gprint.cpp

很牛的GUI源码wxWidgets-2.8.0.zip 可在多种平台下运行.

}

//----------------------------------------------------------------------------
// wxGnomePrintSetupDialog
//----------------------------------------------------------------------------

IMPLEMENT_CLASS(wxGnomePrintDialog, wxPrintDialogBase)

wxGnomePrintDialog::wxGnomePrintDialog( wxWindow *parent, wxPrintDialogData *data )
                    : wxPrintDialogBase(parent, wxID_ANY, _("Print"),
                               wxPoint(0, 0), wxSize(600, 600),
                               wxDEFAULT_DIALOG_STYLE |
                               wxTAB_TRAVERSAL)
{
    if (data)
        m_printDialogData = *data;

    Init();
}

wxGnomePrintDialog::wxGnomePrintDialog( wxWindow *parent, wxPrintData *data )
                    : wxPrintDialogBase(parent, wxID_ANY, _("Print"),
                               wxPoint(0, 0), wxSize(600, 600),
                               wxDEFAULT_DIALOG_STYLE |
                               wxTAB_TRAVERSAL)
{
    if (data)
        m_printDialogData = *data;

    Init();
}

void wxGnomePrintDialog::Init()
{
    wxPrintData data = m_printDialogData.GetPrintData();

    wxGnomePrintNativeData *native =
      (wxGnomePrintNativeData*) data.GetNativeData();

    m_widget = gs_lgp->gnome_print_dialog_new( native->GetPrintJob(),
                                       (guchar*)"Print",
                                       GNOME_PRINT_DIALOG_RANGE|GNOME_PRINT_DIALOG_COPIES );

    int flag = 0;
    if (m_printDialogData.GetEnableSelection())
        flag |= GNOME_PRINT_RANGE_SELECTION;
    if (m_printDialogData.GetEnablePageNumbers())
        flag |= GNOME_PRINT_RANGE_ALL|GNOME_PRINT_RANGE_RANGE;

    gs_lgp->gnome_print_dialog_construct_range_page( (GnomePrintDialog*) m_widget,
                                             flag,
                                             m_printDialogData.GetMinPage(),
                                             m_printDialogData.GetMaxPage(),
                                             NULL,
                                             NULL );
}

wxGnomePrintDialog::~wxGnomePrintDialog()
{
    m_widget = NULL;
}

int wxGnomePrintDialog::ShowModal()
{
    // Transfer data from m_printDalogData to dialog here

    int response = gtk_dialog_run (GTK_DIALOG (m_widget));

    if (response == GNOME_PRINT_DIALOG_RESPONSE_CANCEL)
    {
        gtk_widget_destroy(m_widget);
        m_widget = NULL;

        return wxID_CANCEL;
    }

    gint copies = 1;
    gboolean collate = false;
    gs_lgp->gnome_print_dialog_get_copies( (GnomePrintDialog*) m_widget, &copies, &collate );
    m_printDialogData.SetNoCopies( copies );
    m_printDialogData.SetCollate( collate );

    switch (gs_lgp->gnome_print_dialog_get_range( (GnomePrintDialog*) m_widget ))
    {
        case GNOME_PRINT_RANGE_SELECTION:
            m_printDialogData.SetSelection( true );
            break;
        case GNOME_PRINT_RANGE_ALL:
            m_printDialogData.SetAllPages( true );
            m_printDialogData.SetFromPage( 0 );
            m_printDialogData.SetToPage( 9999 );
            break;
        case GNOME_PRINT_RANGE_RANGE:
        default:
            gint start,end;
            gs_lgp->gnome_print_dialog_get_range_page( (GnomePrintDialog*) m_widget, &start, &end );
            m_printDialogData.SetFromPage( start );
            m_printDialogData.SetToPage( end );
            break;
    }

    gtk_widget_destroy(m_widget);
    m_widget = NULL;

    if (response == GNOME_PRINT_DIALOG_RESPONSE_PREVIEW)
        return wxID_PREVIEW;

    return wxID_OK;
}

wxDC *wxGnomePrintDialog::GetPrintDC()
{
    // Later
    return NULL;
}

bool wxGnomePrintDialog::Validate()
{
    return true;
}

bool wxGnomePrintDialog::TransferDataToWindow()
{
    return true;
}

bool wxGnomePrintDialog::TransferDataFromWindow()
{
    return true;
}

//----------------------------------------------------------------------------
// wxGnomePageSetupDialog
//----------------------------------------------------------------------------

