mfectooltip.h

用C++实现的计算器的源程序

#ifndef _MFECTOOLTIP_H_
#define _MFECTOOLTIP_H_


// default tooltip colors
#define IVORY       RGB(255, 255, 220)
#define BLACK		RGB(0, 0, 0)

// this structure holds all the tooltip information
struct ToolTipInfo : public CObject
{
	UINT			nControlID;		// ID of the control
	UINT			nInfoSize;		// number of lines in the info
	CStringArray	nControlInfo;	// container of the information
	COLORREF		nTextColor;		// text color
	COLORREF		nBackColor;		// background color
};

class CMFECToolTip : public CWnd
{
// Construction
public:
	CMFECToolTip();   // standard constructor
	virtual ~CMFECToolTip();	// destructor

	void		Create(CWnd* pWnd);
	void		ErasePreviousToolTipDisplay( UINT );
	void		ShowToolTip( UINT );		// explicitly shown the tooltip given the control ID

	// NOTE: the user must override the PreTranslateMessage in the calling window in order
	// to handle mousemovent. 
	void		ShowToolTip( CPoint& );		// called only during Mousemovement

	// tooltip functions
	BOOL		AddControlInfo( UINT, CStringArray&, COLORREF back=IVORY, COLORREF text=BLACK );
	BOOL		RemoveControlInfo( UINT );

	// inline functions
	void		SetFontSize( int size ) { m_nFontSize = size; }

// Implementation
protected:
	CWnd*			m_pParentWnd;
	int				m_nHeight;
	int				m_nWidth;
	int				m_nFontSize;

	int				m_nTotalLine;
	int				m_maxCharInLine;   

	virtual void	CalculateInfoBoxRect(UINT nControlID, CRect* pInfoRect);
	virtual void	CalculateHeightAndWidth(CStringArray& straInfos);

private:
	ToolTipInfo*	IsControlIDExisting( UINT );
	void			DisplayInfo( ToolTipInfo* );

private:
	CObArray		m_aControlInfo;
	UINT			m_currentControlID;
};


#endif