
	void GetScrollLine(SIZE& sizeLine) const
	{
		ATLASSERT(m_nMapMode >= MM_MIN && m_nMapMode <= MM_MAX_FIXEDSCALE);
		sizeLine = m_sizeLogLine;
	}

	// page operations
	void SetScrollPage(int cxPage, int cyPage)
	{
		ATLASSERT(cxPage >= 0 && cyPage >= 0);
		ATLASSERT(m_nMapMode >= MM_MIN && m_nMapMode <= MM_MAX_FIXEDSCALE);

		m_sizeLogPage.cx = cxPage;
		m_sizeLogPage.cy = cyPage;
		SIZE sizePage = m_sizeLogPage;
		// block: convert logical to device units
		{
			CWindowDC dc(NULL);
			dc.SetMapMode(m_nMapMode);
			dc.LPtoDP(&sizePage);
		}
		CScrollImpl< T >::SetScrollPage(sizePage);
	}
	void SetScrollPage(SIZE sizePage)
	{
		SetScrollPage(sizePage.cx, sizePage.cy);
	}
	void GetScrollPage(SIZE& sizePage) const
	{
		ATLASSERT(m_nMapMode >= MM_MIN && m_nMapMode <= MM_MAX_FIXEDSCALE);
		sizePage = m_sizeLogPage;
	}

	BEGIN_MSG_MAP(CMapScrollImpl< T >)
		MESSAGE_HANDLER(WM_VSCROLL, CScrollImpl< T >::OnVScroll)
		MESSAGE_HANDLER(WM_HSCROLL, CScrollImpl< T >::OnHScroll)
		MESSAGE_HANDLER(WM_MOUSEWHEEL, CScrollImpl< T >::OnMouseWheel)
#if !((_WIN32_WINNT >= 0x0400) || (_WIN32_WINDOWS > 0x0400))
		MESSAGE_HANDLER(m_uMsgMouseWheel, CScrollImpl< T >::OnMouseWheel)
#endif //(_WIN32_WINNT >= 0x0400) || (_WIN32_WINDOWS > 0x0400)
		MESSAGE_HANDLER(WM_SETTINGCHANGE, CScrollImpl< T >::OnSettingChange)
		MESSAGE_HANDLER(WM_SIZE, CScrollImpl< T >::OnSize)
		MESSAGE_HANDLER(WM_PAINT, OnPaint)
		MESSAGE_HANDLER(WM_PRINTCLIENT, OnPaint)
	ALT_MSG_MAP(1)
		COMMAND_ID_HANDLER(ID_SCROLL_UP, CScrollImpl< T >::OnScrollUp)
		COMMAND_ID_HANDLER(ID_SCROLL_DOWN, CScrollImpl< T >::OnScrollDown)
		COMMAND_ID_HANDLER(ID_SCROLL_PAGE_UP, CScrollImpl< T >::OnScrollPageUp)
		COMMAND_ID_HANDLER(ID_SCROLL_PAGE_DOWN, CScrollImpl< T >::OnScrollPageDown)
		COMMAND_ID_HANDLER(ID_SCROLL_TOP, CScrollImpl< T >::OnScrollTop)
		COMMAND_ID_HANDLER(ID_SCROLL_BOTTOM, CScrollImpl< T >::OnScrollBottom)
		COMMAND_ID_HANDLER(ID_SCROLL_LEFT, CScrollImpl< T >::OnScrollLeft)
		COMMAND_ID_HANDLER(ID_SCROLL_RIGHT, CScrollImpl< T >::OnScrollRight)
		COMMAND_ID_HANDLER(ID_SCROLL_PAGE_LEFT, CScrollImpl< T >::OnScrollPageLeft)
		COMMAND_ID_HANDLER(ID_SCROLL_PAGE_RIGHT, CScrollImpl< T >::OnScrollPageRight)
		COMMAND_ID_HANDLER(ID_SCROLL_ALL_LEFT, CScrollImpl< T >::OnScrollAllLeft)
		COMMAND_ID_HANDLER(ID_SCROLL_ALL_RIGHT, CScrollImpl< T >::OnScrollAllRight)
	END_MSG_MAP()

	LRESULT OnPaint(UINT /*uMsg*/, WPARAM wParam, LPARAM /*lParam*/, BOOL& /*bHandled*/)
	{
		T* pT = static_cast<T*>(this);
		ATLASSERT(::IsWindow(pT->m_hWnd));
		if(wParam != NULL)
		{
			CDCHandle dc = (HDC)wParam;
			dc.SetMapMode(m_nMapMode);
			if(m_nMapMode == MM_TEXT)
				dc.SetViewportOrg(-m_ptOffset.x, -m_ptOffset.y);
			else
				dc.SetViewportOrg(-m_ptOffset.x, -m_ptOffset.y + m_sizeAll.cy);
			dc.SetWindowOrg(m_rectLogAll.left, m_rectLogAll.bottom);
			pT->DoPaint(dc);
		}
		else
		{
			CPaintDC dc(pT->m_hWnd);
			dc.SetMapMode(m_nMapMode);
			if(m_nMapMode == MM_TEXT)
				dc.SetViewportOrg(-m_ptOffset.x, -m_ptOffset.y);
			else
				dc.SetViewportOrg(-m_ptOffset.x, -m_ptOffset.y + m_sizeAll.cy);
			dc.SetWindowOrg(m_rectLogAll.left, m_rectLogAll.bottom);
			pT->DoPaint(dc.m_hDC);
		}
		return 0;
	}
};


