C++ QAbstractAnimationJob::setCurrentTime方法代码示例

void QQmlAnimationTimer::updateAnimationsTime(qint64 delta)
{
    //setCurrentTime can get this called again while we're the for loop. At least with pauseAnimations
    if (insideTick)
        return;

    lastTick += delta;

    //we make sure we only call update time if the time has actually changed
    //it might happen in some cases that the time doesn't change because events are delayed
    //when the CPU load is high
    if (delta) {
        insideTick = true;
        for (currentAnimationIdx = 0; currentAnimationIdx < animations.count(); ++currentAnimationIdx) {
            QAbstractAnimationJob *animation = animations.at(currentAnimationIdx);
            int elapsed = animation->m_totalCurrentTime
                          + (animation->direction() == QAbstractAnimationJob::Forward ? delta : -delta);
            animation->setCurrentTime(elapsed);
        }
        if (animationTickDump()) {
            qDebug() << "***** Dumping Animation Tree ***** ( tick:" << lastTick << "delta:" << delta << ")";
            for (int i = 0; i < animations.count(); ++i)
                qDebug() << animations.at(i);
        }
        insideTick = false;
        currentAnimationIdx = 0;
    }
}

void QContinuingAnimationGroupJob::updateCurrentTime(int /*currentTime*/)
{
    Q_ASSERT(firstChild());

    for (QAbstractAnimationJob *animation = firstChild(); animation; animation = animation->nextSibling()) {
        if (animation->state() == state()) {
            RETURN_IF_DELETED(animation->setCurrentTime(m_currentTime));
        }
    }
}

void QSequentialAnimationGroupJob::advanceForwards(const AnimationIndex &newAnimationIndex)
{
    if (m_previousLoop < m_currentLoop) {
        // we need to fast forward to the end
        for (QAbstractAnimationJob *anim = m_currentAnimation; anim; anim = anim->nextSibling()) {
            setCurrentAnimation(anim, true);
            RETURN_IF_DELETED(anim->setCurrentTime(animationActualTotalDuration(anim)));
        }
        // this will make sure the current animation is reset to the beginning
        if (firstChild() && !firstChild()->nextSibling())   //count == 1
            // we need to force activation because setCurrentAnimation will have no effect
            activateCurrentAnimation();
        else
            setCurrentAnimation(firstChild(), true);
    }

    // and now we need to fast forward from the current position to
    for (QAbstractAnimationJob *anim = m_currentAnimation; anim && anim != newAnimationIndex.animation; anim = anim->nextSibling()) {     //### WRONG,
        setCurrentAnimation(anim, true);
        RETURN_IF_DELETED(anim->setCurrentTime(animationActualTotalDuration(anim)));
    }
    // setting the new current animation will happen later
}

void QSequentialAnimationGroupJob::rewindForwards(const AnimationIndex &newAnimationIndex)
{
    if (m_previousLoop > m_currentLoop) {
        // we need to fast rewind to the beginning
        for (QAbstractAnimationJob *anim = m_currentAnimation; anim; anim = anim->previousSibling()) {
            RETURN_IF_DELETED(setCurrentAnimation(anim, true));
            RETURN_IF_DELETED(anim->setCurrentTime(0));
        }
        // this will make sure the current animation is reset to the end
        if (lastChild() && !lastChild()->previousSibling()) {   //count == 1
            // we need to force activation because setCurrentAnimation will have no effect
            RETURN_IF_DELETED(activateCurrentAnimation());
        } else {
            RETURN_IF_DELETED(setCurrentAnimation(lastChild(), true));
        }
    }

    // and now we need to fast rewind from the current position to
    for (QAbstractAnimationJob *anim = m_currentAnimation; anim && anim != newAnimationIndex.animation; anim = anim->previousSibling()) {
        RETURN_IF_DELETED(setCurrentAnimation(anim, true));
        RETURN_IF_DELETED(anim->setCurrentTime(0));
    }
    // setting the new current animation will happen later
}