X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c933e267beed72a1c535c8d30ac930fc80587add..d38315df30415b030d93172123920d69c5c5e3b6:/src/common/prntbase.cpp?ds=inline

diff --git a/src/common/prntbase.cpp b/src/common/prntbase.cpp
index e70b4f0b4c..cb7452bd38 100644
--- a/src/common/prntbase.cpp
+++ b/src/common/prntbase.cpp
@@ -212,7 +212,7 @@ wxDialog *wxNativePrintFactory::CreatePrintSetupDialog( wxWindow *parent,
 
 wxDCImpl* wxNativePrintFactory::CreatePrinterDCImpl( wxPrinterDC *owner, const wxPrintData& data )
 {
-#if defined(__WXGTK__) || defined(__WXMOTIF__) || defined(__WXUNIVERSAL__)
+#if defined(__WXGTK__) || defined(__WXMOTIF__) || ( defined(__WXUNIVERSAL__) && !defined(__WXMAC__) )
     return new wxPostScriptDCImpl( owner, data );
 #else
     return new wxPrinterDCImpl( owner, data );
@@ -261,7 +261,7 @@ wxPrintNativeDataBase *wxNativePrintFactory::CreatePrintNativeData()
 #if defined(__WXMSW__) && !defined(__WXUNIVERSAL__)
     return new wxWindowsPrintNativeData;
 #elif defined(__WXMAC__)
-    return new wxMacCarbonPrintData;
+    return wxOSXCreatePrintData();
 #else
     return new wxPostScriptPrintNativeData;
 #endif
@@ -303,15 +303,15 @@ IMPLEMENT_CLASS(wxPrinterBase, wxObject)
 
 wxPrinterBase::wxPrinterBase(wxPrintDialogData *data)
 {
-    m_currentPrintout = (wxPrintout *) NULL;
-    sm_abortWindow = (wxWindow *) NULL;
+    m_currentPrintout = NULL;
+    sm_abortWindow = NULL;
     sm_abortIt = false;
     if (data)
         m_printDialogData = (*data);
     sm_lastError = wxPRINTER_NO_ERROR;
 }
 
-wxWindow *wxPrinterBase::sm_abortWindow = (wxWindow *) NULL;
+wxWindow *wxPrinterBase::sm_abortWindow = NULL;
 bool wxPrinterBase::sm_abortIt = false;
 wxPrinterError wxPrinterBase::sm_lastError = wxPRINTER_NO_ERROR;
 
@@ -512,7 +512,8 @@ void wxPrintAbortDialog::OnCancel(wxCommandEvent& WXUNUSED(event))
     wxPrinterBase::sm_abortIt = true;
     wxPrinterBase::sm_abortWindow->Show(false);
     wxPrinterBase::sm_abortWindow->Close(true);
-    wxPrinterBase::sm_abortWindow = (wxWindow *) NULL;
+    wxPrinterBase::sm_abortWindow->Destroy();
+    wxPrinterBase::sm_abortWindow = NULL;
 }
 
 //----------------------------------------------------------------------------
@@ -524,7 +525,7 @@ IMPLEMENT_ABSTRACT_CLASS(wxPrintout, wxObject)
 wxPrintout::wxPrintout(const wxString& title)
 {
     m_printoutTitle = title ;
-    m_printoutDC = (wxDC *) NULL;
+    m_printoutDC = NULL;
     m_pageWidthMM = 0;
     m_pageHeightMM = 0;
     m_pageWidthPixels = 0;
@@ -533,7 +534,7 @@ wxPrintout::wxPrintout(const wxString& title)
     m_PPIScreenY = 0;
     m_PPIPrinterX = 0;
     m_PPIPrinterY = 0;
-    m_isPreview = false;
+    m_preview = NULL;
 }
 
 wxPrintout::~wxPrintout()
@@ -586,7 +587,7 @@ void wxPrintout::FitThisSizeToPaper(const wxSize& imageSize)
     float scaleX = ((float(paperRect.width) * w) / (float(pw) * imageSize.x));
     float scaleY = ((float(paperRect.height) * h) / (float(ph) * imageSize.y));
     float actualScale = wxMin(scaleX, scaleY);
-    m_printoutDC->SetUserScale(actualScale, actualScale); 
+    m_printoutDC->SetUserScale(actualScale, actualScale);
     m_printoutDC->SetDeviceOrigin(0, 0);
     wxRect logicalPaperRect = GetLogicalPaperRect();
     SetLogicalOrigin(logicalPaperRect.x, logicalPaperRect.y);
@@ -603,7 +604,7 @@ void wxPrintout::FitThisSizeToPage(const wxSize& imageSize)
     float scaleX = float(w) / imageSize.x;
     float scaleY = float(h) / imageSize.y;
     float actualScale = wxMin(scaleX, scaleY);
-    m_printoutDC->SetUserScale(actualScale, actualScale); 
+    m_printoutDC->SetUserScale(actualScale, actualScale);
     m_printoutDC->SetDeviceOrigin(0, 0);
 }
 
@@ -631,7 +632,7 @@ void wxPrintout::FitThisSizeToPageMargins(const wxSize& imageSize, const wxPageS
     float scaleX = (float(pageMarginsRect.width) * w) / (float(pw) * imageSize.x);
     float scaleY = (float(pageMarginsRect.height) * h) / (float(ph) * imageSize.y);
     float actualScale = wxMin(scaleX, scaleY);
-    m_printoutDC->SetUserScale(actualScale, actualScale); 
+    m_printoutDC->SetUserScale(actualScale, actualScale);
     m_printoutDC->SetDeviceOrigin(0, 0);
     wxRect logicalPageMarginsRect = GetLogicalPageMarginsRect(pageSetupData);
     SetLogicalOrigin(logicalPageMarginsRect.x, logicalPageMarginsRect.y);
@@ -654,16 +655,16 @@ void wxPrintout::MapScreenSizeToPage()
     // Set the DC scale and origin so that an image on the screen is the same
     // size on the paper and the origin is at the top left of the printable area.
     if (!m_printoutDC) return;
-    int ppiScreenX, ppiScreenY; 
-    GetPPIScreen(&ppiScreenX, &ppiScreenY); 
-    int ppiPrinterX, ppiPrinterY; 
-    GetPPIPrinter(&ppiPrinterX, &ppiPrinterY); 
-    int w, h; 
-    m_printoutDC->GetSize(&w, &h); 
-    int pageSizePixelsX, pageSizePixelsY; 
-    GetPageSizePixels(&pageSizePixelsX, &pageSizePixelsY); 
-    float userScaleX = (float(ppiPrinterX) * w) / (float(ppiScreenX) * pageSizePixelsX); 
-    float userScaleY = (float(ppiPrinterY) * h) / (float(ppiScreenY) * pageSizePixelsY); 
+    int ppiScreenX, ppiScreenY;
+    GetPPIScreen(&ppiScreenX, &ppiScreenY);
+    int ppiPrinterX, ppiPrinterY;
+    GetPPIPrinter(&ppiPrinterX, &ppiPrinterY);
+    int w, h;
+    m_printoutDC->GetSize(&w, &h);
+    int pageSizePixelsX, pageSizePixelsY;
+    GetPageSizePixels(&pageSizePixelsX, &pageSizePixelsY);
+    float userScaleX = (float(ppiPrinterX) * w) / (float(ppiScreenX) * pageSizePixelsX);
+    float userScaleY = (float(ppiPrinterY) * h) / (float(ppiScreenY) * pageSizePixelsY);
     m_printoutDC->SetUserScale(userScaleX, userScaleY);
     m_printoutDC->SetDeviceOrigin(0, 0);
 }
@@ -684,12 +685,12 @@ void wxPrintout::MapScreenSizeToDevice()
     // Set the DC scale so that a screen pixel is the same size as a device
     // pixel and the origin is at the top left of the printable area.
     if (!m_printoutDC) return;
-    int w, h; 
-    m_printoutDC->GetSize(&w, &h); 
-    int pageSizePixelsX, pageSizePixelsY; 
-    GetPageSizePixels(&pageSizePixelsX, &pageSizePixelsY); 
-    float userScaleX = float(w) / pageSizePixelsX; 
-    float userScaleY = float(h) / pageSizePixelsY; 
+    int w, h;
+    m_printoutDC->GetSize(&w, &h);
+    int pageSizePixelsX, pageSizePixelsY;
+    GetPageSizePixels(&pageSizePixelsX, &pageSizePixelsY);
+    float userScaleX = float(w) / pageSizePixelsX;
+    float userScaleY = float(h) / pageSizePixelsY;
     m_printoutDC->SetUserScale(userScaleX, userScaleY);
     m_printoutDC->SetDeviceOrigin(0, 0);
 }
@@ -705,17 +706,17 @@ wxRect wxPrintout::GetLogicalPaperRect() const
     m_printoutDC->GetSize(&w, &h);
     if (w == pw && h == ph) {
         // this DC matches the printed page, so no scaling
-        return wxRect(m_printoutDC->DeviceToLogicalX(paperRect.x), 
-            m_printoutDC->DeviceToLogicalY(paperRect.y), 
-            m_printoutDC->DeviceToLogicalXRel(paperRect.width), 
+        return wxRect(m_printoutDC->DeviceToLogicalX(paperRect.x),
+            m_printoutDC->DeviceToLogicalY(paperRect.y),
+            m_printoutDC->DeviceToLogicalXRel(paperRect.width),
             m_printoutDC->DeviceToLogicalYRel(paperRect.height));
     }
     // This DC doesn't match the printed page, so we have to scale.
     float scaleX = float(w) / pw;
     float scaleY = float(h) / ph;
-    return wxRect(m_printoutDC->DeviceToLogicalX(wxRound(paperRect.x * scaleX)), 
-        m_printoutDC->DeviceToLogicalY(wxRound(paperRect.y * scaleY)), 
-        m_printoutDC->DeviceToLogicalXRel(wxRound(paperRect.width * scaleX)), 
+    return wxRect(m_printoutDC->DeviceToLogicalX(wxRound(paperRect.x * scaleX)),
+        m_printoutDC->DeviceToLogicalY(wxRound(paperRect.y * scaleY)),
+        m_printoutDC->DeviceToLogicalXRel(wxRound(paperRect.width * scaleX)),
         m_printoutDC->DeviceToLogicalYRel(wxRound(paperRect.height * scaleY)));
 }
 
