view widgets/Thumbwheel.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 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 _THUMBWHEEL_H_
#define _THUMBWHEEL_H_

#include <QWidget>

class RangeMapper;

class Thumbwheel : public QWidget
{
    Q_OBJECT

public:
    Thumbwheel(Qt::Orientation orientation, QWidget *parent = 0);
    virtual ~Thumbwheel();

    int getMinimumValue() const;
    int getMaximumValue() const;
    int getDefaultValue() const;
    float getSpeed() const;
    bool getTracking() const;
    bool getShowScale() const;
    int getValue() const;

    void setRangeMapper(RangeMapper *mapper); // I take ownership, will delete
    const RangeMapper *getRangeMapper() const { return m_rangeMapper; }
    float getMappedValue() const;

    void setShowToolTip(bool show);

    QSize sizeHint() const;

signals:
    void valueChanged(int);

    void mouseEntered();
    void mouseLeft();

public slots:
    void setMinimumValue(int min);
    void setMaximumValue(int max);
    void setDefaultValue(int deft);
    void setSpeed(float speed);
    void setTracking(bool tracking);
    void setShowScale(bool show);
    void setValue(int value);
    void setMappedValue(float mappedValue);
    void scroll(bool up);
    void resetToDefault();

protected slots:
    void updateMappedValue(int value);

protected:
    virtual void mousePressEvent(QMouseEvent *e);
    virtual void mouseDoubleClickEvent(QMouseEvent *e);
    virtual void mouseMoveEvent(QMouseEvent *e);
    virtual void mouseReleaseEvent(QMouseEvent *e);
    virtual void wheelEvent(QWheelEvent *e);
    virtual void paintEvent(QPaintEvent *e);
    virtual void enterEvent(QEvent *);
    virtual void leaveEvent(QEvent *);

    int m_min;
    int m_max;
    int m_default;
    int m_value;
    float m_mappedValue;
    bool m_noMappedUpdate;
    float m_rotation;
    Qt::Orientation m_orientation;
    float m_speed;
    bool m_tracking;
    bool m_showScale;
    bool m_clicked;
    bool m_atDefault;
    QPoint m_clickPos;
    float m_clickRotation;
    bool m_showTooltip;
    RangeMapper *m_rangeMapper;
};

#endif