testcomcalculatordlg.cpp

VisualC高级编程技术精粹.rar

// TestCOMCalculatorDlg.cpp : implementation file
//

#include "stdafx.h"
#include "TestCOMCalculator.h"
#include "TestCOMCalculatorDlg.h"

#include "..\COMCalculator.h"
#include "..\COMCalculator_i.c"
#include "..\ErrorDef.h"

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

LPSTR csIniFile = _T(".\\AB_value.ini");
/////////////////////////////////////////////////////////////////////////////
// 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()

/////////////////////////////////////////////////////////////////////////////
// CTestCOMCalculatorDlg dialog

CTestCOMCalculatorDlg::CTestCOMCalculatorDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CTestCOMCalculatorDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CTestCOMCalculatorDlg)
	m_fResult = 0.0f;
	m_csOperator = _T("");
	m_fA = 0.0f;
	m_fB = 0.0f;
	m_aABvalue.RemoveAll();
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);

	m_pCalculatorObject = NULL;
}

void CTestCOMCalculatorDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CTestCOMCalculatorDlg)
	DDX_Text(pDX, IDC_EDIT_RESULT, m_fResult);
	DDX_CBString(pDX, IDC_COMBO_OPERATOR, m_csOperator);
	DDX_Text(pDX, IDC_EDIT_OP_A, m_fA);
	DDX_Text(pDX, IDC_EDIT_OP_B, m_fB);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CTestCOMCalculatorDlg, CDialog)
	//{{AFX_MSG_MAP(CTestCOMCalculatorDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON_CALCULATE, OnButtonCalculate)
	ON_BN_CLICKED(IDC_BUTTON_RESTORE, OnButtonRestore)
	ON_BN_CLICKED(IDC_BUTTON_QUIT, OnButtonQuit)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTestCOMCalculatorDlg message handlers

BOOL CTestCOMCalculatorDlg::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
	HRESULT hRes = CoInitialize(NULL);

	HRESULT hResult = S_OK;  
	hResult = CoCreateInstance(CLSID_COMCalculatorObject,
		                       NULL,
							   CLSCTX_INPROC,
							   IID_ICOMCalculatorObject,
							   (LPVOID*)&m_pCalculatorObject);
	ASSERT(SUCCEEDED(hResult));

	if(!SUCCEEDED(hResult))
	{
		AfxMessageBox("Could not CoCreateInstance for COMCalculatorObject");
	}

	CComboBox *pWnd=(CComboBox *)GetDlgItem(IDC_COMBO_OPERATOR);
	pWnd->AddString(_T("加"));
	pWnd->AddString(_T("减"));
	pWnd->AddString(_T("乘"));
	pWnd->AddString(_T("除"));
	pWnd->SetCurSel(0);
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

BOOL CTestCOMCalculatorDlg::DestroyWindow() 
{
	if (m_pCalculatorObject)
	{
		m_pCalculatorObject->Release();
	}
	CoUninitialize();

	return CDialog::DestroyWindow();
}

void CTestCOMCalculatorDlg::DisplayError(long ErrorCode)
{
	AfxMessageBox(gErrorMsg[ErrorCode-1]);
}

void CTestCOMCalculatorDlg::OnButtonCalculate() 
{
	// TODO: Add your control notification handler code here
	UpdateData();

	ASSERT( m_pCalculatorObject );
	HRESULT hResult = S_OK;  
	
	// Calculate
	if( m_csOperator == _T("加") )
	{
		hResult = m_pCalculatorObject->Plus( m_fA,m_fB,&m_fResult );
	}
	else if( m_csOperator == _T("减") )
	{
		hResult = m_pCalculatorObject->Minus( m_fA,m_fB,&m_fResult );
	}
	else if( m_csOperator == _T("乘") )
	{
		hResult = m_pCalculatorObject->Multiply(m_fA,m_fB,&m_fResult);
	}
	else  if( m_csOperator == _T("除") )
	{
		hResult = m_pCalculatorObject->Divide( m_fA,m_fB,&m_fResult );
	}
	else
	{
		AfxMessageBox( _T("Please select a kind of operation from ComboBox!") );
		return;
	}
	
	// Show operation result
	if( S_OK == hResult )
	{
		UpdateData( FALSE );
	}
	else
	{
		DisplayError( hResult );
	}

	// Save the values of A and B.
	m_aABvalue.RemoveAll();
	m_aABvalue.Add( ConvertABvalue(m_fA) );
	m_aABvalue.Add( ConvertABvalue(m_fB) );
	WriteABvalueToFile();
}

void CTestCOMCalculatorDlg::OnButtonRestore() 
{
	// TODO: Add your control notification handler code here
	UpdateData();
	ASSERT( m_pCalculatorObject );
	
	HRESULT hResult = S_OK; 
	hResult = m_pCalculatorObject->Restore( csIniFile,&m_fA,&m_fB );

	if( S_OK == hResult )
	{
		UpdateData( FALSE );
	}
	else
	{
		DisplayError( hResult );
	}
}

void CTestCOMCalculatorDlg::WriteABvalueToFile()
{
	CFile file;

	// Open file
    if( !file.Open(csIniFile,CFile::modeReadWrite | CFile::modeCreate | CFile::modeNoTruncate) )
	{
		AfxMessageBox( _T("File open failed!") );
		return ;
	}
	
	file.SeekToEnd();
	
	// Write file
	for ( int i = 0; i < m_aABvalue.GetSize(); i++ )
	{
		CString csABvalue = m_aABvalue.GetAt(i);
		CString csBlankLine = _T("");
		csBlankLine.Format( _T("%s\r\n"), csBlankLine );
		file.Write( LPCTSTR(csABvalue),csABvalue.GetLength() );
		file.Write( LPCTSTR(csBlankLine),csBlankLine.GetLength() );
	}

	// Close file
	file.Close();
}

CString  CTestCOMCalculatorDlg::ConvertABvalue( float fInput )
{
	char buffer[20];
	_gcvt( fInput, 10, buffer );
	
	CString csResult = buffer;

	return csResult;
}

void CTestCOMCalculatorDlg::OnButtonQuit() 
{
	// TODO: Add your control notification handler code here
	CDialog::OnCancel();
}