second part of #10320: move wxApp event handling functions to wxEventLoopBase (in particular move Yield() functions); add backward compatible redirections to wxApp; update docs; remove global lists wxPendingEvents and wxPendingEventsLocker

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58911 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/evtloop.cpp

@@ -36,6 +36,8 @@
 // wxEventLoop implementation
 // ============================================================================
 
+extern GtkWidget *wxGetRootWindow();
+
 // ----------------------------------------------------------------------------
 // wxEventLoop running and exiting
 // ----------------------------------------------------------------------------
@@ -126,4 +128,146 @@ int wxGUIEventLoop::DispatchTimeout(unsigned long timeout)
     return !quit;
 }
 
+//-----------------------------------------------------------------------------
+// YieldFor
+//-----------------------------------------------------------------------------
 
+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
+
+    // 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);
+    }
+
+    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();      // ProcessIdle() also calls ProcessPendingEvents()
+    }
+    //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
+    for (size_t i=0; i<m_arrGdkEvents.GetCount(); i++)
+    {
+        GdkEvent* ev = (GdkEvent*)m_arrGdkEvents[i];
+
+        // NOTE: gdk_display_put_event makes a copy of the event passed to it
+        gdk_display_put_event(disp, ev);
+        gdk_event_free(ev);
+    }
+
+    m_arrGdkEvents.Clear();
+
+#if wxUSE_LOG
+    // let the logs be flashed again
+    wxLog::Resume();
+#endif
+
+    m_isInsideYield = false;
+
+    return true;
+}