view data/model/AggregateWaveModel.h @ 1455:ec9e65fcf749

The use of the begin/end pairs here just seems to cause too many rows to be deleted (from the visual representation, not the underlying model). Things apparently work better if we just modify the underlying model and let the change signals percolate back up again. To that end, update the change handlers so as to cover their proper ranges with dataChanged signals.

/* -*- 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 2007 QMUL.
    
    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 _AGGREGATE_WAVE_MODEL_H_
#define _AGGREGATE_WAVE_MODEL_H_

#include "RangeSummarisableTimeValueModel.h"
#include "PowerOfSqrtTwoZoomConstraint.h"

#include <vector>

class AggregateWaveModel : public RangeSummarisableTimeValueModel
{
    Q_OBJECT

public:
    struct ModelChannelSpec
    {
        ModelChannelSpec(RangeSummarisableTimeValueModel *m, int c) :
            model(m), channel(c) { }
        RangeSummarisableTimeValueModel *model;
        int channel;
    };

    typedef std::vector<ModelChannelSpec> ChannelSpecList;

    AggregateWaveModel(ChannelSpecList channelSpecs);
    ~AggregateWaveModel();

    bool isOK() const;
    bool isReady(int *) const;

    QString getTypeName() const { return tr("Aggregate Wave"); }

    int getComponentCount() const;
    ModelChannelSpec getComponent(int c) const;

    const ZoomConstraint *getZoomConstraint() const { return &m_zoomConstraint; }

    sv_frame_t getFrameCount() const;
    int getChannelCount() const;
    sv_samplerate_t getSampleRate() const;

    float getValueMinimum() const { return -1.0f; }
    float getValueMaximum() const { return  1.0f; }

    virtual sv_frame_t getStartFrame() const { return 0; }
    virtual sv_frame_t getEndFrame() const { return getFrameCount(); }

    virtual floatvec_t getData(int channel, sv_frame_t start, sv_frame_t count) const;

    virtual std::vector<floatvec_t> getMultiChannelData(int fromchannel, int tochannel, sv_frame_t start, sv_frame_t count) const;

    virtual int getSummaryBlockSize(int desired) const;

    virtual void getSummaries(int channel, sv_frame_t start, sv_frame_t count,
                              RangeBlock &ranges,
                              int &blockSize) const;

    virtual Range getSummary(int channel, sv_frame_t start, sv_frame_t count) const;

    virtual void toXml(QTextStream &out,
                       QString indent = "",
                       QString extraAttributes = "") const;

signals:
    void modelChanged();
    void modelChangedWithin(sv_frame_t, sv_frame_t);
    void completionChanged();
    void modelInvalidated();

protected slots:
    void componentModelChanged();
    void componentModelChangedWithin(sv_frame_t, sv_frame_t);
    void componentModelCompletionChanged();
    void componentModelAboutToBeDeleted();

protected:
    ChannelSpecList m_components;
    static PowerOfSqrtTwoZoomConstraint m_zoomConstraint;
    bool m_invalidated; // because one of its component models is aboutToBeDeleted
};

#endif