src/gtk/timer.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/timer.cpp
   3 // Purpose:     wxTimer implementation
   4 // Author:      Robert Roebling
   5 // Copyright:   (c) 1998 Robert Roebling
   6 // Licence:     wxWindows licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 // For compilers that support precompilation, includes "wx.h".
  10 #include "wx/wxprec.h"
  11
  12 #if wxUSE_TIMER
  13
  14 #include "wx/gtk/private/timer.h"
  15 #include "wx/app.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     wxApp* app = wxTheApp;
  44     if (app)
  45         app->WakeUpIdle();
  46
  47     return keepGoing;
  48 }
  49
  50 } // extern "C"
  51
  52 bool wxGTKTimerImpl::Start(int millisecs, bool oneShot)
  53 {
  54     if ( !wxTimerImpl::Start(millisecs, oneShot) )
  55         return false;
  56
  57     wxASSERT_MSG( !m_sourceId, wxT("shouldn't be still running") );
  58
  59     m_sourceId = g_timeout_add(m_milli, timeout_callback, this);
  60
  61     return true;
  62 }
  63
  64 void wxGTKTimerImpl::Stop()
  65 {
  66     wxASSERT_MSG( m_sourceId, wxT("should be running") );
  67
  68     g_source_remove(m_sourceId);
  69     m_sourceId = 0;
  70 }
  71
  72 #endif // wxUSE_TIMER
  73