sdext/source/presenter/PresenterTimer.hxx

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  31
  32 #ifndef SDEXT_PRESENTER_TIMER_HXX
  33 #define SDEXT_PRESENTER_TIMER_HXX
  34
  35 #include <com/sun/star/awt/XCallback.hpp>
  36 #include <com/sun/star/awt/XRequestCallback.hpp>
  37 #include <cppuhelper/basemutex.hxx>
  38 #include <cppuhelper/compbase1.hxx>
  39 #include <osl/mutex.hxx>
  40 #include <osl/time.h>
  41 #include <rtl/ref.hxx>
  42 #include <sal/types.h>
  43 #include <boost/enable_shared_from_this.hpp>
  44 #include <boost/function.hpp>
  45 #include <vector>
  46
  47 namespace css = ::com::sun::star;
  48
  49 namespace sdext { namespace presenter {
  50
  51 class PresenterClockInternalTimer;
  52
  53 /** The timer allows tasks to be scheduled for execution at a specified time
  54     in the future.
  55 */
  56 class PresenterTimer
  57 {
  58 public:
  59     /** A task is called with the current time.
  60     */
  61     typedef ::boost::function<void(const TimeValue&)> Task;
  62
  63     static const sal_Int32 NotAValidTaskId = 0;
  64
  65     static sal_Int32 ScheduleSingleTaskRelative (
  66         const Task& rTask,
  67         const sal_Int64 nDelay);
  68
  69     static sal_Int32 ScheduleSingleTaskAbsolute (
  70         const Task& rTask,
  71         const TimeValue& rDueTime);
  72
  73     static sal_Int32 ScheduleRepeatedTask (
  74         const Task& rTask,
  75         const sal_Int64 nFirst,
  76         const sal_Int64 nIntervall);
  77
  78     static void CancelTask (const sal_Int32 nTaskId);
  79 };
  80
  81
  82
  83 typedef cppu::WeakComponentImplHelper1<
  84     css::awt::XCallback
  85     > PresenterClockTimerInterfaceBase;
  86
  87 /** A timer that calls its listeners, typically clocks, every second to
  88     update their current time value.
  89 */
  90 class PresenterClockTimer
  91     : protected ::cppu::BaseMutex,
  92       public PresenterClockTimerInterfaceBase
  93 {
  94 public:
  95     class Listener { public:
  96         virtual void TimeHasChanged (const oslDateTime& rCurrentTime) = 0;
  97     };
  98     typedef ::boost::shared_ptr<Listener> SharedListener;
  99
 100     static ::rtl::Reference<PresenterClockTimer> Instance (
 101         const css::uno::Reference<css::uno::XComponentContext>& rxContext);
 102
 103     void AddListener (const SharedListener& rListener);
 104     void RemoveListener (const SharedListener& rListener);
 105
 106     static oslDateTime GetCurrentTime (void);
 107
 108     /** Return the difference between the two different times in
 109         nanoseconds.
 110     */
 111     static sal_Int64 GetTimeDifference (const oslDateTime& rNow, const oslDateTime& rThen);
 112
 113     // XCallback
 114
 115     virtual void SAL_CALL notify (const css::uno::Any& rUserData)
 116         throw (css::uno::RuntimeException);
 117
 118 private:
 119     static ::rtl::Reference<PresenterClockTimer> mpInstance;
 120
 121     ::osl::Mutex maMutex;
 122     typedef ::std::vector<SharedListener> ListenerContainer;
 123     ListenerContainer maListeners;
 124     oslDateTime maDateTime;
 125     sal_Int32 mnTimerTaskId;
 126     bool mbIsCallbackPending;
 127     css::uno::Reference<css::awt::XRequestCallback> mxRequestCallback;
 128
 129     PresenterClockTimer (
 130         const css::uno::Reference<css::uno::XComponentContext>& rxContext);
 131     ~PresenterClockTimer (void);
 132
 133     void CheckCurrentTime (const TimeValue& rCurrentTime);
 134 };
 135
 136
 137
 138
 139
 140 } } // end of namespace ::sdext::presenter
 141
 142 #endif