gprint.cpp

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

    }

    gs_lgp->gnome_print_job_close( job );
    if (m_native_preview)
    {
        const wxCharBuffer title(wxGTK_CONV_SYS(_("Print preview")));
        GtkWidget *preview = gs_lgp->gnome_print_job_preview_new
                                     (
                                        job,
                                        (const guchar *)title.data()
                                     );
        gtk_widget_show(preview);
    }
    else
    {
        gs_lgp->gnome_print_job_print( job );
    }

    g_object_unref (job);
    delete dc;

    return (sm_lastError == wxPRINTER_NO_ERROR);
}

wxDC* wxGnomePrinter::PrintDialog( wxWindow *parent )
{
    wxGnomePrintDialog dialog( parent, &m_printDialogData );
    int ret = dialog.ShowModal();
    if (ret == wxID_CANCEL)
    {
        sm_lastError = wxPRINTER_CANCELLED;
        return NULL;
    }

    m_native_preview = ret == wxID_PREVIEW;

    m_printDialogData = dialog.GetPrintDialogData();
    return new wxGnomePrintDC( this );
}

bool wxGnomePrinter::Setup( wxWindow *parent )
{
    return false;
}

//-----------------------------------------------------------------------------
// wxGnomePrintDC
//-----------------------------------------------------------------------------

IMPLEMENT_CLASS(wxGnomePrintDC, wxDC)

wxGnomePrintDC::wxGnomePrintDC( wxGnomePrinter *printer )
{
    m_printer = printer;

    m_gpc = printer->GetPrintContext();
    m_job = NULL; // only used and destroyed when created with wxPrintData

    m_layout = gs_lgp->gnome_print_pango_create_layout( m_gpc );
    m_fontdesc = pango_font_description_from_string( "Sans 12" );
    m_context = NULL;

    m_currentRed = 0;
    m_currentBlue = 0;
    m_currentGreen = 0;

    m_signX =  1;  // default x-axis left to right
    m_signY = -1;  // default y-axis bottom up -> top down
    
    GetSize( NULL, &m_deviceOffsetY );
}

wxGnomePrintDC::wxGnomePrintDC( const wxPrintData& data )
{
    m_printer = NULL;
    m_printData = data;

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

    GnomePrintJob *job = gs_lgp->gnome_print_job_new( native->GetPrintConfig() );
    m_gpc = gs_lgp->gnome_print_job_get_context (job);
    m_job = job; // only used and destroyed when created with wxPrintData

    m_layout = gs_lgp->gnome_print_pango_create_layout( m_gpc );
    m_fontdesc = pango_font_description_from_string( "Sans 12" );
    m_context = NULL;

    m_currentRed = 0;
    m_currentBlue = 0;
    m_currentGreen = 0;

    m_signX =  1;  // default x-axis left to right
    m_signY = -1;  // default y-axis bottom up -> top down    
    
    GetSize( NULL, &m_deviceOffsetY );
}

wxGnomePrintDC::~wxGnomePrintDC()
{
    if (m_job)
        g_object_unref (m_job);
}

bool wxGnomePrintDC::IsOk() const
{
    return true;
}

bool wxGnomePrintDC::DoFloodFill(wxCoord x1, wxCoord y1, const wxColour &col, int style )
{
    return false;
}

bool wxGnomePrintDC::DoGetPixel(wxCoord x1, wxCoord y1, wxColour *col) const
{
    return false;
}

void wxGnomePrintDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
{
    if  (m_pen.GetStyle() == wxTRANSPARENT) return;

    SetPen( m_pen );

    gs_lgp->gnome_print_moveto ( m_gpc, XLOG2DEV(x1), YLOG2DEV(y1) );
    gs_lgp->gnome_print_lineto ( m_gpc, XLOG2DEV(x2), YLOG2DEV(y2) );
    gs_lgp->gnome_print_stroke ( m_gpc);

