LibreOffice Module canvas (master)  1
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 {
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; }
40  virtual const OutputDevice& getOutDev() const override { return mrOutputWindow; }
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
53  };
54 }
55 
56 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
const WindowOutDevHolder operator=(const WindowOutDevHolder &)=delete
virtual const OutputDevice & getOutDev() const override
WindowOutDevHolder(const WindowOutDevHolder &)=delete
Implementers of this interface provide the CanvasHelper with its OutputDevice.
virtual OutputDevice & getOutDev() override