在打印机上打印图片的程序

// PrintImageDlg.cpp : implementation file // #include "stdafx.h" #include "PrintImage.h" #include "PrintImageDlg.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() ///////////////////////////////////////////////////////////////////////////// // CPrintImageDlg dialog CPrintImageDlg::CPrintImageDlg(CWnd* pParent /*=NULL*/) : CDialog(CPrintImageDlg::IDD, pParent) { //{{AFX_DATA_INIT(CPrintImageDlg) // NOTE: the ClassWizard will add member initialization here //}}AFX_DATA_INIT m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); } void CPrintImageDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CPrintImageDlg) DDX_Control(pDX, IDC_IMAGE, m_image); //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CPrintImageDlg, CDialog) //{{AFX_MSG_MAP(CPrintImageDlg) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_BN_CLICKED(IDC_BUTTONPRINT, OnButtonprint) //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CPrintImageDlg message handlers BOOL CPrintImageDlg::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); } } 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 CPrintImageDlg::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 CPrintImageDlg::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(); } } HCURSOR CPrintImageDlg::OnQueryDragIcon() { return (HCURSOR) m_hIcon; } void CPrintImageDlg::OnOK() { } void CPrintImageDlg::OnButtonprint() { CDC* imagedc = m_image.GetDC(); CRect m_rect; //获取图像的大小 m_image.GetClientRect(m_rect); int formx,formy; formx = imagedc->GetDeviceCaps(LOGPIXELSX); formy = imagedc->GetDeviceCaps(LOGPIXELSY); CPrintDialog m_printdlg (FALSE); if (m_printdlg.DoModal()==IDOK) { CDC dc; dc.Attach(m_printdlg.GetPrinterDC()); //获取打印机与屏幕的分辨率比率 int printerx,printery; printerx = dc.GetDeviceCaps(LOGPIXELSX); printery = dc.GetDeviceCaps(LOGPIXELSY); double ratex,ratey; ratex = (double)printerx/formx; ratey = (double)printery/formy; //打印图像 dc.StartDoc("print"); dc.StretchBlt(30,40,(int)(m_rect.Width()*ratex),(int)(m_rect.Height()*ratey),imagedc,0,0,m_rect.Width(),m_rect.Height(),SRCCOPY); dc.EndDoc(); } }