    CalcBoundingBox( x1, y1 );
    CalcBoundingBox( x2, y2 );
}

void wxGnomePrintDC::DoCrossHair(wxCoord x, wxCoord y)
{
}

void wxGnomePrintDC::DoDrawArc(wxCoord x1,wxCoord y1,wxCoord x2,wxCoord y2,wxCoord xc,wxCoord yc)
{
    double dx = x1 - xc;
    double dy = y1 - yc;
    double radius = sqrt((double)(dx*dx+dy*dy));
    double alpha1, alpha2;
    if (x1 == x2 && y1 == y2)
    {
        alpha1 = 0.0;
        alpha2 = 360.0;
    }
    else
    if (radius == 0.0)
    {
        alpha1 = alpha2 = 0.0;
    }
    else
    {
        alpha1 = (x1 - xc == 0) ?
            (y1 - yc < 0) ? 90.0 : -90.0 :
            -atan2(double(y1-yc), double(x1-xc)) * RAD2DEG;
        alpha2 = (x2 - xc == 0) ?
            (y2 - yc < 0) ? 90.0 : -90.0 :
            -atan2(double(y2-yc), double(x2-xc)) * RAD2DEG;

        while (alpha1 <= 0)   alpha1 += 360;
        while (alpha2 <= 0)   alpha2 += 360; // adjust angles to be between
        while (alpha1 > 360)  alpha1 -= 360; // 0 and 360 degree
        while (alpha2 > 360)  alpha2 -= 360;
    }

    if (m_brush.GetStyle() != wxTRANSPARENT)
    {
        SetBrush( m_brush );
        gs_lgp->gnome_print_moveto ( m_gpc, XLOG2DEV(xc), YLOG2DEV(yc) );
        gs_lgp->gnome_print_arcto( m_gpc, XLOG2DEV(xc), YLOG2DEV(yc), XLOG2DEVREL((int)radius), alpha1, alpha2, 0 );

        gs_lgp->gnome_print_fill( m_gpc );
    }

    if (m_pen.GetStyle() != wxTRANSPARENT)
    {
        SetPen (m_pen);
        gs_lgp->gnome_print_newpath( m_gpc );
        gs_lgp->gnome_print_moveto ( m_gpc, XLOG2DEV(xc), YLOG2DEV(yc) );
        gs_lgp->gnome_print_arcto( m_gpc, XLOG2DEV(xc), YLOG2DEV(yc), XLOG2DEVREL((int)radius), alpha1, alpha2, 0 );
        gs_lgp->gnome_print_closepath( m_gpc );

        gs_lgp->gnome_print_stroke( m_gpc );
    }

    CalcBoundingBox (x1, y1);
    CalcBoundingBox (x2, y2);
    CalcBoundingBox (xc, yc);
}

void wxGnomePrintDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
{
    x += w/2;
    y += h/2;

    int xx = XLOG2DEV(x);
    int yy = YLOG2DEV(y);

    gs_lgp->gnome_print_gsave( m_gpc );

    gs_lgp->gnome_print_translate( m_gpc, xx, yy );
    double scale = (double)YLOG2DEVREL(h) / (double) XLOG2DEVREL(w);
    gs_lgp->gnome_print_scale( m_gpc, 1.0, scale );

    xx = 0;
    yy = 0;

    if (m_brush.GetStyle () != wxTRANSPARENT)
    {
        SetBrush( m_brush );

        gs_lgp->gnome_print_moveto ( m_gpc, xx, yy );
        gs_lgp->gnome_print_arcto( m_gpc, xx, yy,
            XLOG2DEVREL(w)/2, sa, ea, 0 );
        gs_lgp->gnome_print_moveto ( m_gpc, xx, yy );

        gs_lgp->gnome_print_fill( m_gpc );
    }

    if (m_pen.GetStyle () != wxTRANSPARENT)
    {
        SetPen (m_pen);

        gs_lgp->gnome_print_arcto( m_gpc, xx, yy,
            XLOG2DEVREL(w)/2, sa, ea, 0 );

        gs_lgp->gnome_print_stroke( m_gpc );
    }

    gs_lgp->gnome_print_grestore( m_gpc );

