canvas/source/vcl/windowoutdevholder.hxx

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  30
  31 #ifndef _VCLCANVAS_WINDOWOUTDEVHOLDER_HXX
  32 #define _VCLCANVAS_WINDOWOUTDEVHOLDER_HXX
  33
  34 #include <com/sun/star/uno/Reference.hxx>
  35 #include <com/sun/star/awt/XWindow.hpp>
  36 #include <vcl/window.hxx>
  37
  38 #include "outdevprovider.hxx"
  39
  40 #include <boost/utility.hpp>
  41
  42 namespace vclcanvas
  43 {
  44     class WindowOutDevHolder : public OutDevProvider,
  45                                private ::boost::noncopyable
  46     {
  47     public:
  48         explicit WindowOutDevHolder( const ::com::sun::star::uno::Reference<
  49                                            ::com::sun::star::awt::XWindow>& xWin );
  50
  51     private:
  52         virtual OutputDevice&           getOutDev() { return mrOutputWindow; }
  53         virtual const OutputDevice& getOutDev() const { return mrOutputWindow; }
  54
  55         // TODO(Q2): Lifetime issue. Though WindowGraphicDeviceBase
  56         // now listenes to the window component, I still consider
  57         // holding a naked reference unsafe here (especially as we
  58         // pass it around via getOutDev). This _only_ works reliably,
  59         // if disposing the SpriteCanvas correctly disposes all
  60         // entities which hold this pointer.
  61         // So: as soon as the protocol inside
  62         // vcl/source/window/window.cxx is broken, that disposes the
  63         // canvas during window deletion, we're riding a dead horse
  64         // here
  65         Window& mrOutputWindow;
  66     };
  67 }
  68
  69 #endif /* _VCLCANVAS_WINDOWOUTDEVHOLDER_HXX */