thermometer.h

工控软件图形界面-控件实现（温度计控件） 可用于工业控制系统开发使用的控件

#ifndef __THERMOMETER_H__
#define __THERMOMETER_H__

#define MAXNAMELENGTH     99

//标示数据位置的滑块
class CScaleUnit 
{
public:
	CScaleUnit();
	~CScaleUnit();

	inline CRect GetRect() const { return m_rectClient; }
	inline void SetRect(const CRect rcClient) { m_rectClient = rcClient; }
	void Draw(CDC *pDC);

private:
	COLORREF   m_BackColor;
	CRect      m_rectClient;	
};

class CThermoMeter : public CStatic
{
public:
	CThermoMeter();
	virtual ~CThermoMeter();

	void SetCurrentValue(const double dCurrentValue);

protected:
	virtual void PreSubclassWindow();
	//}}AFX_VIRTUAL

protected:
	void DrawMeterBackground(CDC *pDC, CRect &rect);
	void DrawScale(CDC *pDC);
	CRect GetUnitRect();
	//{{AFX_MSG(CThermoMeter)
	afx_msg void OnPaint();
	//}}AFX_MSG

	DECLARE_MESSAGE_MAP()

private:
	CRect		 m_rectCtrl;				// 控件区域
	CRect        m_rectScale;               //指针区域

	double		 m_dCurrentValue;
	double		 m_dMinValue;   
	double		 m_dMaxValue;  
	COLORREF     m_BackColor;
    
	CDC			 m_dcMeterPlate;
	CBitmap		 m_bitmapMeterPlate;
	CBitmap		*m_pbitmapOldMeterPlate;

	int			 m_nTicks;						//大格个数
	int			 m_nSubTicks;					//大格中小格个数
	char		 m_strUnits[MAXNAMELENGTH + 1];	//表单位

	CScaleUnit   m_ctrlUnit;
};

#endif