atlsplit.h

一个使用wtl写的完整的多窗口浏览器

		T* pT = static_cast<T*>(this);
		if((HWND)wParam == pT->m_hWnd && LOWORD(lParam) == HTCLIENT)
		{
			DWORD dwPos = ::GetMessagePos();
			POINT ptPos = { GET_X_LPARAM(dwPos), GET_Y_LPARAM(dwPos) };
			pT->ScreenToClient(&ptPos);
			if(IsOverSplitterBar(ptPos.x, ptPos.y))
				return 1;
		}

		bHandled = FALSE;
		return 0;
	}

	LRESULT OnMouseMove(UINT /*uMsg*/, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
	{
		T* pT = static_cast<T*>(this);
		int xPos = GET_X_LPARAM(lParam);
		int yPos = GET_Y_LPARAM(lParam);
		if((wParam & MK_LBUTTON) && ::GetCapture() == pT->m_hWnd)
		{
			int xyNewSplitPos = 0;
			if(t_bVertical)
				xyNewSplitPos = xPos - m_rcSplitter.left - m_cxyDragOffset;
			else
				xyNewSplitPos = yPos - m_rcSplitter.top - m_cxyDragOffset;

			if(xyNewSplitPos == -1)	// avoid -1, that means middle
				xyNewSplitPos = -2;

			if(m_xySplitterPos != xyNewSplitPos)
			{
				if(m_bFullDrag)
				{
					if(pT->SetSplitterPos(xyNewSplitPos, true))
						pT->UpdateWindow();
				}
				else
				{
					DrawGhostBar();
					pT->SetSplitterPos(xyNewSplitPos, false);
					DrawGhostBar();
				}
			}
		}
		else		// not dragging, just set cursor
		{
			if(IsOverSplitterBar(xPos, yPos))
				::SetCursor(m_hCursor);
			bHandled = FALSE;
		}

		return 0;
	}

	LRESULT OnLButtonDown(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM lParam, BOOL& bHandled)
	{
		int xPos = GET_X_LPARAM(lParam);
		int yPos = GET_Y_LPARAM(lParam);
		if(IsOverSplitterBar(xPos, yPos))
		{
			T* pT = static_cast<T*>(this);
			pT->SetCapture();
			::SetCursor(m_hCursor);
			if(!m_bFullDrag)
				DrawGhostBar();
			if(t_bVertical)
				m_cxyDragOffset = xPos - m_rcSplitter.left - m_xySplitterPos;
			else
				m_cxyDragOffset = yPos - m_rcSplitter.top - m_xySplitterPos;
		}
		bHandled = FALSE;
		return 1;
	}

	LRESULT OnLButtonUp(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& bHandled)
	{
		if(!m_bFullDrag)
		{
			DrawGhostBar();
			T* pT = static_cast<T*>(this);
			UpdateSplitterLayout();
			pT->UpdateWindow();
		}
		::ReleaseCapture();
		bHandled = FALSE;
		return 1;
	}

	LRESULT OnLButtonDoubleClick(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
	{
		T* pT = static_cast<T*>(this);
		pT->SetSplitterPos();	// middle
		return 0;
	}

	LRESULT OnSetFocus(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM, BOOL& bHandled)
	{
		if(m_nSinglePane == SPLIT_PANE_NONE)
		{
			if(m_nDefActivePane == SPLIT_PANE_LEFT || m_nDefActivePane == SPLIT_PANE_RIGHT)
				::SetFocus(m_hWndPane[m_nDefActivePane]);
		}
		else
		{
			::SetFocus(m_hWndPane[m_nSinglePane]);
		}
		bHandled = FALSE;
		return 1;
	}

	LRESULT OnMouseActivate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& /*bHandled*/)
	{
		T* pT = static_cast<T*>(this);
		LRESULT lRet = pT->DefWindowProc(uMsg, wParam, lParam);
		if(lRet == MA_ACTIVATE || lRet == MA_ACTIVATEANDEAT)
		{
			DWORD dwPos = ::GetMessagePos();
			POINT pt = { GET_X_LPARAM(dwPos), GET_Y_LPARAM(dwPos) };
			pT->ScreenToClient(&pt);
			RECT rcPane;
			for(int nPane = 0; nPane < m_nPanesCount; nPane++)
			{
				if(GetSplitterPaneRect(nPane, &rcPane) && ::PtInRect(&rcPane, pt))
				{
					m_nDefActivePane = nPane;
					break;
				}
			}
		}
		return lRet;
	}

	LRESULT OnSettingChange(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
	{
		GetSystemSettings(true);
		return 0;
	}

// Implementation - internal helpers
	void UpdateSplitterLayout()
	{
		if(m_nSinglePane == SPLIT_PANE_NONE && m_xySplitterPos == -1)
			return;

		T* pT = static_cast<T*>(this);
		RECT rect = { 0, 0, 0, 0 };
		if(m_nSinglePane == SPLIT_PANE_NONE)
		{
			if(GetSplitterBarRect(&rect))
				pT->InvalidateRect(&rect);

			for(int nPane = 0; nPane < m_nPanesCount; nPane++)
			{
				if(GetSplitterPaneRect(nPane, &rect))
				{
					if(m_hWndPane[nPane] != NULL)
						::SetWindowPos(m_hWndPane[nPane], NULL, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, SWP_NOZORDER);
					else
						pT->InvalidateRect(&rect);
				}
			}
		}
		else
		{
			if(GetSplitterPaneRect(m_nSinglePane, &rect))
			{
				if(m_hWndPane[m_nSinglePane] != NULL)
					::SetWindowPos(m_hWndPane[m_nSinglePane], NULL, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, SWP_NOZORDER);
				else
					pT->InvalidateRect(&rect);
			}
		}
	}

	bool GetSplitterBarRect(LPRECT lpRect) const
	{
		ATLASSERT(lpRect != NULL);
		if(m_nSinglePane != SPLIT_PANE_NONE || m_xySplitterPos == -1)
			return false;

		if(t_bVertical)
		{
			lpRect->left = m_rcSplitter.left + m_xySplitterPos;
			lpRect->top = m_rcSplitter.top;
			lpRect->right = m_rcSplitter.left + m_xySplitterPos + m_cxySplitBar + m_cxyBarEdge;
			lpRect->bottom = m_rcSplitter.bottom;
		}
		else
		{
			lpRect->left = m_rcSplitter.left;
			lpRect->top = m_rcSplitter.top + m_xySplitterPos;
			lpRect->right = m_rcSplitter.right;
			lpRect->bottom = m_rcSplitter.top + m_xySplitterPos + m_cxySplitBar + m_cxyBarEdge;
		}

		return true;
	}
	
	bool GetSplitterPaneRect(int nPane, LPRECT lpRect) const // *****changed*****
	{
		ATLASSERT(nPane == SPLIT_PANE_LEFT || nPane == SPLIT_PANE_RIGHT);
		ATLASSERT(lpRect != NULL);
		bool bRet = true;
		if(m_nSinglePane != SPLIT_PANE_NONE)
		{
			if(nPane == m_nSinglePane)
				*lpRect = m_rcSplitter;
			else
				bRet = false;
		}
		else if(nPane == SPLIT_PANE_LEFT)
		{
			if(t_bVertical)
			{
				lpRect->left = m_rcSplitter.left;
				lpRect->top = m_rcSplitter.top;
				lpRect->right = m_rcSplitter.left + m_xySplitterPos;
				lpRect->bottom = m_rcSplitter.bottom;
			}
			else
			{
				lpRect->left = m_rcSplitter.left;
				lpRect->top = m_rcSplitter.top;
				lpRect->right = m_rcSplitter.right;
				lpRect->bottom = m_rcSplitter.top + m_xySplitterPos;
			}
		}	
		else if(nPane == SPLIT_PANE_RIGHT)
		{
			if(t_bVertical)
			{
				lpRect->left = m_rcSplitter.left + m_xySplitterPos + m_cxySplitBar + m_cxyBarEdge;
				lpRect->top = m_rcSplitter.top;
				lpRect->right = m_rcSplitter.right;
				lpRect->bottom = m_rcSplitter.bottom;
			}
			else
			{
				lpRect->left = m_rcSplitter.left;
				lpRect->top = m_rcSplitter.top + m_xySplitterPos + m_cxySplitBar + m_cxyBarEdge;
				lpRect->right = m_rcSplitter.right;
				lpRect->bottom = m_rcSplitter.bottom;
			}
		}
		else
		{
			bRet = false;
		}
		
