helloclientdlg.cpp

用ICE+MFC开发的一个示例程序.以向用户演示ICE的初步应用.

// **********************************************************************
//
// Copyright (c) 2003-2007 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************

#include "stdafx.h"
#include "HelloClient.h"
#include "HelloClientDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

using namespace std;
using namespace Demo;

CHelloClientDlg::CHelloClientDlg(const Ice::CommunicatorPtr& communicator, CWnd* pParent /*=NULL*/) :
    CDialog(CHelloClientDlg::IDD, pParent), _communicator(communicator), _currentMode(0),
    _useSecure(false), _useTimeout(false)
{
    _hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void
CHelloClientDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CHelloClientDlg, CDialog)
    ON_WM_PAINT()
    ON_WM_QUERYDRAGICON()
    //}}AFX_MSG_MAP
    ON_BN_CLICKED(IDC_INVOKE, OnSayHello)
    ON_BN_CLICKED(IDC_FLUSH, OnFlush)
    ON_BN_CLICKED(IDC_SHUTDOWN, OnShutdown)
END_MESSAGE_MAP()

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

    // Set the icon for this dialog.  The framework does this automatically
    // when the application's main window is not a dialog
    SetIcon(_hIcon, TRUE);            // Set big icon
    SetIcon(_hIcon, FALSE);        // Set small icon

    //
    // Retrieve the controls.
    //
    _mode = (CComboBox*)GetDlgItem(IDC_MODE);
    _secure = (CButton*)GetDlgItem(IDC_SECURE);
    _timeout = (CButton*)GetDlgItem(IDC_TIMEOUT);
    _delay = (CButton*)GetDlgItem(IDC_DELAY);
    _status = (CStatic*)GetDlgItem(IDC_STATUSBAR);

    //
    // Use twoway mode as the initial default.
    //
    _mode->SetCurSel(_currentMode);

    //
    // Create the proxy.
    //
    Ice::ObjectPrx obj = _communicator->propertyToProxy("Hello.Proxy");
    _proxy = HelloPrx::uncheckedCast(obj);
    _currentProxy = _proxy;
    _status->SetWindowText(CString(" Ready"));

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

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

        SendMessage(WM_ICONERASEBKGND, reinterpret_cast<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, _hIcon);
    }
    else
    {
        CDialog::OnPaint();
    }
}

// The system calls this function to obtain the cursor to display while the user drags
// the minimized window.
HCURSOR
CHelloClientDlg::OnQueryDragIcon()
{
    return static_cast<HCURSOR>(_hIcon);
}

void
CHelloClientDlg::OnSayHello()
{
    try
    {
        updateProxy();
        _currentProxy->sayHello(_delay->GetCheck() == BST_CHECKED ? 2500 : 0);
        if(_currentProxy->ice_isBatchOneway() || _currentProxy->ice_isBatchDatagram())
        {
            _status->SetWindowText(CString(" Queued batch request"));
        }
        else
        {
            _status->SetWindowText(CString(" Sent request"));
        }
    }
    catch(const IceUtil::Exception& ex)
    {
        handleException(ex);
    }
}

void
CHelloClientDlg::OnFlush()
{
    try
    {
        _communicator->flushBatchRequests();
        _status->SetWindowText(CString(" Flushed batch requests"));
    }
    catch(const IceUtil::Exception& ex)
    {
        handleException(ex);
    }
}

void
CHelloClientDlg::OnShutdown()
{
    try
    {
        updateProxy();
        _currentProxy->shutdown();
        if(_currentProxy->ice_isBatchOneway() || _currentProxy->ice_isBatchDatagram())
        {
            _status->SetWindowText(CString(" Queued shutdown request"));
        }
        else
        {
            _status->SetWindowText(CString(" Sent shutdown request"));
        }
    }
    catch(const IceUtil::Exception& ex)
    {
        handleException(ex);
    }
}

void
CHelloClientDlg::updateProxy()
{
    int mode = _mode->GetCurSel();
    bool secure = _secure->GetCheck() == BST_CHECKED;
    bool timeout = _timeout->GetCheck() == BST_CHECKED;

    if(mode == _currentMode && secure == _useSecure && timeout == _useTimeout)
    {
        return;
    }

    Ice::ObjectPrx proxy;
    switch(mode)
    {
    case 0:
        proxy = _proxy->ice_twoway();
        break;
    case 1:
        proxy = _proxy->ice_oneway();
        break;
    case 2:
        proxy = _proxy->ice_batchOneway();
        break;
    case 3:
        proxy = _proxy->ice_datagram();
        break;
    case 4:
        proxy = _proxy->ice_batchDatagram();
        break;
    default:
        assert(false);
    }
    proxy = proxy->ice_secure(secure);
    if(timeout)
    {
        proxy = proxy->ice_timeout(2000);
    }
    else
    {
        proxy = proxy->ice_timeout(-1);
    }

    if(proxy->ice_isTwoway())
    {
        _currentProxy = HelloPrx::checkedCast(proxy);
    }
    else
    {
        _currentProxy = HelloPrx::uncheckedCast(proxy);
    }
    _currentMode = mode;
    _useSecure = secure;
    _useTimeout = timeout;
}

void
CHelloClientDlg::handleException(const IceUtil::Exception& e)
{
    try
    {
        e.ice_throw();
    }
    catch(const Ice::NoEndpointException&)
    {
        AfxMessageBox(CString("The proxy does not support the current configuration"),
                      MB_OK|MB_ICONEXCLAMATION);
    }
    catch(const IceUtil::Exception& ex)
    {
        ostringstream ostr;
        ostr << ex;
        string s = ostr.str();
        AfxMessageBox(CString(s.c_str()), MB_OK|MB_ICONEXCLAMATION);
    }
    _status->SetWindowText(CString(" Ready"));
}