chathistory.h

c++系统开发实例精粹内附的80例源代码 环境:windows2000,c++6.0

//////////////////////////////////////////////////////////////////////
// FileFury
// Copyright (c) 2000 Tenebril Incorporated
// All rights reserved.
//
// This source code is governed by the Tenebril open source
// license (http://www.tenebril.com/developers/opensource/license.html)
//
// For more information on this and other open source applications,
// visit the Tenebril OpenSource page:
//       http://www.tenebril.com/developers/opensource
//
//////////////////////////////////////////////////////////////////////

#ifndef CCHATHISTORY_DEFINE
#define CCHATHISTORY_DEFINE

class CHistoryColors
{
public:
	CHistoryColors();
	~CHistoryColors();

	BOOL Dereference();
	BOOL Reference();
	
	COLORREF Background;
	COLORREF Text;
	CDC *Border;

private:
	int m_nRefCount;
};

class CHistoryStatement
{
public:
	CHistoryStatement * Next();
	CHistoryStatement();
	~CHistoryStatement();

	CString m_cszMessage;
	CString m_cszSpeaker;
	CString m_cszIP;
	int m_nTime, m_nWidth, m_nHeight;
	void *m_pNext;
	CHistoryColors *m_pColors;
};

class CChatHistory : public CWnd
{
public:
	void SetDefaultFont();
	afx_msg void OnLButtonDblClk(UINT nFlags, CPoint point);
	CHistoryStatement * HitTest(POINT pt);
	BOOL AddStatement(LPCTSTR czMessage, LPCTSTR czSpeaker, LPCTSTR czIP, COLORREF crBack, COLORREF crText);
	CChatHistory();
	~CChatHistory();

	BOOL Create(DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID);

	void SetFont(CFont* pFont, BOOL Redraw = TRUE);

	BOOL SetWindowPos(const CWnd* WndInsertAfter, 
		int x, int y, int cx, int cy, 
		UINT Flags);

	void InvalidateRect(LPCRECT Rect, BOOL Erase = TRUE);

	void SetFont(LOGFONT Logfont);

	void MoveWindow( int x, int y, int nWidth, int nHeight, BOOL bRepaint = TRUE );

protected:

	afx_msg void OnDrawItem(int IDCtl, LPDRAWITEMSTRUCT lpDrawItemStruct);
	afx_msg void OnMeasureItem(int IDCtl, LPMEASUREITEMSTRUCT lpMeasureItemStruct);
	afx_msg int OnCompareItem(int IDCtl, LPCOMPAREITEMSTRUCT lpCompareItemStruct);
	afx_msg void OnDeleteItem(int IDCtl, LPDELETEITEMSTRUCT lpDeleteItemStruct);
	afx_msg void OnPaint();
	afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);
	afx_msg BOOL OnEraseBkgnd(CDC* pDC);
	afx_msg void OnVScroll(UINT SBCode, UINT Pos, CScrollBar* ScrollBar);
	afx_msg UINT OnNcHitTest(CPoint point);
	
private:
	BOOL m_bCreated;
	WORD m_wParseStyle;
	CFont *ControlFont;
	bool MySizing;
	CHistoryStatement *StHead;
	int TimeOffset, ScrollPos, EntryHeight, DrawingWidth;
	CScrollBar ScrollBar;
	CFont *HistoryFont;
	
	void ComputeMessageHeight(CHistoryStatement *State, int width);
	int LastEntryTime(LPCTSTR czSpeaker);

	void CreateMemBorders(CDC *DC, CHistoryColors *pColors);

	void AddStatement(LPCTSTR czMessage, LPCTSTR czSpeaker, LPCTSTR czIP,
		CHistoryColors *pColor);
	CHistoryColors *FindColors(COLORREF crBack, COLORREF crText);
	CHistoryColors *CompileColors(COLORREF back, COLORREF text);

	void CalculateEntryHeight();
	int MinBoxWidth(char *message);

	void Render(CDC *DC);
	void RenderStatement(CDC *DC, CRect DrawRect, CHistoryStatement *CurStatement);
	void DrawBmpBorder(CDC *DC, CRect Rect, CHistoryStatement *CurStatement);

	bool ConvertBitmapColors(CDC *Bitmap, CRect PaintingRect, COLORREF DestinationBasis);

	DECLARE_MESSAGE_MAP()
};

#endif