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
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18*b1cdbd2cSJim Jagielski  * under the License.
19*b1cdbd2cSJim Jagielski  *
20*b1cdbd2cSJim Jagielski  *************************************************************/
21*b1cdbd2cSJim Jagielski 
22*b1cdbd2cSJim Jagielski 
23*b1cdbd2cSJim Jagielski 
24*b1cdbd2cSJim Jagielski #include "precompiled_sd.hxx"
25*b1cdbd2cSJim Jagielski 
26*b1cdbd2cSJim Jagielski #include "slideshow.hxx"
27*b1cdbd2cSJim Jagielski #include "ViewShellBase.hxx"
28*b1cdbd2cSJim Jagielski #include <rtl/ref.hxx>
29*b1cdbd2cSJim Jagielski #include <tools/link.hxx>
30*b1cdbd2cSJim Jagielski #include <boost/enable_shared_from_this.hpp>
31*b1cdbd2cSJim Jagielski 
32*b1cdbd2cSJim Jagielski namespace sd {
33*b1cdbd2cSJim Jagielski 
34*b1cdbd2cSJim Jagielski /** This class is used when a display is removed or added to restart the
35*b1cdbd2cSJim Jagielski     slide show.  This is necessary at least with DirectX because
36*b1cdbd2cSJim Jagielski     deactivating a display invalidates DirectX resources.  Accessing those
37*b1cdbd2cSJim Jagielski     leads to a crash.
38*b1cdbd2cSJim Jagielski 
39*b1cdbd2cSJim Jagielski     During a restart a possibly installed presenter extension is given the
40*b1cdbd2cSJim Jagielski     oportunity to show or hide depending on the number of available displays.
41*b1cdbd2cSJim Jagielski */
42*b1cdbd2cSJim Jagielski class SlideShowRestarter
43*b1cdbd2cSJim Jagielski     : public boost::enable_shared_from_this<SlideShowRestarter>
44*b1cdbd2cSJim Jagielski {
45*b1cdbd2cSJim Jagielski public:
46*b1cdbd2cSJim Jagielski     /** Create a new SlideShowRestarter object.
47*b1cdbd2cSJim Jagielski         @param rpSlideShow
48*b1cdbd2cSJim Jagielski             The slide show is used to determine the current slide, which is
49*b1cdbd2cSJim Jagielski             restored after the restart, and of course to stop and start the
50*b1cdbd2cSJim Jagielski             slide show.
51*b1cdbd2cSJim Jagielski         @param pViewShellBase
52*b1cdbd2cSJim Jagielski             Used to get access to a slot dispatcher.
53*b1cdbd2cSJim Jagielski     */
54*b1cdbd2cSJim Jagielski     SlideShowRestarter (
55*b1cdbd2cSJim Jagielski         const ::rtl::Reference<SlideShow>& rpSlideShow,
56*b1cdbd2cSJim Jagielski         ViewShellBase* pViewShellBase);
57*b1cdbd2cSJim Jagielski     virtual ~SlideShowRestarter (void);
58*b1cdbd2cSJim Jagielski 
59*b1cdbd2cSJim Jagielski     /** Restarting the slide show is an asynchronous multi step process
60*b1cdbd2cSJim Jagielski         which is started by calling this method.
61*b1cdbd2cSJim Jagielski     */
62*b1cdbd2cSJim Jagielski     void Restart (void);
63*b1cdbd2cSJim Jagielski 
64*b1cdbd2cSJim Jagielski private:
65*b1cdbd2cSJim Jagielski     sal_Int32 mnEventId;
66*b1cdbd2cSJim Jagielski     ::rtl::Reference<SlideShow> mpSlideShow;
67*b1cdbd2cSJim Jagielski     ViewShellBase* mpViewShellBase;
68*b1cdbd2cSJim Jagielski     ::boost::shared_ptr<SlideShowRestarter> mpSelf;
69*b1cdbd2cSJim Jagielski     sal_Int32 mnDisplayCount;
70*b1cdbd2cSJim Jagielski     SfxDispatcher* mpDispatcher;
71*b1cdbd2cSJim Jagielski     sal_Int32 mnCurrentSlideNumber;
72*b1cdbd2cSJim Jagielski 
73*b1cdbd2cSJim Jagielski     /** The display count is used to determine whether the number of
74*b1cdbd2cSJim Jagielski         displays has changed and thus whether restarting the slide show is
75*b1cdbd2cSJim Jagielski         really necessary.
76*b1cdbd2cSJim Jagielski     */
77*b1cdbd2cSJim Jagielski     sal_Int32 GetDisplayCount (void);
78*b1cdbd2cSJim Jagielski 
79*b1cdbd2cSJim Jagielski     DECL_LINK(EndPresentation, void*);
80*b1cdbd2cSJim Jagielski 
81*b1cdbd2cSJim Jagielski     /** Restart the presentation on the slide last shown before the restart
82*b1cdbd2cSJim Jagielski         was initiated.
83*b1cdbd2cSJim Jagielski     */
84*b1cdbd2cSJim Jagielski     void StartPresentation (void);
85*b1cdbd2cSJim Jagielski };
86*b1cdbd2cSJim Jagielski 
87*b1cdbd2cSJim Jagielski } // end of namespace sd
88