@@ -725,9 +726,9 @@ wxRect wxPrintout::GetLogicalPageRect() const
     // area.
     int w, h;
     m_printoutDC->GetSize(&w, &h);
-    return wxRect(m_printoutDC->DeviceToLogicalX(0), 
-        m_printoutDC->DeviceToLogicalY(0), 
-        m_printoutDC->DeviceToLogicalXRel(w), 
+    return wxRect(m_printoutDC->DeviceToLogicalX(0),
+        m_printoutDC->DeviceToLogicalY(0),
+        m_printoutDC->DeviceToLogicalXRel(w),
         m_printoutDC->DeviceToLogicalYRel(h));
 }
 
@@ -736,7 +737,7 @@ wxRect wxPrintout::GetLogicalPageMarginsRect(const wxPageSetupDialogData& pageSe
     // Return the rectangle in logical units that corresponds to the region
     // within the page margins as specified by the given wxPageSetupDialogData
     // object.
-    
+
     // We get the paper size in device units and the margins in mm,
     // so we need to calculate the conversion with this trick
     wxCoord pw, ph;
@@ -746,38 +747,38 @@ wxRect wxPrintout::GetLogicalPageMarginsRect(const wxPageSetupDialogData& pageSe
     float mmToDeviceX = float(pw) / mw;
     float mmToDeviceY = float(ph) / mh;
 
