calculatordlg.cpp

Visual C++课程设计案例精编--计算器

// CalculatorDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Calculator.h"
#include "CalculatorDlg.h"
#include "math.h"

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

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCalculatorDlg dialog

CCalculatorDlg::CCalculatorDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCalculatorDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CCalculatorDlg)
	m_result = _T("");
	m_isDegree = -1;
	m_sentific = -1;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	m_hAccel = LoadAccelerators(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDD));

	DtoR=1;

	m_coff=0.1;
	m_bCoff=0;

	m_errorState = ErrNone;
	m_bOperandAvail=FALSE;
	m_operator=OpNone;
}

void CCalculatorDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CCalculatorDlg)
	DDX_Text(pDX, IDC_DISPLAY, m_result);
	DDX_Radio(pDX, IDC_DEGREE, m_isDegree);
	DDX_Radio(pDX, IDC_SENTIFIC, m_sentific);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CCalculatorDlg, CDialog)
	//{{AFX_MSG_MAP(CCalculatorDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_COMMAND_RANGE(IDC_0, IDC_9, OnOperandInput)
	ON_BN_CLICKED(IDC_ADD, OnAdd)
	ON_BN_CLICKED(IDC_MINUS, OnMinus)
	ON_BN_CLICKED(IDC_DIVID, OnDivid)
	ON_BN_CLICKED(IDC_MULTIPLY, OnMultiply)
	ON_BN_CLICKED(IDC_EQUAL, OnEqual)
	ON_BN_CLICKED(IDC_SQRT, OnSqrt)
	ON_BN_CLICKED(IDC_SIGN, OnSign)
	ON_BN_CLICKED(IDC_RECIPROCAL, OnReciprocal)
	ON_BN_CLICKED(IDC_POINT, OnPoint)
	ON_BN_CLICKED(IDC_CLEAR, OnClear)
	ON_BN_CLICKED(IDC_LOG, OnLog)
	ON_BN_CLICKED(IDC_LN, OnLn)
	ON_BN_CLICKED(IDC_FACTORIAL, OnFactorial)
	ON_BN_CLICKED(IDC_EXP, OnExp)
	ON_BN_CLICKED(IDC_SENTIFIC, OnSentific)
	ON_BN_CLICKED(IDC_SIN, OnSin)
	ON_BN_CLICKED(IDC_SQUAR, OnSquar)
	ON_BN_CLICKED(IDC_TAN, OnTan)
	ON_BN_CLICKED(IDC_STANDARD, OnStandard)
	ON_BN_CLICKED(IDC_DEGREE, OnDegree)
	ON_BN_CLICKED(IDC_RAD, OnRad)
	ON_BN_CLICKED(IDC_COS, OnCos)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCalculatorDlg message handlers

BOOL CCalculatorDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	GetWindowRect(rcSentific);

	CWnd* m_pMark=GetDlgItem(IDC_DISPLAY);
	ASSERT(m_pMark);
	CRect rect;
	m_pMark->GetWindowRect(rect);

	rcStandard=rcSentific;
	rcStandard.right=rect.right+5;
	m_bIsExpand=0;
	m_sentific=1;
	OnStandard();
	m_result="0.";

	m_isDegree=1;
	UpdateData(FALSE);
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CCalculatorDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CCalculatorDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CCalculatorDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CCalculatorDlg::OnOperandInput(UINT nID)
{
	ASSERT(nID >= IDC_0 && nID <= IDC_9);

	if (m_errorState != ErrNone)
		return;

	if(m_func!=FuncNone)
	{
		m_func=FuncNone;
		Calculate();
	}

	if (!m_bOperandAvail)
		m_operand = 0;

    if(!m_bCoff) 
		m_operand=m_operand*10+(nID-IDC_0);
	else
	{
		m_operand=m_operand+(nID-IDC_0)*m_coff;
		m_coff*=0.1;
	}

	m_bOperandAvail=TRUE;
	UpdateDisplay();
}

void CCalculatorDlg::Calculate()
{
	if (m_errorState != ErrNone)
		return;

