safearray-2.zip_SafeArray

// COMDynamicDataClientDlg.cpp : implementation file // // written by Andrew Schafer // feel free to copy as long as you cite my name somewhere #include "stdafx.h" #include "COMDynamicDataClient.h" #include "COMDynamicDataClientDlg.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() ///////////////////////////////////////////////////////////////////////////// // CCOMDynamicDataClientDlg dialog CCOMDynamicDataClientDlg::CCOMDynamicDataClientDlg(CWnd* pParent /*=NULL*/) : CDialog(CCOMDynamicDataClientDlg::IDD, pParent) { //{{AFX_DATA_INIT(CCOMDynamicDataClientDlg) // NOTE: the ClassWizard will add member initialization here //}}AFX_DATA_INIT // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); } void CCOMDynamicDataClientDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CCOMDynamicDataClientDlg) // NOTE: the ClassWizard will add DDX and DDV calls here //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CCOMDynamicDataClientDlg, CDialog) //{{AFX_MSG_MAP(CCOMDynamicDataClientDlg) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_BN_CLICKED(IDC_GETBITMAP_SA, OnGetbitmapSA) ON_BN_CLICKED(IDC_GETBITMAP_D, OnGetbitmapD) //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CCOMDynamicDataClientDlg message handlers BOOL CCOMDynamicDataClientDlg::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 CCOMDynamicDataClientDlg::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 CCOMDynamicDataClientDlg::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 CCOMDynamicDataClientDlg::OnQueryDragIcon() { return (HCURSOR) m_hIcon; } // Get the bitmap using SafeArrays // This is the best way to pass dynamic data void CCOMDynamicDataClientDlg::OnGetbitmapSA() { ICOMDynamicData* pCOMDD = NULL ; HRESULT hr = ::CoCreateInstance(CLSID_COMDynamicData, NULL, CLSCTX_INPROC_SERVER, IID_ICOMDynamicData, (void**)&pCOMDD) ; if (SUCCEEDED(hr)) { LPSAFEARRAY psaBitmapBits; pCOMDD->PassBitmapCopy( &psaBitmapBits ); BITMAP bmp; LPVOID lpArrayData; ::SafeArrayAccessData( psaBitmapBits, &lpArrayData ); // copy the header into our structure ::memcpy( &bmp, lpArrayData, sizeof( BITMAP ) ); long lBmpSize = bmp.bmWidthBytes * bmp.bmHeight; // psaBitmapBits->cbElements also contains the size!!!! // create a buffer to hold the bitmap in LPVOID lpBmpBits = new char[lBmpSize]; ::memcpy( lpBmpBits, (char*)lpArrayData + sizeof( BITMAP ), lBmpSize ); bmp.bmBits = lpBmpBits; ::SafeArrayUnaccessData( psaBitmapBits ); // Get rid of the data ::SafeArrayDestroy( psaBitmapBits ); m_bmpSACheck.DeleteObject(); m_bmpSACheck.CreateBitmapIndirect( &bmp ); // Show our result // but get its size and resize the icon accordingly CStatic* pDlgItem = (CStatic *)GetDlgItem( IDC_BITMAP_SA ); RECT r; pDlgItem->GetWindowRect( &r ); r.right = r.left + bmp.bmWidth; r.bottom = r.top + bmp.bmHeight; ScreenToClient( &r ); pDlgItem->MoveWindow( &r ); pDlgItem->SetBitmap( m_bmpSACheck ); // delete the extra delete[] lpBmpBits; pCOMDD->Release(); } } // This shows how to just get a direct pointer to the data // This only works with INPROC servers. void CCOMDynamicDataClientDlg::OnGetbitmapD() { ICOMDynamicData* pCOMDD = NULL ; HRESULT hr = ::CoCreateInstance(CLSID_COMDynamicData, NULL, CLSCTX_INPROC_SERVER, IID_ICOMDynamicData, (void**)&pCOMDD) ; if (SUCCEEDED(hr)) { BITMAP bmp; pCOMDD->PassBitmapPtr( &bmp ); // that's it, we just got a ptr m_bmpDCheck.DeleteObject(); m_bmpDCheck.CreateBitmapIndirect( &bmp ); // Show our result // but get its size and resize the icon accordingly CStatic* pDlgItem = (CStatic *)GetDlgItem( IDC_BITMAP_D ); RECT r; pDlgItem->GetWindowRect( &r ); r.right = r.left + bmp.bmWidth; r.bottom = r.top + bmp.bmHeight; ScreenToClient( &r ); pDlgItem->MoveWindow( &r ); pDlgItem->SetBitmap( m_bmpDCheck ); pCOMDD->Release(); } }