/****************************************************************************

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the demonstration applications of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#include "demoitemanimation.h"

#include "demoitem.h"

#include "colors.h"

DemoItemAnimation::DemoItemAnimation(DemoItem *item, INOROUT inOrOut)

{

    this->opacityAt0 = 1.0;

    this->opacityAt1 = 1.0;

    this->startDelay = 0;

    this->inOrOut = inOrOut;

    this->hideOnFinished = false;

    this->forcePlay = false;

    this->timeline = new QTimeLine(5000);

    this->timeline->setFrameRange(0, 2000);

    this->timeline->setUpdateInterval(int(1000.0/Colors::fps));

    this->moveOnPlay = false;

    setTimeLine(this->timeline);

    setItem(item);

}

DemoItemAnimation::~DemoItemAnimation()

{

    // Do not delete demoitem. It is not

    // owned by an animation

    delete this->timeline;

}

void DemoItemAnimation::prepare()

{

    this->demoItem()->prepare();

}

void DemoItemAnimation::setStartPos(const QPointF &pos){

    this->startPos = pos;

}

void DemoItemAnimation::setDuration(int duration)

{

    duration = int(duration * Colors::animSpeed);

    this->timeline->setDuration(duration);

    this->moveOnPlay = true;

}

void DemoItemAnimation::setCurrentTime(int ms)

{

    this->timeline->setCurrentTime(ms);

}

bool DemoItemAnimation::notOwnerOfItem()

{

    return this != demoItem()->currentAnimation;

}

void DemoItemAnimation::play(bool fromStart, bool force)

{

    this->fromStart = fromStart;

    this->forcePlay = force;

    QPointF currPos = this->demoItem()->pos();

    // If the item that this animation controls in currently under the

    // control of another animation, stop that animation first

    if (this->demoItem()->currentAnimation)

        this->demoItem()->currentAnimation->timeline->stop();

    this->demoItem()->currentAnimation = this;

    this->timeline->stop();

    if (Colors::noAnimations && !this->forcePlay){

        this->timeline->setCurrentTime(1);

        this->demoItem()->setPos(this->posAt(1));

    }

    else{

        if (this->demoItem()->isVisible())

            // If the item is already visible, start the animation from

            // the items current position rather than from start.

            this->setPosAt(0.0, currPos);

        else

            this->setPosAt(0.0, this->startPos);

        if (this->fromStart){

            this->timeline->setCurrentTime(0);

            this->demoItem()->setPos(this->posAt(0));

        }

    }

    if (this->inOrOut == ANIM_IN)

        this->demoItem()->setRecursiveVisible(true);

    if (this->startDelay){

        QTimer::singleShot(this->startDelay, this, SLOT(playWithoutDelay()));

        return;

    }

    else

        this->playWithoutDelay();

}

void DemoItemAnimation::playWithoutDelay()

{

    if (this->moveOnPlay && !(Colors::noAnimations && !this->forcePlay))

        this->timeline->start();

    this->demoItem()->animationStarted(this->inOrOut);

}

void DemoItemAnimation::stop(bool reset)

{

    this->timeline->stop();

    if (reset)

        this->demoItem()->setPos(this->posAt(0));

    if (this->hideOnFinished && !this->moveOnPlay)

        this->demoItem()->setRecursiveVisible(false);

    this->demoItem()->animationStopped(this->inOrOut);

}

void DemoItemAnimation::setRepeat(int nr)

{

    this->timeline->setLoopCount(nr);

}

void DemoItemAnimation::playReverse()

{

}

bool DemoItemAnimation::running()

{

    return (this->timeLine()->state() == QTimeLine::Running);

}

bool DemoItemAnimation::runningOrItemLocked()

{

    return (this->running() || this->demoItem()->locked);

}

void DemoItemAnimation::lockItem(bool state)

{

    this->demoItem()->locked = state;

}

DemoItem *DemoItemAnimation::demoItem()

{

    return (DemoItem *) this->item();

}

void DemoItemAnimation::setOpacityAt0(qreal opacity)

{

    this->opacityAt0 = opacity;

}

void DemoItemAnimation::setOpacityAt1(qreal opacity)

{

    this->opacityAt1 = opacity;

}

void DemoItemAnimation::setOpacity(qreal step)

{

    DemoItem *demoItem = (DemoItem *) item();

    demoItem->opacity = this->opacityAt0 + step * step * step * (this->opacityAt1 - this->opacityAt0);

}

void DemoItemAnimation::afterAnimationStep(qreal step)

{

    if (step == 1.0f){

        if (this->timeline->loopCount() > 0){

            // animation finished.

            if (this->hideOnFinished)

                this->demoItem()->setRecursiveVisible(false);

            this->demoItem()->animationStopped(this->inOrOut);

        }

    } else if (Colors::noAnimations && !this->forcePlay){

        // The animation is not at end, but

        // the animations should not play, so go to end.

        this->setStep(1.0f); // will make this method being called recursive.

    }

}