include/wx/unix/evtloop.h

   1     ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/unix/evtloop.h
   3 // Purpose:     declares wxEventLoop class
   4 // Author:      Lukasz Michalski (lm@zork.pl)
   5 // Created:     2007-05-07
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2007 Lukasz Michalski
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef _WX_UNIX_EVTLOOP_H_
  12 #define _WX_UNIX_EVTLOOP_H_
  13
  14 #if wxUSE_CONSOLE_EVENTLOOP
  15
  16 // ----------------------------------------------------------------------------
  17 // wxConsoleEventLoop
  18 // ----------------------------------------------------------------------------
  19
  20 class wxFDIODispatcher;
  21
  22 namespace wxPrivate
  23 {
  24     class PipeIOHandler;
  25 }
  26
  27 class WXDLLIMPEXP_BASE wxConsoleEventLoop : public wxEventLoopManual
  28 {
  29 public:
  30     typedef wxUnixEventLoopSource Source;
  31
  32     // initialize the event loop, use IsOk() to check if we were successful
  33     wxConsoleEventLoop();
  34     virtual ~wxConsoleEventLoop();
  35
  36     // implement base class pure virtuals
  37     virtual bool Pending() const;
  38     virtual bool Dispatch();
  39     virtual int DispatchTimeout(unsigned long timeout);
  40     virtual void WakeUp();
  41     virtual bool IsOk() const { return m_dispatcher != NULL; }
  42     virtual bool YieldFor(long WXUNUSED(eventsToProcess)) { return true; }
  43
  44 #if wxUSE_EVENTLOOP_SOURCE
  45     virtual wxUnixEventLoopSource* CreateSource() const
  46     {
  47         return new wxUnixEventLoopSource();
  48     }
  49
  50     virtual wxUnixEventLoopSource* CreateSource(int res,
  51                                            wxEventLoopSourceHandler* handler,
  52                                            int flags) const
  53     {
  54         return new wxUnixEventLoopSource(res, handler, flags);
  55     }
  56 #endif
  57
  58 protected:
  59 #if wxUSE_EVENTLOOP_SOURCE
  60     // adding/removing sources
  61     virtual bool DoAddSource(wxAbstractEventLoopSource* source);
  62     virtual bool DoRemoveSource(wxAbstractEventLoopSource* source);
  63 #endif
  64
  65     virtual void OnNextIteration();
  66
  67 private:
  68     // pipe used for wake up messages: when a child thread wants to wake up
  69     // the event loop in the main thread it writes to this pipe
  70     wxPrivate::PipeIOHandler *m_wakeupPipe;
  71
  72     // either wxSelectDispatcher or wxEpollDispatcher
  73     wxFDIODispatcher *m_dispatcher;
  74
  75     wxDECLARE_NO_COPY_CLASS(wxConsoleEventLoop);
  76 };
  77
  78 #endif // wxUSE_CONSOLE_EVENTLOOP
  79
  80 #endif // _WX_UNIX_EVTLOOP_H_