printmac.cpp

wxWidgets 是一个跨平台的 GUI 框架。它给开发人员提供了统一的接口

{
    UInt32 minPage , maxPage ;
    PMGetPageRange( m_macPrintSettings , &minPage , &maxPage ) ;
    data->SetMinPage( minPage ) ;
    data->SetMaxPage( maxPage ) ;
    UInt32 copies ;
    PMGetCopies( m_macPrintSettings , &copies ) ;
    data->SetNoCopies( copies ) ;
    UInt32 from , to ;
    PMGetFirstPage( m_macPrintSettings , &from ) ;
    PMGetLastPage( m_macPrintSettings , &to ) ;
    if ( to >= 0x7FFFFFFF ) //  due to an OS Bug we don't get back kPMPrintAllPages
    {
        data->SetAllPages( true ) ;
        // This means all pages, more or less
        data->SetFromPage(1);
        data->SetToPage(32000);
    }
    else
    {
        data->SetFromPage( from ) ;
        data->SetToPage( to ) ;
        data->SetAllPages( false );
    }
}

void wxMacCarbonPrintData::TransferFrom( wxPrintDialogData* data )
{
    PMSetPageRange( m_macPrintSettings , data->GetMinPage() , data->GetMaxPage() ) ;
    PMSetCopies( m_macPrintSettings , data->GetNoCopies() , false ) ;
    PMSetFirstPage( m_macPrintSettings , data->GetFromPage() , false ) ;

    if (data->GetAllPages() || data->GetFromPage() == 0)
        PMSetLastPage( m_macPrintSettings , (UInt32) kPMPrintAllPages, true ) ;
    else
        PMSetLastPage( m_macPrintSettings , (UInt32) data->GetToPage() , false ) ;
}

/*
* Printer
*/

wxMacPrinter::wxMacPrinter(wxPrintDialogData *data):
wxPrinterBase(data)
{
}

wxMacPrinter::~wxMacPrinter(void)
{
}

bool wxMacPrinter::Print(wxWindow *parent, wxPrintout *printout, bool prompt)
{
    sm_abortIt = false;
    sm_abortWindow = NULL;

    if (!printout)
        return false;

    printout->SetIsPreview(false);
    if (m_printDialogData.GetMinPage() < 1)
        m_printDialogData.SetMinPage(1);
    if (m_printDialogData.GetMaxPage() < 1)
        m_printDialogData.SetMaxPage(9999);

    // Create a suitable device context
    wxPrinterDC *dc = NULL;
    if (prompt)
    {
        wxMacPrintDialog dialog(parent, & m_printDialogData);
        if (dialog.ShowModal() == wxID_OK)
        {
            dc = wxDynamicCast(dialog.GetPrintDC(), wxPrinterDC);
            wxASSERT(dc);
            m_printDialogData = dialog.GetPrintDialogData();
        }
    }
    else
    {
        dc = new wxPrinterDC( m_printDialogData.GetPrintData() ) ;
    }

    // May have pressed cancel.
    if (!dc || !dc->Ok())
    {
        if (dc)
            delete dc;
        return false;
    }

    // on the mac we have always pixels as addressing mode with 72 dpi
    printout->SetPPIScreen(72, 72);
    PMResolution res;
    wxMacCarbonPrintData* nativeData = (wxMacCarbonPrintData*)
          (m_printDialogData.GetPrintData().GetNativeData());
#if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_5 
    PMPrinter printer;
    PMSessionGetCurrentPrinter(nativeData->m_macPrintSession, &printer);
    PMPrinterGetOutputResolution( printer, nativeData->m_macPrintSettings, &res) ;
#else
    PMGetResolution((PMPageFormat) (nativeData->m_macPageFormat), &res);
#endif
    printout->SetPPIPrinter(int(res.hRes), int(res.vRes));

    // Set printout parameters
    printout->SetDC(dc);

    int w, h;
    dc->GetSize(&w, &h);
    printout->SetPageSizePixels((int)w, (int)h);
    printout->SetPaperRectPixels(dc->GetPaperRect());
    wxCoord mw, mh;
    dc->GetSizeMM(&mw, &mh);
    printout->SetPageSizeMM((int)mw, (int)mh);

    // Create an abort window
    wxBeginBusyCursor();

    printout->OnPreparePrinting();

    // Get some parameters from the printout, if defined
    int fromPage, toPage;
    int minPage, maxPage;
    printout->GetPageInfo(&minPage, &maxPage, &fromPage, &toPage);

    if (maxPage == 0)
    {
        wxEndBusyCursor();
        return false;
    }

    // Only set min and max, because from and to have been
    // set by the user
    m_printDialogData.SetMinPage(minPage);
    m_printDialogData.SetMaxPage(maxPage);

    wxWindow *win = CreateAbortWindow(parent, printout);
    wxSafeYield(win,true);

    if (!win)
    {
        wxEndBusyCursor();
        wxMessageBox(wxT("Sorry, could not create an abort dialog."), wxT("Print Error"), wxOK, parent);
        delete dc;

        return false;
    }

    sm_abortWindow = win;
    sm_abortWindow->Show(true);
    wxSafeYield(win,true);

    printout->OnBeginPrinting();

