Chris@49: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@0: 
Chris@0: /*
Chris@52:     Sonic Visualiser
Chris@52:     An audio file viewer and annotation editor.
Chris@52:     Centre for Digital Music, Queen Mary, University of London.
Chris@52:     This file copyright 2006 Chris Cannam.
Chris@0:    
Chris@52:     This program is free software; you can redistribute it and/or
Chris@52:     modify it under the terms of the GNU General Public License as
Chris@52:     published by the Free Software Foundation; either version 2 of the
Chris@52:     License, or (at your option) any later version.  See the file
Chris@52:     COPYING included with this distribution for more information.
Chris@0: */
Chris@0: 
Chris@0: #ifndef _TRANSFORM_FACTORY_H_
Chris@0: #define _TRANSFORM_FACTORY_H_
Chris@0: 
Chris@0: #include "Transform.h"
Chris@0: 
Chris@16: #include <map>
Chris@16: 
Chris@0: class TransformFactory : public QObject
Chris@0: {
Chris@0:     Q_OBJECT
Chris@0: 
Chris@0: public:
Chris@0:     virtual ~TransformFactory();
Chris@0: 
Chris@0:     static TransformFactory *instance();
Chris@0: 
Chris@56:     // The name is intended to be computer-referenceable, and unique
Chris@47:     // within the application.  The description is intended to be
Chris@47:     // human readable.  In principle it doesn't have to be unique, but
Chris@47:     // the factory will add suffixes to ensure that it is, all the
Chris@47:     // same (just to avoid user confusion).
Chris@0: 
Chris@0:     struct TransformDesc {
Chris@56:         TransformDesc() { }
Chris@56: 	TransformDesc(TransformName _name, QString _description, bool _configurable) :
Chris@56: 	    name(_name), description(_description), configurable(_configurable) { }
Chris@0: 	TransformName name;
Chris@0: 	QString description;
Chris@56:         bool configurable;
Chris@0:     };
Chris@0:     typedef std::vector<TransformDesc> TransformList;
Chris@0: 
Chris@0:     TransformList getAllTransforms();
Chris@0: 
Chris@0:     /**
Chris@56:      * Get a configuration XML string for the given transform (by
Chris@56:      * asking the user, most likely).  Returns true if the transform
Chris@56:      * is acceptable, false if the operation should be cancelled.
Chris@56:      */
Chris@56:     bool getConfigurationForTransform(TransformName name, Model *inputModel,
Chris@56:                                       QString &configurationXml);
Chris@56: 
Chris@56:     /**
Chris@0:      * Return the output model resulting from applying the named
Chris@0:      * transform to the given input model.  The transform may still be
Chris@0:      * working in the background when the model is returned; check the
Chris@0:      * output model's isReady completion status for more details.
Chris@0:      *
Chris@0:      * If the transform is unknown or the input model is not an
Chris@0:      * appropriate type for the given transform, or if some other
Chris@0:      * problem occurs, return 0.
Chris@0:      * 
Chris@0:      * The returned model is owned by the caller and must be deleted
Chris@0:      * when no longer needed.
Chris@0:      */
Chris@56:     Model *transform(TransformName name, Model *inputModel,
Chris@56:                      QString configurationXml = "");
Chris@0: 
Chris@18:     /**
Chris@18:      * Full description of a transform, suitable for putting on a menu.
Chris@18:      */
Chris@16:     QString getTransformDescription(TransformName name);
Chris@16: 
Chris@18:     /**
Chris@18:      * Brief but friendly description of a transform, suitable for use
Chris@18:      * as the name of the output layer.
Chris@18:      */
Chris@18:     QString getTransformFriendlyName(TransformName name);
Chris@18: 
Chris@57:     /**
Chris@57:      * Return true if the transform has any configurable parameters,
Chris@57:      * i.e. if getConfigurationForTransform can ever return a non-trivial
Chris@57:      * (not equivalent to empty) configuration string.
Chris@57:      */
Chris@57:     bool isTransformConfigurable(TransformName name);
Chris@57: 
Chris@0:     //!!! Need some way to indicate that the input model has changed /
Chris@0:     //been deleted so as not to blow up backgrounded transform!  -- Or
Chris@0:     //indeed, if the output model has been deleted -- could equally
Chris@0:     //well happen!
Chris@0: 
Chris@0:     //!!! Need transform category!
Chris@0: 	
Chris@0: protected slots:
Chris@0:     void transformFinished();
Chris@0: 
Chris@0: protected:
Chris@0:     Transform *createTransform(TransformName name, Model *inputModel,
Chris@56:                                QString configurationXml, bool start);
Chris@0: 
Chris@56:     struct TransformIdent
Chris@56:     {
Chris@56:         TransformName name;
Chris@56:         QString configurationXml;
Chris@56:     };
Chris@56: 
Chris@56:     typedef std::map<TransformName, QString> TransformConfigurationMap;
Chris@56:     TransformConfigurationMap m_lastConfigurations;
Chris@56: 
Chris@56:     typedef std::map<TransformName, TransformDesc> TransformDescriptionMap;
Chris@56:     TransformDescriptionMap m_transforms;
Chris@56: 
Chris@16:     void populateTransforms();
Chris@16: 
Chris@0:     static TransformFactory *m_instance;
Chris@0: };
Chris@0: 
Chris@0: 
Chris@0: #endif