X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/d31d30d791201146a5e224d3bf0f0cd909300bba..d3f81b85331b14943862a0c0df5ef8adb4426ad4:/src/gtk/print.cpp

diff --git a/src/gtk/print.cpp b/src/gtk/print.cpp
index 8f8a48239b..071c5e6733 100644
--- a/src/gtk/print.cpp
+++ b/src/gtk/print.cpp
@@ -1,9 +1,9 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        wx/gtk/print.cpp
+// Name:        src/gtk/print.cpp
 // Author:      Anthony Bretaudeau
 // Purpose:     GTK printing support
 // Created:     2007-08-25
-// RCS-ID:      $Id: print.cpp,v 1 2007-08-25 05:44:44 PC Exp $
+// RCS-ID:      $Id$
 // Copyright:   (c) 2007 wxWidgets development team
 // Licence:     wxWindows Licence
 /////////////////////////////////////////////////////////////////////////////
@@ -34,10 +34,15 @@
 #include "wx/gtk/private.h"
 #include "wx/dynlib.h"
 #include "wx/paper.h"
-#include "wx/rawbmp.h"
 
 #include <gtk/gtk.h>
+
+#if GTK_CHECK_VERSION(2,14,0)
+#include <gtk/gtkunixprint.h>
+#else
 #include <gtk/gtkpagesetupunixdialog.h>
+#endif
+
 
 #if wxUSE_GRAPHICS_CONTEXT
 #include "wx/graphics.h"
@@ -50,7 +55,9 @@ wxFORCE_LINK_THIS_MODULE(gtk_print)
 #include "wx/gtk/gnome/gprint.h"
 #endif
 
-// Usefull to convert angles from/to Rad to/from Deg.
+#include "wx/gtk/private/object.h"
+
+// Useful to convert angles from/to Rad to/from Deg.
 static const double RAD2DEG  = 180.0 / M_PI;
 static const double DEG2RAD  = M_PI / 180.0;
 
@@ -213,25 +220,6 @@ extern "C"
 
         printout->OnEndPrinting();
     }
-
-    static gboolean
-    gtk_preview_print_callback(GtkPrintOperation * WXUNUSED(operation),
-                               GtkPrintOperationPreview * WXUNUSED(preview),
-                               GtkPrintContext *context,
-                               GtkWindow *parent,
-                               gpointer user_data)
-    {
-        wxPrintout *printout = (wxPrintout *) user_data;
-
-        printout->SetIsPreview(true);
-
-        /* We create a Cairo context with 72dpi resolution. This resolution is
-         * only used for positioning. */
-        cairo_t *cairo = gdk_cairo_create(GTK_WIDGET(parent)->window);
-        gtk_print_context_set_cairo_context(context, cairo, 72, 72);
-
-        return false;
-    }
 }
 
 //----------------------------------------------------------------------------
@@ -243,11 +231,14 @@ IMPLEMENT_CLASS(wxGtkPrintNativeData, wxPrintNativeDataBase)
 wxGtkPrintNativeData::wxGtkPrintNativeData()
 {
     m_config = gtk_print_settings_new();
+    m_job = gtk_print_operation_new();
+    m_context = NULL;
 }
 
 wxGtkPrintNativeData::~wxGtkPrintNativeData()
 {
-    g_object_unref (m_config);
+    g_object_unref(m_job);
+    g_object_unref(m_config);
 }
 
 // Convert datas stored in m_config to a wxPrintData.
@@ -407,6 +398,9 @@ bool wxGtkPrintNativeData::TransferTo( wxPrintData &data )
         data.SetPaperId( wxPAPER_FANFOLD_LGL_GERMAN);
     else
         data.SetPaperId(wxPAPER_NONE);
+
+    data.SetPrinterName(gtk_print_settings_get_printer(m_config));
+
     return true;
 }
 
@@ -555,6 +549,8 @@ bool wxGtkPrintNativeData::TransferFrom( const wxPrintData &data )
         default:                break;
     }
 
+    gtk_print_settings_set_printer(m_config, data.GetPrinterName().utf8_str());
+
     return true;
 }
 
