canvas/source/vcl/windowoutdevholder.hxx

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  19
  20 #ifndef INCLUDED_CANVAS_SOURCE_VCL_WINDOWOUTDEVHOLDER_HXX
  21 #define INCLUDED_CANVAS_SOURCE_VCL_WINDOWOUTDEVHOLDER_HXX
  22
  23 #include <com/sun/star/uno/Reference.hxx>
  24 #include <com/sun/star/awt/XWindow.hpp>
  25 #include <vcl/window.hxx>
  26
  27 #include "outdevprovider.hxx"
  28
  29 #include <boost/utility.hpp>
  30
  31 namespace vclcanvas
  32 {
  33     class WindowOutDevHolder : public OutDevProvider,
  34                                private ::boost::noncopyable
  35     {
  36     public:
  37         explicit WindowOutDevHolder( const ::com::sun::star::uno::Reference<
  38                                            ::com::sun::star::awt::XWindow>& xWin );
  39
  40     private:
  41         virtual OutputDevice&       getOutDev() SAL_OVERRIDE { return mrOutputWindow; }
  42         virtual const OutputDevice& getOutDev() const SAL_OVERRIDE { return mrOutputWindow; }
  43
  44         // TODO(Q2): Lifetime issue. Though WindowGraphicDeviceBase
  45         // now listenes to the window component, I still consider
  46         // holding a naked reference unsafe here (especially as we
  47         // pass it around via getOutDev). This _only_ works reliably,
  48         // if disposing the SpriteCanvas correctly disposes all
  49         // entities which hold this pointer.
  50         // So: as soon as the protocol inside
  51         // vcl/source/window/window.cxx is broken, that disposes the
  52         // canvas during window deletion, we're riding a dead horse
  53         // here
  54         vcl::Window& mrOutputWindow;
  55     };
  56 }
  57
  58 #endif // INCLUDED_CANVAS_SOURCE_VCL_WINDOWOUTDEVHOLDER_HXX
  59
  60 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */