slideshow/source/inc/vieweventhandler.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_SLIDESHOW_SOURCE_INC_VIEWEVENTHANDLER_HXX
  21 #define INCLUDED_SLIDESHOW_SOURCE_INC_VIEWEVENTHANDLER_HXX
  22
  23 #include <memory>
  24
  25 #include "unoview.hxx"
  26 #include "disposable.hxx"
  27
  28
  29 /* Definition of ViewEventHandler interface */
  30
  31 namespace slideshow
  32 {
  33     namespace internal
  34     {
  35
  36         /** Interface for handling view events.
  37
  38             Classes implementing this interface can be added to an
  39             EventMultiplexer object, and are called from there to
  40             handle view events.
  41          */
  42         class ViewEventHandler : public virtual SharedPtrAble
  43         {
  44         public:
  45             /** Notify new view.
  46
  47                 @param rView
  48                 The newly added view
  49              */
  50             virtual void viewAdded( const UnoViewSharedPtr& rView ) = 0;
  51
  52             /** Notify removed view.
  53
  54                 @param rView
  55                 The removed view
  56              */
  57             virtual void viewRemoved( const UnoViewSharedPtr& rView ) = 0;
  58
  59             /** Notify changed view.
  60
  61                 Reasons for a viewChanged notification can be
  62                 different view size, transformation, or other device
  63                 properties (color resolution or profile, etc.)
  64
  65                 @param rView
  66                 The changed view
  67              */
  68             virtual void viewChanged( const UnoViewSharedPtr& rView ) = 0;
  69
  70             /** Notify that all views changed.
  71
  72                 Reasons for a viewChanged notification can be
  73                 different view size, transformation, or other device
  74                 properties (color resolution or profile, etc.)
  75
  76                 Note that this method avoids hidden inefficiencies
  77                 (O(n^2) behaviour when viewChanged() needs to perform
  78                 linear searches)
  79              */
  80             virtual void viewsChanged() = 0;
  81         };
  82
  83         typedef ::std::shared_ptr< ViewEventHandler > ViewEventHandlerSharedPtr;
  84         typedef ::std::weak_ptr< ViewEventHandler >   ViewEventHandlerWeakPtr;
  85
  86     }
  87 }
  88
  89 #endif // INCLUDED_SLIDESHOW_SOURCE_INC_VIEWEVENTHANDLER_HXX
  90
  91 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */