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** This file is part of Qt 3D Studio.
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#include "SelectionRect.h"
#include "TimelineConstants.h"
#include "Ruler.h"

#include <QtGui/qpainter.h>

SelectionRect::SelectionRect()
{
    setZValue(100);
    setActive(false);
}

void SelectionRect::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                          QWidget *widget)
{
    Q_UNUSED(option)
    Q_UNUSED(widget)

    if (m_active)
        painter->drawRect(m_rect);
}

void SelectionRect::start(const QPointF &origin)
{
    m_rect.setTopLeft(origin);
    m_rect.setWidth(0);
    m_rect.setHeight(0);
    m_active = true;
}

void SelectionRect::updateSize(const QPointF &pos, const QRectF &visibleScene)
{
    QPointF newPos = pos;
    if (newPos.x() < visibleScene.left())
        newPos.setX(visibleScene.left());
    else if (newPos.x() > visibleScene.right())
        newPos.setX(visibleScene.right());
    if (newPos.y() < visibleScene.top())
        newPos.setY(visibleScene.top());
    else if (newPos.y() > visibleScene.bottom())
        newPos.setY(visibleScene.bottom());

    m_rect.setBottomRight(newPos);
    setRect(m_rect.normalized());
}

void SelectionRect::end()
{
    setRect(QRectF());
    m_active = false;
}

bool SelectionRect::isActive() const
{
    return m_active;
}