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 *wxEventLoopBase::ms_activeLoop = NULL;
  60
  61 wxEventLoop::~wxEventLoop()
  62 {
  63     wxASSERT_MSG( !m_impl, _T("should have been deleted in Run()") );
  64 }
  65
  66 int wxEventLoop::Run()
  67 {
  68     // event loops are not recursive, you need to create another loop!
  69     wxCHECK_MSG( !IsRunning(), -1, _T("can't reenter a message loop") );
  70
  71     wxEventLoop *oldLoop = ms_activeLoop;
  72     ms_activeLoop = 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     ms_activeLoop = oldLoop;
  83
  84     return exitcode;
  85 }
  86
  87 void wxEventLoop::Exit(int rc)
  88 {
  89     wxCHECK_RET( IsRunning(), _T("can't call Exit() if not running") );
  90
  91     m_impl->SetExitCode(rc);
  92
  93     gtk_main_quit();
  94 }
  95
  96 // ----------------------------------------------------------------------------
  97 // wxEventLoop message processing dispatching
  98 // ----------------------------------------------------------------------------
  99
 100 bool wxEventLoop::Pending() const
 101 {
 102     if (wxTheApp)
 103     {
 104         // We need to remove idle callbacks or gtk_events_pending will
 105         // never return false.
 106         wxTheApp->RemoveIdleTag();
 107     }
 108
 109     return gtk_events_pending();
 110 }
 111
 112 bool wxEventLoop::Dispatch()
 113 {
 114     wxCHECK_MSG( IsRunning(), FALSE, _T("can't call Dispatch() if not running") );
 115
 116     gtk_main_iteration();
 117
 118     return TRUE;
 119 }
 120