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156 lines
4.2 KiB
156 lines
4.2 KiB
// KDat - a tar-based DAT archiver
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// Copyright (C) 1998-2000 Sean Vyain, svyain@mail.tds.net
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// Copyright (C) 2001-2002 Lawrence Widman, kdat@cardiothink.com
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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#ifndef _TapeManager_h_
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#define _TapeManager_h_
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#include <tqdict.h>
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#include <tqobject.h>
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#include <tqstrlist.h>
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#include "Tape.h"
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/**
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* @short Control access to the set of tape indexes.
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*
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* Each user has a set of tape indexes that are stored under
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* <TT>$HOME/.kdat/</TT>. This class provides a single point of access for
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* reading and writing these index files.
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*
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* Other objects can register to be notified when a tape index is added or
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* removed, and when a tape index is modified.
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*
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* A reference to the index of the currently mounted tape is maintained, and
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* other objects can register to be notified when a tape is mounted and
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* unmounted.
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*
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* The TapeManager follows the Singleton pattern.
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*/
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class TapeManager : public TQObject {
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Q_OBJECT
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TQ_OBJECT
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static TapeManager* _instance;
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TQDict<Tape> _tapes;
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TQStringList _tapeIDs;
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Tape* _mountedTape;
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TapeManager();
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public:
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~TapeManager();
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/**
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* All access to the TapeManager goes through this method.
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*
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* @return a pointer to the single instance of the TapeManager.
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*/
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static TapeManager* instance();
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/**
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* Get the list of all known tape IDs.
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*
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* @return a TQStringList containing the tape IDs.
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*/
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const TQStringList& getTapeIDs();
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/**
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* Retrieve the index for a tape.
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*
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* @param id the ID of the tape.
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* @return the tape's index.
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*/
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Tape* findTape( const TQString & id );
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/**
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* Add a new tape index.
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*
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* @param tape a pointer to the new tape index.
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*/
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void addTape( Tape* tape );
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/**
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* Remove a tape index. The tape index is removed from memory and from
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* disk. A signal is emitted before the tape is actually removed.
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*
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* @param tape a pointer to the tape index to remove.
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*/
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void removeTape( Tape* tape );
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/**
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* Notify anyone who cares that the tape index has been modified.
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*
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* @param tape a pointer to the tape index that was modified.
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*/
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void tapeModified( Tape* tape );
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/**
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* Call this method whenever a tape is first mounted.
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*
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* @param tape a pointer to the newly mounted tape's index.
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*/
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void mountTape( Tape* tape );
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/**
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* Call this method whenever the current tape is about to be unmounted.
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*/
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void unmountTape();
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/**
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* Get a handle on the currently mounted tape's index.
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*
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* @return a pointer to the mounted tape's index, or NULL if no tape is
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* mounted.
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*/
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Tape* getMountedTape();
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signals:
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/**
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* Emitted after a new tape index is created.
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*
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* @param tape a pointer to the new tape index.
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*/
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void sigTapeAdded( Tape* tape );
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/**
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* Emitted before a tape index is destroyed. This signal is emitted
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* immediately before the tape index is deleted.
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*
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* @param tape a pointer to the tape index that is about to be destroyed.
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*/
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void sigTapeRemoved( Tape* tape );
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/**
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* Emitted after a tape index has been changed in some way.
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*
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* @param tape a pointer to the tape index that has been modified.
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*/
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void sigTapeModified( Tape* tape );
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/**
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* Emitted after a tape has been mounted.
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*/
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void sigTapeMounted();
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/**
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* Emitted just before the current tape is unmounted.
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*/
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void sigTapeUnmounted();
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};
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#endif
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