view layer/LayerFactory.h @ 1386:fc3d89f88690 spectrogramparam

Use log-frequency rather than log-bin for calculating x coord in spectrum. This has the advantage that frequency positions don't move when we change the window size or oversampling ratio, but it does give us an unhelpfully large amount of space for very low frequencies - to be considered

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006 Chris Cannam.
    
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef SV_LAYER_FACTORY_H
#define SV_LAYER_FACTORY_H

#include <QString>
#include <set>

class Layer;
class Model;
class Clipboard;

class LayerFactory
{
public:
    enum LayerType {

        // Standard layers
        Waveform,
        Spectrogram,
        TimeRuler,
        TimeInstants,
        TimeValues,
        Notes,
        FlexiNotes,
        Regions,
        Text,
        Image,
        Colour3DPlot,
        Spectrum,
        Slice,

        // Layers with different initial parameters
        MelodicRangeSpectrogram,
        PeakFrequencySpectrogram,

        // Not-a-layer-type
        UnknownLayer = 255
    };

    static LayerFactory *getInstance();
    
    virtual ~LayerFactory();

    typedef std::set<LayerType> LayerTypeSet;
    LayerTypeSet getValidLayerTypes(Model *model);

    /**
     * Return the set of layer types that an end user should be
     * allowed to create, empty, for subsequent editing.
     */
    LayerTypeSet getValidEmptyLayerTypes();

    LayerType getLayerType(const Layer *);

    Layer *createLayer(LayerType type);

    void setLayerDefaultProperties(LayerType type, Layer *layer);

    QString getLayerPresentationName(LayerType type);

    bool isLayerSliceable(const Layer *);

    void setModel(Layer *layer, Model *model);
    Model *createEmptyModel(LayerType type, Model *baseModel);

    int getChannel(Layer *layer);
    void setChannel(Layer *layer, int channel);

    QString getLayerIconName(LayerType);
    QString getLayerTypeName(LayerType);
    LayerType getLayerTypeForName(QString);

    LayerType getLayerTypeForClipboardContents(const Clipboard &);

protected:
    template <typename LayerClass, typename ModelClass>
    bool trySetModel(Layer *layerBase, Model *modelBase) {
        LayerClass *layer = dynamic_cast<LayerClass *>(layerBase);
        if (!layer) return false;
        ModelClass *model = dynamic_cast<ModelClass *>(modelBase);
        if (!model) return false;
        layer->setModel(model);
        return true;
    }

    static LayerFactory *m_instance;
};

#endif