modules/gui/qt4/extensions_manager.hpp

   1 /*****************************************************************************
   2  * extensions_manager.hpp: Extensions manager for Qt
   3  ****************************************************************************
   4  * Copyright (C) 2009-2010 VideoLAN and authors
   5  * $Id$
   6  *
   7  * Authors: Jean-Philippe André < jpeg # videolan.org >
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #ifndef EXTENSIONS_MANAGER_HPP
  25 #define EXTENSIONS_MANAGER_HPP
  26
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <vlc_extensions.h>
  32
  33 #include "qt4.hpp"
  34
  35 #include <QObject>
  36 #include <QMenu>
  37 #include <QSignalMapper>
  38
  39 class ExtensionsDialogProvider;
  40
  41 class ExtensionsManager : public QObject
  42 {
  43     Q_OBJECT
  44 public:
  45     static ExtensionsManager *getInstance( intf_thread_t *_p_intf,
  46                                            QObject *_parent = 0 )
  47     {
  48         if( !instance )
  49             instance = new ExtensionsManager( _p_intf, _parent );
  50         return instance;
  51     }
  52     static void killInstance()
  53     {
  54         delete instance;
  55         instance = NULL;
  56     }
  57
  58     ExtensionsManager( intf_thread_t *p_intf, QObject *parent );
  59     virtual ~ExtensionsManager();
  60
  61     inline bool isLoaded() { return p_extensions_manager != NULL; }
  62     inline bool cannotLoad() { return b_unloading || b_failed; }
  63     inline bool isUnloading() { return b_unloading; }
  64     void menu( QMenu *current );
  65
  66     /** Get the extensions_manager_t if it is loaded and hold the object */
  67     extensions_manager_t* getManager()
  68     {
  69         if( !p_extensions_manager ) return NULL;
  70         vlc_object_hold( p_extensions_manager );
  71         return p_extensions_manager;
  72     }
  73
  74 public slots:
  75     bool loadExtensions();
  76     void unloadExtensions();
  77     void reloadExtensions();
  78
  79 private slots:
  80     void triggerMenu( int id );
  81     void inputChanged( input_thread_t *p_input );
  82     void playingChanged( int );
  83     void metaChanged( input_item_t *p_input );
  84
  85 private:
  86     static ExtensionsManager* instance;
  87     intf_thread_t *p_intf;
  88     extensions_manager_t *p_extensions_manager;
  89     ExtensionsDialogProvider *p_edp;
  90
  91     QSignalMapper *menuMapper;
  92     bool b_unloading;  ///< Work around threads + emit issues, see isUnloading
  93     bool b_failed; ///< Flag set to true if we could not load the module
  94
  95 signals:
  96     void extensionsUpdated();
  97 };
  98
  99 #endif // EXTENSIONS_MANAGER_HPP