src/gtk/evtloop.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/evtloop.cpp
   3 // Purpose:     implements wxEventLoop for GTK+
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     10.07.01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // License:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #include "wx/evtloop.h"
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/app.h"
  31 #endif // WX_PRECOMP
  32
  33 #include <gtk/gtk.h>
  34
  35 // ----------------------------------------------------------------------------
  36 // wxEventLoopImpl
  37 // ----------------------------------------------------------------------------
  38
  39 class WXDLLEXPORT wxEventLoopImpl
  40 {
  41 public:
  42     // ctor
  43     wxEventLoopImpl() { SetExitCode(0); }
  44
  45     // set/get the exit code
  46     void SetExitCode(int exitcode) { m_exitcode = exitcode; }
  47     int GetExitCode() const { return m_exitcode; }
  48
  49 private:
  50     // the exit code of the event loop
  51     int m_exitcode;
  52 };
  53
  54 // ============================================================================
  55 // wxEventLoop implementation
  56 // ============================================================================
  57
  58 // ----------------------------------------------------------------------------
  59 // wxEventLoop running and exiting
  60 // ----------------------------------------------------------------------------
  61
  62 wxEventLoop::~wxEventLoop()
  63 {
  64     wxASSERT_MSG( !m_impl, _T("should have been deleted in Run()") );
  65 }
  66
  67 int wxEventLoop::Run()
  68 {
  69     // event loops are not recursive, you need to create another loop!
  70     wxCHECK_MSG( !IsRunning(), -1, _T("can't reenter a message loop") );
  71
  72     wxEventLoopActivator activate(this);
  73
  74     m_impl = new wxEventLoopImpl;
  75
  76     gtk_main();
  77
  78     int exitcode = m_impl->GetExitCode();
  79     delete m_impl;
  80     m_impl = NULL;
  81
  82     return exitcode;
  83 }
  84
  85 void wxEventLoop::Exit(int rc)
  86 {
  87     wxCHECK_RET( IsRunning(), _T("can't call Exit() if not running") );
  88
  89     m_impl->SetExitCode(rc);
  90
  91     gtk_main_quit();
  92 }
  93
  94 // ----------------------------------------------------------------------------
  95 // wxEventLoop message processing dispatching
  96 // ----------------------------------------------------------------------------
  97
  98 bool wxEventLoop::Pending() const
  99 {
 100     if (wxTheApp)
 101     {
 102         // We need to remove idle callbacks or gtk_events_pending will
 103         // never return false.
 104         wxTheApp->RemoveIdleTag();
 105     }
 106
 107     return gtk_events_pending();
 108 }
 109
 110 bool wxEventLoop::Dispatch()
 111 {
 112     wxCHECK_MSG( IsRunning(), false, _T("can't call Dispatch() if not running") );
 113
 114     gtk_main_iteration();
 115
 116     return true;
 117 }