-    // paper size in device units    
+    // paper size in device units
     wxRect paperRect = GetPaperRectPixels();
-    
+
     // margins in mm
     wxPoint topLeft = pageSetupData.GetMarginTopLeft();
     wxPoint bottomRight = pageSetupData.GetMarginBottomRight();
-    
+
     // calculate margins in device units
     wxRect pageMarginsRect(
         paperRect.x      + wxRound(mmToDeviceX * topLeft.x),
         paperRect.y      + wxRound(mmToDeviceY * topLeft.y),
         paperRect.width  - wxRound(mmToDeviceX * (topLeft.x + bottomRight.x)),
         paperRect.height - wxRound(mmToDeviceY * (topLeft.y + bottomRight.y)));
-        
+
     wxCoord w, h;
     m_printoutDC->GetSize(&w, &h);
-    if (w == pw && h == ph) 
+    if (w == pw && h == ph)
     {
         // this DC matches the printed page, so no scaling
         return wxRect(
-            m_printoutDC->DeviceToLogicalX(pageMarginsRect.x), 
-            m_printoutDC->DeviceToLogicalY(pageMarginsRect.y), 
-            m_printoutDC->DeviceToLogicalXRel(pageMarginsRect.width), 
+            m_printoutDC->DeviceToLogicalX(pageMarginsRect.x),
+            m_printoutDC->DeviceToLogicalY(pageMarginsRect.y),
+            m_printoutDC->DeviceToLogicalXRel(pageMarginsRect.width),
             m_printoutDC->DeviceToLogicalYRel(pageMarginsRect.height));
     }
-    
+
     // This DC doesn't match the printed page, so we have to scale.
     float scaleX = float(w) / pw;
     float scaleY = float(h) / ph;
-    return wxRect(m_printoutDC->DeviceToLogicalX(wxRound(pageMarginsRect.x * scaleX)), 
-        m_printoutDC->DeviceToLogicalY(wxRound(pageMarginsRect.y * scaleY)), 
-        m_printoutDC->DeviceToLogicalXRel(wxRound(pageMarginsRect.width * scaleX)), 
+    return wxRect(m_printoutDC->DeviceToLogicalX(wxRound(pageMarginsRect.x * scaleX)),
+        m_printoutDC->DeviceToLogicalY(wxRound(pageMarginsRect.y * scaleY)),
+        m_printoutDC->DeviceToLogicalXRel(wxRound(pageMarginsRect.width * scaleX)),
         m_printoutDC->DeviceToLogicalYRel(wxRound(pageMarginsRect.height * scaleY)));
 }
 
@@ -785,19 +786,19 @@ void wxPrintout::SetLogicalOrigin(wxCoord x, wxCoord y)
 {
     // Set the device origin by specifying a point in logical coordinates.
     m_printoutDC->SetDeviceOrigin(
-        m_printoutDC->LogicalToDeviceX(x), 
+        m_printoutDC->LogicalToDeviceX(x),
         m_printoutDC->LogicalToDeviceY(y) );
 }
-    
+
 void wxPrintout::OffsetLogicalOrigin(wxCoord xoff, wxCoord yoff)
 {
     // Offset the device origin by a specified distance in device coordinates.
     wxPoint dev_org = m_printoutDC->GetDeviceOrigin();
     m_printoutDC->SetDeviceOrigin(
-        dev_org.x + m_printoutDC->LogicalToDeviceXRel(xoff), 
+        dev_org.x + m_printoutDC->LogicalToDeviceXRel(xoff),
         dev_org.y + m_printoutDC->LogicalToDeviceYRel(yoff) );
 }
-    
+
 
 //----------------------------------------------------------------------------
 // wxPreviewCanvas
@@ -808,6 +809,7 @@ IMPLEMENT_CLASS(wxPreviewCanvas, wxWindow)
 BEGIN_EVENT_TABLE(wxPreviewCanvas, wxScrolledWindow)
     EVT_PAINT(wxPreviewCanvas::OnPaint)
     EVT_CHAR(wxPreviewCanvas::OnChar)
+    EVT_IDLE(wxPreviewCanvas::OnIdle)
     EVT_SYS_COLOUR_CHANGED(wxPreviewCanvas::OnSysColourChanged)
 #if wxUSE_MOUSEWHEEL
     EVT_MOUSEWHEEL(wxPreviewCanvas::OnMouseWheel)
@@ -859,6 +861,25 @@ void wxPreviewCanvas::OnPaint(wxPaintEvent& WXUNUSED(event))
     }
 }
 
