Category

Development Platform
Home > SourceCode/Document > Communication-Mobile > Symbian > View Code
chxavactivewatcher.h
Package: 142_61_thumb_advanced.rar　[view]
Upload User: dangjiwu
Upload Date: 2013-07-19
Package Size: 42019k
Code Size: 2k
Category:

Symbian

Development Platform:

Visual C++

chxavactivewatcher.h：Code Content
  1. /************************************************************************
  2.  * chxavactivewatcher.h
  3.  * --------------------
  4.  *
  5.  * Synopsis:
  6.  *
  7.  * base class for classes that request active object
  8.  * event notification from system services
  9.  *
  10.  *
  11.  *
  12.  * (c) 1995-2003 RealNetworks, Inc. Patents pending. All rights reserved.
  13.  *
  14.  ************************************************************************/ 
  15. #ifndef _chxavactivewatcher_h_
  16. #define _chxavactivewatcher_h_
  18. // Include from this project...
  19. #include "chxavcommand.h"
  20. #include "chxavactivecompletiondispatch.h"
  21. #include "chxavcallback.h"
  24. // class CHXAvActiveWatcher
  25. class CHXAvActiveWatcher
  26. {
  27. protected:
  28. // ctor and dtor
  29.     CHXAvActiveWatcher();
  30.     virtual ~CHXAvActiveWatcher();
  32.     void BaseConstructL(TInt activePriority = CActive::EPriorityStandard);
  34. private:
  35. // disallow assignment and copy
  36.     CHXAvActiveWatcher(const CHXAvActiveWatcher& rhs);
  37.     CHXAvActiveWatcher& operator=(const CHXAvActiveWatcher& rhs);
  39. public:
  40. // methods
  41.     void SetEventActionL(const CHXAvCommand& cmd);
  42.     void SetNotificationDelay(TUint msDelay);
  43.     void WatchForNextEvent();
  44.     void StartWatching();
  45.     void StopWatching();
  46.     bool IsWatching() const;
  48. protected:
  49. // implementation
  50.     virtual void OnEvent(TInt status);
  51.     virtual void OnCancelWatch(TInt status);
  52.     virtual void ForwardEvent();
  54.     virtual void DoIssueRequest(const CHXAvActiveCmplPtr& spActive) = 0;
  55.     virtual void DoCancelRequest(const CHXAvActiveCmplPtr& spActive) = 0;
  57. private:
  58. // data
  59.     CHXAvActiveCmplPtr m_spWatchObject;
  60.     bool m_bKeepWatching;
  61.     CHXAvCommandPtr m_spEventHandler;
  62.     CHXAvCallback          m_cbFowardEvent;
  63.     TUint               m_msForwardEventDelay;
  64. };
  66. ////////////////////////////////////////////
  67. // set the handler action to execute upon filesystem event
  68. inline
  69. void CHXAvActiveWatcher::SetEventActionL(const CHXAvCommand& cmd)
  70. {
  71.     m_spEventHandler = cmd.CloneL();
  72. }
  74. ////////////////////////////////////////////
  75. //
  76. inline
  77. bool CHXAvActiveWatcher::IsWatching() const
  78. {
  79.     return m_spWatchObject->IsActive() || m_cbFowardEvent.IsPending();
  80. }
  82. ////////////////////////////////////////////
  83. //
  84. inline
  85. void CHXAvActiveWatcher::SetNotificationDelay(TUint msDelay)
  86. {
  87.     m_msForwardEventDelay = msDelay;
  88. }
  90. #endif // _chxavactivewatcher_h_