1*b1cdbd2cSJim Jagielski /************************************************************** 2*b1cdbd2cSJim Jagielski * 3*b1cdbd2cSJim Jagielski * Licensed to the Apache Software Foundation (ASF) under one 4*b1cdbd2cSJim Jagielski * or more contributor license agreements. See the NOTICE file 5*b1cdbd2cSJim Jagielski * distributed with this work for additional information 6*b1cdbd2cSJim Jagielski * regarding copyright ownership. The ASF licenses this file 7*b1cdbd2cSJim Jagielski * to you under the Apache License, Version 2.0 (the 8*b1cdbd2cSJim Jagielski * "License"); you may not use this file except in compliance 9*b1cdbd2cSJim Jagielski * with the License. You may obtain a copy of the License at 10*b1cdbd2cSJim Jagielski * 11*b1cdbd2cSJim Jagielski * http://www.apache.org/licenses/LICENSE-2.0 12*b1cdbd2cSJim Jagielski * 13*b1cdbd2cSJim Jagielski * Unless required by applicable law or agreed to in writing, 14*b1cdbd2cSJim Jagielski * software distributed under the License is distributed on an 15*b1cdbd2cSJim Jagielski * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*b1cdbd2cSJim Jagielski * KIND, either express or implied. See the License for the 17*b1cdbd2cSJim Jagielski * specific language governing permissions and limitations 18*b1cdbd2cSJim Jagielski * under the License. 19*b1cdbd2cSJim Jagielski * 20*b1cdbd2cSJim Jagielski *************************************************************/ 21*b1cdbd2cSJim Jagielski 22*b1cdbd2cSJim Jagielski 23*b1cdbd2cSJim Jagielski 24*b1cdbd2cSJim Jagielski #ifndef INCLUDED_SLIDESHOW_VIEWEVENTHANDLER_HXX 25*b1cdbd2cSJim Jagielski #define INCLUDED_SLIDESHOW_VIEWEVENTHANDLER_HXX 26*b1cdbd2cSJim Jagielski 27*b1cdbd2cSJim Jagielski #include <boost/shared_ptr.hpp> 28*b1cdbd2cSJim Jagielski #include <boost/weak_ptr.hpp> 29*b1cdbd2cSJim Jagielski 30*b1cdbd2cSJim Jagielski #include "unoview.hxx" 31*b1cdbd2cSJim Jagielski 32*b1cdbd2cSJim Jagielski 33*b1cdbd2cSJim Jagielski /* Definition of ViewEventHandler interface */ 34*b1cdbd2cSJim Jagielski 35*b1cdbd2cSJim Jagielski namespace slideshow 36*b1cdbd2cSJim Jagielski { 37*b1cdbd2cSJim Jagielski namespace internal 38*b1cdbd2cSJim Jagielski { 39*b1cdbd2cSJim Jagielski 40*b1cdbd2cSJim Jagielski /** Interface for handling view events. 41*b1cdbd2cSJim Jagielski 42*b1cdbd2cSJim Jagielski Classes implementing this interface can be added to an 43*b1cdbd2cSJim Jagielski EventMultiplexer object, and are called from there to 44*b1cdbd2cSJim Jagielski handle view events. 45*b1cdbd2cSJim Jagielski */ 46*b1cdbd2cSJim Jagielski class ViewEventHandler 47*b1cdbd2cSJim Jagielski { 48*b1cdbd2cSJim Jagielski public: ~ViewEventHandler()49*b1cdbd2cSJim Jagielski virtual ~ViewEventHandler() {} 50*b1cdbd2cSJim Jagielski 51*b1cdbd2cSJim Jagielski /** Notify new view. 52*b1cdbd2cSJim Jagielski 53*b1cdbd2cSJim Jagielski @param rView 54*b1cdbd2cSJim Jagielski The newly added view 55*b1cdbd2cSJim Jagielski */ 56*b1cdbd2cSJim Jagielski virtual void viewAdded( const UnoViewSharedPtr& rView ) = 0; 57*b1cdbd2cSJim Jagielski 58*b1cdbd2cSJim Jagielski /** Notify removed view. 59*b1cdbd2cSJim Jagielski 60*b1cdbd2cSJim Jagielski @param rView 61*b1cdbd2cSJim Jagielski The removed view 62*b1cdbd2cSJim Jagielski */ 63*b1cdbd2cSJim Jagielski virtual void viewRemoved( const UnoViewSharedPtr& rView ) = 0; 64*b1cdbd2cSJim Jagielski 65*b1cdbd2cSJim Jagielski /** Notify changed view. 66*b1cdbd2cSJim Jagielski 67*b1cdbd2cSJim Jagielski Reasons for a viewChanged notification can be 68*b1cdbd2cSJim Jagielski different view size, transformation, or other device 69*b1cdbd2cSJim Jagielski properties (color resolution or profile, etc.) 70*b1cdbd2cSJim Jagielski 71*b1cdbd2cSJim Jagielski @param rView 72*b1cdbd2cSJim Jagielski The changed view 73*b1cdbd2cSJim Jagielski */ 74*b1cdbd2cSJim Jagielski virtual void viewChanged( const UnoViewSharedPtr& rView ) = 0; 75*b1cdbd2cSJim Jagielski 76*b1cdbd2cSJim Jagielski /** Notify that all views changed. 77*b1cdbd2cSJim Jagielski 78*b1cdbd2cSJim Jagielski Reasons for a viewChanged notification can be 79*b1cdbd2cSJim Jagielski different view size, transformation, or other device 80*b1cdbd2cSJim Jagielski properties (color resolution or profile, etc.) 81*b1cdbd2cSJim Jagielski 82*b1cdbd2cSJim Jagielski Note that this method avoids hidden inefficiencies 83*b1cdbd2cSJim Jagielski (O(n^2) behaviour when viewChanged() needs to perform 84*b1cdbd2cSJim Jagielski linear searches) 85*b1cdbd2cSJim Jagielski */ 86*b1cdbd2cSJim Jagielski virtual void viewsChanged() = 0; 87*b1cdbd2cSJim Jagielski }; 88*b1cdbd2cSJim Jagielski 89*b1cdbd2cSJim Jagielski typedef ::boost::shared_ptr< ViewEventHandler > ViewEventHandlerSharedPtr; 90*b1cdbd2cSJim Jagielski typedef ::boost::weak_ptr< ViewEventHandler > ViewEventHandlerWeakPtr; 91*b1cdbd2cSJim Jagielski 92*b1cdbd2cSJim Jagielski } 93*b1cdbd2cSJim Jagielski } 94*b1cdbd2cSJim Jagielski 95*b1cdbd2cSJim Jagielski #endif /* INCLUDED_SLIDESHOW_VIEWEVENTHANDLER_HXX */ 96