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