+void wxPreviewCanvas::OnIdle(wxIdleEvent& event)
+{
+    event.Skip();
+
+    // prevent UpdatePageRendering() from being called recursively:
+    static bool s_inIdle = false;
+    if ( s_inIdle )
+        return;
+    s_inIdle = true;
+
+    if ( m_printPreview )
+    {
+        if ( m_printPreview->UpdatePageRendering() )
+            Refresh();
+    }
+
+    s_inIdle = false;
+}
+
 // Responds to colour changes, and passes event on to children.
 void wxPreviewCanvas::OnSysColourChanged(wxSysColourChangedEvent& event)
 {
@@ -980,11 +1001,11 @@ wxPreviewControlBar::wxPreviewControlBar(wxPrintPreviewBase *preview, long butto
 wxPanel(parent, wxID_ANY, pos, size, style, name)
 {
     m_printPreview = preview;
-    m_closeButton = (wxButton *) NULL;
-    m_nextPageButton = (wxButton *) NULL;
-    m_previousPageButton = (wxButton *) NULL;
-    m_printButton = (wxButton *) NULL;
-    m_zoomControl = (wxChoice *) NULL;
+    m_closeButton = NULL;
+    m_nextPageButton = NULL;
+    m_previousPageButton = NULL;
+    m_printButton = NULL;
+    m_zoomControl = NULL;
     m_buttonFlags = buttons;
 }
 
@@ -1250,7 +1271,7 @@ wxFrame(parent, wxID_ANY, title, pos, size, style, name)
 #ifdef __WXMSW__
     wxFrame* topFrame = wxDynamicCast(wxTheApp->GetTopWindow(), wxFrame);
     if (topFrame)
-        SetIcon(topFrame->GetIcon());
+        SetIcons(topFrame->GetIcons());
 #endif
 }
 
@@ -1272,7 +1293,9 @@ void wxPreviewFrame::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
         m_printPreview->SetCanvas(NULL);
         m_printPreview->SetFrame(NULL);
     }
-    delete m_printPreview;
+
+    m_previewCanvas->SetPreview(NULL);
+    wxDELETE(m_printPreview);
 
     Destroy();
 }
@@ -1352,13 +1375,14 @@ void wxPrintPreviewBase::Init(wxPrintout *printout,
     m_isOk = true;
     m_previewPrintout = printout;
     if (m_previewPrintout)
-        m_previewPrintout->SetIsPreview(true);
+        m_previewPrintout->SetPreview(static_cast<wxPrintPreview *>(this));
 
     m_printPrintout = printoutForPrinting;
 
     m_previewCanvas = NULL;
     m_previewFrame = NULL;
     m_previewBitmap = NULL;
+    m_previewFailed = false;
     m_currentPage = 1;
     m_currentZoom = 70;
     m_topMargin = 40;
@@ -1386,18 +1410,13 @@ bool wxPrintPreviewBase::SetCurrentPage(int pageNum)
         return true;
 
     m_currentPage = pageNum;
-    if (m_previewBitmap)
-    {
-        delete m_previewBitmap;
-        m_previewBitmap = NULL;
-    }
+
+    InvalidatePreviewBitmap();
 
     if (m_previewCanvas)
     {
         AdjustScrollbars(m_previewCanvas);
 
-        if (!RenderPage(pageNum))
-            return false;
         m_previewCanvas->Refresh();
         m_previewCanvas->SetFocus();
     }
@@ -1454,13 +1473,35 @@ void wxPrintPreviewBase::CalcRects(wxPreviewCanvas *canvas, wxRect& pageRect, wx
 }
 
