// 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 <zeitlin@dptmaths.ens-cachan.fr>
-// License: wxWindows licence
+// (c) 2013 Rob Bresalier, Vadim Zeitlin
+// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
// ============================================================================
#endif
#include "wx/evtloop.h"
+#include "wx/evtloopsrc.h"
#ifndef WX_PRECOMP
#include "wx/app.h"
#include "wx/log.h"
#endif // WX_PRECOMP
+#include "wx/private/eventloopsourcesmanager.h"
+#include "wx/apptrait.h"
+
#include <gtk/gtk.h>
+#include <glib.h>
// ============================================================================
// wxEventLoop implementation
m_exitcode = 0;
}
-int wxGUIEventLoop::Run()
+int wxGUIEventLoop::DoRun()
{
- // event loops are not recursive, you need to create another loop!
- wxCHECK_MSG( !IsRunning(), -1, "can't reenter a message loop" );
+ guint loopLevel = gtk_main_level();
- wxEventLoopActivator activate(this);
+ // This is placed inside of a loop to take into account nested
+ // event loops. For example, inside this event loop, we may receive
+ // Exit() for a different event loop (which we are currently inside of)
+ // That Exit() will cause this gtk_main() to exit so we need to re-enter it.
+ while ( !m_shouldExit )
+ {
+ gtk_main();
+ }
- gtk_main();
+ // Force the enclosing event loop to also exit to see if it is done in case
+ // that event loop had Exit() called inside of the just ended loop. If it
+ // is not time yet for that event loop to exit, it will be executed again
+ // due to the while() loop on m_shouldExit().
+ //
+ // This is unnecessary if we are the top level loop, i.e. loop of level 0.
+ if ( loopLevel )
+ {
+ gtk_main_quit();
+ }
OnExit();
return m_exitcode;
}
-void wxGUIEventLoop::Exit(int rc)
+void wxGUIEventLoop::ScheduleExit(int rc)
{
- wxCHECK_RET( IsRunning(), "can't call Exit() if not running" );
+ wxCHECK_RET( IsInsideRun(), wxT("can't call ScheduleExit() if not started") );
m_exitcode = rc;
+ m_shouldExit = true;
+
gtk_main_quit();
}
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<wxEventLoopSourceHandler *>(data);
+
+ if ( (condition & G_IO_IN) || (condition & G_IO_PRI) || (condition & G_IO_HUP) )
+ handler->OnReadWaiting();
+
+ if (condition & G_IO_OUT)
+ handler->OnWriteWaiting();
+
+ if ( (condition & G_IO_ERR) || (condition & G_IO_NVAL) )
+ handler->OnExceptionWaiting();
+
+ // we never want to remove source here, so always return true
+ //
+ // The source may have been removed by the handler, so it may be
+ // a good idea to return FALSE when the source has already been
+ // removed. However, that would involve somehow informing this function
+ // that the source was removed, which is not trivial to implement
+ // and handle all cases. It has been found through testing
+ // that if the source was removed by the handler, that even if we
+ // return TRUE here, the source/callback will not get called again.
+ return TRUE;
+}
+}
+
+class wxGUIEventLoopSourcesManager : public wxEventLoopSourcesManagerBase
+{
+public:
+ virtual wxEventLoopSource*
+ 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 | G_IO_HUP;
+ if ( flags & wxEVENT_SOURCE_OUTPUT )
+ condition |= G_IO_OUT;
+ if ( flags & wxEVENT_SOURCE_EXCEPTION )
+ condition |= G_IO_ERR | 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);
+ }
+};
+
+wxEventLoopSourcesManagerBase* wxGUIAppTraits::GetEventLoopSourcesManager()
+{
+ static wxGUIEventLoopSourcesManager s_eventLoopSourcesManager;
+
+ return &s_eventLoopSourcesManager;
+}
+
+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
// ----------------------------------------------------------------------------
// YieldFor
//-----------------------------------------------------------------------------
-static void wxgtk_main_do_event(GdkEvent *event, wxGUIEventLoop* evtloop)
+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
+ // 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).
- wxEventCategory cat = wxEVT_CATEGORY_UNKNOWN;
+ // 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:
-#if GTK_CHECK_VERSION(2,6,0)
case GDK_OWNER_CHANGE:
-#endif
cat = wxEVT_CATEGORY_CLIPBOARD;
break;
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_ENTER_NOTIFY:
case GDK_LEAVE_NOTIFY:
case GDK_VISIBILITY_NOTIFY:
- case GDK_PROPERTY_NOTIFY:
case GDK_FOCUS_CHANGE:
case GDK_CONFIGURE:
case GDK_DESTROY:
case GDK_EXPOSE:
+#ifndef __WXGTK3__
case GDK_NO_EXPOSE:
+#endif
case GDK_MAP:
case GDK_UNMAP:
break;
}
+ wxGUIEventLoop* evtloop = static_cast<wxGUIEventLoop*>(data);
+
// is this event allowed now?
- if (evtloop->IsEventAllowedInsideYield(cat))
- gtk_main_do_event(event); // process it 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));
- // process it later (but make a copy; the caller will free the event pointer)
+ }
+}
}
bool wxGUIEventLoop::YieldFor(long eventsToProcess)
// 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 ((GdkEventFunc)wxgtk_main_do_event, this, NULL);
+ 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
// call ProcessIdle() only once since this is not meant for longish
// background jobs (controlled by wxIdleEvent::RequestMore() and the
// return value of Processidle().
- ProcessIdle(); // ProcessIdle() also calls ProcessPendingEvents()
+ ProcessIdle();
}
//else: if we are inside ~wxClipboardSync() and we call ProcessIdle() and
// the user app contains an UI update handler which calls wxClipboard::IsSupported,
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