	if (m_bOperandAvail)
	{
		if (m_operator == OpNone)
			m_accum = m_operand;
		else if (m_operator == OpMultiply)
			m_accum *= m_operand;
		else if (m_operator == OpDivide)
		{
			if (m_operand == 0)
				m_errorState = ErrDivideByZero;
			else
				m_accum /= m_operand;
		}
		else if (m_operator == OpAdd)
			m_accum += m_operand;
		else if (m_operator == OpSubtract)
			m_accum -= m_operand;
	}

	m_bOperandAvail = FALSE;
	m_bCoff=0;
	m_coff=0.1;
	UpdateDisplay();
}

void CCalculatorDlg::UpdateDisplay()
{
	if (GetSafeHwnd() == NULL)
		return;

	if (m_errorState != ErrNone)
		m_result="除数不能为零";
	else
	{
		float lVal = (m_bOperandAvail) ? m_operand : m_accum;
		m_result.Format(_T("%f"), lVal);
		int i=m_result.GetLength();
		while(m_result.GetAt(i-1)=='0')
		{
			m_result.Delete(i-1,1);
			i-=1;
		}
	}
	UpdateData(FALSE);
}

BOOL CCalculatorDlg::Keyboard(LPCTSTR szButton)
{
	switch (szButton[0])
	{
	case 'c':
	case 'C':
		OnClear();
		break;

	case '/':
		OnDivid();
		break;
	case '+':
		OnAdd();
		break;
	case '-':
		OnMinus();
		break;
	case '*':
		OnMultiply();
		break;
	case '=':
		OnEqual();
		break;

	default:
		if (szButton[0] >= '0' && szButton[0] <= '9')
		{
			if (m_errorState != ErrNone)
		         return FALSE;

	        if (!m_bOperandAvail)
		         m_operand = 0;

	        m_operand=m_operand*10+szButton[0] - '0';
	        m_bOperandAvail=TRUE;
	        UpdateDisplay();
		}
		else
			return FALSE;
		break;
	}
	return TRUE;
}


void CCalculatorDlg::OnAdd() 
{
	// TODO: Add your control notification handler code here
	Calculate();
	m_operator = OpAdd;
}

void CCalculatorDlg::OnMinus() 
{
	// TODO: Add your control notification handler code here
	Calculate();
	m_operator = OpSubtract;
}

void CCalculatorDlg::OnDivid() 
{
	// TODO: Add your control notification handler code here
	Calculate();
	m_operator = OpDivide;
}

void CCalculatorDlg::OnMultiply() 
{
	// TODO: Add your control notification handler code here
	Calculate();
	m_operator = OpMultiply;
}

void CCalculatorDlg::OnEqual() 
{
	// TODO: Add your control notification handler code here
	Calculate();
	m_operator = OpNone;
}

void CCalculatorDlg::OnSign() 
{
	// TODO: Add your control notification handler code here
	m_operand*=-1;
	UpdateDisplay();
}

void CCalculatorDlg::OnSqrt() 
{
	// TODO: Add your control notification handler code here
    m_func=FuncSqrt;
	Run_Func();
}

void CCalculatorDlg::OnReciprocal() 
{
	// TODO: Add your control notification handler code here
    m_func=FuncRec;
	Run_Func();
}

void CCalculatorDlg::OnPoint() 
{
	// TODO: Add your control notification handler code here
	m_bCoff=1;

	UpdateDisplay();
}

void CCalculatorDlg::OnClear() 
{
	// TODO: Add your control notification handler code here
	m_operator = OpNone;
	m_operand = 0;
	m_accum = 0;
	m_bOperandAvail = FALSE;
	m_errorState = ErrNone;
	m_coff=0.1;
	UpdateDisplay();
}