@@ -650,17 +646,19 @@ int wxGtkPrintDialog::ShowModal()
         gtk_print_settings_set_page_ranges (settings, range, 1);
     }
 
+    GtkPrintOperation * const printOp = native->GetPrintJob();
+
     // If the settings are OK, we restore it.
     if (settings != NULL)
-        gtk_print_operation_set_print_settings (native->GetPrintJob(), settings);
-    gtk_print_operation_set_default_page_setup (native->GetPrintJob(), native->GetPageSetupFromSettings(settings));
+        gtk_print_operation_set_print_settings (printOp, settings);
+    gtk_print_operation_set_default_page_setup (printOp, native->GetPageSetupFromSettings(settings));
 
     // Show the dialog if needed.
     GError* gError = NULL;
     if (GetShowDialog())
-        response = gtk_print_operation_run (native->GetPrintJob(), GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG, GTK_WINDOW(gtk_widget_get_toplevel(m_parent->m_widget) ), &gError);
+        response = gtk_print_operation_run (printOp, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG, GTK_WINDOW(gtk_widget_get_toplevel(m_parent->m_widget) ), &gError);
     else
-        response = gtk_print_operation_run (native->GetPrintJob(), GTK_PRINT_OPERATION_ACTION_PRINT, GTK_WINDOW(gtk_widget_get_toplevel(m_parent->m_widget)), &gError);
+        response = gtk_print_operation_run (printOp, GTK_PRINT_OPERATION_ACTION_PRINT, GTK_WINDOW(gtk_widget_get_toplevel(m_parent->m_widget)), &gError);
 
     // Does everything went well?
     if (response == GTK_PRINT_OPERATION_RESULT_CANCEL)
@@ -669,16 +667,22 @@ int wxGtkPrintDialog::ShowModal()
     }
     else if (response == GTK_PRINT_OPERATION_RESULT_ERROR)
     {
+        wxLogError(_("Error while printing: ") + wxString(gError ? gError->message : "???"));
         g_error_free (gError);
-        wxLogError(_("Error while printing: ") + wxString::Format(_("%s"), gError->message));
         return wxID_NO; // We use wxID_NO because there is no wxID_ERROR available
     }
 
     // Now get the settings and save it.
-    GtkPrintSettings* newSettings = gtk_print_operation_get_print_settings (native->GetPrintJob());
+    GtkPrintSettings* newSettings = gtk_print_operation_get_print_settings(printOp);
     native->SetPrintConfig(newSettings);
     data.ConvertFromNative();
 
+    // Set PrintDialogData variables
+    m_printDialogData.SetPrintData(data);
+    m_printDialogData.SetCollate(data.GetCollate());
+    m_printDialogData.SetNoCopies(data.GetNoCopies());
+    m_printDialogData.SetPrintToFile(data.GetPrinterName() == "Print to File");
+
     // Same problem as a few lines before.
     switch (gtk_print_settings_get_print_pages(newSettings))
     {
@@ -756,43 +760,80 @@ int wxGtkPageSetupDialog::ShowModal()
         }
     }
 
-    // Now show the dialog.
-    GtkPageSetup* newPageSetup = gtk_print_run_page_setup_dialog (GTK_WINDOW(m_parent->m_widget),
-                                                           oldPageSetup,
-                                                           nativeData);
-
-    int ret;
-    if (newPageSetup != oldPageSetup)
-    {
-        native->SetPageSetupToSettings(nativeData, newPageSetup);
-        m_pageDialogData.GetPrintData().ConvertFromNative();
 
-        // Store custom paper format if any.
-        if (m_pageDialogData.GetPrintData().GetPaperId() == wxPAPER_NONE)
-        {
-            gdouble ml,mr,mt,mb,pw,ph;
-            ml = gtk_page_setup_get_left_margin (newPageSetup, GTK_UNIT_MM);
-            mr = gtk_page_setup_get_right_margin (newPageSetup, GTK_UNIT_MM);
-            mt = gtk_page_setup_get_top_margin (newPageSetup, GTK_UNIT_MM);
-            mb = gtk_page_setup_get_bottom_margin (newPageSetup, GTK_UNIT_MM);
+    // Set selected printer
+    gtk_print_settings_set(nativeData, "format-for-printer",
+                           gtk_print_settings_get_printer(nativeData));
 
-            pw = gtk_page_setup_get_paper_width (newPageSetup, GTK_UNIT_MM);
-            ph = gtk_page_setup_get_paper_height (newPageSetup, GTK_UNIT_MM);
+    // Create custom dialog
+    wxString title(GetTitle());
+    if ( title.empty() )
+        title = _("Page Setup");
+    GtkWidget *
+        dlg = gtk_page_setup_unix_dialog_new(title.utf8_str(),
+                                             GTK_WINDOW(m_parent->m_widget));
 
-            m_pageDialogData.SetMarginTopLeft( wxPoint( (int)(ml+0.5), (int)(mt+0.5)) );
-            m_pageDialogData.SetMarginBottomRight( wxPoint( (int)(mr+0.5), (int)(mb+0.5)) );
+    gtk_page_setup_unix_dialog_set_print_settings(
+        GTK_PAGE_SETUP_UNIX_DIALOG(dlg), nativeData);
+    gtk_page_setup_unix_dialog_set_page_setup(
+        GTK_PAGE_SETUP_UNIX_DIALOG(dlg), oldPageSetup);
 
-            m_pageDialogData.SetPaperSize( wxSize( (int)(pw+0.5), (int)(ph+0.5) ) );
-        }
+    int result = gtk_dialog_run(GTK_DIALOG(dlg));
+    gtk_widget_hide(dlg);
 
-        ret = wxID_OK;
-    }
-    else
+    switch ( result )
     {
-        ret = wxID_CANCEL;
+        case GTK_RESPONSE_OK:
+        case GTK_RESPONSE_APPLY:
+            {
+                // Store Selected Printer Name
+                gtk_print_settings_set_printer
+                (
+                    nativeData,
+                    gtk_print_settings_get(nativeData, "format-for-printer")
+                );
+
+                wxGtkObject<GtkPageSetup>
+                    newPageSetup(gtk_page_setup_unix_dialog_get_page_setup(
+                                        GTK_PAGE_SETUP_UNIX_DIALOG(dlg)));
+                native->SetPageSetupToSettings(nativeData, newPageSetup);
+
+                m_pageDialogData.GetPrintData().ConvertFromNative();
+
+                // Store custom paper format if any.
+                if ( m_pageDialogData.GetPrintData().GetPaperId() == wxPAPER_NONE )
+                {
+                    gdouble ml,mr,mt,mb,pw,ph;
+                    ml = gtk_page_setup_get_left_margin (newPageSetup, GTK_UNIT_MM);
+                    mr = gtk_page_setup_get_right_margin (newPageSetup, GTK_UNIT_MM);
+                    mt = gtk_page_setup_get_top_margin (newPageSetup, GTK_UNIT_MM);
+                    mb = gtk_page_setup_get_bottom_margin (newPageSetup, GTK_UNIT_MM);
+
+                    pw = gtk_page_setup_get_paper_width (newPageSetup, GTK_UNIT_MM);
+                    ph = gtk_page_setup_get_paper_height (newPageSetup, GTK_UNIT_MM);
+
+                    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)));
+                }
+
+                result = wxID_OK;
+            }
+            break;
+
+        default:
+        case GTK_RESPONSE_CANCEL:
+            result = wxID_CANCEL;
+            break;
     }
 
-    return ret;
+    gtk_widget_destroy(dlg);
+
+    return result;
 }
 
 //----------------------------------------------------------------------------
@@ -853,11 +894,7 @@ bool wxGtkPrinter::Print(wxWindow *parent, wxPrintout *printout, bool prompt )
     wxPrintData printdata = GetPrintDialogData().GetPrintData();
     wxGtkPrintNativeData *native = (wxGtkPrintNativeData*) printdata.GetNativeData();
 
