src/equalizergraph.h

   1 /***************************************************************************
   2  Graphical spline display for equalizer
   3
   4  (c) 2004 Mark Kretschmann <markey@web.de>
   5  Based on code from XMMS
   6  (c) 1998-2000 Peter Alm, Mikael Alm, Olle Hallnas, Thomas Nilsson and 4Front Technologies
   7 ***************************************************************************/
   8
   9 /***************************************************************************
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  ***************************************************************************/
  17
  18 #ifndef AMAROK_EQUALIZERGRAPH_H
  19 #define AMAROK_EQUALIZERGRAPH_H
  20
  21 #include <QtGui/QWidget>     //baseclass
  22
  23 class QPaintEvent;
  24 class QPixmap;
  25 class QResizeEvent;
  26
  27
  28 class EqualizerGraph : public QWidget
  29 {
  30     public:
  31         EqualizerGraph( QWidget* parent );
  32         ~EqualizerGraph();
  33         QSize sizeHint() const;
  34
  35     protected:
  36         void resizeEvent( QResizeEvent* );
  37         void paintEvent( QPaintEvent* );
  38
  39     private:
  40         static const int NUM_BANDS = 10;
  41
  42         void drawBackground();
  43
  44         void init_spline( float* x, float* y, int n, float* y2 );
  45         float eval_spline( float xa[], float ya[], float y2a[], int n, float x );
  46
  47         QPixmap* m_backgroundPixmap;
  48 };
  49
  50
  51 #endif /*AMAROK_EQUALIZERGRAPH_H*/