		// *****added******
		if (m_hWndPaneParent[nPane] != NULL) {
			const T* pT = static_cast<const T*>(this);
			pT->ClientToScreen(lpRect);
			CWindow wnd(m_hWndPaneParent[nPane]);
			wnd.ScreenToClient(lpRect);
		}
		// ****************
		
		return bRet;
	}

	bool IsOverSplitterRect(int x, int y) const
	{
		// -1 == don't check
		return ((x == -1 || (x >= m_rcSplitter.left && x <= m_rcSplitter.right)) &&
			(y == -1 || (y >= m_rcSplitter.top && y <= m_rcSplitter.bottom)));
	}

	bool IsOverSplitterBar(int x, int y) const
	{
		if(m_nSinglePane != SPLIT_PANE_NONE)
			return false;
		if(m_xySplitterPos == -1 || !IsOverSplitterRect(x, y))
			return false;
		int xy = (t_bVertical) ? x : y;
		int xyOff = (t_bVertical) ? m_rcSplitter.left : m_rcSplitter.top;
		return ((xy >= (xyOff + m_xySplitterPos)) && (xy < xyOff + m_xySplitterPos + m_cxySplitBar + m_cxyBarEdge));
	}

	void DrawGhostBar() // ******changed******
	{
		RECT rect = { 0, 0, 0, 0 };
		if(GetSplitterBarRect(&rect))
		{
			// invert the brush pattern (looks just like frame window sizing)
			T* pT = static_cast<T*>(this);
			CWindowDC dc(NULL);//(pT->m_hWnd); *****changed*****
			CBrush brush = CDCHandle::GetHalftoneBrush();
			if(brush.m_hBrush != NULL)
			{
				pT->ClientToScreen(&rect);// *****added*****
				CBrushHandle brushOld = dc.SelectBrush(brush);
				dc.PatBlt(rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, PATINVERT);
				dc.SelectBrush(brushOld);
			}
		}
	}

	void GetSystemSettings(bool bUpdate)
	{
		m_cxySplitBar = ::GetSystemMetrics(t_bVertical ? SM_CXSIZEFRAME : SM_CYSIZEFRAME);

		T* pT = static_cast<T*>(this);
		if((pT->GetExStyle() & WS_EX_CLIENTEDGE))
		{
			m_cxyBarEdge = 2 * ::GetSystemMetrics(t_bVertical ? SM_CXEDGE : SM_CYEDGE);
			m_cxyMin = 0;
		}
		else
		{
			m_cxyBarEdge = 0;
			m_cxyMin = 2 * ::GetSystemMetrics(t_bVertical ? SM_CXEDGE : SM_CYEDGE);
		}

