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1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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2
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3 /*
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4 Sonic Visualiser
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5 An audio file viewer and annotation editor.
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6 Centre for Digital Music, Queen Mary, University of London.
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7
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8 This program is free software; you can redistribute it and/or
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9 modify it under the terms of the GNU General Public License as
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10 published by the Free Software Foundation; either version 2 of the
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11 License, or (at your option) any later version. See the file
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12 COPYING included with this distribution for more information.
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13 */
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14
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15 #ifndef FADER_H
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16 #define FADER_H
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17
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18 /**
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19 * Horizontal audio fader and meter widget.
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20 * Based on the vertical fader and meter widget from:
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21 *
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22 * Hydrogen
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23 * Copyright(c) 2002-2005 by Alex >Comix< Cominu [comix@users.sourceforge.net]
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24 * http://www.hydrogen-music.org
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25 */
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26
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27
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28 #include <string>
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29 #include <iostream>
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30
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31 #include <QWidget>
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32 #include <QPixmap>
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33 #include <QMouseEvent>
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34 #include <QWheelEvent>
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35 #include <QPaintEvent>
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36
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37 class Fader : public QWidget
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38 {
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39 Q_OBJECT
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40
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41 public:
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42 Fader(QWidget *parent, bool withoutKnob = false);
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43 ~Fader();
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44
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45 void setValue(float newValue);
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46 float getValue();
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47
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48 void setPeakLeft(float);
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49 float getPeakLeft() { return m_peakLeft; }
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50
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51 void setPeakRight(float);
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52 float getPeakRight() { return m_peakRight; }
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53
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54 signals:
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55 void valueChanged(float); // 0.0 -> 1.0
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56
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57 void mouseEntered();
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58 void mouseLeft();
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59
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60 protected:
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61 virtual void mousePressEvent(QMouseEvent *ev);
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62 virtual void mouseDoubleClickEvent(QMouseEvent *ev);
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63 virtual void mouseMoveEvent(QMouseEvent *ev);
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64 virtual void mouseReleaseEvent(QMouseEvent *ev);
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65 virtual void wheelEvent( QWheelEvent *ev );
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66 virtual void paintEvent(QPaintEvent *ev);
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67 virtual void enterEvent(QEvent *);
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68 virtual void leaveEvent(QEvent *);
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69
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70 int getMaxX() const;
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71
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72 bool m_withoutKnob;
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73 float m_value;
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74 float m_peakLeft;
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75 float m_peakRight;
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76
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77 bool m_mousePressed;
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78 int m_mousePressX;
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79 float m_mousePressValue;
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80
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81 QPixmap m_back;
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82 QPixmap m_leds;
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83 QPixmap m_knob;
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84 QPixmap m_clip;
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85 };
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86
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87 #endif
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