src/gtk/evtloop.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21     #pragma implementation "evtloop.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32 #endif //WX_PRECOMP
  33
  34 #include "wx/evtloop.h"
  35
  36 #include <gtk/gtk.h>
  37
  38 // ----------------------------------------------------------------------------
  39 // wxEventLoopImpl
  40 // ----------------------------------------------------------------------------
  41
  42 class WXDLLEXPORT wxEventLoopImpl
  43 {
  44 public:
  45     // ctor
  46     wxEventLoopImpl() { SetExitCode(0); }
  47
  48     // set/get the exit code
  49     void SetExitCode(int exitcode) { m_exitcode = exitcode; }
  50     int GetExitCode() const { return m_exitcode; }
  51
  52 private:
  53     // the exit code of the event loop
  54     int m_exitcode;
  55 };
  56
  57 // ============================================================================
  58 // wxEventLoop implementation
  59 // ============================================================================
  60
  61 // ----------------------------------------------------------------------------
  62 // wxEventLoop running and exiting
  63 // ----------------------------------------------------------------------------
  64
  65 wxEventLoop *wxEventLoop::ms_activeLoop = NULL;
  66
  67 wxEventLoop::~wxEventLoop()
  68 {
  69     wxASSERT_MSG( !m_impl, _T("should have been deleted in Run()") );
  70 }
  71
  72 bool wxEventLoop::IsRunning() const
  73 {
  74     return m_impl != NULL;
  75 }
  76
  77 int wxEventLoop::Run()
  78 {
  79     // event loops are not recursive, you need to create another loop!
  80     wxCHECK_MSG( !IsRunning(), -1, _T("can't reenter a message loop") );
  81
  82     wxEventLoop *oldLoop = ms_activeLoop;
  83     ms_activeLoop = this;
  84
  85     m_impl = new wxEventLoopImpl;
  86
  87     gtk_main();
  88
  89     int exitcode = m_impl->GetExitCode();
  90     delete m_impl;
  91     m_impl = NULL;
  92
  93     ms_activeLoop = oldLoop;
  94
  95     return exitcode;
  96 }
  97
  98 void wxEventLoop::Exit(int rc)
  99 {
 100     wxCHECK_RET( IsRunning(), _T("can't call Exit() if not running") );
 101
 102     m_impl->SetExitCode(rc);
 103
 104     gtk_main_quit();
 105 }
 106
 107 // ----------------------------------------------------------------------------
 108 // wxEventLoop message processing dispatching
 109 // ----------------------------------------------------------------------------
 110
 111 bool wxEventLoop::Pending() const
 112 {
 113     return gtk_events_pending() > 0;
 114 }
 115
 116 bool wxEventLoop::Dispatch()
 117 {
 118     wxCHECK_MSG( IsRunning(), FALSE, _T("can't call Dispatch() if not running") );
 119
 120     gtk_main_iteration();
 121
 122     return TRUE;
 123 }
 124