src/gtk1/timer.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/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 #include "wx/wxprec.h"
  11
  12 #if wxUSE_TIMER
  13
  14 #include "wx/gtk1/private/timer.h"
  15
  16 #include "gtk/gtk.h"
  17
  18 // ----------------------------------------------------------------------------
  19 // wxTimer
  20 // ----------------------------------------------------------------------------
  21
  22 extern "C" {
  23 static gint timeout_callback(void *data)
  24 {
  25     wxTimerImpl * const timer = (wxTimerImpl *)data;
  26
  27     const bool keepGoing = !timer->IsOneShot();
  28     if ( !keepGoing )
  29         timer->Stop();
  30
  31     // When getting called from GDK's timer handler we
  32     // are no longer within GDK's grab on the GUI
  33     // thread so we must lock it here ourselves.
  34     gdk_threads_enter();
  35
  36     timer->Notify();
  37
  38     // Release lock again.
  39     gdk_threads_leave();
  40
  41     return keepGoing;
  42 }
  43 }
  44
  45 bool wxGTKTimerImpl::Start(int millisecs, bool oneShot)
  46 {
  47     if ( !wxTimerImpl::Start(millisecs, oneShot) )
  48         return false;
  49
  50     wxASSERT_MSG( m_tag == -1, wxT("shouldn't be still running") );
  51
  52     m_tag = gtk_timeout_add( m_milli, timeout_callback, this );
  53
  54     return true;
  55 }
  56
  57 void wxGTKTimerImpl::Stop()
  58 {
  59     wxASSERT_MSG( m_tag != -1, wxT("should be running") );
  60
  61     gtk_timeout_remove( m_tag );
  62     m_tag = -1;
  63 }
  64
  65 #endif // wxUSE_TIMER
  66