Analog Meter Class

// AnalogMeterTestView.cpp : implementation of the CAnalogMeterTestView class
//

#include "stdafx.h"
#include <math.h>
#include "AnalogMeterTest.h"
#include "InputString.h"

#include "AnalogMeterTestDoc.h"
#include "AnalogMeterTestView.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAnalogMeterTestView

IMPLEMENT_DYNCREATE(CAnalogMeterTestView, CView)

BEGIN_MESSAGE_MAP(CAnalogMeterTestView, CView)
	//{{AFX_MSG_MAP(CAnalogMeterTestView)
	ON_COMMAND(ID_TIMER_STARTSTOP, OnTimerStartstop)
	ON_WM_TIMER()
	ON_COMMAND(ID_METER_RANGE, OnMeterRange)
	ON_COMMAND(ID_METER_RANGEDECIMALS, OnMeterRangedecimals)
	ON_COMMAND(ID_METER_TITLE, OnMeterTitle)
	ON_COMMAND(ID_METER_VALUEDECIMALS, OnMeterValuedecimals)
	ON_UPDATE_COMMAND_UI(ID_TIMER_STARTSTOP, OnUpdateTimerStartstop)
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CAnalogMeterTestView construction/destruction

CAnalogMeterTestView::CAnalogMeterTestView()
{
	// TODO: add construction code here
	m_lastAngleDeg = 0.0 ;
	m_bTimerRunning = FALSE ;

	m_meterLeft.SetRange (-5.0, 5.0) ;
	m_meterLeft.SetRangeDecimals(1) ;
	m_meterLeft.SetValueDecimals(3) ;
	m_meterLeft.SetTitle("Channel A") ;

	m_meterRight.SetRange (-10.0, 10.0) ;
	m_meterRight.SetRangeDecimals(1) ;
	m_meterRight.SetValueDecimals(3) ;
	m_meterRight.SetTitle("Channel B") ;

}

CAnalogMeterTestView::~CAnalogMeterTestView()
{
}

BOOL CAnalogMeterTestView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CAnalogMeterTestView drawing

void CAnalogMeterTestView::OnDraw(CDC* pDC)
{
	CAnalogMeterTestDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	CRect rectClient ;

	GetClientRect (&rectClient);

	// make two side-by-side rectangles 
	m_rectLeftMeter.left = rectClient.left + rectClient.Width()/10 ;
	m_rectLeftMeter.right = rectClient.left + rectClient.Width()/2 - 5 ;
	m_rectLeftMeter.top = rectClient.top + rectClient.Height()/10 ;
	m_rectLeftMeter.bottom = rectClient.bottom - rectClient.Height()/10 ;
	
	m_rectRightMeter.left = rectClient.left + rectClient.Width()/2 + 5 ;
	m_rectRightMeter.top = m_rectLeftMeter.top ;
	m_rectRightMeter.right = rectClient.right - rectClient.Width()/10 ;
	m_rectRightMeter.bottom = m_rectLeftMeter.bottom ;

	// force them to be square
	if (m_rectLeftMeter.Height() > m_rectLeftMeter.Width())
	{
		m_rectLeftMeter.bottom = m_rectLeftMeter.top + m_rectLeftMeter.Width() ;
		m_rectRightMeter.bottom = m_rectLeftMeter.bottom ;
	}
	else
	{
		m_rectLeftMeter.left = m_rectLeftMeter.right-m_rectLeftMeter.Height() ;
		m_rectRightMeter.right = m_rectRightMeter.left+m_rectLeftMeter.Height() ;
	}

	m_meterLeft.ShowMeter (pDC, m_rectLeftMeter) ;
	m_meterRight.ShowMeter (pDC, m_rectRightMeter) ;

}

/////////////////////////////////////////////////////////////////////////////
// CAnalogMeterTestView printing

BOOL CAnalogMeterTestView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CAnalogMeterTestView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CAnalogMeterTestView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CAnalogMeterTestView diagnostics

#ifdef _DEBUG
void CAnalogMeterTestView::AssertValid() const
{
	CView::AssertValid();
}

void CAnalogMeterTestView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

CAnalogMeterTestDoc* CAnalogMeterTestView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CAnalogMeterTestDoc)));
	return (CAnalogMeterTestDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CAnalogMeterTestView message handlers

