dcsimg

Numeric edit and numeric spin controls

In my application I needed an edit control which accepts only numeric numbers. In many science applications this is indispensable, but it is actually not implemented in MS-Visual C/C++. It is not difficult to implement this control and I see that some people implemented it. In my own code, some new features were enriched as error messages and range defines, etc.
Note: to use the CNumEdit class properly, the ES_NUMBER, ES_MULTILINE must not be set.

Another control added in my work is CNumSpinCtrl which enables using a spin control as a numeric one which is also not implemented in MFC.

Note: to use the CNumSpinCtrl class properly, the ES_AUTOBUDDY, ES_SETBUDDYINTEGER must not be set.

Your suggestions are appreciated. Enjoy!



class CNumEdit : public CEdit
{
	DECLARE_DYNAMIC(CNumEdit)
public:
	CNumEdit();
	virtual ~CNumEdit();
	enum {VALID = 0x00, OUT_OF_RANGE = 0x01, INVALID_CHAR = 0x02};
	virtual void ChangeAmount(int step);
	virtual float GetDelta();
	virtual void SetDelta(float delta);
	virtual void GetRange(float &min, float &max)const; 
	virtual void SetRange(float min, float max);
	virtual void Verbose(BOOL v);
	virtual BOOL Verbose()const; 
	virtual int IsValid()const; 
	virtual int IsValid(const CString &str)const; 
	virtual BOOL SetValue(float val);
	virtual float GetValue()const; 
protected:
	virtual CString& ConstructFormat(CString &str, float num);
	BYTE m_NumberOfNumberAfterPoint;
	BOOL m_Verbose;
	float m_Delta, m_MinValue, m_MaxValue;
	DECLARE_MESSAGE_MAP()
};

class CNumSpinCtrl : public CSpinButtonCtrl
{
	DECLARE_DYNAMIC(CNumSpinCtrl)
public:
	CNumSpinCtrl();
	virtual ~CNumSpinCtrl();
	virtual void SetDelta(float delta);
	virtual float GetDelta();
	virtual void SetBuddy(CNumEdit *edit);
	virtual CNumEdit* GetBuddy() const;
	virtual void GetRange(float &lower, float& upper ) const;
	virtual void SetRange(float nLower, float nUpper );
	virtual float GetPos();
	virtual void SetPos(float val);
};



Download demo project - 16 KB

Date Last Updated: May 17, 1999



This article was originally published on February 2nd, 1999

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