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21 
22 
23 
24 #ifndef SD_PRESENTER_CANVAS_UPDATE_REQUESTER_HEADER
25 #define SD_PRESENTER_CANVAS_UPDATE_REQUESTER_HEADER
26 
27 #include "precompiled_sd.hxx"
28 
29 #include <com/sun/star/rendering/XSpriteCanvas.hpp>
30 #include <boost/noncopyable.hpp>
31 #include <boost/shared_ptr.hpp>
32 #include <sal/types.h>
33 #include <tools/solar.h>
34 #include <tools/link.hxx>
35 #include <vector>
36 
37 namespace css = ::com::sun::star;
38 
39 namespace sd { namespace presenter {
40 
41 /** Each UpdateRequester handles update requests (calls to
42     XCanvas::updateScreen()) for one shared canvas (a canvas that has one or
43     more PresenterCanvas wrappers).  Multiple calls are collected and lead
44     to a single call to updateScreen.
45 */
46 class CanvasUpdateRequester : private ::boost::noncopyable
47 {
48 public:
49     /** Return the Canvas UpdateRequester object for the given shared
50         canvas.  A new object is created when it does not already exist.
51     */
52     static ::boost::shared_ptr<CanvasUpdateRequester> Instance (
53         const css::uno::Reference<css::rendering::XSpriteCanvas>& rxCanvas);
54 
55     void RequestUpdate (const sal_Bool bUpdateAll);
56 
57 private:
58     CanvasUpdateRequester (const css::uno::Reference<css::rendering::XSpriteCanvas>& rxCanvas);
59     ~CanvasUpdateRequester (void);
60     class Deleter; friend class Deleter;
61 
62     typedef ::std::vector<
63         ::std::pair<
64             css::uno::Reference<css::rendering::XSpriteCanvas>,
65            ::boost::shared_ptr<CanvasUpdateRequester> > > RequesterMap;
66     static RequesterMap maRequesterMap;
67 
68     css::uno::Reference<css::rendering::XSpriteCanvas> mxCanvas;
69     sal_uLong mnUserEventId;
70     sal_Bool mbUpdateFlag;
71     DECL_LINK(Callback, void*);
72 };
73 
74 } } // end of namespace ::sd::presenter
75 
76 #endif
77