-    GtkPrintOperation *printOp = gtk_print_operation_new ();
-
-    native->SetPrintJob( printOp );
-
-    printout->SetIsPreview(false);
+    GtkPrintOperation * const printOp = native->GetPrintJob();
 
     wxPrinterToGtkData dataToSend;
     dataToSend.printer = this;
@@ -867,7 +904,6 @@ bool wxGtkPrinter::Print(wxWindow *parent, wxPrintout *printout, bool prompt )
     g_signal_connect (printOp, "begin-print", G_CALLBACK (gtk_begin_print_callback), &dataToSend);
     g_signal_connect (printOp, "draw-page", G_CALLBACK (gtk_draw_page_print_callback), &dataToSend);
     g_signal_connect (printOp, "end-print", G_CALLBACK (gtk_end_print_callback), printout);
-    g_signal_connect (printOp, "preview", G_CALLBACK (gtk_preview_print_callback), printout);
 
     // This is used to setup the DC and
     // show the dialog if desired
@@ -887,8 +923,6 @@ bool wxGtkPrinter::Print(wxWindow *parent, wxPrintout *printout, bool prompt )
         wxFAIL_MSG(_("The print dialog returned an error."));
     }
 
-    g_object_unref (printOp);
-
     return (sm_lastError == wxPRINTER_NO_ERROR);
 }
 
@@ -1074,7 +1108,7 @@ wxDC* wxGtkPrinter::PrintDialog( wxWindow *parent )
     }
 
     m_printDialogData = dialog.GetPrintDialogData();
-    
+
     return new wxPrinterDC( m_printDialogData.GetPrintData() );
 }
 
@@ -1132,7 +1166,7 @@ wxGtkPrinterDCImpl::wxGtkPrinterDCImpl(wxPrinterDC *owner, const wxPrintData& da
 #if wxCAIRO_SCALE
     m_PS2DEV = 1.0;
     m_DEV2PS = 1.0;
-    
+
     cairo_scale( m_cairo, 72.0 / (double)m_resolution, 72.0 / (double)m_resolution );
 #else
     m_PS2DEV = (double)m_resolution / 72.0;
@@ -1175,7 +1209,7 @@ void* wxGtkPrinterDCImpl::GetCairoContext() const
 bool wxGtkPrinterDCImpl::DoFloodFill(wxCoord WXUNUSED(x1),
                                wxCoord WXUNUSED(y1),
                                const wxColour& WXUNUSED(col),
-                               int WXUNUSED(style))
+                               wxFloodFillStyle WXUNUSED(style))
 {
     // We can't access the given coord as a Cairo context is scalable, ie a
     // coord doesn't mean anything in this context.
@@ -1290,7 +1324,8 @@ bool wxGtkPrinterDCImpl::DoGetPixel(wxCoord WXUNUSED(x1),
 
 void wxGtkPrinterDCImpl::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
 {
-    if  (m_pen.GetStyle() == wxPENSTYLE_TRANSPARENT) return;
+    if ( m_pen.IsTransparent() )
+        return;
 
     SetPen( m_pen );
     cairo_move_to ( m_cairo, XLOG2DEV(x1), YLOG2DEV(y1) );
@@ -1398,7 +1433,8 @@ void wxGtkPrinterDCImpl::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord
 
 void wxGtkPrinterDCImpl::DoDrawPoint(wxCoord x, wxCoord y)
 {
-    if  (m_pen.GetStyle() == wxPENSTYLE_TRANSPARENT) return;
+    if ( m_pen.IsTransparent() )
+        return;
 
     SetPen( m_pen );
 
@@ -1411,7 +1447,9 @@ void wxGtkPrinterDCImpl::DoDrawPoint(wxCoord x, wxCoord y)
 
 void wxGtkPrinterDCImpl::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
 {
-    if (m_pen.GetStyle() == wxPENSTYLE_TRANSPARENT) return;
+    if ( m_pen.IsTransparent() )
+        return;
+
 
     if (n <= 0) return;
 
@@ -1429,7 +1467,9 @@ void wxGtkPrinterDCImpl::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, w
     cairo_stroke ( m_cairo);
 }
 
-void wxGtkPrinterDCImpl::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset, int fillStyle)
+void wxGtkPrinterDCImpl::DoDrawPolygon(int n, wxPoint points[],
+                                       wxCoord xoffset, wxCoord yoffset,
+                                       wxPolygonFillMode fillStyle)
 {
     if (n==0) return;
 
@@ -1463,7 +1503,9 @@ void wxGtkPrinterDCImpl::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset,
     cairo_restore(m_cairo);
 }
 
