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 #include "wx/app.h"
  17
  18 #include <gtk/gtk.h>
  19
  20 // ----------------------------------------------------------------------------
  21 // wxTimerImpl
  22 // ----------------------------------------------------------------------------
  23
  24 extern "C" {
  25
  26 static gboolean timeout_callback(gpointer data)
  27 {
  28     wxGTKTimerImpl *timer = (wxGTKTimerImpl*)data;
  29
  30     const bool keepGoing = !timer->IsOneShot();
  31     if ( !keepGoing )
  32         timer->Stop();
  33
  34     // When getting called from GDK's timer handler we
  35     // are no longer within GDK's grab on the GUI
  36     // thread so we must lock it here ourselves.
  37     gdk_threads_enter();
  38
  39     timer->Notify();
  40
  41     // Release lock again.
  42     gdk_threads_leave();
  43
  44     wxApp* app = wxTheApp;
  45     if (app)
  46         app->WakeUpIdle();
  47
  48     return keepGoing;
  49 }
  50
  51 } // extern "C"
  52
  53 bool wxGTKTimerImpl::Start(int millisecs, bool oneShot)
  54 {
  55     if ( !wxTimerImpl::Start(millisecs, oneShot) )
  56         return false;
  57
  58     wxASSERT_MSG( !m_sourceId, wxT("shouldn't be still running") );
  59
  60     m_sourceId = g_timeout_add(m_milli, timeout_callback, this);
  61
  62     return true;
  63 }
  64
  65 void wxGTKTimerImpl::Stop()
  66 {
  67     wxASSERT_MSG( m_sourceId, wxT("should be running") );
  68
  69     g_source_remove(m_sourceId);
  70     m_sourceId = 0;
  71 }
  72
  73 #endif // wxUSE_TIMER
  74