IMPLEMENT_CLASS(wxGnomePageSetupDialog, wxPageSetupDialogBase)

wxGnomePageSetupDialog::wxGnomePageSetupDialog( wxWindow *parent,
                            wxPageSetupDialogData* data )
{
    if (data)
        m_pageDialogData = *data;

    wxGnomePrintNativeData *native =
      (wxGnomePrintNativeData*) m_pageDialogData.GetPrintData().GetNativeData();

    // This is required as the page setup dialog
    // calculates wrong values otherwise.
    gs_lgp->gnome_print_config_set( native->GetPrintConfig(),
                            (const guchar*) GNOME_PRINT_KEY_PREFERED_UNIT,
                            (const guchar*) "Pts" );

    m_widget = gtk_dialog_new();

    gtk_window_set_title( GTK_WINDOW(m_widget), wxGTK_CONV( _("Page setup") ) );

    GtkWidget *main = gs_lgp->gnome_paper_selector_new_with_flags( native->GetPrintConfig(),
        GNOME_PAPER_SELECTOR_MARGINS|GNOME_PAPER_SELECTOR_FEED_ORIENTATION );
    gtk_container_set_border_width (GTK_CONTAINER (main), 8);
    gtk_widget_show (main);

    gtk_container_add( GTK_CONTAINER (GTK_DIALOG (m_widget)->vbox), main );

    gtk_dialog_set_has_separator (GTK_DIALOG (m_widget), TRUE);

    gtk_dialog_add_buttons (GTK_DIALOG (m_widget),
                            GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                            GTK_STOCK_OK, GTK_RESPONSE_OK,
                            NULL);

    gtk_dialog_set_default_response (GTK_DIALOG (m_widget),
                            GTK_RESPONSE_OK);
}

wxGnomePageSetupDialog::~wxGnomePageSetupDialog()
{
}

wxPageSetupDialogData& wxGnomePageSetupDialog::GetPageSetupDialogData()
{
    return m_pageDialogData;
}

int wxGnomePageSetupDialog::ShowModal()
{
    wxGnomePrintNativeData *native =
      (wxGnomePrintNativeData*) m_pageDialogData.GetPrintData().GetNativeData();
    GnomePrintConfig *config = native->GetPrintConfig();

    // Transfer data from m_pageDialogData to native dialog

    int ret = gtk_dialog_run( GTK_DIALOG(m_widget) );

    if (ret == GTK_RESPONSE_OK)
    {
        // Transfer data back to m_pageDialogData

        // I don't know how querying the last parameter works
        // I cannot test it as the dialog is currently broken
        // anyways (it only works for points).
        double ml,mr,mt,mb,pw,ph;
        gs_lgp->gnome_print_config_get_length (config,
            (const guchar*) GNOME_PRINT_KEY_PAGE_MARGIN_LEFT, &ml, NULL);
        gs_lgp->gnome_print_config_get_length (config,
            (const guchar*) GNOME_PRINT_KEY_PAGE_MARGIN_RIGHT, &mr, NULL);
        gs_lgp->gnome_print_config_get_length (config,
            (const guchar*) GNOME_PRINT_KEY_PAGE_MARGIN_TOP, &mt, NULL);
        gs_lgp->gnome_print_config_get_length (config,
            (const guchar*) GNOME_PRINT_KEY_PAGE_MARGIN_BOTTOM, &mb, NULL);
        gs_lgp->gnome_print_config_get_length (config,
            (const guchar*) GNOME_PRINT_KEY_PAPER_WIDTH, &pw, NULL);
        gs_lgp->gnome_print_config_get_length (config,
            (const guchar*) GNOME_PRINT_KEY_PAPER_HEIGHT, &ph, NULL);

        // This probably assumes that the user entered the
        // values in Pts. Since that is the only the dialog
        // works right now, we need to fix this later.
        const GnomePrintUnit *mm_unit = gs_lgp->gnome_print_unit_get_by_abbreviation( (const guchar*) "mm" );
        const GnomePrintUnit *pts_unit = gs_lgp->gnome_print_unit_get_by_abbreviation( (const guchar*) "Pts" );
        gs_lgp->gnome_print_convert_distance( &ml, pts_unit, mm_unit );
        gs_lgp->gnome_print_convert_distance( &mr, pts_unit, mm_unit );
        gs_lgp->gnome_print_convert_distance( &mt, pts_unit, mm_unit );
        gs_lgp->gnome_print_convert_distance( &mb, pts_unit, mm_unit );
        gs_lgp->gnome_print_convert_distance( &pw, pts_unit, mm_unit );
        gs_lgp->gnome_print_convert_distance( &ph, pts_unit, mm_unit );

        m_pageDialogData.SetMarginTopLeft( wxPoint( (int)(ml+0.5), (int)(mt+0.5)) );
        m_pageDialogData.SetMarginBottomRight( wxPoint( (int)(mr+0.5), (int)(mb+0.5)) );

        m_pageDialogData.SetPaperSize( wxSize( (int)(pw+0.5), (int)(ph+0.5) ) );

