/***************************************************************************

    source::worx raDIYo
    Copyright © 2020-2022 c.holzheuer
    chris@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>


/**
 * @brief SWSpectrumWidget::SWSpectrumWidget
 * @param parent
 */

SWSpectrumWidget::SWSpectrumWidget( QWidget* parent )
    : SWBarWidget( parent )
{

    setNumBars( 16 );
    setNumBlocks( 16 );
    _valueList.resize( _numBars );
}





/**
 * @brief SWSpectrumWidget::~SWSpectrumWidget
 */

SWSpectrumWidget::~SWSpectrumWidget()
{
    // stop threads
}


/**
 * @brief Löscht die Werteliste und ruft 'update' auf.
 */

void SWSpectrumWidget::clearValueList()
{
    _valueList.clear();
    _valueList.resize( _numBars );
    update();
}


/**
 * @brief Slot; Wird aufgerufen, wenn sich die Werteliste geändert hat.
 * Ruft update auf.
 * @param freshdata
 */

void SWSpectrumWidget::onValueListChanged( const SWValVec& freshdata )
{
    _valueList = freshdata;
    _valueList.resize( _numBars );
    update();

}


/**
 * @brief Zeichnet das Widget neu.
 * @param event
 */

void SWSpectrumWidget::paintEvent( QPaintEvent* )
{

    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 )
    {

        int barHeight = qRound( _valueList[x] * frameHeight );
        int blocks = barHeight / blockHeight;
        int blockPosY = frameHeight - blocks * blockHeight;

        for( int y = 0; y < blocks; ++y )
        {
            QRect block = QRect( blockPosX, blockPosY, blockWidth - _padding, blockHeight - _padding );
            painter.fillRect( block, getBlockColor( x, y ) );
            //painter.fillRect( block,  _colors[y] );
            //painter.drawText(  block, QString::number(y) );
            blockPosY += blockHeight;
        }

        blockPosX += blockWidth;

    }

}