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
  11 #ifdef __GNUG__
  12 #pragma implementation "timer.h"
  13 #endif
  14
  15 #include "wx/defs.h"
  16
  17 #if wxUSE_TIMER
  18
  19 #include "wx/timer.h"
  20
  21 #include "gtk/gtk.h"
  22
  23 // ----------------------------------------------------------------------------
  24 // wxTimer
  25 // ----------------------------------------------------------------------------
  26
  27 IMPLEMENT_ABSTRACT_CLASS(wxTimer, wxObject)
  28
  29 extern "C" gint timeout_callback( gpointer data )
  30 {
  31     wxTimer *timer = (wxTimer*)data;
  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     if ( timer->IsOneShot() )
  44         return FALSE;
  45
  46     return TRUE;
  47 }
  48
  49 void wxTimer::Init()
  50 {
  51     m_tag = -1;
  52     m_milli = 1000;
  53 }
  54
  55 wxTimer::~wxTimer()
  56 {
  57     wxTimer::Stop();
  58 }
  59
  60 bool wxTimer::Start( int millisecs, bool oneShot )
  61 {
  62     (void)wxTimerBase::Start(millisecs, oneShot);
  63
  64     if (m_tag != -1)
  65         gtk_timeout_remove( m_tag );
  66
  67     m_tag = gtk_timeout_add( m_milli, timeout_callback, this );
  68
  69     return TRUE;
  70 }
  71
  72 void wxTimer::Stop()
  73 {
  74     if (m_tag != -1)
  75     {
  76         gtk_timeout_remove( m_tag );
  77         m_tag = -1;
  78     }
  79 }
  80
  81 #endif // wxUSE_TIMER
  82