BOOL CCalculatorDlg::PreTranslateMessage(MSG* pMsg)
{
	if (m_hAccel != NULL && TranslateAccelerator(m_hWnd, m_hAccel, pMsg))
		return TRUE;

	return CDialog::PreTranslateMessage(pMsg);
}

void CCalculatorDlg::OnLog() 
{
	// TODO: Add your control notification handler code here
	m_func=FuncLog;
	Run_Func();
}

void CCalculatorDlg::OnLn() 
{
	// TODO: Add your control notification handler code here
	m_func=FuncLn;
	Run_Func();
}

void CCalculatorDlg::OnFactorial() 
{
	// TODO: Add your control notification handler code here
    m_func=FuncN;
	Run_Func();
}

void CCalculatorDlg::OnExp() 
{
	// TODO: Add your control notification handler code here
	m_func=FuncExp;
	Run_Func();
}

void CCalculatorDlg::OnSentific() 
{
	// TODO: Add your control notification handler code here
	m_bIsExpand=1;
	m_sentific=0;
	ExpandToSentific();
}

void CCalculatorDlg::OnSin() 
{
	// TODO: Add your control notification handler code here
	m_func=FuncSin;
	Run_Func();
}

void CCalculatorDlg::OnSquar() 
{
	// TODO: Add your control notification handler code here
    m_func=FuncSqre;
	Run_Func();
}

void CCalculatorDlg::OnTan() 
{
	// TODO: Add your control notification handler code here
	m_func=FuncTan;
	Run_Func();
}

void CCalculatorDlg::OnStandard() 
{
	// TODO: Add your control notification handler code here
	m_bIsExpand=0;
	m_sentific=1;
	ExpandToSentific();
}

void CCalculatorDlg::Run_Func()
{
	if (m_errorState != ErrNone)
		return;

	if (m_bOperandAvail)
	{
		if(m_func==FuncExp)
			m_operand=exp(m_operand);
		if(m_func==FuncLn)
			m_operand=log(m_operand);
		if(m_func==FuncLog)
			m_operand=log10(m_operand);
		if(m_func==FuncSqrt)
			m_operand=sqrt(m_operand);
		if(m_func==FuncSqre)
			m_operand=pow(10,m_operand);
		if(m_func==FuncSin)
			m_operand=sin(m_operand*DtoR);
		if(m_func==FuncCos)
			m_operand=cos(m_operand*DtoR);
		if(m_func==FuncTan)
			m_operand=tan(m_operand*DtoR);
		if(m_func==FuncRec)
			m_operand=1/m_operand;
		if(m_func=FuncN)
		{
			int i;
	        for(i=m_operand-1;i>=1;i--)
		    m_operand*=i;
		}
	}
	UpdateDisplay();

//	m_func=FuncNone;
}

void CCalculatorDlg::OnDegree() 
{
	// TODO: Add your control notification handler code here
	m_isDegree=0;
	DtoR=(2*PI)/360;
	UpdateData(FALSE);
}

void CCalculatorDlg::OnRad() 
{
	// TODO: Add your control notification handler code here
	m_isDegree=1;
	DtoR=1;
	UpdateData(TRUE);
}

void CCalculatorDlg::OnCos() 
{
	// TODO: Add your control notification handler code here
	m_func=FuncCos;
	Run_Func();
}

void CCalculatorDlg::ExpandToSentific()
{
	if(m_bIsExpand)
	{
		SetWindowPos(NULL,0,0,rcSentific.Width(),rcSentific.Height(),
			SWP_NOMOVE|SWP_NOZORDER);
		SetVisibleCtrl();
	}
	else
	{
		SetWindowPos(NULL,0,0,rcStandard.Width(),rcSentific.Height(),
			SWP_NOMOVE|SWP_NOZORDER);
		SetVisibleCtrl();
	}
	UpdateData(FALSE);
}

void CCalculatorDlg::SetVisibleCtrl()
{
	CWnd* pCtrl=GetWindow(GW_CHILD);
	CRect rcTest;
	CRect rcControl;
	CRect rcShow;

	GetWindowRect(rcShow);

	while(pCtrl!=NULL)
	{
		pCtrl->GetWindowRect(rcControl);

		if(rcTest.IntersectRect(rcShow,rcControl))
			pCtrl->EnableWindow(TRUE);
		else
			pCtrl->EnableWindow(FALSE);

		pCtrl=pCtrl->GetWindow(GW_HWNDNEXT);
	}
}