include/graph.h

   1 /*
   2  * graph.h - a QT widget for displaying and manipulating waveforms
   3  *
   4  * Copyright (c) 2006-2007 Andreas Brandmaier <andy/at/brandmaier/dot/de>
   5  *               2008 Paul Giblock <drfaygo/at/gmail/dot/com>
   6  *
   7  * This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2 of the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public
  20  * License along with this program (see COPYING); if not, write to the
  21  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  22  * Boston, MA 02110-1301 USA.
  23  *
  24  */
  25
  26
  27 #ifndef _GRAPH_H
  28 #define _GRAPH_H
  29
  30 #include <QtGui/QWidget>
  31 #include <QtGui/QPixmap>
  32 #include <QtGui/QCursor>
  33
  34 #include "Model.h"
  35 #include "ModelView.h"
  36 #include "lmms_basics.h"
  37
  38 class graphModel;
  39
  40
  41 class EXPORT graph : public QWidget, public ModelView
  42 {
  43         Q_OBJECT
  44 public:
  45         enum graphStyle
  46         {
  47                 NearestStyle,
  48                 LinearStyle,
  49                 NumGraphStyles
  50         };
  51
  52         graph( QWidget * _parent, graphStyle _style = graph::LinearStyle );
  53         virtual ~graph();
  54
  55         void setForeground( const QPixmap & _pixmap );
  56
  57         void setGraphColor( const QColor );
  58
  59         inline graphModel * model()
  60         {
  61                 return castModel<graphModel>();
  62         }
  63
  64         inline graphStyle getGraphStyle()
  65         {
  66                 return m_graphStyle;
  67         }
  68
  69         inline void setGraphStyle( graphStyle _s )
  70         {
  71                 m_graphStyle = _s;
  72                 update();
  73         }
  74
  75
  76 protected:
  77         virtual void paintEvent( QPaintEvent * _pe );
  78         virtual void dropEvent( QDropEvent * _de );
  79         virtual void dragEnterEvent( QDragEnterEvent * _dee );
  80         virtual void mousePressEvent( QMouseEvent * _me );
  81         virtual void mouseMoveEvent( QMouseEvent * _me );
  82         virtual void mouseReleaseEvent( QMouseEvent * _me );
  83
  84 protected slots:
  85         void updateGraph( int _startPos, int _endPos );
  86         void updateGraph();
  87
  88 private:
  89         virtual void modelChanged();
  90
  91         void changeSampleAt(int _x, int _y);
  92
  93
  94         QPixmap m_foreground;
  95         QColor m_graphColor;
  96
  97         graphModel * m_graphModel;
  98         graphStyle m_graphStyle;
  99
 100         bool m_mouseDown;
 101         int m_lastCursorX;
 102
 103 } ;
 104
 105
 106 class EXPORT graphModel : public Model
 107 {
 108         Q_OBJECT
 109 public:
 110         graphModel( float _min,
 111                         float _max,
 112                         int _size,
 113                         :: Model * _parent,
 114                         bool _default_constructed = false,
 115                         float _step = 0.0 );
 116
 117         virtual ~graphModel();
 118
 119         // TODO: saveSettings, loadSettings?
 120
 121         inline float minValue() const
 122         {
 123                 return( m_minValue );
 124         }
 125
 126         inline float maxValue() const
 127         {
 128                 return( m_maxValue );
 129         }
 130
 131         inline int length() const
 132         {
 133                 return( m_samples.count() );
 134         }
 135
 136         inline const float * samples() const
 137         {
 138                 return( m_samples.data() );
 139         }
 140
 141 public slots:
 142         void setRange( float _min, float _max );
 143
 144         void setLength( int _size );
 145
 146         void setSampleAt( int _samplePos, float _value );
 147         void setSamples( const float * _value );
 148
 149         void setWaveToSine();
 150         void setWaveToTriangle();
 151         void setWaveToSaw();
 152         void setWaveToSquare();
 153         void setWaveToNoise();
 154         //void setWaveToUser( );
 155
 156         void smooth();
 157         void normalize();
 158
 159 signals:
 160         void lengthChanged();
 161         void samplesChanged( int startPos, int endPos );
 162         void rangeChanged();
 163
 164 private:
 165
 166         QVector<float> m_samples;
 167         float m_minValue;
 168         float m_maxValue;
 169         float m_step;
 170
 171         friend class graph;
 172
 173 };
 174
 175 #endif