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0001 /****************************************************************************************
0002  * Copyright (c) 2009 Alejandro Wainzinger <aikawarazuni@gmail.com>                     *
0003  *                                                                                      *
0004  * This program is free software; you can redistribute it and/or modify it under        *
0005  * the terms of the GNU General Public License as published by the Free Software        *
0006  * Foundation; either version 2 of the License, or (at your option) any later           *
0007  * version.                                                                             *
0008  *                                                                                      *
0009  * This program is distributed in the hope that it will be useful, but WITHOUT ANY      *
0010  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A      *
0011  * PARTICULAR PURPOSE. See the GNU General Public License for more details.             *
0012  *                                                                                      *
0013  * You should have received a copy of the GNU General Public License along with         *
0014  * this program.  If not, see <http://www.gnu.org/licenses/>.                           *
0015  ****************************************************************************************/
0016 
0017 #ifndef CONNECTIONASSISTANT_H
0018 #define CONNECTIONASSISTANT_H
0019 
0020 #include "mediadevicecollection_export.h"
0021 
0022 #include <QObject>
0023 
0024 class MediaDeviceInfo;
0025 
0026 class QString;
0027 
0028 /**
0029 @class ConnectionAssistant
0030 
0031 The ConnectionAssistant (CA) serves as a way for MediaDeviceCollectionFactory to register its
0032 device type with the MediaDeviceMonitor (MDM). Once registered, the MDM can use the CA to
0033 attempt to identify a newly plugged-in device, and retrieve the MediaDeviceInfo object necessary
0034 for the Factory to connect to it.
0035 
0036 */
0037 
0038 class MEDIADEVICECOLLECTION_EXPORT ConnectionAssistant : public QObject
0039 {
0040     Q_OBJECT
0041     
0042 public:
0043 
0044     ~ConnectionAssistant() override;
0045 
0046     /**
0047 
0048     identify checks if a device identified by @param udi matches the type
0049     of device described by this ConnectionAssistant
0050     
0051     */
0052     virtual bool identify( const QString& udi );
0053 
0054     /**
0055 
0056     deviceInfo returns a pointer to a new MediaDeviceInfo of the type of device
0057     described by this ConnectionAssistant
0058 
0059     */
0060 
0061     virtual MediaDeviceInfo* deviceInfo( const QString& udi );
0062 
0063     bool wait();
0064 
0065     // Simply Q_EMIT identified( info )
0066     virtual void tellIdentified( const QString &udi );
0067     virtual void tellDisconnected( const QString &udi );
0068 
0069 protected:
0070 
0071     /*
0072      * Constructor
0073      * @param wait whether or not to wait to identify this device,
0074      * to give other types of devices a chance to claim this device
0075      * type during autodetection
0076      */
0077     ConnectionAssistant( bool wait = false );
0078 
0079 Q_SIGNALS:
0080 
0081     /**
0082 
0083     identified is emitted when identify returns true, and the device type's Factory
0084     has a slot that then attempts to connect to the device
0085 
0086     */
0087      void identified( MediaDeviceInfo* info );
0088 
0089      /**
0090 
0091      disconnected is emitted when a device with a given @param udi
0092      has been disconnected.  The device type's factory should then
0093      destroy the Collection appropriately
0094 
0095      */
0096 
0097      void disconnected( const QString &udi );
0098 
0099 private:
0100      bool m_wait;
0101 
0102 };
0103 
0104 #endif // CONNECTIONASSISTANT_H