view widgets/Fader.h @ 333:e74b56f07c73

* Some work on correct alignment when moving panes during playback * Overhaul alignment for playback frame values (view manager now always refers to reference-timeline values, only the play source deals in playback model timeline values) * When making a selection, ensure the selection regions shown in other panes (and used for playback constraints if appropriate) are aligned correctly. This may be the coolest feature ever implemented in any program ever.
author Chris Cannam
date Thu, 22 Nov 2007 14:17:19 +0000
parents 8c00a4d4fc69
children 1fe7951a61e8
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/* -*- 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 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 FADER_H
#define FADER_H

/**
 * Horizontal audio fader and meter widget.
 * Based on the vertical fader and meter widget from:
 * 
 * Hydrogen
 * Copyright(c) 2002-2005 by Alex >Comix< Cominu [comix@users.sourceforge.net]
 * http://www.hydrogen-music.org
 */


#include <string>
#include <iostream>

#include <QWidget>
#include <QPixmap>
#include <QMouseEvent>
#include <QWheelEvent>
#include <QPaintEvent>

class Fader : public QWidget
{
    Q_OBJECT

public:
    Fader(QWidget *parent, bool withoutKnob = false);
    ~Fader();

    void setValue(float newValue);
    float getValue();

    void setPeakLeft(float);
    float getPeakLeft() { return m_peakLeft; }

    void setPeakRight(float);
    float getPeakRight() { return m_peakRight; }

signals:
    void valueChanged(float); // 0.0 -> 1.0

    void mouseEntered();
    void mouseLeft();

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

    int getMaxX() const;

    bool m_withoutKnob;
    float m_value;
    float m_peakLeft;
    float m_peakRight;

    bool m_mousePressed;
    int m_mousePressX;
    float m_mousePressValue;

    QPixmap m_back;
    QPixmap m_leds;
    QPixmap m_knob;
    QPixmap m_clip;
};

#endif