wymeterctl.cpp

一个完备的组态软件源代码

		// 计算 Y 坐标
		dTemp = m_nBottomCY - m_nTopRadius*sin(dAngleRad) ;
		m_pointBoundary[nRef].y = ROUND(dTemp) ;
		nRef++ ;
	}
	nHalfPoints = nRef ;  
	// 增加低边弧上的点

	for (nAngleDeg=nEndAngleDeg; nAngleDeg>=nStartAngleDeg; nAngleDeg-=nAngleIncrementDeg)
	{
		dAngleRad = nAngleDeg*dRadPerDeg ;
		dTemp = m_nBottomCX + m_nBottomRadius*cos(dAngleRad) ;
		m_pointBoundary[nRef].x = ROUND(dTemp) ;
		dTemp = m_nBottomCY - m_nBottomRadius*sin(dAngleRad) ;
		m_pointBoundary[nRef].y = ROUND(dTemp) ;
		nRef++ ;
	}
	
	// 构造仪表表面多边形 
 	for (i=0; i<nRef; i++)
	{
		pointRecess[i].x = m_pointBoundary[i].x ;
		pointRecess[i].y = m_pointBoundary[i].y-1 ;
	}
	pointRecess[0].x = pointRecess[0].x + 1 ;
	pointRecess[nRef-1].x = pointRecess[nRef-1].x - 1 ;
	for (i=nHalfPoints; i<nRef; i++)
	{
		pointRecess[i].x = m_pointBoundary[i].x ;
		pointRecess[i].y = m_pointBoundary[i].y+1 ;
	}
	pointRecess[nHalfPoints].x = pointRecess[nHalfPoints].x - 1 ;
	pointRecess[nRef-1].x = pointRecess[nRef-1].x + 1 ;

	// 建立仪表表面区域
	m_rgnBoundary.DeleteObject() ;
	m_rgnBoundary.CreatePolygonRgn(m_pointBoundary, nRef, ALTERNATE) ;

	// 定位数值输出矩形
	m_rectValue.left = rect.left + 5 ;
	m_rectValue.right = rect.right - 3*rect.Width()/5 ;
	m_rectValue.bottom = rect.bottom - 8*rect.Height()/11 ;
	m_rectValue.top = rect.top +5;

	// 获取有关系统颜色
	m_colorWindow    = GetSysColor(COLOR_WINDOW) ;
	m_colorButton    = GetSysColor(COLOR_BTNFACE) ;
	m_colorShadow    = GetSysColor(COLOR_BTNSHADOW) ;
	m_colorHighlight = GetSysColor(COLOR_BTNHIGHLIGHT) ;
	m_colorText		 = GetSysColor(COLOR_BTNTEXT) ;

	// 用按钮色填充背景
	brushFill.DeleteObject() ;
	brushFill.CreateSolidBrush(m_colorButton) ;
	pBrushOld = pDC->SelectObject(&brushFill) ;
	pDC->Rectangle(rect) ;
	pDC->SelectObject(pBrushOld) ;

	// 绘制仪表凹面.
 	penDraw.DeleteObject() ;
	penDraw.CreatePen(PS_SOLID, 1, m_colorShadow) ;
	pPenOld = pDC->SelectObject(&penDraw) ;
	pDC->MoveTo(pointRecess[0]) ;
	pDC->PolylineTo(pointRecess, nHalfPoints+1) ;
	pDC->SelectObject(pPenOld) ;
 
	// 绘制仪表凹面阴影.
	penDraw.DeleteObject() ;
	penDraw.CreatePen(PS_SOLID, 1, m_colorHighlight) ;
	pPenOld = pDC->SelectObject(&penDraw) ;

	// 绘制低边弧
	pDC->PolylineTo(&pointRecess[nHalfPoints], nHalfPoints) ;
	pDC->LineTo(pointRecess[0]) ;  // connect it to the top
	pDC->SelectObject(pPenOld) ;

	// 绘制仪表表面

	// 使用文本颜色绘制边框
	penDraw.DeleteObject() ;
	penDraw.CreatePen(PS_SOLID, 1, m_colorText) ;
	pPenOld = pDC->SelectObject(&penDraw) ;

