src/gtk1/timer.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/timer.cpp
   3 // Purpose:     wxTimer implementation
   4 // Author:      Robert Roebling
   5 // Copyright:   (c) 1998 Robert Roebling
   6 // Licence:     wxWindows licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 #include "wx/wxprec.h"
  10
  11 #if wxUSE_TIMER
  12
  13 #include "wx/gtk1/private/timer.h"
  14
  15 #include "gtk/gtk.h"
  16
  17 // ----------------------------------------------------------------------------
  18 // wxTimer
  19 // ----------------------------------------------------------------------------
  20
  21 extern "C" {
  22 static gint timeout_callback(void *data)
  23 {
  24     wxTimerImpl * const timer = (wxTimerImpl *)data;
  25
  26     const bool keepGoing = !timer->IsOneShot();
  27     if ( !keepGoing )
  28         timer->Stop();
  29
  30     // When getting called from GDK's timer handler we
  31     // are no longer within GDK's grab on the GUI
  32     // thread so we must lock it here ourselves.
  33     gdk_threads_enter();
  34
  35     timer->Notify();
  36
  37     // Release lock again.
  38     gdk_threads_leave();
  39
  40     return keepGoing;
  41 }
  42 }
  43
  44 bool wxGTKTimerImpl::Start(int millisecs, bool oneShot)
  45 {
  46     if ( !wxTimerImpl::Start(millisecs, oneShot) )
  47         return false;
  48
  49     wxASSERT_MSG( m_tag == -1, wxT("shouldn't be still running") );
  50
  51     m_tag = gtk_timeout_add( m_milli, timeout_callback, this );
  52
  53     return true;
  54 }
  55
  56 void wxGTKTimerImpl::Stop()
  57 {
  58     wxASSERT_MSG( m_tag != -1, wxT("should be running") );
  59
  60     gtk_timeout_remove( m_tag );
  61     m_tag = -1;
  62 }
  63
  64 #endif // wxUSE_TIMER
  65