计算器dlg.cpp

一个小巧的计算器

// 计算器Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "计算器.h"
#include "计算器Dlg.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()

/////////////////////////////////////////////////////////////////////////////
// CMyDlg dialog

CMyDlg::CMyDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMyDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMyDlg)
	m_edit = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMyDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMyDlg)
	DDX_Text(pDX, IDC_EDIT1, m_edit);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMyDlg, CDialog)
	//{{AFX_MSG_MAP(CMyDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_COMMAND(ID_EXIT, OnExit)
	ON_COMMAND(ID_ABOUT, OnAbout)
	//}}AFX_MSG_MAP
	ON_COMMAND_RANGE(IDC_NUM1,IDC_NUM11,OnNumKey)
	ON_COMMAND_RANGE(IDC_BTN_PLUS,IDC_CLEAR,OnOperatorKey)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMyDlg message handlers

BOOL CMyDlg::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

	//变量初始化
	m_numFirst.Empty();		//清空两个因数
	m_numSecond.Empty();

	is_old = FALSE;

	plus = FALSE;
	dec = FALSE;
	mul = FALSE;
	div = FALSE;
	//加载菜单项
	m_menu.LoadMenu(IDR_MENU);
	SetMenu(&m_menu);
	m_menu.Detach();

	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CMyDlg::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 CMyDlg::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 CMyDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CMyDlg::OnNumKey(UINT nID)
{
	switch(nID)
	{
	case IDC_NUM10:
		if(!is_old)
			m_numFirst += "0";
		else
			m_numSecond += "0";
		break;
	case IDC_NUM1:
		if(!is_old)
			m_numFirst += "1";
		else
			m_numSecond += "1";
		break;
	case IDC_NUM2:
		if(!is_old)
			m_numFirst += "2";
		else
			m_numSecond += "2";
		break;
	case IDC_NUM3:
		if(!is_old)
			m_numFirst += "3";
		else
			m_numSecond += "3";
		break;

		case IDC_NUM4:
		if(!is_old)
			m_numFirst += "4";
		else
			m_numSecond += "4";
		break;
	case IDC_NUM5:
		if(!is_old)
			m_numFirst += "5";
		else
			m_numSecond += "5";
		break;
	case IDC_NUM6:
		if(!is_old)
			m_numFirst += "6";
		else
			m_numSecond += "6";
		break;
	case IDC_NUM7:
		if(!is_old)
			m_numFirst += "7";
		else
			m_numSecond += "7";
		break;
	case IDC_NUM8:
		if(!is_old)
			m_numFirst += "8";
		else
			m_numSecond += "8";
		break;
	case IDC_NUM9:
		if(!is_old)
			m_numFirst += "9";
		else
			m_numSecond += "9";
		break;
	case IDC_NUM11:
		if(!is_old)
			m_numFirst += ".";
		else
			m_numSecond += ".";
		break;
	}
	if(!is_old)
		m_edit = m_numFirst;
	else
		m_edit = m_numSecond;
	
	UpdateData(FALSE);
	return;
}

void CMyDlg::OnOperatorKey(UINT nID)
{
	switch(nID)
	{
	case IDC_BTN_PLUS:
		plus = TRUE;
		m_edit.Empty();
//		m_edit = "";
		is_old = TRUE;
		UpdateData(FALSE);
		break;
		
	case IDC_BTN_DEC:
		dec = TRUE;
		m_edit.Empty();
//		m_edit = "";
		is_old = TRUE;
		UpdateData(FALSE);
		break;

	case IDC_BTN_MUL:
		mul = TRUE;
		m_edit.Empty();
//		m_edit = "";
		is_old = TRUE;
		UpdateData(FALSE);
		break;

	case IDC_BTN_DIV:
		div = TRUE;
		m_edit.Empty();
//		m_edit = "";
		is_old = TRUE;
		UpdateData(FALSE);
		break;
	case IDC_CLEAR:
		if(plus|dec|mul|div)
		{
			m_numSecond.Empty();
			m_edit.Empty();
		}
		else
		{
			m_numFirst.Empty();
			m_edit.Empty();
		}
		UpdateData(FALSE);
		break;
	case IDC_BTN_ENTER:
		double r;
		double a = atof(m_numFirst);
		double b = atof(m_numSecond);
		if(plus)
			r = a + b;
		else if(dec)
			r= a - b;
		else if(mul)
			r = a * b;
		else
			r = a / b;
		CString str;
		str.Format("%2f",r);
		m_edit = str;
		m_numFirst.Empty();
		m_numSecond.Empty();
		UpdateData(FALSE);
		break;
	}
	return;
}

void CMyDlg::OnExit() 
{
	// TODO: Add your command handler code here
	OnOK();
}

void CMyDlg::OnAbout() 
{
	// TODO: Add your command handler code here
	CAboutDlg dlg;
	dlg.DoModal();
}