X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/25e2f480a7865625b25753d159ae351b78d337b9..4e15d1caa03346c126015019c1fdf093033ef40b:/src/gtk/evtloop.cpp diff --git a/src/gtk/evtloop.cpp b/src/gtk/evtloop.cpp index d684ccb0eb..cc118104d5 100644 --- a/src/gtk/evtloop.cpp +++ b/src/gtk/evtloop.cpp @@ -1,12 +1,12 @@ /////////////////////////////////////////////////////////////////////////////// -// Name: gtk/evtloop.cpp +// Name: src/gtk/evtloop.cpp // Purpose: implements wxEventLoop for GTK+ // Author: Vadim Zeitlin // Modified by: // Created: 10.07.01 // RCS-ID: $Id$ // Copyright: (c) 2001 Vadim Zeitlin -// License: wxWindows licence +// Licence: wxWindows licence /////////////////////////////////////////////////////////////////////////////// // ============================================================================ @@ -25,91 +25,374 @@ #endif #include "wx/evtloop.h" -#include "wx/app.h" +#include "wx/evtloopsrc.h" -#include - -// ---------------------------------------------------------------------------- -// wxEventLoopImpl -// ---------------------------------------------------------------------------- - -class WXDLLEXPORT wxEventLoopImpl -{ -public: - // ctor - wxEventLoopImpl() { SetExitCode(0); } - - // set/get the exit code - void SetExitCode(int exitcode) { m_exitcode = exitcode; } - int GetExitCode() const { return m_exitcode; } +#ifndef WX_PRECOMP + #include "wx/app.h" + #include "wx/log.h" +#endif // WX_PRECOMP -private: - // the exit code of the event loop - int m_exitcode; -}; +#include +#include // ============================================================================ // wxEventLoop implementation // ============================================================================ +extern GtkWidget *wxGetRootWindow(); + // ---------------------------------------------------------------------------- // wxEventLoop running and exiting // ---------------------------------------------------------------------------- -wxEventLoop::~wxEventLoop() +wxGUIEventLoop::wxGUIEventLoop() { - wxASSERT_MSG( !m_impl, _T("should have been deleted in Run()") ); + m_exitcode = 0; } -int wxEventLoop::Run() +int wxGUIEventLoop::Run() { // event loops are not recursive, you need to create another loop! - wxCHECK_MSG( !IsRunning(), -1, _T("can't reenter a message loop") ); + wxCHECK_MSG( !IsRunning(), -1, "can't reenter a message loop" ); wxEventLoopActivator activate(this); - m_impl = new wxEventLoopImpl; - gtk_main(); - int exitcode = m_impl->GetExitCode(); - delete m_impl; - m_impl = NULL; + OnExit(); - return exitcode; + return m_exitcode; } -void wxEventLoop::Exit(int rc) +void wxGUIEventLoop::Exit(int rc) { - wxCHECK_RET( IsRunning(), _T("can't call Exit() if not running") ); + wxCHECK_RET( IsRunning(), "can't call Exit() if not running" ); - m_impl->SetExitCode(rc); + m_exitcode = rc; gtk_main_quit(); } +void wxGUIEventLoop::WakeUp() +{ + // TODO: idle events handling should really be done by wxEventLoop itself + // but for now it's completely in gtk/app.cpp so just call there when + // we have wxTheApp and hope that it doesn't matter that we do + // nothing when we don't... + if ( wxTheApp ) + wxTheApp->WakeUpIdle(); +} + +// ---------------------------------------------------------------------------- +// wxEventLoop adding & removing sources +// ---------------------------------------------------------------------------- + +#if wxUSE_EVENTLOOP_SOURCE + +extern "C" +{ +static gboolean wx_on_channel_event(GIOChannel *channel, + GIOCondition condition, + gpointer data) +{ + wxUnusedVar(channel); // Unused if !wxUSE_LOG || !wxDEBUG_LEVEL + + wxLogTrace(wxTRACE_EVT_SOURCE, + "wx_on_channel_event, fd=%d, condition=%08x", + g_io_channel_unix_get_fd(channel), condition); + + wxEventLoopSourceHandler * const + handler = static_cast(data); + + if (condition & G_IO_IN || condition & G_IO_PRI) + handler->OnReadWaiting(); + if (condition & G_IO_OUT) + handler->OnWriteWaiting(); + else if (condition & G_IO_ERR || condition & G_IO_NVAL) + handler->OnExceptionWaiting(); + + // we