reset preview bitmap variable to NULL after deleting it

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@10689 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/common/prntbase.cpp b/src/common/prntbase.cpp
index bbbcefc57dc87ceced9fcc4bdfaaa47b5a3cb417..8e7e80b76929dc40fe1778d31c59e0a66ed059e4 100644 (file)
--- a/src/common/prntbase.cpp
+++ b/src/common/prntbase.cpp
@@ -612,7 +612,8 @@ bool wxPrintPreviewBase::SetCurrentPage(int pageNum)
 
     if (m_previewCanvas)
     {
 
     if (m_previewCanvas)
     {

-        RenderPage(pageNum);
+        if (!RenderPage(pageNum))
+               return FALSE;

         m_previewCanvas->Refresh();
     }
     return TRUE;
         m_previewCanvas->Refresh();
     }
     return TRUE;


@@ -623,7 +624,8 @@ bool wxPrintPreviewBase::PaintPage(wxWindow *canvas, wxDC& dc)
     DrawBlankPage(canvas, dc);
 
     if (!m_previewBitmap)
     DrawBlankPage(canvas, dc);
 
     if (!m_previewBitmap)

-        RenderPage(m_currentPage);
+        if (!RenderPage(m_currentPage))
+               return FALSE;

 
     if (!m_previewBitmap)
         return FALSE;
 
     if (!m_previewBitmap)
         return FALSE;


@@ -682,8 +684,10 @@ bool wxPrintPreviewBase::RenderPage(int pageNum)
         m_previewBitmap = new wxBitmap((int)actualWidth, (int)actualHeight);
         if (!m_previewBitmap || !m_previewBitmap->Ok())
         {
         m_previewBitmap = new wxBitmap((int)actualWidth, (int)actualHeight);
         if (!m_previewBitmap || !m_previewBitmap->Ok())
         {

-            if (m_previewBitmap)
+            if (m_previewBitmap) {

                 delete m_previewBitmap;
                 delete m_previewBitmap;

+                m_previewBitmap = NULL;
+            }

             wxMessageBox(_("Sorry, not enough memory to create a preview."), _("Print Preview Failure"), wxOK);
             return FALSE;
         }
             wxMessageBox(_("Sorry, not enough memory to create a preview."), _("Print Preview Failure"), wxOK);
             return FALSE;
         }


@@ -713,6 +717,7 @@ bool wxPrintPreviewBase::RenderPage(int pageNum)
         memoryDC.SelectObject(wxNullBitmap);
 
         delete m_previewBitmap;
         memoryDC.SelectObject(wxNullBitmap);
 
         delete m_previewBitmap;

+        m_previewBitmap = NULL;

         return FALSE;
     }
 
         return FALSE;
     }