X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c933e267beed72a1c535c8d30ac930fc80587add..4954ee50328dc010ec3c934fd6deeab08c4447d6:/src/common/prntbase.cpp

diff --git a/src/common/prntbase.cpp b/src/common/prntbase.cpp
index e70b4f0b4c..4da0d2fa96 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 );
@@ -808,6 +808,7 @@ 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 +860,25 @@ 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)
 {
@@ -1272,7 +1292,9 @@ 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();
 }
@@ -1359,6 +1381,7 @@ void wxPrintPreviewBase::Init(wxPrintout *printout,
     m_previewCanvas = NULL;
     m_previewFrame = NULL;
     m_previewBitmap = NULL;
+    m_previewFailed = false;
     m_currentPage = 1;
     m_currentZoom = 70;
     m_topMargin = 40;
@@ -1386,18 +1409,13 @@ 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 +1472,35 @@ 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)
@@ -1495,6 +1535,47 @@ 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;
@@ -1514,53 +1595,19 @@ 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)
@@ -1607,16 +1654,12 @@ 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 +1767,11 @@ 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 );