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#include "rectanimation.h"

#include "dummyobject.h"

static inline int interpolateInteger(int from, int to, qreal progress)

{

   return from + (to - from) * progress;

}

RectAnimation::RectAnimation(DummyObject *obj) : m_object(obj), m_dura(250)

{

}

void RectAnimation::setEndValue(const QRect &rect)

{

    m_end = rect;

}

void RectAnimation::setStartValue(const QRect &rect)

{

    m_start = rect;

}

void RectAnimation::setDuration(int d)

{

    m_dura = d;

}

int RectAnimation::duration() const

{

    return m_dura;

}

void RectAnimation::updateCurrentTime(int currentTime)

{

    qreal progress = m_easing.valueForProgress( currentTime / qreal(m_dura) );

    QRect now;

    now.setCoords(interpolateInteger(m_start.left(), m_end.left(), progress),

                  interpolateInteger(m_start.top(), m_end.top(), progress),

                  interpolateInteger(m_start.right(), m_end.right(), progress),

                  interpolateInteger(m_start.bottom(), m_end.bottom(), progress));

    bool changed = (now != m_current);

    if (changed)

        m_current = now;

    if (state() == Stopped)

        return;

    if (m_object)

        m_object->setRect(m_current);

}