1*aaef562fSAndrew Rist /************************************************************** 2cdf0e10cSrcweir * 3*aaef562fSAndrew Rist * Licensed to the Apache Software Foundation (ASF) under one 4*aaef562fSAndrew Rist * or more contributor license agreements. See the NOTICE file 5*aaef562fSAndrew Rist * distributed with this work for additional information 6*aaef562fSAndrew Rist * regarding copyright ownership. The ASF licenses this file 7*aaef562fSAndrew Rist * to you under the Apache License, Version 2.0 (the 8*aaef562fSAndrew Rist * "License"); you may not use this file except in compliance 9*aaef562fSAndrew Rist * with the License. You may obtain a copy of the License at 10*aaef562fSAndrew Rist * 11*aaef562fSAndrew Rist * http://www.apache.org/licenses/LICENSE-2.0 12*aaef562fSAndrew Rist * 13*aaef562fSAndrew Rist * Unless required by applicable law or agreed to in writing, 14*aaef562fSAndrew Rist * software distributed under the License is distributed on an 15*aaef562fSAndrew Rist * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*aaef562fSAndrew Rist * KIND, either express or implied. See the License for the 17*aaef562fSAndrew Rist * specific language governing permissions and limitations 18*aaef562fSAndrew Rist * under the License. 19*aaef562fSAndrew Rist * 20*aaef562fSAndrew Rist *************************************************************/ 21*aaef562fSAndrew Rist 22*aaef562fSAndrew Rist 23cdf0e10cSrcweir 24cdf0e10cSrcweir #ifndef INCLUDED_SLIDESHOW_VIEWEVENTHANDLER_HXX 25cdf0e10cSrcweir #define INCLUDED_SLIDESHOW_VIEWEVENTHANDLER_HXX 26cdf0e10cSrcweir 27cdf0e10cSrcweir #include <boost/shared_ptr.hpp> 28cdf0e10cSrcweir #include <boost/weak_ptr.hpp> 29cdf0e10cSrcweir 30cdf0e10cSrcweir #include "unoview.hxx" 31cdf0e10cSrcweir 32cdf0e10cSrcweir 33cdf0e10cSrcweir /* Definition of ViewEventHandler interface */ 34cdf0e10cSrcweir 35cdf0e10cSrcweir namespace slideshow 36cdf0e10cSrcweir { 37cdf0e10cSrcweir namespace internal 38cdf0e10cSrcweir { 39cdf0e10cSrcweir 40cdf0e10cSrcweir /** Interface for handling view events. 41cdf0e10cSrcweir 42cdf0e10cSrcweir Classes implementing this interface can be added to an 43cdf0e10cSrcweir EventMultiplexer object, and are called from there to 44cdf0e10cSrcweir handle view events. 45cdf0e10cSrcweir */ 46cdf0e10cSrcweir class ViewEventHandler 47cdf0e10cSrcweir { 48cdf0e10cSrcweir public: ~ViewEventHandler()49cdf0e10cSrcweir virtual ~ViewEventHandler() {} 50cdf0e10cSrcweir 51cdf0e10cSrcweir /** Notify new view. 52cdf0e10cSrcweir 53cdf0e10cSrcweir @param rView 54cdf0e10cSrcweir The newly added view 55cdf0e10cSrcweir */ 56cdf0e10cSrcweir virtual void viewAdded( const UnoViewSharedPtr& rView ) = 0; 57cdf0e10cSrcweir 58cdf0e10cSrcweir /** Notify removed view. 59cdf0e10cSrcweir 60cdf0e10cSrcweir @param rView 61cdf0e10cSrcweir The removed view 62cdf0e10cSrcweir */ 63cdf0e10cSrcweir virtual void viewRemoved( const UnoViewSharedPtr& rView ) = 0; 64cdf0e10cSrcweir 65cdf0e10cSrcweir /** Notify changed view. 66cdf0e10cSrcweir 67cdf0e10cSrcweir Reasons for a viewChanged notification can be 68cdf0e10cSrcweir different view size, transformation, or other device 69cdf0e10cSrcweir properties (color resolution or profile, etc.) 70cdf0e10cSrcweir 71cdf0e10cSrcweir @param rView 72cdf0e10cSrcweir The changed view 73cdf0e10cSrcweir */ 74cdf0e10cSrcweir virtual void viewChanged( const UnoViewSharedPtr& rView ) = 0; 75cdf0e10cSrcweir 76cdf0e10cSrcweir /** Notify that all views changed. 77cdf0e10cSrcweir 78cdf0e10cSrcweir Reasons for a viewChanged notification can be 79cdf0e10cSrcweir different view size, transformation, or other device 80cdf0e10cSrcweir properties (color resolution or profile, etc.) 81cdf0e10cSrcweir 82cdf0e10cSrcweir Note that this method avoids hidden inefficiencies 83cdf0e10cSrcweir (O(n^2) behaviour when viewChanged() needs to perform 84cdf0e10cSrcweir linear searches) 85cdf0e10cSrcweir */ 86cdf0e10cSrcweir virtual void viewsChanged() = 0; 87cdf0e10cSrcweir }; 88cdf0e10cSrcweir 89cdf0e10cSrcweir typedef ::boost::shared_ptr< ViewEventHandler > ViewEventHandlerSharedPtr; 90cdf0e10cSrcweir typedef ::boost::weak_ptr< ViewEventHandler > ViewEventHandlerWeakPtr; 91cdf0e10cSrcweir 92cdf0e10cSrcweir } 93cdf0e10cSrcweir } 94cdf0e10cSrcweir 95cdf0e10cSrcweir #endif /* INCLUDED_SLIDESHOW_VIEWEVENTHANDLER_HXX */ 96