www.pudn.com > VC++practise.rar > CalculatorDlg.cpp
// 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_number = 0.0;
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
m_NumberState=1;
}
void CCalculatorDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CCalculatorDlg)
DDX_Text(pDX, IDC_EDIT_PUTOUT, m_number);
//}}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_NUMBER1,IDC_NUMBER0,OnNumberKey)
ON_COMMAND_RANGE(IDC_MINUS,IDC_RESULT,OnOperationKey)
//}}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
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::OnNumberKey(UINT nID)
{
int n=0;
switch(nID)
{
case IDC_NUMBER1:
n=1;
break;
case IDC_NUMBER2:
n=2;
break;
case IDC_NUMBER3:
n=3;
break;
case IDC_NUMBER4:
n=4;
break;
case IDC_NUMBER5:
n=5;
break;
case IDC_NUMBER6:
n=6;
break;
case IDC_NUMBER7:
n=7;
break;
case IDC_NUMBER8:
n=8;
break;
case IDC_NUMBER9:
n=9;
break;
case IDC_NUMBER0:
n=0;
break;
}
if(m_NumberState==1)
{
m_number=m_number*10+n;
m_number1=m_number;
UpdateData(FALSE);
}
else
{
m_number=m_number*10+n;
m_number2=m_number;
UpdateData(FALSE);
}
}
void CCalculatorDlg::OnOperationKey(UINT nID)
{
switch(nID)
{
case IDC_MINUS:
m_number=-m_number;
if(m_NumberState==1)
m_number1=m_number;
else
m_number2=m_number;
UpdateData(FALSE);
break;
case IDC_BACK:
m_number=(int)m_number/10;
if(m_NumberState==1)
m_number1=m_number;
else
m_number2=m_number;
UpdateData(FALSE);
break;
case IDC_DIVIDE:
m_OperationState=1;
m_number=0;
UpdateData(FALSE);
m_NumberState=2;
break;
case IDC_MULTIPLY:
m_OperationState=2;
m_number=0;
UpdateData(FALSE);
m_NumberState=2;
break;
case IDC_ADD:
m_OperationState=3;
m_number=0;
UpdateData(FALSE);
m_NumberState=2;
break;
case IDC_SUBTRACT:
m_OperationState=4;
m_number=0;
UpdateData(FALSE);
m_NumberState=2;
break;
case IDC_CLEAR:
m_number1=m_number2=m_number=0;
m_number=0;
UpdateData(FALSE);
m_NumberState=1;
break;
case IDC_SQRT:
m_number1=m_number=sqrt(m_number1);
UpdateData(FALSE);
break;
case IDC_RECIPROCAL:
m_number1=m_number=(double) 1/m_number1;
UpdateData(FALSE);
break;
case IDC_RESULT:
cal();
break;
}
}
void CCalculatorDlg::cal()
{
switch(m_OperationState)
{
case 1:
m_number=(double)m_number1/m_number2;
m_NumberState=1;
UpdateData(FALSE);
break;
case 2:
m_number=m_number1*m_number2;
m_NumberState=1;
UpdateData(FALSE);
break;
case 3:
m_number=m_number1+m_number2;
m_NumberState=1;
UpdateData(FALSE);
break;
case 4:
m_number=m_number1-m_number2;
m_NumberState=1;
UpdateData(FALSE);
break;
}
m_OperationState=0;
}