www.pudn.com > vcppnet2.rar > Ex21aDlg.cpp

// Ex21aDlg.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "Ex21a.h" 
#include "Ex21aDlg.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#endif 
 
 
// CAboutDlg dialog used for App About 
 
class CAboutDlg : public CDialog 
{ 
public: 
	CAboutDlg(); 
 
// Dialog Data 
	enum { IDD = IDD_ABOUTBOX }; 
 
	protected: 
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support 
 
// Implementation 
protected: 
	DECLARE_MESSAGE_MAP() 
}; 
 
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) 
{ 
} 
 
void CAboutDlg::DoDataExchange(CDataExchange* pDX) 
{ 
	CDialog::DoDataExchange(pDX); 
} 
 
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) 
END_MESSAGE_MAP() 
 
 
// CEx21aDlg dialog 
 
 
 
CEx21aDlg::CEx21aDlg(CWnd* pParent /*=NULL*/) 
	: CDialog(CEx21aDlg::IDD, pParent) 
	, m_dLeft(0) 
	, m_nOperation(0) 
{ 
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); 
} 
 
void CEx21aDlg::DoDataExchange(CDataExchange* pDX) 
{ 
	CDialog::DoDataExchange(pDX); 
	DDX_Text(pDX, IDC_LEFT, m_dLeft); 
	DDX_Text(pDX, IDC_RIGHT, m_dRight); 
	DDX_Text(pDX, IDC_RESULT, m_dResult); 
	DDX_Radio(pDX, IDC_OPERATION, m_nOperation); 
} 
 
BEGIN_MESSAGE_MAP(CEx21aDlg, CDialog) 
	ON_WM_SYSCOMMAND() 
	ON_WM_PAINT() 
	ON_WM_QUERYDRAGICON() 
	//}}AFX_MSG_MAP 
	ON_BN_CLICKED(IDC_COMPUTE, OnBnClickedCompute) 
END_MESSAGE_MAP() 
 
 
// CEx21aDlg message handlers 
 
BOOL CEx21aDlg::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 CEx21aDlg::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 CEx21aDlg::OnPaint()  
{ 
	if (IsIconic()) 
	{ 
		CPaintDC dc(this); // device context for painting 
 
		SendMessage(WM_ICONERASEBKGND, reinterpret_cast(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 function to obtain the cursor to display while the user drags 
//  the minimized window. 
HCURSOR CEx21aDlg::OnQueryDragIcon() 
{ 
	return static_cast(m_hIcon); 
} 
 
void CEx21aDlg::OnBnClickedRadio4() 
{ 
	// TODO: Add your control notification handler code here 
} 
 
void CEx21aDlg::OnBnClickedRadio2() 
{ 
	// TODO: Add your control notification handler code here 
} 
 
void CEx21aDlg::OnBnClickedCompute() 
{ 
	UpdateData(TRUE); 
    if(m_nOperation == 0) { 
        m_dResult = m_dLeft + m_dRight; 
    } else if(m_nOperation == 1) { 
        m_dResult = m_dLeft - m_dRight; 
    } else if(m_nOperation == 2) { 
        m_dResult = m_dLeft * m_dRight; 
    } else if(m_nOperation == 3) { 
        if(m_dRight == 0) { 
            AfxMessageBox("Divide by zero"); 
        } else { 
            m_dResult = m_dLeft / m_dRight; 
        } 
    } 
    UpdateData(FALSE); 
 
}