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git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@52 0778d3d1-df1d-0410-868b-ea421aaaa00d
177 lines
3.1 KiB
C++
177 lines
3.1 KiB
C++
/*
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* graph.cpp - a QT widget for displaying and manipulating waveforms
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*
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* Copyright (c) 2006 Andreas Brandmaier <andy/at/brandmaier/dot/de>
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*
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* This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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*/
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#include "qt3support.h"
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#ifdef QT4
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#include <QPaintEvent>
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#include <QFontMetrics>
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#include <QPainter>
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#else
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#include <qfontmetrics.h>
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#include <qpainter.h>
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#endif
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#include "graph.h"
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#include <iostream>
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#include <cstdlib>
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using namespace std;
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graph::graph( const QString & _text, QWidget * _parent) :
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QWidget( _parent )
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{
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m_background = NULL;
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setFixedSize( 128, 101 );
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}
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graph::~graph()
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{
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// delete m_background;
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}
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void graph::setBackground( const QPixmap &_pixmap )
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{
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m_background = _pixmap;
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setErasePixmap ( m_background );
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}
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void graph::setSamplePointer( float * _pointer, int _length )
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{
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samplePointer = _pointer;
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sampleLength = _length;
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}
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void graph::mouseMoveEvent ( QMouseEvent * _me )
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{
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// get position
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int x = _me->x();
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if (x < 0) { return; }
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if (x > sampleLength) { return; }
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int y = _me->y();
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if (y < 0) { return; }
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if (y >= 100) { return; }
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y = 100 - y;
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samplePointer[x] = (y-50.0)/50.0;
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emit sampleChanged();
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}
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void graph::mousePressEvent( QMouseEvent * _me )
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{
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/* if( _me->button() == Qt::LeftButton )
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{
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toggle();
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}*/
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// get position
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int x = _me->x();
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if (x < 0) { return; }
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if (x > sampleLength) { return; }
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int y = _me->y();
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if (y < 0) { return; }
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if (y >= 100) { return; }
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y = 100 - y;
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samplePointer[x] = (y-50.0)/50.0;
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emit sampleChanged();
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}
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void sampleChanged() {}
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void graph::paintEvent( QPaintEvent * )
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{
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#ifdef QT4
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QPainter p( this );
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#else
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QPixmap draw_pm( rect().size() );
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draw_pm.fill( this, rect().topLeft() );
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QPainter p( &draw_pm, this );
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#endif
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// if (m_background != NULL) {
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p.drawPixmap( 0, 0, m_background );
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// }
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p.setPen( QColor( 0xFF, 0xAA, 0x00 ) );
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p.drawLine( sampleLength, 0, sampleLength, 100);
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// float xscale = 200.0 / sampleLength;
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float xscale = 1.0;
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for (int i=0; i < sampleLength-1; i++)
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{
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p.drawLine(static_cast<int>(i*xscale),
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static_cast<int>(-samplePointer[i]*50) + 50,
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static_cast<int>((i+1)*xscale),
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static_cast<int>(-samplePointer[i+1]*50 + 50)
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);
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}
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#ifndef QT4
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// and blit all the drawn stuff on the screen...
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bitBlt( this, rect().topLeft(), &draw_pm );
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#endif
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}
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#include "graph.moc"
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