/home/marsyas/marsyas/src/marsyasqt/QtMarPlot.cpp

#include "QtMarPlot.h"

namespace MarsyasQt
{
QtMarPlot::QtMarPlot(QWidget *parent)
        : QWidget(parent)
{
//  data_ = NULL;
    plotName_ = "";
    minVal_ = -1;
    highVal_ = 1;
    pixelWidth_ = 1;
    startOffset_ = 0;
    endOffset_ = -1;
    drawCenter_ = false;
    drawImpulses_ = false;
    setAutoFillBackground(true);
    setBackgroundColor(QColor(255,255,255));
}

QtMarPlot::~QtMarPlot()
{
}

void
QtMarPlot::paintEvent(QPaintEvent *)
{
    if (data_.getSize()==0)
        return;

    QPainter painter(this);
    // plot name
    painter.drawText( 4, 14, plotName_);

    // dotted line
    QPen pen(Qt::SolidPattern, 1, Qt::DashLine);
    painter.setPen(pen);
    if (drawCenter_)
        painter.drawLine( 0, height()/2, width(), height()/2);

    pen.setWidth(pixelWidth_);
    pen.setStyle(Qt::SolidLine);
    pen.setCapStyle(Qt::RoundCap);
    pen.setJoinStyle(Qt::RoundJoin);
    painter.setPen(pen);

    mrs_natural i;
    mrs_natural x,y;
    mrs_real hScale = width() / (mrs_real) (endOffset_ - startOffset_);
    mrs_real vScale = height() / (highVal_ - minVal_); // maximum scaled pitch/median
    mrs_real vMean = (minVal_+highVal_)/2;
    mrs_natural midY = height()/2;

    // iterates over the data_
    for (i=0; i<data_.getSize(); i++)
    {
        x = mrs_natural (i * hScale);
        y = mrs_natural ( (data_(i)-vMean) * vScale );
        if ( (y>-midY) && (y<midY))
            painter.drawPoint( x, -y+midY);
        if (drawImpulses_)
        {
            for (y=y; y>-height()/2; y--)
                painter.drawPoint( x, -y+midY);
        }
    }
}

} //namespace

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