-void wxGtkPrinterDCImpl::DoDrawPolyPolygon(int n, int count[], wxPoint points[], wxCoord xoffset, wxCoord yoffset, int fillStyle)
+void wxGtkPrinterDCImpl::DoDrawPolyPolygon(int n, int count[], wxPoint points[],
+                                           wxCoord xoffset, wxCoord yoffset,
+                                           wxPolygonFillMode fillStyle)
 {
     wxDCImpl::DoDrawPolyPolygon( n, count, points, xoffset, yoffset, fillStyle );
 }
@@ -1622,7 +1664,7 @@ void wxGtkPrinterDCImpl::DoDrawSpline(const wxPointList *points)
 bool wxGtkPrinterDCImpl::DoBlit(wxCoord xdest, wxCoord ydest,
                           wxCoord width, wxCoord height,
                           wxDC *source, wxCoord xsrc, wxCoord ysrc,
-                          int rop, bool useMask,
+                          wxRasterOperationMode rop, bool useMask,
                           wxCoord WXUNUSED_UNLESS_DEBUG(xsrcMask),
                           wxCoord WXUNUSED_UNLESS_DEBUG(ysrcMask))
 {
@@ -1653,84 +1695,13 @@ void wxGtkPrinterDCImpl::DoDrawBitmap( const wxBitmap& bitmap, wxCoord x, wxCoor
 {
     wxCHECK_RET( bitmap.IsOk(), wxT("Invalid bitmap in wxGtkPrinterDCImpl::DoDrawBitmap"));
 
-    cairo_surface_t* surface;
     x = wxCoord(XLOG2DEV(x));
     y = wxCoord(YLOG2DEV(y));
     int bw = bitmap.GetWidth();
     int bh = bitmap.GetHeight();
     wxBitmap bmpSource = bitmap;  // we need a non-const instance.
-    unsigned char* buffer = new unsigned char[bw*bh*4];
-    wxUint32* data = (wxUint32*)buffer;
-
-    wxMask *mask = NULL;
-    if (useMask) mask = bmpSource.GetMask();
-
-    // Create a surface object and copy the bitmap pixel data to it. If the image has alpha (or a mask represented as alpha)
-    // then we'll use a different format and iterator than if it doesn't.
-    if (bmpSource.HasAlpha() || mask)
-    {
-        surface = cairo_image_surface_create_for_data(
-            buffer, CAIRO_FORMAT_ARGB32, bw, bh, bw*4);
-        wxAlphaPixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
-        wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
-
-        wxAlphaPixelData::Iterator p(pixData);
-        int y, x;
-        for (y=0; y<bh; y++)
-        {
-            wxAlphaPixelData::Iterator rowStart = p;
-            for (x=0; x<bw; x++)
-            {
-                // Each pixel in CAIRO_FORMAT_ARGB32 is a 32-bit quantity,
-                // with alpha in the upper 8 bits, then red, then green, then
-                // blue. The 32-bit quantities are stored native-endian.
-                // Pre-multiplied alpha is used.
-                unsigned char alpha = p.Alpha();
-
-                if (!bmpSource.HasAlpha() && mask)
-                    alpha = 255;
-
-                if (alpha == 0)
-                    *data = 0;
-                else
-                    *data = ( alpha                  << 24
-                              | (p.Red() * alpha/255)    << 16
-                              | (p.Green() * alpha/255)  <<  8
-                              | (p.Blue() * alpha/255) );
-                ++data;
-                ++p;
-            }
-            p = rowStart;
-            p.OffsetY(pixData, 1);
-        }
-    }
-    else  // no alpha
-    {
-        surface = cairo_image_surface_create_for_data(
-            buffer, CAIRO_FORMAT_RGB24, bw, bh, bw*4);
-        wxNativePixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
-        wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
-
-        wxNativePixelData::Iterator p(pixData);
-        int y, x;
-        for (y=0; y<bh; y++)
-        {
-            wxNativePixelData::Iterator rowStart = p;
-            for (x=0; x<bw; x++)
-            {
-                // Each pixel in CAIRO_FORMAT_RGB24 is a 32-bit quantity, with
-                // the upper 8 bits unused. Red, Green, and Blue are stored in
-                // the remaining 24 bits in that order.  The 32-bit quantities
-                // are stored native-endian.
-                *data = ( p.Red() << 16 | p.Green() << 8 | p.Blue() );
-                ++data;
-                ++p;
-            }
-            p = rowStart;
-            p.OffsetY(pixData, 1);
-        }
-    }
-
+    if (!useMask && !bitmap.HasPixbuf() && bitmap.GetMask())
+        bmpSource.SetMask(NULL);
 
     cairo_save(m_cairo);
 
