swvolumewidget.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 <QMouseEvent>
#include <QtGlobal>
 
#include <raDIYo.h>
#include <swvolumewidget.h>
 
 
 
SWVolumeWidget::SWVolumeWidget( QWidget* parent )
    : SWAbstractBarWidget( parent )
{
 
 
    setNumBarsBlocks( 32, 32 );
 
    _valueList.resize( _numBars );
    double dNb = double( _numBars );
    double dSt = ( 1.0 / dNb ) / dNb;
    for( int i=0; i < _numBars; ++i )
        _valueList[i] = double( i ) / dNb + i * dSt + 0.03;
 
    _value = 0.2;
 
}
 
 
SWVolumeWidget::~SWVolumeWidget()
{
 
}
 
 
void SWVolumeWidget::mousePressEvent( QMouseEvent* event )
{
    if( event->button() == Qt::LeftButton )
    {
        _lastPosX = event->pos().x();
        _moving = true;
        // move to ...
    }
}
 
 
void SWVolumeWidget::mouseMoveEvent( QMouseEvent* event )
{
    if( ( event->buttons() & Qt::LeftButton ) && _moving )
    {
 
        double newvalue = 1.0 / (double) _rangeTo * event->pos().x();
 
        _value = qBound( 0.0, newvalue, 1.0 );
        int intvalue = 100 * _value;
        //int intvalue = _rangeTo * _value;
        //qDebug() << "volume: " << _value << " int "<< intvalue << " range: " << _rangeTo;
        //onDialValueChanged( _value );
        update();
        emit valueChanged( intvalue );
    }
 
}
 
void SWVolumeWidget::mouseReleaseEvent( QMouseEvent* event )
{
 
    if( event->button() == Qt::LeftButton && _moving )
        _moving = false;
 
}
 
 
void SWVolumeWidget::paintEvent( QPaintEvent* event )
{
 
    Q_UNUSED( event )
    //Q_ASSERT( _colors.size() >= _numBlocks );
    setRange( 0, width() );
 
    QPainter painter( this );
    //painter.setBackgroundMode( Qt::TransparentMode );
    //painter.fillRect(rect(), QColor( 44,44,44 ) );
 
    QPen pen( Qt::gray );
    pen.setWidth( _frameOffset );
    //pen.setBrush( QColor( 44,44,44 ) );
    painter.setPen( pen );
    QRect frame = rect();
    frame.adjust( 0, 0, -_frameOffset, -_frameOffset );
    painter.fillRect( frame, QColor( 44,44,44 ) );
    painter.drawRoundedRect( frame, 10, 10 );
 
    // Draw the bars
 
    // der Rand wird im Parentwidget 'beschlossen'
    int frameWidth = rect().width();
    int frameHeight = rect().height();
    //int frameWidth = frame.width();
    //int frameHeight = frame.height();
 
    int blockHeight = frameHeight / _numBlocks;
    int blockWidth  = frameWidth / _numBars;
 
    int blockPosX = 0;
    int numColors = _colors.size();
    double factorBars = (double) numColors /  (double) _numBars;
 
 
    for( int i=0; i<_numBars; ++i )
    {
 
        if( _value < _valueList[i] )
            return;
 
        int barHeight = qRound( _valueList[i] * frameHeight ) - 4 * _frameOffset;
        int blocks = barHeight / blockHeight;
        int blockPosY = frameHeight - blocks * blockHeight  - 2 * _frameOffset;
        double factorBlocks= (double) _colors.size() /  (double) blocks;
 
        for( int j = 0; j < blocks; ++j )
        {
            QRect block = QRect( blockPosX, blockPosY, blockWidth - _padding, blockHeight - _padding );
            int colorIndex = _gradientMode ? numColors - 1 - factorBlocks * (double) j : qRound( factorBars * (double) i ) ;
            painter.fillRect( block, _colors[ colorIndex ] );
 
            blockPosY += blockHeight;
        }
 
        blockPosX += blockWidth;
 
    }
 
 
 
}