| /************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| #ifndef INCLUDED_SLIDESHOW_EVENTHANDLER_HXX |
| #define INCLUDED_SLIDESHOW_EVENTHANDLER_HXX |
| |
| #include <boost/shared_ptr.hpp> |
| |
| |
| /* Definition of EventHandler interface */ |
| |
| namespace slideshow |
| { |
| namespace internal |
| { |
| |
| /** Interface for event handling objects. |
| |
| Classes implementing this interface can be added to an |
| EventMultiplexer object, and are called from there to |
| handle events. |
| */ |
| class EventHandler |
| { |
| public: |
| virtual ~EventHandler() {} |
| |
| /** Handle the event. |
| |
| @return true, if this handler has successfully |
| processed the event. When this method returns false, |
| possibly other, less prioritized handlers are called, |
| too. |
| */ |
| virtual bool handleEvent() = 0; |
| }; |
| |
| typedef ::boost::shared_ptr< EventHandler > EventHandlerSharedPtr; |
| |
| } |
| } |
| |
| #endif /* INCLUDED_SLIDESHOW_EVENTHANDLER_HXX */ |
