TimingSeparator.cc

#include "TimingSeparator.hh"

#include <QPainter>
#include <QGraphicsScene>

#include "TimingUtils.hh"

using namespace Vivy;

TimingSeparator::TimingSeparator(int time, SeparatorStyle style_, QGraphicsItem* parent)
    : QGraphicsObject(parent)
    , style(style_)
{
    setPos(TimingUtils::posFromMs(time), 0);

    switch(style){
    case SeparatorStyle::Start:
        pen = QPen(QColor(0, 0, 255));
        break;
    case SeparatorStyle::Middle:
        pen = QPen(QColor(180, 0, 180));
        break;
    case SeparatorStyle::End:
        pen = QPen(QColor(255, 0, 0));
        break;
    }
    // Putting even-size width seems to be undefined behaviour for pixel drawing : stick to odd
    pen.setWidth(1);
}

QRectF
TimingSeparator::boundingRect() const
{
    return QRectF(-widthPaw, 0, 2*widthPaw, TimingUtils::audioHeight());
}

void
TimingSeparator::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
    painter->setPen(pen);
    int height = TimingUtils::audioHeight();

    int top = 1 + pen.width()/2;
    int bottom = height - 1 - pen.width()/2;

    painter->drawLine(0, top, 0, bottom);

    switch(style){
    case SeparatorStyle::Start:
        painter->drawLine(0, top, widthPaw, top);
        painter->drawLine(0, bottom, widthPaw, bottom);
        break;
    case SeparatorStyle::Middle:
        painter->drawLine(-widthPaw, top, widthPaw, top);
        painter->drawLine(-widthPaw, bottom, widthPaw, bottom);
        break;
    case SeparatorStyle::End:
        painter->drawLine(-widthPaw, top, 0, top);
        painter->drawLine(-widthPaw, bottom, 0, bottom);
        break;
    }
}