src/gtk/timer.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        gtk/timer.cpp
   3 // Purpose:
   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/timer.h"
  16
  17 #include "gtk/gtk.h"
  18
  19 //-----------------------------------------------------------------------------
  20 // wxTimer
  21 //-----------------------------------------------------------------------------
  22
  23 IMPLEMENT_ABSTRACT_CLASS(wxTimer,wxObject)
  24
  25 static gint timeout_callback( gpointer data )
  26 {
  27     wxTimer *timer = (wxTimer*)data;
  28
  29     /* when getting called from GDK's timer handler we
  30        are no longer within GDK's grab on the GUI
  31        thread so we must lock it here ourselves */
  32     gdk_threads_enter();
  33
  34     timer->Notify();
  35
  36     /* release lock again */
  37     gdk_threads_leave();
  38
  39     if ( timer->IsOneShot() )
  40         return FALSE;
  41
  42     return TRUE;
  43 }
  44
  45 void wxTimer::Init()
  46 {
  47     m_tag = -1;
  48     m_milli = 1000;
  49 }
  50
  51 wxTimer::~wxTimer()
  52 {
  53     wxTimer::Stop();
  54 }
  55
  56 bool wxTimer::Start( int millisecs, bool oneShot )
  57 {
  58     (void)wxTimerBase::Start(millisecs, oneShot);
  59
  60     m_tag = gtk_timeout_add( m_milli, timeout_callback, this );
  61
  62     return TRUE;
  63 }
  64
  65 void wxTimer::Stop()
  66 {
  67     if (m_tag != -1)
  68     {
  69         gtk_timeout_remove( m_tag );
  70         m_tag = -1;
  71     }
  72 }
  73