@@ -1738,24 +1709,17 @@ void wxGtkPrinterDCImpl::DoDrawBitmap( const wxBitmap& bitmap, wxCoord x, wxCoor
     cairo_translate(m_cairo, x, y);
 
     // Scale the image
-    cairo_filter_t filter = CAIRO_FILTER_BILINEAR;
-    cairo_pattern_t* pattern = cairo_pattern_create_for_surface(surface);
-    cairo_pattern_set_filter(pattern,filter);
     wxDouble scaleX = (wxDouble) XLOG2DEVREL(bw) / (wxDouble) bw;
     wxDouble scaleY = (wxDouble) YLOG2DEVREL(bh) / (wxDouble) bh;
     cairo_scale(m_cairo, scaleX, scaleY);
 
-    cairo_set_source(m_cairo, pattern);
+    gdk_cairo_set_source_pixbuf(m_cairo, bmpSource.GetPixbuf(), 0, 0);
+    cairo_pattern_set_filter(cairo_get_source(m_cairo), CAIRO_FILTER_NEAREST);
     // Use the original size here since the context is scaled already.
     cairo_rectangle(m_cairo, 0, 0, bw, bh);
     // Fill the rectangle using the pattern.
     cairo_fill(m_cairo);
 
-    // Clean up.
-    cairo_pattern_destroy(pattern);
-    cairo_surface_destroy(surface);
-    delete [] buffer;
-
     CalcBoundingBox(0,0);
     CalcBoundingBox(bw,bh);
 
@@ -1774,9 +1738,9 @@ void wxGtkPrinterDCImpl::DoDrawRotatedText(const wxString& text, wxCoord x, wxCo
 
     angle = -angle;
 
-    bool underlined = m_font.Ok() && m_font.GetUnderlined();
+    bool underlined = m_font.IsOk() && m_font.GetUnderlined();
 
-    const wxUTF8Buf data = text.utf8_str();
+    const wxScopedCharBuffer data = text.utf8_str();
 
     size_t datalen = strlen(data);
     pango_layout_set_text( m_layout, data, datalen);
@@ -1792,7 +1756,7 @@ void wxGtkPrinterDCImpl::DoDrawRotatedText(const wxString& text, wxCoord x, wxCo
         pango_attr_list_unref(attrs);
     }
 
-    if (m_textForegroundColour.Ok())
+    if (m_textForegroundColour.IsOk())
     {
         unsigned char red = m_textForegroundColour.Red();
         unsigned char blue = m_textForegroundColour.Blue();
@@ -1866,7 +1830,7 @@ void wxGtkPrinterDCImpl::DoDrawRotatedText(const wxString& text, wxCoord x, wxCo
 void wxGtkPrinterDCImpl::Clear()
 {
 // Clear does nothing for printing, but keep the code
-// for later reuse 
+// for later reuse
 /*
     cairo_save(m_cairo);
     cairo_set_operator (m_cairo, CAIRO_OPERATOR_SOURCE);
@@ -1880,7 +1844,7 @@ void wxGtkPrinterDCImpl::SetFont( const wxFont& font )
 {
     m_font = font;
 
