canvas/source/vcl/windowoutdevholder.hxx

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