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1 /* -*- c-basic-offset: 4 -*- vi:set ts=8 sts=4 sw=4: */
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2
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3 /*
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4 A waveform viewer and audio annotation editor.
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5 Chris Cannam, Queen Mary University of London, 2005
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6
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7 This is experimental software. Not for distribution.
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8 */
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9
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10 #ifndef FADER_H
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11 #define FADER_H
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12
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13 /**
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14 * Horizontal audio fader and meter widget.
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15 * Based on the vertical fader and meter widget from:
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16 *
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17 * Hydrogen
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18 * Copyright(c) 2002-2005 by Alex >Comix< Cominu [comix@users.sourceforge.net]
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19 *
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20 * http://www.hydrogen-music.org
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21 *
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22 * This program is free software; you can redistribute it and/or modify
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23 * it under the terms of the GNU General Public License as published by
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24 * the Free Software Foundation; either version 2 of the License, or
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25 * (at your option) any later version.
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26 *
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27 * This program is distributed in the hope that it will be useful,
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28 * but WITHOUT ANY WARRANTY, without even the implied warranty of
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29 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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30 * GNU General Public License for more details.
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31 *
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32 * You should have received a copy of the GNU General Public License
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33 * along with this program; if not, write to the Free Software
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34 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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35 *
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36 * $Id: Fader.h,v 1.14 2005/08/10 08:03:30 comix Exp $
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37 */
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38
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39
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40 #include <string>
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41 #include <iostream>
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42
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43 #include <QWidget>
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44 #include <QPixmap>
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45 #include <QMouseEvent>
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46 #include <QWheelEvent>
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47 #include <QPaintEvent>
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48
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49 class Fader : public QWidget
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50 {
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51 Q_OBJECT
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52
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53 public:
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54 Fader(QWidget *parent, bool withoutKnob = false);
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55 ~Fader();
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56
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57 void setValue(float newValue);
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58 float getValue();
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59
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60 void setPeakLeft(float);
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61 float getPeakLeft() { return m_peakLeft; }
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62
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63 void setPeakRight(float);
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64 float getPeakRight() { return m_peakRight; }
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65
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66 virtual void mousePressEvent(QMouseEvent *ev);
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67 virtual void mouseDoubleClickEvent(QMouseEvent *ev);
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68 virtual void mouseMoveEvent(QMouseEvent *ev);
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69 virtual void wheelEvent( QWheelEvent *ev );
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70 virtual void paintEvent(QPaintEvent *ev);
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71
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72 signals:
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73 void valueChanged(float); // 0.0 -> 1.0
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74
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75 private:
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76 bool m_withoutKnob;
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77 float m_value;
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78 float m_peakLeft;
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79 float m_peakRight;
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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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