view layer/TextLayer.h @ 349:369a197737c7

* Various fixes to object lifetime management, particularly in the spectrum
  layer and for notification of main model deletion.
  The main purpose of this is to improve the behaviour of the spectrum, but I
  think it may also help with #1840922 Various crashes in Layer Summary window.

/* -*- 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 _TEXT_LAYER_H_
#define _TEXT_LAYER_H_

#include "SingleColourLayer.h"
#include "data/model/TextModel.h"

#include <QObject>
#include <QColor>

class View;
class QPainter;

class TextLayer : public SingleColourLayer
{
    Q_OBJECT

public:
    TextLayer();

    virtual void paint(View *v, QPainter &paint, QRect rect) const;

    virtual QString getFeatureDescription(View *v, QPoint &) const;

    virtual bool snapToFeatureFrame(View *v, int &frame,
				    size_t &resolution,
				    SnapType snap) const;

    virtual void drawStart(View *v, QMouseEvent *);
    virtual void drawDrag(View *v, QMouseEvent *);
    virtual void drawEnd(View *v, QMouseEvent *);

    virtual void eraseStart(View *v, QMouseEvent *);
    virtual void eraseDrag(View *v, QMouseEvent *);
    virtual void eraseEnd(View *v, QMouseEvent *);

    virtual void editStart(View *v, QMouseEvent *);
    virtual void editDrag(View *v, QMouseEvent *);
    virtual void editEnd(View *v, QMouseEvent *);

    virtual void moveSelection(Selection s, size_t newStartFrame);
    virtual void resizeSelection(Selection s, Selection newSize);
    virtual void deleteSelection(Selection s);

    virtual void copy(Selection s, Clipboard &to);
    virtual bool paste(const Clipboard &from, int frameOffset,
                       bool interactive);

    virtual bool editOpen(View *, QMouseEvent *); // on double-click

    virtual const Model *getModel() const { return m_model; }
    void setModel(TextModel *model);

    virtual PropertyList getProperties() const;
    virtual QString getPropertyLabel(const PropertyName &) const;
    virtual PropertyType getPropertyType(const PropertyName &) const;
    virtual int getPropertyRangeAndValue(const PropertyName &,
                                         int *min, int *max, int *deflt) const;
    virtual QString getPropertyValueLabel(const PropertyName &,
					  int value) const;
    virtual void setProperty(const PropertyName &, int value);

    virtual bool isLayerScrollable(const View *v) const;

    virtual bool isLayerEditable() const { return true; }

    virtual int getCompletion(View *) const { return m_model->getCompletion(); }

    virtual bool getValueExtents(float &min, float &max,
                                 bool &logarithmic, QString &unit) const;

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

    void setProperties(const QXmlAttributes &attributes);

protected:
    int getYForHeight(View *v, float height) const;
    float getHeightForY(View *v, int y) const;

    virtual int getDefaultColourHint(bool dark, bool &impose);

    TextModel::PointList getLocalPoints(View *v, int x, int y) const;

    TextModel *m_model;
    bool m_editing;
    QPoint m_editOrigin;
    TextModel::Point m_originalPoint;
    TextModel::Point m_editingPoint;
    TextModel::EditCommand *m_editingCommand;
};

#endif