 
+void wxPrintPreviewBase::InvalidatePreviewBitmap()
+{
+    wxDELETE(m_previewBitmap);
+    // if there was a problem with rendering the preview, try again now
+    // that it changed in some way (less memory may be needed, for example):
+    m_previewFailed = false;
+}
+
+bool wxPrintPreviewBase::UpdatePageRendering()
+{
+    if ( m_previewBitmap )
+        return false;
+
+    if ( m_previewFailed )
+        return false;
+
+    if ( !RenderPage(m_currentPage) )
+    {
+        m_previewFailed = true; // don't waste time failing again
+        return false;
+    }
+
+    return true;
+}
+
 bool wxPrintPreviewBase::PaintPage(wxPreviewCanvas *canvas, wxDC& dc)
 {
     DrawBlankPage(canvas, dc);
 
-    if (!m_previewBitmap)
-        if (!RenderPage(m_currentPage))
-            return false;
     if (!m_previewBitmap)
         return false;
     if (!canvas)
@@ -1471,7 +1512,7 @@ bool wxPrintPreviewBase::PaintPage(wxPreviewCanvas *canvas, wxDC& dc)
     wxMemoryDC temp_dc;
     temp_dc.SelectObject(*m_previewBitmap);
 
-    dc.Blit(pageRect.x, pageRect.y, 
+    dc.Blit(pageRect.x, pageRect.y,
         m_previewBitmap->GetWidth(), m_previewBitmap->GetHeight(), &temp_dc, 0, 0);
 
     temp_dc.SelectObject(wxNullBitmap);
@@ -1495,13 +1536,54 @@ void wxPrintPreviewBase::AdjustScrollbars(wxPreviewCanvas *canvas)
         canvas->SetScrollbars(10, 10, scrollUnitsX, scrollUnitsY, 0, 0, true);
 }
 
+bool wxPrintPreviewBase::RenderPageIntoDC(wxDC& dc, int pageNum)
+{
+    m_previewPrintout->SetDC(&dc);
+    m_previewPrintout->SetPageSizePixels(m_pageWidth, m_pageHeight);
+
+    // Need to delay OnPreparePrinting() until here, so we have enough
+    // information.
+    if (!m_printingPrepared)
+    {
+        m_previewPrintout->OnPreparePrinting();
+        int selFrom, selTo;
+        m_previewPrintout->GetPageInfo(&m_minPage, &m_maxPage, &selFrom, &selTo);
+        m_printingPrepared = true;
+    }
+
+    m_previewPrintout->OnBeginPrinting();
+
+    if (!m_previewPrintout->OnBeginDocument(m_printDialogData.GetFromPage(), m_printDialogData.GetToPage()))
+    {
+        wxMessageBox(_("Could not start document preview."), _("Print Preview Failure"), wxOK);
+        return false;
+    }
+
+    m_previewPrintout->OnPrintPage(pageNum);
+    m_previewPrintout->OnEndDocument();
+    m_previewPrintout->OnEndPrinting();
+
+    m_previewPrintout->SetDC(NULL);
+
+    return true;
+}
+
+bool wxPrintPreviewBase::RenderPageIntoBitmap(wxBitmap& bmp, int pageNum)
+{
+    wxMemoryDC memoryDC;
+    memoryDC.SelectObject(bmp);
+    memoryDC.Clear();
+
+    return RenderPageIntoDC(memoryDC, pageNum);
+}
+
 bool wxPrintPreviewBase::RenderPage(int pageNum)
 {
     wxBusyCursor busy;
 
     if (!m_previewCanvas)
     {
-        wxFAIL_MSG(_T("wxPrintPreviewBase::RenderPage: must use wxPrintPreviewBase::SetCanvas to let me know about the canvas!"));
+        wxFAIL_MSG(wxT("wxPrintPreviewBase::RenderPage: must use wxPrintPreviewBase::SetCanvas to let me know about the canvas!"));
         return false;
     }
 
