swspectrumwidget.cpp

/***************************************************************************
 
    source::worx raDIYo
    Copyright © 2020-2022 c.holzheuer
    c.holzheuer@sourceworx.org
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
 
***************************************************************************/
 
 
#include <QDebug>
#include <QPainter>
#include <QRandomGenerator>
#include <swspectrumwidget.h>
 
 
SWSpectrumWidget::SWSpectrumWidget( QWidget* parent )
    : SWAbstractBarWidget( parent )
{
 
    setNumBarsBlocks( 16, 16 );
    _valueList.resize( _numBars );
 
 
    //connect( &_timer, &QTimer::timeout, this, &SWSpectrumWidget::onTimer );
    //_timer.start( 100 );
 
 
}
 
void SWSpectrumWidget::onTimer()
{
    //qDebug() << "onTimer()";
    /*
    for( int i=0; i < _numBars; ++i )
    {
        double xx = (double) QRandomGenerator::global()->bounded( -7, +7 );
        _valueList[i] = 0.7 + xx/10;
    }
    */
    //update();
}
 
 
void SWSpectrumWidget::paintEvent( QPaintEvent* event )
{
 
    Q_UNUSED( event )
    Q_ASSERT( _colors.size() >= _maxNumBarsBlocks );
 
    QPainter painter( this );
    painter.setBackgroundMode( Qt::TransparentMode );
    //painter.fillRect(rect(), Qt::darkGray);
 
    // Draw the bars
 
    // der Rand wird im Parentwidget 'beschlossen'
    int frameWidth = rect().width();
    int frameHeight = rect().height();
    int blockHeight = frameHeight / _numBlocks;
    //int blockWidth  = qRound( double( frameWidth ) / double( _numBars ) );
    int blockWidth  = frameWidth / _numBars;
 
    int blockPosX = 0;
 
    for( int x=0; x<_numBars; ++x )
    {
        //qDebug() << "mookoo:" << _numBars << ": " << _volume << ": " << _valueList[i] << " : " << blockWidth;
 
        int barHeight = qRound( _valueList[x] * frameHeight );
        int blocks = barHeight / blockHeight;
        int blockPosY = frameHeight - blocks * blockHeight;
 
        //qDebug() << "aha: " <<  i << ": " << _valueList[i] << ":" << blocks << " posY: " << blockPosY;
 
        for( int y = 0; y < blocks; ++y )
        {
            QRect block = QRect( blockPosX, blockPosY, blockWidth - _padding, blockHeight - _padding );
            painter.fillRect( block, getBlockColor( x, y ) );
 
            blockPosY += blockHeight;
        }
 
        blockPosX += blockWidth;
 
    }
 
}