/////////////////////////////////////////////////////////////////////////////
// CMapScrollWindowImpl - Implements scrolling window with mapping

template <class T, class TBase = CWindow, class TWinTraits = CControlWinTraits>
class ATL_NO_VTABLE CMapScrollWindowImpl : public CWindowImpl< T, TBase, TWinTraits >, public CMapScrollImpl< T >
{
public:
	BEGIN_MSG_MAP(CMapScrollWindowImpl< T >)
		MESSAGE_HANDLER(WM_VSCROLL, CScrollImpl< T >::OnVScroll)
		MESSAGE_HANDLER(WM_HSCROLL, CScrollImpl< T >::OnHScroll)
		MESSAGE_HANDLER(WM_MOUSEWHEEL, CScrollImpl< T >::OnMouseWheel)
#if !((_WIN32_WINNT >= 0x0400) || (_WIN32_WINDOWS > 0x0400))
		MESSAGE_HANDLER(m_uMsgMouseWheel, CScrollImpl< T >::OnMouseWheel)
#endif //(_WIN32_WINNT >= 0x0400) || (_WIN32_WINDOWS > 0x0400)
		MESSAGE_HANDLER(WM_SETTINGCHANGE, CScrollImpl< T >::OnSettingChange)
		MESSAGE_HANDLER(WM_SIZE, CScrollImpl< T >::OnSize)
		MESSAGE_HANDLER(WM_PAINT, CMapScrollImpl< T >::OnPaint)
		MESSAGE_HANDLER(WM_PRINTCLIENT, CMapScrollImpl< T >::OnPaint)
	ALT_MSG_MAP(1)
		COMMAND_ID_HANDLER(ID_SCROLL_UP, CScrollImpl< T >::OnScrollUp)
		COMMAND_ID_HANDLER(ID_SCROLL_DOWN, CScrollImpl< T >::OnScrollDown)
		COMMAND_ID_HANDLER(ID_SCROLL_PAGE_UP, CScrollImpl< T >::OnScrollPageUp)
		COMMAND_ID_HANDLER(ID_SCROLL_PAGE_DOWN, CScrollImpl< T >::OnScrollPageDown)
		COMMAND_ID_HANDLER(ID_SCROLL_TOP, CScrollImpl< T >::OnScrollTop)
		COMMAND_ID_HANDLER(ID_SCROLL_BOTTOM, CScrollImpl< T >::OnScrollBottom)
		COMMAND_ID_HANDLER(ID_SCROLL_LEFT, CScrollImpl< T >::OnScrollLeft)
		COMMAND_ID_HANDLER(ID_SCROLL_RIGHT, CScrollImpl< T >::OnScrollRight)
		COMMAND_ID_HANDLER(ID_SCROLL_PAGE_LEFT, CScrollImpl< T >::OnScrollPageLeft)
		COMMAND_ID_HANDLER(ID_SCROLL_PAGE_RIGHT, CScrollImpl< T >::OnScrollPageRight)
		COMMAND_ID_HANDLER(ID_SCROLL_ALL_LEFT, CScrollImpl< T >::OnScrollAllLeft)
		COMMAND_ID_HANDLER(ID_SCROLL_ALL_RIGHT, CScrollImpl< T >::OnScrollAllRight)
	END_MSG_MAP()
};


/////////////////////////////////////////////////////////////////////////////
// CFSBWindow - Use as a base instead of CWindow to get flat scroll bar support

#if defined(__ATLCTRLS_H__) && (_WIN32_IE >= 0x0400)

template <class TBase = CWindow> class CFSBWindowT : public TBase, public CFlatScrollBarImpl<CFSBWindowT< TBase > >
{
public:
// Constructors
	CFSBWindowT(HWND hWnd = NULL) : TBase(hWnd)
	{ }

	CFSBWindowT< TBase >& operator=(HWND hWnd)
	{
		m_hWnd = hWnd;
		return *this;
	}

// CWindow overrides that use flat scroll bar API
// (only those methods that are used by scroll window classes)
	int SetScrollPos(int nBar, int nPos, BOOL bRedraw = TRUE)
	{
		ATLASSERT(::IsWindow(m_hWnd));
		return FlatSB_SetScrollPos(nBar, nPos, bRedraw);
	}

	BOOL GetScrollInfo(int nBar, LPSCROLLINFO lpScrollInfo)
	{
		ATLASSERT(::IsWindow(m_hWnd));
		return FlatSB_GetScrollInfo(nBar, lpScrollInfo);
	}

	BOOL SetScrollInfo(int nBar, LPSCROLLINFO lpScrollInfo, BOOL bRedraw = TRUE)
	{
		ATLASSERT(::IsWindow(m_hWnd));
		return FlatSB_SetScrollInfo(nBar, lpScrollInfo, bRedraw);
	}
};

typedef CFSBWindowT<CWindow>	CFSBWindow;

#endif //defined(__ATLCTRLS_H__) && (_WIN32_IE >= 0x0400)

}; //namespace WTL

#endif //__ATLSCRL_H__