/////////////////////////////////////////////////////////////////////////////
void CAnalogMeterTestView::OnTimerStartstop() 
{
	// TODO: Add your command handler code here
	if (m_bTimerRunning)
		KillTimer(1) ;
	else
		SetTimer(1, 10, NULL) ;

	m_bTimerRunning ^= TRUE ;
}

/////////////////////////////////////////////////////////////////////////////
void CAnalogMeterTestView::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
	double mRad, dValue ;
	CClientDC 	dcClient(this) ;

	m_lastAngleDeg += 5.0 ;

	if (m_lastAngleDeg >= 360.0)
		m_lastAngleDeg = 0.0 ;

	mRad = m_lastAngleDeg*3.14159/180.0 ;
	dValue = 5.0*sin(mRad) ;

	m_meterLeft.UpdateNeedle (&dcClient, dValue) ;
	m_meterRight.UpdateNeedle (&dcClient, dValue) ;

	// provided by ClassWizard
	CView::OnTimer(nIDEvent);
}

/////////////////////////////////////////////////////////////////////////////
void CAnalogMeterTestView::OnMeterRange() 
{
	// TODO: Add your command handler code here
	CInputString dlg ;
	CString tempString ;
	double tempUpper, tempLower ;

	tempString.Format("%f", m_meterLeft.GetMaxRange()) ;
	if (dlg.Run ("AnalogMeterTest", "Enter the &upper range limit:", &tempString) == IDOK)
	{
		tempUpper = atof(tempString) ;
		tempString.Format("%f", m_meterLeft.GetMinRange()) ;
		if (dlg.Run ("AnalogMeterTest", "Enter the &lower range limit:", &tempString) == IDOK)
		{
			tempLower = atof(tempString) ;
			if (tempLower == tempUpper)
			{
				if (tempUpper == 0.0)  // if both are zero, make them +/- 10
					tempUpper = 10.0 ;
				if (tempUpper < 0)
					tempUpper = -tempUpper ;
				tempLower = -tempUpper ;
			}
			m_meterLeft.SetRange(tempLower, tempUpper) ;
			
			CClientDC dcClient(this) ;
			m_meterLeft.ShowMeter(&dcClient, m_rectLeftMeter) ;
		}
	}
}

/////////////////////////////////////////////////////////////////////////////
void CAnalogMeterTestView::OnMeterRangedecimals() 
{
	// TODO: Add your command handler code here
	CInputString dlg ;
	CString tempString ;

	tempString.Format("%d", m_meterLeft.GetRangeDecimals()) ;
	if (dlg.Run ("AnalogMeterTest", "Enter the range &decimals:", &tempString) == IDOK)
	{
		m_meterLeft.SetRangeDecimals(atoi(tempString)) ;
			
		CClientDC dcClient(this) ;
		m_meterLeft.ShowMeter(&dcClient, m_rectLeftMeter) ;
	}
		
}

/////////////////////////////////////////////////////////////////////////////
void CAnalogMeterTestView::OnMeterTitle() 
{
	// TODO: Add your command handler code here
	CInputString dlg ;
	CString tempString ;

	tempString = m_meterLeft.GetTitle() ;
	if (dlg.Run ("AnalogMeterTest", "Enter the &title:", &tempString) == IDOK)
	{
		m_meterLeft.SetTitle(tempString) ;
			
		CClientDC dcClient(this) ;
		m_meterLeft.ShowMeter(&dcClient, m_rectLeftMeter) ;
	}
	
}

/////////////////////////////////////////////////////////////////////////////
void CAnalogMeterTestView::OnMeterValuedecimals() 
{
	// TODO: Add your command handler code here
	CInputString dlg ;
	CString tempString ;

	tempString.Format("%d", m_meterLeft.GetValueDecimals()) ;
	if (dlg.Run ("AnalogMeterTest", "Enter the value &decimals:", &tempString) == IDOK)
	{
		m_meterLeft.SetValueDecimals(atoi(tempString)) ;
			
		CClientDC dcClient(this) ;
		m_meterLeft.ShowMeter(&dcClient, m_rectLeftMeter) ;
	}
	
}

/////////////////////////////////////////////////////////////////////////////
void CAnalogMeterTestView::OnUpdateTimerStartstop(CCmdUI* pCmdUI) 
{
	// TODO: Add your command update UI handler code here
	if (m_bTimerRunning)
		pCmdUI->SetCheck(1) ;
	else
		pCmdUI->SetCheck(0) ;
	
}