		::SystemParametersInfo(SPI_GETDRAGFULLWINDOWS, 0, &m_bFullDrag, 0);

		if(bUpdate)
			UpdateSplitterLayout();
	}

	bool IsProportional() const
	{
		return (m_dwExtendedStyle & SPLIT_PROPORTIONAL) != 0;
	}

	void StoreProportionalPos()
	{
		int cxyTotal = t_bVertical ? (m_rcSplitter.right - m_rcSplitter.left) : (m_rcSplitter.bottom - m_rcSplitter.top);
		if(cxyTotal > 0)
			m_nProportionalPos = ::MulDiv(m_xySplitterPos, m_nPropMax, cxyTotal);
		else
			m_nProportionalPos = 0;
	}

	void UpdateProportionalPos()
	{
		int cxyTotal = t_bVertical ? (m_rcSplitter.right - m_rcSplitter.left) : (m_rcSplitter.bottom - m_rcSplitter.top);
		if(cxyTotal > 0)
		{
			int xyNewPos = ::MulDiv(m_nProportionalPos, cxyTotal, m_nPropMax);
			T* pT = static_cast<T*>(this);
			pT->SetSplitterPos(xyNewPos, false);
		}
	}

	bool IsRightAligned() const
	{
		return (m_dwExtendedStyle & SPLIT_RIGHTALIGNED) != 0;
	}

	void StoreRightAlignPos()
	{
		int cxyTotal = t_bVertical ? (m_rcSplitter.right - m_rcSplitter.left) : (m_rcSplitter.bottom - m_rcSplitter.top);
		if(cxyTotal > 0)
			m_nProportionalPos = cxyTotal - m_xySplitterPos;
		else
			m_nProportionalPos = 0;
	}

	void UpdateRightAlignPos()
	{
		int cxyTotal = t_bVertical ? (m_rcSplitter.right - m_rcSplitter.left) : (m_rcSplitter.bottom - m_rcSplitter.top);
		if(cxyTotal > 0)
		{
			T* pT = static_cast<T*>(this);
			pT->SetSplitterPos(cxyTotal - m_nProportionalPos, false);
		}
	}

	bool IsInteractive() const
	{
		return !(m_dwExtendedStyle & SPLIT_NONINTERACTIVE);
	}
};

template <class T, bool t_bVertical> HCURSOR CSplitterImpl< T, t_bVertical>::m_hCursor = NULL;


/////////////////////////////////////////////////////////////////////////////
// CSplitterWindowImpl - Implements a splitter window

template <class T, bool t_bVertical = true, class TBase = CWindow, class TWinTraits = CControlWinTraits>
class ATL_NO_VTABLE CSplitterWindowImpl : public CWindowImpl< T, TBase, TWinTraits >, public CSplitterImpl< T , t_bVertical >
{
public:
	DECLARE_WND_CLASS_EX(NULL, CS_DBLCLKS, COLOR_WINDOW)

	typedef CSplitterWindowImpl< T , t_bVertical, TBase, TWinTraits >	thisClass;
	typedef CSplitterImpl< T , t_bVertical >				baseClass;
	BEGIN_MSG_MAP(thisClass)
		MESSAGE_HANDLER(WM_ERASEBKGND, OnEraseBackground)
		MESSAGE_HANDLER(WM_SIZE, OnSize)
		CHAIN_MSG_MAP(baseClass)
		FORWARD_NOTIFICATIONS()
	END_MSG_MAP()

	LRESULT OnEraseBackground(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
	{
		// handled, no background painting needed
		return 1;
	}

	LRESULT OnSize(UINT /*uMsg*/, WPARAM wParam, LPARAM /*lParam*/, BOOL& bHandled)
	{
		if(wParam != SIZE_MINIMIZED)
			SetSplitterRect();

		bHandled = FALSE;
		return 1;
	}
};


/////////////////////////////////////////////////////////////////////////////
// CSplitterWindow - Implements a splitter window to be used as is

template <bool t_bVertical = true>
class CSplitterWindowT : public CSplitterWindowImpl<CSplitterWindowT<t_bVertical>, t_bVertical>
{
public:
	DECLARE_WND_CLASS_EX(_T("WTL_SplitterWindow"), CS_DBLCLKS, COLOR_WINDOW)
};

typedef CSplitterWindowT<true>	CSplitterWindow;
typedef CSplitterWindowT<false>	CHorSplitterWindow;

}; //namespace WTL

#endif // __ATLSPLIT_H__