// Created: 10.07.01
// RCS-ID: $Id$
// Copyright: (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
-// License: wxWindows licence
+// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
// ============================================================================
#endif
#include "wx/evtloop.h"
+#include "wx/evtloopsrc.h"
#ifndef WX_PRECOMP
#include "wx/app.h"
#endif // WX_PRECOMP
#include <gtk/gtk.h>
+#include <glib.h>
// ============================================================================
// wxEventLoop implementation
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)
+ 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 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() returns TRUE only if gtk_main_quit() was called
return !gtk_main_iteration();
// 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<wxGUIEventLoop*>(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
wxLog::Suspend();
#endif
- // NOTE: gtk_main_iteration() doesn't allow us to filter events, so we
- // rather use gtk_main_do_event() after filtering the events at
- // GDK level
-
- GdkDisplay* disp = gtk_widget_get_display(wxGetRootWindow());
-
- // gdk_display_get_event() will transform X11 events into GDK events
- // and will queue all of them in the display (private) structure;
- // finally it will "unqueue" the last one and return it to us
- GdkEvent* event = gdk_display_get_event(disp);
- while (event)
- {
- // categorize the GDK event according to wxEventCategory.
- // See http://library.gnome.org/devel/gdk/unstable/gdk-Events.html#GdkEventType
- // for more info.
-
- wxEventCategory cat = 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_PROXIMITY_IN:
- case GDK_PROXIMITY_OUT:
-
- case GDK_MOTION_NOTIFY:
- 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_WINDOW_STATE:
- case GDK_SETTING:
- case GDK_DELETE:
- case GDK_DESTROY:
-
- case GDK_EXPOSE:
- case GDK_NO_EXPOSE:
- case GDK_MAP:
- case GDK_UNMAP:
- //case GDK_DAMAGE:
-
- case GDK_DRAG_ENTER:
- case GDK_DRAG_LEAVE:
- case GDK_DRAG_MOTION:
- case GDK_DRAG_STATUS:
- case GDK_DROP_START:
- case GDK_DROP_FINISHED:
- case GDK_GRAB_BROKEN:
- cat = wxEVT_CATEGORY_UI;
- break;
-
- default:
- cat = wxEVT_CATEGORY_UNKNOWN;
- break;
- }
-
- if (eventsToProcess & cat)
- gtk_main_do_event(event); // process it now
- else
- m_arrGdkEvents.Add(event); // process it later
-
- // get next event
- event = gdk_display_get_event(disp);
- }
+ // 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);
if (eventsToProcess != wxEVT_CATEGORY_CLIPBOARD)
{
// 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<m_arrGdkEvents.GetCount(); i++)
{
GdkEvent* ev = (GdkEvent*)m_arrGdkEvents[i];
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