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Avoid crash when trying to access m_window from wxScreenDC.

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@43605 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Kevin Ollivier
2006-11-22 19:54:38 +00:00
parent dee1a629b6
commit 90b0f5fced
1 changed files with 5 additions and 0 deletions
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5
src/mac/carbon/dcclient.cpp
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@@ -191,6 +191,11 @@ void wxWindowDC::DoGetSize( int* width, int* height ) const
wxBitmap wxWindowDC::DoGetAsBitmap(const wxRect *subrect) const wxBitmap wxWindowDC::DoGetAsBitmap(const wxRect *subrect) const
{ {
// wxScreenDC is derived from wxWindowDC, so a screen dc will
// call this method when a Blit is performed with it as a source.
if (!m_window)
return wxNullBitmap;
ControlRef handle = (ControlRef) m_window->GetHandle(); ControlRef handle = (ControlRef) m_window->GetHandle();
if ( !handle ) if ( !handle )
return wxNullBitmap; return wxNullBitmap;