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 // 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 #include "wx/app.h"
  29
  30 #include <gtk/gtk.h>
  31
  32 // ----------------------------------------------------------------------------
  33 // wxEventLoopImpl
  34 // ----------------------------------------------------------------------------
  35
  36 class WXDLLEXPORT wxEventLoopImpl
  37 {
  38 public:
  39     // ctor
  40     wxEventLoopImpl() { SetExitCode(0); }
  41
  42     // set/get the exit code
  43     void SetExitCode(int exitcode) { m_exitcode = exitcode; }
  44     int GetExitCode() const { return m_exitcode; }
  45
  46 private:
  47     // the exit code of the event loop
  48     int m_exitcode;
  49 };
  50
  51 // ============================================================================
  52 // wxEventLoop implementation
  53 // ============================================================================
  54
  55 // ----------------------------------------------------------------------------
  56 // wxEventLoop running and exiting
  57 // ----------------------------------------------------------------------------
  58
  59 wxEventLoop::~wxEventLoop()
  60 {
  61     wxASSERT_MSG( !m_impl, _T("should have been deleted in Run()") );
  62 }
  63
  64 int wxEventLoop::Run()
  65 {
  66     // event loops are not recursive, you need to create another loop!
  67     wxCHECK_MSG( !IsRunning(), -1, _T("can't reenter a message loop") );
  68
  69     wxEventLoopActivator activate(this);
  70
  71     m_impl = new wxEventLoopImpl;
  72
  73     gtk_main();
  74
  75     int exitcode = m_impl->GetExitCode();
  76     delete m_impl;
  77     m_impl = NULL;
  78
  79     return exitcode;
  80 }
  81
  82 void wxEventLoop::Exit(int rc)
  83 {
  84     wxCHECK_RET( IsRunning(), _T("can't call Exit() if not running") );
  85
  86     m_impl->SetExitCode(rc);
  87
  88     gtk_main_quit();
  89 }
  90
  91 // ----------------------------------------------------------------------------
  92 // wxEventLoop message processing dispatching
  93 // ----------------------------------------------------------------------------
  94
  95 bool wxEventLoop::Pending() const
  96 {
  97     if (wxTheApp)
  98     {
  99         // We need to remove idle callbacks or gtk_events_pending will
 100         // never return false.
 101         wxTheApp->RemoveIdleTag();
 102     }
 103
 104     return gtk_events_pending();
 105 }
 106
 107 bool wxEventLoop::Dispatch()
 108 {
 109     wxCHECK_MSG( IsRunning(), FALSE, _T("can't call Dispatch() if not running") );
 110
 111     gtk_main_iteration();
 112
 113     return TRUE;
 114 }
 115