    bool keepGoing = true;

    int copyCount;
    for (copyCount = 1; copyCount <= m_printDialogData.GetNoCopies(); copyCount ++)
    {
        if (!printout->OnBeginDocument(m_printDialogData.GetFromPage(), m_printDialogData.GetToPage()))
        {
            wxEndBusyCursor();
            wxMessageBox(wxT("Could not start printing."), wxT("Print Error"), wxOK, parent);
            break;
        }
        if (sm_abortIt)
            break;

        int pn;
        for (pn = m_printDialogData.GetFromPage();
        keepGoing && (pn <= m_printDialogData.GetToPage()) && printout->HasPage(pn);
        pn++)
        {
            if (sm_abortIt)
            {
                keepGoing = false;
                break;
            }
            else
            {
#if TARGET_CARBON
                if ( UMAGetSystemVersion() >= 0x1000 )
#endif
                {
#if !wxMAC_USE_CORE_GRAPHICS
                    GrafPtr thePort ;
                    GetPort( &thePort ) ;
#endif
                    wxSafeYield(win,true);
#if !wxMAC_USE_CORE_GRAPHICS
                    SetPort( thePort ) ;
#endif
                }
                dc->StartPage();
                keepGoing = printout->OnPrintPage(pn);
                dc->EndPage();
            }
        }
        printout->OnEndDocument();
    }

    printout->OnEndPrinting();

    if (sm_abortWindow)
    {
        sm_abortWindow->Show(false);
        delete sm_abortWindow;
        sm_abortWindow = NULL;
    }

    wxEndBusyCursor();

    delete dc;

    return true;
}

wxDC* wxMacPrinter::PrintDialog(wxWindow *parent)
{
    wxDC* dc = (wxDC*) NULL;

    wxPrintDialog dialog(parent, & m_printDialogData);
    int ret = dialog.ShowModal();

    if (ret == wxID_OK)
    {
        dc = dialog.GetPrintDC();
        m_printDialogData = dialog.GetPrintDialogData();
    }

    return dc;
}

bool wxMacPrinter::Setup(wxWindow *parent)
{
#if 0
    wxPrintDialog dialog(parent, & m_printDialogData);
    dialog.GetPrintDialogData().SetSetupDialog(true);

    int ret = dialog.ShowModal();

    if (ret == wxID_OK)
        m_printDialogData = dialog.GetPrintDialogData();

    return (ret == wxID_OK);
#endif

    return wxID_CANCEL;
}

/*
* Print preview
*/

wxMacPrintPreview::wxMacPrintPreview(wxPrintout *printout,
                                     wxPrintout *printoutForPrinting,
                                     wxPrintDialogData *data)
                                     : wxPrintPreviewBase(printout, printoutForPrinting, data)
{
    DetermineScaling();
}

wxMacPrintPreview::wxMacPrintPreview(wxPrintout *printout, wxPrintout *printoutForPrinting, wxPrintData *data):
wxPrintPreviewBase(printout, printoutForPrinting, data)
{
    DetermineScaling();
}

wxMacPrintPreview::~wxMacPrintPreview(void)
{
}

bool wxMacPrintPreview::Print(bool interactive)
{
    if (!m_printPrintout)
        return false;

    wxMacPrinter printer(&m_printDialogData);
    return printer.Print(m_previewFrame, m_printPrintout, interactive);
}

void wxMacPrintPreview::DetermineScaling(void)
{
    int screenWidth , screenHeight ;
    wxDisplaySize( &screenWidth , &screenHeight ) ;

    wxSize ppiScreen( 72 , 72 ) ;
    wxSize ppiPrinter( 72 , 72 ) ;
    
    // Note that with Leopard, screen dpi=72 is no longer a given
    m_previewPrintout->SetPPIScreen( ppiScreen.x , ppiScreen.y ) ;
    
    wxCoord w , h ;
    wxCoord ww, hh;
    wxRect paperRect;

    // Get a device context for the currently selected printer
    wxPrinterDC printerDC(m_printDialogData.GetPrintData());
    if (printerDC.Ok())
    {
        printerDC.GetSizeMM(&ww, &hh);
        printerDC.GetSize( &w , &h ) ;
        ppiPrinter = printerDC.GetPPI() ;
        paperRect = printerDC.GetPaperRect();
        m_isOk = true ;
    }
    else
    {
        // use some defaults
        w = 8 * 72 ;
        h = 11 * 72 ;
        ww = (wxCoord) (w * 25.4 / ppiPrinter.x) ;
        hh = (wxCoord) (h * 25.4 / ppiPrinter.y) ;
        paperRect = wxRect(0, 0, w, h);
        m_isOk = false ;
    }
    m_pageWidth = w;
    m_pageHeight = h;
    
    m_previewPrintout->SetPageSizePixels(w , h) ;
    m_previewPrintout->SetPageSizeMM(ww, hh);
    m_previewPrintout->SetPaperRectPixels(paperRect);
    m_previewPrintout->SetPPIPrinter( ppiPrinter.x , ppiPrinter.y ) ;

    m_previewScaleX = float(ppiScreen.x) / ppiPrinter.x;
    m_previewScaleY = float(ppiScreen.y) / ppiPrinter.y;
}

#endif