#if 0
        wxPrintf( wxT("paper %d %d, top margin %d\n"),
            m_pageDialogData.GetPaperSize().x,
            m_pageDialogData.GetPaperSize().y,
            m_pageDialogData.GetMarginTopLeft().x );
#endif

        ret = wxID_OK;
    }
    else
    {
        ret = wxID_CANCEL;
    }

    gtk_widget_destroy( m_widget );
    m_widget = NULL;

    return ret;
}

bool wxGnomePageSetupDialog::Validate()
{
    return true;
}

bool wxGnomePageSetupDialog::TransferDataToWindow()
{
    return true;
}

bool wxGnomePageSetupDialog::TransferDataFromWindow()
{
    return true;
}

//----------------------------------------------------------------------------
// wxGnomePrinter
//----------------------------------------------------------------------------

IMPLEMENT_CLASS(wxGnomePrinter, wxPrinterBase)

wxGnomePrinter::wxGnomePrinter( wxPrintDialogData *data ) :
    wxPrinterBase( data )
{
    m_gpc = NULL;
    m_native_preview = false;
}

wxGnomePrinter::~wxGnomePrinter()
{
}

bool wxGnomePrinter::Print(wxWindow *parent, wxPrintout *printout, bool prompt )
{
    if (!printout)
    {
        sm_lastError = wxPRINTER_ERROR;
        return false;
    }

    wxPrintData printdata = GetPrintDialogData().GetPrintData();
    wxGnomePrintNativeData *native =
        (wxGnomePrintNativeData*) printdata.GetNativeData();

    GnomePrintJob *job = gs_lgp->gnome_print_job_new( native->GetPrintConfig() );
    m_gpc = gs_lgp->gnome_print_job_get_context (job);

    // The GnomePrintJob is temporarily stored in the
    // native print data as the native print dialog
    // needs to access it.
    native->SetPrintJob( job );


    printout->SetIsPreview(false);

    if (m_printDialogData.GetMinPage() < 1)
        m_printDialogData.SetMinPage(1);
    if (m_printDialogData.GetMaxPage() < 1)
        m_printDialogData.SetMaxPage(9999);

    wxDC *dc;
    if (prompt)
        dc = PrintDialog( parent );
    else
        dc = new wxGnomePrintDC( this );

    if (m_native_preview)
        printout->SetIsPreview(true);

    if (!dc)
    {
        gs_lgp->gnome_print_job_close( job );
        g_object_unref (job);
        sm_lastError = wxPRINTER_ERROR;
        return false;
    }

    wxSize ScreenPixels = wxGetDisplaySize();
    wxSize ScreenMM = wxGetDisplaySizeMM();

    printout->SetPPIScreen( (int) ((ScreenPixels.GetWidth() * 25.4) / ScreenMM.GetWidth()),
                            (int) ((ScreenPixels.GetHeight() * 25.4) / ScreenMM.GetHeight()) );
    printout->SetPPIPrinter( wxGnomePrintDC::GetResolution(),
                             wxGnomePrintDC::GetResolution() );

    printout->SetDC(dc);

    int w, h;
    dc->GetSize(&w, &h);
    printout->SetPageSizePixels((int)w, (int)h);
    printout->SetPaperRectPixels(wxRect(0, 0, w, h));
    int mw, mh;
    dc->GetSizeMM(&mw, &mh);
    printout->SetPageSizeMM((int)mw, (int)mh);
    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)
    {
        gs_lgp->gnome_print_job_close( job );
        g_object_unref (job);
        sm_lastError = wxPRINTER_ERROR;
        return false;
    }

    printout->OnBeginPrinting();

    int minPageNum = minPage, maxPageNum = maxPage;

    if ( !m_printDialogData.GetAllPages() )
    {
        minPageNum = m_printDialogData.GetFromPage();
        maxPageNum = m_printDialogData.GetToPage();
    }


    int copyCount;
    for ( copyCount = 1;
          copyCount <= m_printDialogData.GetNoCopies();
          copyCount++ )
    {
        if (!printout->OnBeginDocument(minPageNum, maxPageNum))
        {
            wxLogError(_("Could not start printing."));
            sm_lastError = wxPRINTER_ERROR;
            break;
        }

        int pn;
        for ( pn = minPageNum;
              pn <= maxPageNum && printout->HasPage(pn);
              pn++ )
        {
            dc->StartPage();
            printout->OnPrintPage(pn);
            dc->EndPage();
        }

        printout->OnEndDocument();
        printout->OnEndPrinting();