	// 使用窗口颜色填充
	brushFill.DeleteObject() ;
	brushFill.CreateSolidBrush(m_colorWindow) ;
	pBrushOld = pDC->SelectObject(&brushFill) ;

	// 绘制表面
	pDC->Polygon(m_pointBoundary, nRef) ;

	// 恢复刷子
	pDC->SelectObject(pBrushOld) ;


	// 绘制刻度记号.
	// 刻度长度比高边下降15%
	dTemp = m_nTopRadius - 0.15*(m_nTopRadius-m_nBottomRadius) ;

	for (nAngleDeg=90; nAngleDeg>nStartAngleDeg; nAngleDeg-=nTickDeg)
	{
		dAngleRad = nAngleDeg*dRadPerDeg ;

		dX = m_nBottomCX + m_nTopRadius*cos(dAngleRad) ;
		dY = m_nBottomCY - m_nTopRadius*sin(dAngleRad) ;
		pDC->MoveTo(ROUND(dX), ROUND(dY)) ;

		dX = m_nBottomCX + dTemp*cos(dAngleRad) ;
		dY = m_nBottomCY - dTemp*sin(dAngleRad) ;
		pDC->LineTo(ROUND(dX), ROUND(dY)) ;
	}

	for (nAngleDeg=90+nTickDeg; nAngleDeg<nEndAngleDeg; nAngleDeg+=nTickDeg)
	{
		dAngleRad = nAngleDeg*dRadPerDeg ;

		dX = m_nBottomCX + m_nTopRadius*cos(dAngleRad) ;
		dY = m_nBottomCY - m_nTopRadius*sin(dAngleRad) ;
		pDC->MoveTo(ROUND(dX), ROUND(dY)) ;

		dX = m_nBottomCX + dTemp*cos(dAngleRad) ;
		dY = m_nBottomCY - dTemp*sin(dAngleRad) ;
		pDC->LineTo(ROUND(dX), ROUND(dY)) ;
	}

	// 恢复画笔
	pDC->SelectObject(pPenOld) ;

	// 绘制数值显示矩形
	penDraw.DeleteObject() ;
	penDraw.CreatePen(PS_SOLID, 1, m_colorShadow) ;
	pPenOld = pDC->SelectObject(&penDraw) ;
	pDC->MoveTo(m_rectValue.left, m_rectValue.bottom) ;
	pDC->LineTo(m_rectValue.left, m_rectValue.top) ;
	pDC->LineTo(m_rectValue.right, m_rectValue.top) ;
	pDC->SelectObject(pPenOld) ;

	penDraw.DeleteObject() ;
	penDraw.CreatePen(PS_SOLID, 1, m_colorHighlight) ;
	pPenOld = pDC->SelectObject(&penDraw) ;
	pDC->LineTo(m_rectValue.right, m_rectValue.bottom) ;
	pDC->LineTo(m_rectValue.left, m_rectValue.bottom) ;
	pDC->SelectObject(pPenOld) ;

	// 计算字体大小
	nHeight = m_rectValue.Height()*85/100 ;
    m_fontValue.DeleteObject() ;
	m_fontValue.CreateFont (nHeight, 0, 0, 0, 400,
												  FALSE, FALSE, 0, ANSI_CHARSET,
												  OUT_DEFAULT_PRECIS, 
												  CLIP_DEFAULT_PRECIS,
												  DEFAULT_QUALITY, 
												  DEFAULT_PITCH|FF_SWISS, "Arial") ;

 	pFontOld = pDC->SelectObject(&m_fontValue) ;
    pDC->GetTextMetrics(&tm) ;
    m_nValueFontHeight = tm.tmHeight ;
    m_nValueFontWidth  = tm.tmAveCharWidth ;

 
 	m_nValueBaseline = m_rectValue.bottom -  m_nValueFontHeight/4 ;
	m_nValueCenter   = m_rectValue.left +    m_rectValue.Width()/2 ;

	// 输出数值
	pDC->SetTextColor(m_colorText) ;
	pDC->SetBkColor(m_colorButton) ;

