src/gtk/timer.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        gtk/timer.cpp
   3 // Purpose:     wxTimer implementation
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #if wxUSE_TIMER
  14
  15 #include "wx/gtk/private/timer.h"
  16
  17 #include <gtk/gtk.h>
  18
  19 // ----------------------------------------------------------------------------
  20 // wxTimerImpl
  21 // ----------------------------------------------------------------------------
  22
  23 extern "C" {
  24
  25 static gboolean timeout_callback(gpointer data)
  26 {
  27     wxGTKTimerImpl *timer = (wxGTKTimerImpl*)data;
  28
  29     const bool keepGoing = !timer->IsOneShot();
  30     if ( !keepGoing )
  31         timer->Stop();
  32
  33     // When getting called from GDK's timer handler we
  34     // are no longer within GDK's grab on the GUI
  35     // thread so we must lock it here ourselves.
  36     gdk_threads_enter();
  37
  38     timer->Notify();
  39
  40     // Release lock again.
  41     gdk_threads_leave();
  42
  43     return keepGoing;
  44 }
  45
  46 } // extern "C"
  47
  48 bool wxGTKTimerImpl::Start(int millisecs, bool oneShot)
  49 {
  50     if ( !wxTimerImpl::Start(millisecs, oneShot) )
  51         return false;
  52
  53     wxASSERT_MSG( !m_sourceId, _T("shouldn't be still running") );
  54
  55     m_sourceId = g_timeout_add(m_milli, timeout_callback, this);
  56
  57     return true;
  58 }
  59
  60 void wxGTKTimerImpl::Stop()
  61 {
  62     wxASSERT_MSG( m_sourceId, _T("should be running") );
  63
  64     g_source_remove(m_sourceId);
  65     m_sourceId = 0;
  66 }
  67
  68 #endif // wxUSE_TIMER
  69