    CalcBoundingBox( x, y );
    CalcBoundingBox( x+w, y+h );
}

void wxGnomePrintDC::DoDrawPoint(wxCoord x, wxCoord y)
{
}

void wxGnomePrintDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
{
    if (m_pen.GetStyle() == wxTRANSPARENT) return;

    if (n <= 0) return;

    SetPen (m_pen);

    int i;
    for ( i =0; i<n ; i++ )
        CalcBoundingBox( points[i].x+xoffset, points[i].y+yoffset);

    gs_lgp->gnome_print_moveto ( m_gpc, XLOG2DEV(points[0].x+xoffset), YLOG2DEV(points[0].y+yoffset) );

    for (i = 1; i < n; i++)
        gs_lgp->gnome_print_lineto ( m_gpc, XLOG2DEV(points[i].x+xoffset), YLOG2DEV(points[i].y+yoffset) );

    gs_lgp->gnome_print_stroke ( m_gpc);
}

void wxGnomePrintDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset, int fillStyle)
{
    if (n==0) return;

    if (m_brush.GetStyle () != wxTRANSPARENT)
    {
        SetBrush( m_brush );

        int x = points[0].x + xoffset;
        int y = points[0].y + yoffset;
        CalcBoundingBox( x, y );
        gs_lgp->gnome_print_newpath( m_gpc );
        gs_lgp->gnome_print_moveto( m_gpc, XLOG2DEV(x), YLOG2DEV(y) );
        int i;
        for (i = 1; i < n; i++)
        {
            int x = points[i].x + xoffset;
            int y = points[i].y + yoffset;
            gs_lgp->gnome_print_lineto( m_gpc, XLOG2DEV(x), YLOG2DEV(y) );
            CalcBoundingBox( x, y );
        }
        gs_lgp->gnome_print_closepath( m_gpc );
        gs_lgp->gnome_print_fill( m_gpc );
    }

    if (m_pen.GetStyle () != wxTRANSPARENT)
    {
        SetPen (m_pen);

        int x = points[0].x + xoffset;
        int y = points[0].y + yoffset;
        gs_lgp->gnome_print_newpath( m_gpc );
        gs_lgp->gnome_print_moveto( m_gpc, XLOG2DEV(x), YLOG2DEV(y) );
        int i;
        for (i = 1; i < n; i++)
        {
            int x = points[i].x + xoffset;
            int y = points[i].y + yoffset;
            gs_lgp->gnome_print_lineto( m_gpc, XLOG2DEV(x), YLOG2DEV(y) );
            CalcBoundingBox( x, y );
        }
        gs_lgp->gnome_print_closepath( m_gpc );
        gs_lgp->gnome_print_stroke( m_gpc );
    }
}

void wxGnomePrintDC::DoDrawPolyPolygon(int n, int count[], wxPoint points[], wxCoord xoffset, wxCoord yoffset, int fillStyle)
{
    wxDC::DoDrawPolyPolygon( n, count, points, xoffset, yoffset, fillStyle );
}

void wxGnomePrintDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
{
    if (m_brush.GetStyle () != wxTRANSPARENT)
    {
        SetBrush( m_brush );

        gs_lgp->gnome_print_newpath( m_gpc );
        gs_lgp->gnome_print_moveto( m_gpc, XLOG2DEV(x), YLOG2DEV(y) );
        gs_lgp->gnome_print_lineto( m_gpc, XLOG2DEV(x + width), YLOG2DEV(y) );
        gs_lgp->gnome_print_lineto( m_gpc, XLOG2DEV(x + width), YLOG2DEV(y + height) );
        gs_lgp->gnome_print_lineto( m_gpc, XLOG2DEV(x), YLOG2DEV(y + height) );
        gs_lgp->gnome_print_closepath( m_gpc );
        gs_lgp->gnome_print_fill( m_gpc );

