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1/**********************************************************************
2** Copyright (C) 2000-2002 Trolltech AS. All rights reserved.
3**
4** This file is part of the Qtopia Environment.
5**
6** This file may be distributed and/or modified under the terms of the
7** GNU General Public License version 2 as published by the Free Software
8** Foundation and appearing in the file LICENSE.GPL included in the
9** packaging of this file.
10**
11** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
12** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
13**
14** See http://www.trolltech.com/gpl/ for GPL licensing information.
15**
16** Contact info@trolltech.com if any conditions of this licensing are
17** not clear to you.
18**
19**********************************************************************/
20#ifndef WAVEFORM_H
21#define WAVEFORM_H
22
23#include <qwidget.h>
24#include <qpixmap.h>
25
26
27class QLabel;
28
29
30class Waveform : public QWidget
31{
32public:
33 Waveform( QWidget *parent=0, const char *name=0, WFlags fl=0 );
34 ~Waveform();
35
36public:
37 void changeSettings( int frequency, int channels );
38 void reset();
39 void newSamples( const short *buf, int len );
40
41private:
42
43 void makePixmap();
44 void draw();
45
46protected:
47
48 void paintEvent( QPaintEvent *event );
49
50private:
51 int samplesPerPixel;
52 int currentValue;
53 int numSamples;
54 short *window;
55 int windowPosn;
56 int windowSize;
57 QPixmap *pixmap;
58
59};
60
61
62#endif
63