| 1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/gtk1/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 | #include "wx/log.h" |
| 32 | #endif // WX_PRECOMP |
| 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 | // wxGUIEventLoop implementation |
| 57 | // ============================================================================ |
| 58 | |
| 59 | // ---------------------------------------------------------------------------- |
| 60 | // wxGUIEventLoop running and exiting |
| 61 | // ---------------------------------------------------------------------------- |
| 62 | |
| 63 | wxGUIEventLoop::~wxGUIEventLoop() |
| 64 | { |
| 65 | wxASSERT_MSG( !m_impl, wxT("should have been deleted in Run()") ); |
| 66 | } |
| 67 | |
| 68 | int wxGUIEventLoop::Run() |
| 69 | { |
| 70 | // event loops are not recursive, you need to create another loop! |
| 71 | wxCHECK_MSG( !IsRunning(), -1, wxT("can't reenter a message loop") ); |
| 72 | |
| 73 | wxEventLoopActivator activate(this); |
| 74 | |
| 75 | m_impl = new wxEventLoopImpl; |
| 76 | |
| 77 | gtk_main(); |
| 78 | |
| 79 | OnExit(); |
| 80 | |
| 81 | int exitcode = m_impl->GetExitCode(); |
| 82 | delete m_impl; |
| 83 | m_impl = NULL; |
| 84 | |
| 85 | return exitcode; |
| 86 | } |
| 87 | |
| 88 | void wxGUIEventLoop::Exit(int rc) |
| 89 | { |
| 90 | wxCHECK_RET( IsRunning(), wxT("can't call Exit() if not running") ); |
| 91 | |
| 92 | m_impl->SetExitCode(rc); |
| 93 | |
| 94 | gtk_main_quit(); |
| 95 | } |
| 96 | |
| 97 | // ---------------------------------------------------------------------------- |
| 98 | // wxEventLoop message processing dispatching |
| 99 | // ---------------------------------------------------------------------------- |
| 100 | |
| 101 | bool wxGUIEventLoop::Pending() const |
| 102 | { |
| 103 | if (wxTheApp) |
| 104 | { |
| 105 | // We need to remove idle callbacks or gtk_events_pending will |
| 106 | // never return false. |
| 107 | wxTheApp->RemoveIdleTag(); |
| 108 | } |
| 109 | |
| 110 | return gtk_events_pending(); |
| 111 | } |
| 112 | |
| 113 | bool wxGUIEventLoop::Dispatch() |
| 114 | { |
| 115 | wxCHECK_MSG( IsRunning(), false, wxT("can't call Dispatch() if not running") ); |
| 116 | |
| 117 | gtk_main_iteration(); |
| 118 | |
| 119 | return true; |
| 120 | } |
| 121 | |
| 122 | //----------------------------------------------------------------------------- |
| 123 | // wxYield |
| 124 | //----------------------------------------------------------------------------- |
| 125 | |
| 126 | bool wxGUIEventLoop::YieldFor(long eventsToProcess) |
| 127 | { |
| 128 | #if wxUSE_THREADS |
| 129 | if ( !wxThread::IsMain() ) |
| 130 | { |
| 131 | // can't call gtk_main_iteration() from other threads like this |
| 132 | return true; |
| 133 | } |
| 134 | #endif // wxUSE_THREADS |
| 135 | |
| 136 | m_isInsideYield = true; |
| 137 | m_eventsToProcessInsideYield = eventsToProcess; |
| 138 | |
| 139 | // We need to remove idle callbacks or the loop will |
| 140 | // never finish. |
| 141 | wxTheApp->RemoveIdleTag(); |
| 142 | |
| 143 | #if wxUSE_LOG |
| 144 | // disable log flushing from here because a call to wxYield() shouldn't |
| 145 | // normally result in message boxes popping up &c |
| 146 | wxLog::Suspend(); |
| 147 | #endif |
| 148 | |
| 149 | // TODO: implement event filtering using the eventsToProcess mask |
| 150 | while (gtk_events_pending()) |
| 151 | gtk_main_iteration(); |
| 152 | |
| 153 | // It's necessary to call ProcessIdle() to update the frames sizes which |
| 154 | // might have been changed (it also will update other things set from |
| 155 | // OnUpdateUI() which is a nice (and desired) side effect). But we |
| 156 | // call ProcessIdle() only once since this is not meant for longish |
| 157 | // background jobs (controlled by wxIdleEvent::RequestMore() and the |
| 158 | // return value of Processidle(). |
| 159 | ProcessIdle(); |
| 160 | |
| 161 | #if wxUSE_LOG |
| 162 | // let the logs be flashed again |
| 163 | wxLog::Resume(); |
| 164 | #endif |
| 165 | |
| 166 | m_isInsideYield = false; |
| 167 | |
| 168 | return true; |
| 169 | } |