        CalcBoundingBox( x, y );
        CalcBoundingBox( x + width, y + height );
    }

    if (m_pen.GetStyle () != wxTRANSPARENT)
    {
        SetPen (m_pen);

        gs_lgp->gnome_print_newpath( m_gpc );
        gs_lgp->gnome_print_moveto( m_gpc, XLOG2DEV(x), YLOG2DEV(y) );
        gs_lgp->gnome_print_lineto( m_gpc, XLOG2DEV(x + width), YLOG2DEV(y) );
        gs_lgp->gnome_print_lineto( m_gpc, XLOG2DEV(x + width), YLOG2DEV(y + height) );
        gs_lgp->gnome_print_lineto( m_gpc, XLOG2DEV(x), YLOG2DEV(y + height) );
        gs_lgp->gnome_print_closepath( m_gpc );
        gs_lgp->gnome_print_stroke( m_gpc );

        CalcBoundingBox( x, y );
        CalcBoundingBox( x + width, y + height );
    }
}

void wxGnomePrintDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
{
    wxCoord rad = (wxCoord) radius;

    if (m_brush.GetStyle() != wxTRANSPARENT)
    {
        SetBrush(m_brush);
        gs_lgp->gnome_print_newpath(m_gpc);
        gs_lgp->gnome_print_moveto(m_gpc,XLOG2DEV(x + rad),YLOG2DEV(y));
        gs_lgp->gnome_print_curveto(m_gpc,
                                    XLOG2DEV(x + rad),YLOG2DEV(y),
                                    XLOG2DEV(x),YLOG2DEV(y),
                                    XLOG2DEV(x),YLOG2DEV(y + rad));
        gs_lgp->gnome_print_lineto(m_gpc,XLOG2DEV(x),YLOG2DEV(y + height - rad));
        gs_lgp->gnome_print_curveto(m_gpc,
                                    XLOG2DEV(x),YLOG2DEV(y + height - rad),
                                    XLOG2DEV(x),YLOG2DEV(y + height),
                                    XLOG2DEV(x + rad),YLOG2DEV(y + height));
        gs_lgp->gnome_print_lineto(m_gpc,XLOG2DEV(x + width - rad),YLOG2DEV(y + height));
        gs_lgp->gnome_print_curveto(m_gpc,
                                    XLOG2DEV(x + width - rad),YLOG2DEV(y + height),
                                    XLOG2DEV(x + width),YLOG2DEV(y + height),
                                    XLOG2DEV(x + width),YLOG2DEV(y + height - rad));
        gs_lgp->gnome_print_lineto(m_gpc,XLOG2DEV(x + width),YLOG2DEV(y + rad));
        gs_lgp->gnome_print_curveto(m_gpc,
                                    XLOG2DEV(x + width),YLOG2DEV(y + rad),
                                    XLOG2DEV(x + width),YLOG2DEV(y),
                                    XLOG2DEV(x + width - rad),YLOG2DEV(y));
        gs_lgp->gnome_print_lineto(m_gpc,XLOG2DEV(x + rad),YLOG2DEV(y));
        gs_lgp->gnome_print_closepath(m_gpc);
        gs_lgp->gnome_print_fill(m_gpc);

        CalcBoundingBox(x,y);
        CalcBoundingBox(x+width,y+height);
    }

    if (m_pen.GetStyle() != wxTRANSPARENT)
    {
        SetPen(m_pen);
        gs_lgp->gnome_print_newpath(m_gpc);
        gs_lgp->gnome_print_moveto(m_gpc,XLOG2DEV(x + rad),YLOG2DEV(y));
        gs_lgp->gnome_print_curveto(m_gpc,
                                    XLOG2DEV(x + rad),YLOG2DEV(y),
                                    XLOG2DEV(x),YLOG2DEV(y),
                                    XLOG2DEV(x),YLOG2DEV(y + rad));
        gs_lgp->gnome_print_lineto(m_gpc,XLOG2DEV(x),YLOG2DEV(y + height - rad));
        gs_lgp->gnome_print_curveto(m_gpc,