never want to remove source here, so always return true + return TRUE; +} +} + +wxEventLoopSource * +wxGUIEventLoop::AddSourceForFD(int fd, + wxEventLoopSourceHandler *handler, + int flags) +{ + wxCHECK_MSG( fd != -1, NULL, "can't monitor invalid fd" ); + + int condition = 0; + if (flags & wxEVENT_SOURCE_INPUT) + condition |= G_IO_IN | G_IO_PRI; + if (flags & wxEVENT_SOURCE_OUTPUT) + condition |= G_IO_OUT; + if (flags & wxEVENT_SOURCE_EXCEPTION) + condition |= G_IO_ERR | G_IO_HUP | G_IO_NVAL; + + GIOChannel* channel = g_io_channel_unix_new(fd); + const unsigned sourceId = g_io_add_watch + ( + channel, + (GIOCondition)condition, + &wx_on_channel_event, + handler + ); + // it was ref'd by g_io_add_watch() so we can unref it here + g_io_channel_unref(channel); + + if ( !sourceId ) + return NULL; + + wxLogTrace(wxTRACE_EVT_SOURCE, + "Adding event loop source for fd=%d with GTK id=%u", + fd, sourceId); + + + return new wxGTKEventLoopSource(sourceId, handler, flags); +} + +wxGTKEventLoopSource::~wxGTKEventLoopSource() +{ + wxLogTrace(wxTRACE_EVT_SOURCE, + "Removing event loop source with GTK id=%u", m_sourceId); + + g_source_remove(m_sourceId); +} + +#endif // wxUSE_EVENTLOOP_SOURCE + // ---------------------------------------------------------------------------- // wxEventLoop message processing dispatching // ---------------------------------------------------------------------------- -bool wxEventLoop::Pending() const +bool wxGUIEventLoop::Pending() const { - if (wxTheApp) + if ( wxTheApp ) { - // We need to remove idle callbacks or gtk_events_pending will - // never return false. - wxTheApp->RemoveIdleTag(); + // this avoids false positives from our idle source + return wxTheApp->EventsPending(); } - return gtk_events_pending(); + return gtk_events_pending() != 0; } -bool wxEventLoop::Dispatch() +bool wxGUIEventLoop::Dispatch() { - wxCHECK_MSG( IsRunning(), FALSE, _T("can't call Dispatch() if not running") ); + wxCHECK_MSG( IsRunning(), false, wxT("can't call Dispatch() if not running") ); - gtk_main_iteration(); + // gtk_main_iteration() returns TRUE only if gtk_main_quit() was called + return !gtk_main_iteration(); +} - return TRUE; +extern "C" { +static gboolean wx_event_loop_timeout(void* data) +{ + bool* expired = static_cast(data); + *expired = true; + + // return FALSE to remove this timeout + return FALSE; +} } +int wxGUIEventLoop::DispatchTimeout(unsigned long timeout) +{ + bool expired = false; + const unsigned id = g_timeout_add(timeout, wx_event_loop_timeout, &expired); + bool quit = gtk_main_iteration() != 0; + + if ( expired ) + return -1; + + g_source_remove(id); + + return !quit; +} + +//----------------------------------------------------------------------------- +// YieldFor +//----------------------------------------------------------------------------- + +extern "C" { +static void wxgtk_main_do_event(GdkEvent* event, void* data) +{ + // categorize the GDK event according to wxEventCategory. + // See http://library.gnome.org/devel/gdk/unstable/gdk-Events.html#GdkEventType + // for more info. + + // NOTE: GDK_* constants which were not present in the GDK2.0 can be tested for + // only at compile-time; when running the program (compiled with a recent GDK) + // on a system with an older GDK lib we can be sure there won't be problems + // because event->type will never assume those values corresponding to + // new event types (since new event types are always added in GDK with non + // conflicting values for ABI compatibility). + + // Some events (currently only a single one) may be used for more than one + // category, so we need 2 variables. The second one will remain "unknown" + // in most cases. + wxEventCategory cat = wxEVT_CATEGORY_UNKNOWN, + cat2 = wxEVT_CATEGORY_UNKNOWN; + switch (event->type) + { + case GDK_SELECTION_REQUEST: + case GDK_SELECTION_NOTIFY: + case GDK_SELECTION_CLEAR: + case GDK_OWNER_CHANGE: + cat = wxEVT_CATEGORY_CLIPBOARD; + break; + + case GDK_KEY_PRESS: + case GDK_KEY_RELEASE: + case GDK_BUTTON_PRESS: + case GDK_2BUTTON_PRESS: + case GDK_3BUTTON_PRESS: + case GDK_BUTTON_RELEASE: + case GDK_SCROLL: // generated from mouse buttons + case GDK_CLIENT_EVENT: + cat = wxEVT_CATEGORY_USER_INPUT; + break; + + case GDK_PROPERTY_NOTIFY: + // This one is special: it can be used for UI purposes but also for + // clipboard operations, so allow it in both cases (we probably could + // examine the event itself to distinguish between the two cases but + // this would be unnecessarily complicated). + cat2 = wxEVT_CATEGORY_CLIPBOARD; + // Fall through. + + case GDK_PROXIMITY_IN: + case GDK_PROXIMITY_OUT: + + case GDK_MOTION_NOTIFY: + case GDK_ENTER_NOTIFY: + case GDK_LEAVE_NOTIFY: + case GDK_VISIBILITY_NOTIFY: + + case GDK_FOCUS_CHANGE: + case GDK_CONFIGURE: + case GDK_WINDOW_STATE: + case GDK_SETTING: + case GDK_DELETE: + case GDK_DESTROY: + + case GDK_EXPOSE: +#ifndef __WXGTK3__ + case GDK_NO_EXPOSE: +#endif + case GDK_MAP: + case GDK_UNMAP: + + case GDK_DRAG_ENTER: + case GDK_DRAG_LEAVE: + case GDK_DRAG_MOTION: + case GDK_DRAG_STATUS: + case GDK_DROP_START: + case GDK_DROP_FINISHED: +#if GTK_CHECK_VERSION(2,8,0) + case GDK_GRAB_BROKEN: +#endif +#if GTK_CHECK_VERSION(2,14,0) + case GDK_DAMAGE: +#endif + cat = wxEVT_CATEGORY_UI; + break; + + default: + cat = wxEVT_CATEGORY_UNKNOWN; + break; + } + + wxGUIEventLoop* evtloop = static_cast(data); + + // is this event allowed now? + if (evtloop->IsEventAllowedInsideYield(cat) || + (cat2 != wxEVT_CATEGORY_UNKNOWN && + evtloop->IsEventAllowedInsideYield(cat2))) + { + // process it now + gtk_main_do_event(event); + } + else if (event->type != GDK_NOTHING) + { + // process it later (but make a copy; the caller will free the event + // pointer) + evtloop->StoreGdkEventForLaterProcessing(gdk_event_copy(event)); + } +} +} + +bool wxGUIEventLoop::YieldFor(long eventsToProcess) +{ +#if wxUSE_THREADS + if ( !wxThread::IsMain() ) + { + // can't call gtk_main_iteration() from other threads like this + return true; + } +#endif // wxUSE_THREADS + + m_isInsideYield = true; + m_eventsToProcessInsideYield = eventsToProcess; + +#if wxUSE_LOG + // disable log flushing from here because a call to wxYield() shouldn't + // normally result in message boxes popping up &c + wxLog::Suspend(); +#endif + + // temporarily replace the global GDK event handler with our function, which + // categorizes the events and using m_eventsToProcessInsideYield decides + // if an event should be processed immediately or not + // NOTE: this approach is better than using gdk_display_get_event() because + // gtk_main_iteration() does more than just calling gdk_display_get_event() + // and then call gtk_main_do_event()! + // In particular in this way we also process input from sources like + // GIOChannels (this is needed for e.g. wxGUIAppTraits::WaitForChild). + gdk_event_handler_set(wxgtk_main_do_event, this, NULL); + while (Pending()) // avoid false positives from our idle source + gtk_main_iteration(); + gdk_event_handler_set ((GdkEventFunc)gtk_main_do_event, NULL, NULL); + + // Process all pending events too, this is consistent with wxMSW behaviour + // and the behaviour of wxGTK itself in the previous versions. + if ( wxTheApp ) + wxTheApp->ProcessPendingEvents(); + + if (eventsToProcess != wxEVT_CATEGORY_CLIPBOARD) + { + // It's necessary to call ProcessIdle() to update the frames sizes which + // might have been changed (it also will update other things set from + // OnUpdateUI() which is a nice (and desired) side effect). But we + // call ProcessIdle() only once since this is not meant for longish + // background jobs (controlled by wxIdleEvent::RequestMore() and the + // return value of Processidle(). + ProcessIdle(); + } + //else: if we are inside ~wxClipboardSync() and we call ProcessIdle() and + // the user app contains an UI update handler which calls wxClipboard::IsSupported, + // then we fall into a never-ending loop... + + // put all unprocessed GDK events back in the queue + GdkDisplay* disp = gtk_widget_get_display(wxGetRootWindow()); + for (size_t i=0; i