-    if (m_font.Ok())
+    if (m_font.IsOk())
     {
         if (m_fontdesc)
             pango_font_description_free( m_fontdesc );
@@ -1897,12 +1861,12 @@ void wxGtkPrinterDCImpl::SetFont( const wxFont& font )
 
 void wxGtkPrinterDCImpl::SetPen( const wxPen& pen )
 {
-    if (!pen.Ok()) return;
+    if (!pen.IsOk()) return;
 
     m_pen = pen;
 
     double width;
-    
+
     if (m_pen.GetWidth() <= 0)
         width = 0.1;
     else
@@ -1976,7 +1940,7 @@ void wxGtkPrinterDCImpl::SetPen( const wxPen& pen )
 
 void wxGtkPrinterDCImpl::SetBrush( const wxBrush& brush )
 {
-    if (!brush.Ok()) return;
+    if (!brush.IsOk()) return;
 
     m_brush = brush;
 
@@ -2067,7 +2031,7 @@ void wxGtkPrinterDCImpl::SetBrush( const wxBrush& brush )
     }
 }
 
-void wxGtkPrinterDCImpl::SetLogicalFunction( int function )
+void wxGtkPrinterDCImpl::SetLogicalFunction( wxRasterOperationMode function )
 {
     if (function == wxCLEAR)
         cairo_set_operator (m_cairo, CAIRO_OPERATOR_CLEAR);
@@ -2178,7 +2142,7 @@ void wxGtkPrinterDCImpl::DoGetTextExtent(const wxString& string, wxCoord *width,
     cairo_scale(m_cairo, m_scaleX, m_scaleY);
 
     // Set layout's text
-    const wxUTF8Buf dataUTF8 = string.utf8_str();
+    const wxScopedCharBuffer dataUTF8 = string.utf8_str();
 
     gint oldSize=0;
     if ( theFont )
@@ -2249,9 +2213,9 @@ void wxGtkPrinterDCImpl::SetPrintData(const wxPrintData& data)
     m_printData = data;
 }
 
-// overriden for wxPrinterDC Impl
+// overridden for wxPrinterDC Impl
 
-wxRect wxGtkPrinterDCImpl::GetPaperRect()
+wxRect wxGtkPrinterDCImpl::GetPaperRect() const
 {
     // Does GtkPrint support printer margins?
     int w = 0;
@@ -2260,7 +2224,7 @@ wxRect wxGtkPrinterDCImpl::GetPaperRect()
     return wxRect( 0,0,w,h );
 }
 
-int wxGtkPrinterDCImpl::GetResolution()
+int wxGtkPrinterDCImpl::GetResolution() const
 {
     return m_resolution;
 }
@@ -2350,14 +2314,20 @@ void wxGtkPrintPreview::DetermineScaling()
 
     if (paper)
     {
-        m_previewPrintout->SetPPIScreen(wxGetDisplayPPI());
-        m_previewPrintout->SetPPIPrinter( m_resolution, m_resolution );
+        const wxSize screenPPI = wxGetDisplayPPI();
+        int logPPIScreenX = screenPPI.GetWidth();
+        int logPPIScreenY = screenPPI.GetHeight();
+        int logPPIPrinterX = m_resolution;
+        int logPPIPrinterY = m_resolution;
+
+        m_previewPrintout->SetPPIScreen( logPPIScreenX, logPPIScreenY );
+        m_previewPrintout->SetPPIPrinter( logPPIPrinterX, logPPIPrinterY );
 
         // Get width and height in points (1/72th of an inch)
         wxSize sizeDevUnits(paper->GetSizeDeviceUnits());
         sizeDevUnits.x = wxRound((double)sizeDevUnits.x * (double)m_resolution / 72.0);
         sizeDevUnits.y = wxRound((double)sizeDevUnits.y * (double)m_resolution / 72.0);
-        
+
         wxSize sizeTenthsMM(paper->GetSize());
         wxSize sizeMM(sizeTenthsMM.x / 10, sizeTenthsMM.y / 10);
 
@@ -2378,8 +2348,8 @@ void wxGtkPrintPreview::DetermineScaling()
         m_previewPrintout->SetPaperRectPixels(wxRect(0, 0, m_pageWidth, m_pageHeight));
 
         // At 100%, the page should look about page-size on the screen.
-        m_previewScaleX = 0.8 * 72.0 / (double)m_resolution;
-        m_previewScaleY = m_previewScaleX;
+        m_previewScaleX = float(logPPIScreenX) / logPPIPrinterX;
+        m_previewScaleY = float(logPPIScreenY) / logPPIPrinterY;
     }
 }