@@ -1514,53 +1596,19 @@ bool wxPrintPreviewBase::RenderPage(int pageNum)
 
         if (!m_previewBitmap || !m_previewBitmap->Ok())
         {
-            if (m_previewBitmap) {
-                delete m_previewBitmap;
-                m_previewBitmap = NULL;
-            }
+            InvalidatePreviewBitmap();
             wxMessageBox(_("Sorry, not enough memory to create a preview."), _("Print Preview Failure"), wxOK);
             return false;
         }
     }
 
-    wxMemoryDC memoryDC;
-    memoryDC.SelectObject(*m_previewBitmap);
-
-    memoryDC.Clear();
-
-    m_previewPrintout->SetDC(&memoryDC);
-    m_previewPrintout->SetPageSizePixels(m_pageWidth, m_pageHeight);
-
-    // Need to delay OnPreparePrinting until here, so we have enough information.
-    if (!m_printingPrepared)
-    {
-        m_previewPrintout->OnPreparePrinting();
-        int selFrom, selTo;
-        m_previewPrintout->GetPageInfo(&m_minPage, &m_maxPage, &selFrom, &selTo);
-        m_printingPrepared = true;
-    }
-
-    m_previewPrintout->OnBeginPrinting();
-
-    if (!m_previewPrintout->OnBeginDocument(m_printDialogData.GetFromPage(), m_printDialogData.GetToPage()))
+    if ( !RenderPageIntoBitmap(*m_previewBitmap, pageNum) )
     {
-        wxMessageBox(_("Could not start document preview."), _("Print Preview Failure"), wxOK);
-
-        memoryDC.SelectObject(wxNullBitmap);
-
-        delete m_previewBitmap;
-        m_previewBitmap = NULL;
+        InvalidatePreviewBitmap();
+        wxMessageBox(_("Sorry, not enough memory to create a preview."), _("Print Preview Failure"), wxOK);
         return false;
     }
 
-    m_previewPrintout->OnPrintPage(pageNum);
-    m_previewPrintout->OnEndDocument();
-    m_previewPrintout->OnEndPrinting();
-
-    m_previewPrintout->SetDC(NULL);
-
-    memoryDC.SelectObject(wxNullBitmap);
-
 #if wxUSE_STATUSBAR
     wxString status;
     if (m_maxPage != 0)
@@ -1595,7 +1643,7 @@ bool wxPrintPreviewBase::DrawBlankPage(wxPreviewCanvas *canvas, wxDC& dc)
     // Draw blank page allowing for 1-pixel border AROUND the actual paper
     dc.SetPen(*wxBLACK_PEN);
     dc.SetBrush(*wxWHITE_BRUSH);
-    dc.DrawRectangle(paperRect.x - 2, paperRect.y - 1, 
+    dc.DrawRectangle(paperRect.x - 2, paperRect.y - 1,
         paperRect.width + 3, paperRect.height + 2);
 
     return true;
@@ -1607,16 +1655,12 @@ void wxPrintPreviewBase::SetZoom(int percent)
         return;
 
     m_currentZoom = percent;
-    if (m_previewBitmap)
-    {
-        delete m_previewBitmap;
-        m_previewBitmap = NULL;
-    }
+
+    InvalidatePreviewBitmap();
 
     if (m_previewCanvas)
     {
         AdjustScrollbars(m_previewCanvas);
-        RenderPage(m_currentPage);
         ((wxScrolledWindow *) m_previewCanvas)->Scroll(0, 0);
         m_previewCanvas->ClearBackground();
         m_previewCanvas->Refresh();
@@ -1724,6 +1768,11 @@ bool wxPrintPreview::PaintPage(wxPreviewCanvas *canvas, wxDC& dc)
     return m_pimpl->PaintPage( canvas, dc );
 }
 
+bool wxPrintPreview::UpdatePageRendering()
+{
+    return m_pimpl->UpdatePageRendering();
+}
+
 bool wxPrintPreview::DrawBlankPage(wxPreviewCanvas *canvas, wxDC& dc)
 {
     return m_pimpl->DrawBlankPage( canvas, dc );