	// 输出单位
	pDC->SetTextAlign(TA_CENTER|TA_BASELINE) ;
	pDC->TextOut(rect.right - 2*m_nValueFontWidth, 
		         rect.bottom - m_nValueFontHeight/2,
				 m_strUnits) ;

	// 输出最小值
	pDC->SetTextAlign(TA_LEFT|TA_BASELINE) ;
	strTemp.Format("%.*lf", m_nScaleDecimals, m_dMinValue) ;
	pDC->TextOut(rect.left+1,rect.bottom-5,strTemp) ;

	// 输出最大值
	pDC->SetTextAlign(TA_RIGHT|TA_BASELINE) ;
	strTemp.Format("%.*lf", m_nScaleDecimals, m_dMaxValue) ;
	pDC->TextOut((rect.right+m_pointBoundary[0].x)/2, 
				  rect.top+m_nValueFontHeight-3,
							 strTemp) ;

	// 恢复字体和文字背景色
    pDC->SelectObject(pFontOld) ;
	pDC->SetBkColor(m_colorWindow) ;
	
}

//重绘指针
void CwyMeterCtrl::UpdateNeedle(double dValue)
{
	m_dCurrentValue = dValue ;
	InvalidateControl() ;
}
 
// 消息处理
void CwyMeterCtrl::OnDMaxValueChanged() //最大值改变
{
	InvalidateControl();
	SetModifiedFlag();
}

void CwyMeterCtrl::OnDMinValueChanged() //最小值改变 
{
	InvalidateControl();
	SetModifiedFlag();
}

void CwyMeterCtrl::OnDCurrentValueChanged() //当前值改变 
{
	InvalidateControl();
	SetModifiedFlag();
}

void CwyMeterCtrl::OnNScaleDecimalsChanged() //标尺精度改变 
{
	InvalidateControl();
	SetModifiedFlag();
}

void CwyMeterCtrl::OnNValueDecimalsChanged() //数值精度改变 
{
	InvalidateControl();
	SetModifiedFlag();
}

void CwyMeterCtrl::OnColorNeedleChanged() //指针颜色改变 
{
	InvalidateControl();
	SetModifiedFlag();
}

void CwyMeterCtrl::OnStrUnitsChanged()  //数值单位改变
{
	InvalidateControl();
	SetModifiedFlag();
}

//串行化
void CwyMeterCtrl::Serialize(CArchive& ar) 
{
	if (ar.IsStoring())
	{	// 保存
		ar << m_strUnits;
		ar << m_dMaxValue;
		ar << m_dMinValue;
		ar << m_nScaleDecimals;
		ar << m_nValueDecimals;
		ar << m_colorNeedle;
	}
	else
	{	// 读取
		ar >> m_strUnits;
		ar >> m_dMaxValue;
		ar >> m_dMinValue;
		ar >> m_nScaleDecimals;
		ar >> m_nValueDecimals;
		ar >> m_colorNeedle;
		m_dCurrentValue=0.0;
	}
}

//建立窗口时设置定时器
int CwyMeterCtrl::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (COleControl::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	SetTimer (1, 1000, NULL) ; 	
	
	return 0;
}

//关闭窗口时删除定时器
void CwyMeterCtrl::OnDestroy() 
{
	COleControl::OnDestroy();
	
	KillTimer (1) ; 	
	
}

//定时消息处理,用于测试
void CwyMeterCtrl::OnTimer(UINT nIDEvent) 
{
//return;
	static double dStep = 1.5 ;
	static double dValue = 0.0 ;

	dValue += dStep ;
	if (dValue > m_dMaxValue)
	{
		dStep = -fabs(dStep) ;
		dValue = m_dMaxValue-dStep ;
	}
	else if (dValue < m_dMinValue)
	{	
		dStep = fabs(dStep) ;
		dValue = m_dMinValue+dStep ;
	}

	UpdateNeedle(dValue) ;
	
	COleControl::OnTimer(nIDEvent);
}

//设定当前值
void CwyMeterCtrl::SetCurrentValue(double val) 
{
	UpdateNeedle(val) ;//重绘指针
}