/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtCore module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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//Own+
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#include "torpedo.h"+
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#include "pixmapitem.h"+
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#include "boat.h"+
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#include "graphicsscene.h"+
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#include "animationmanager.h"+
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#include "qanimationstate.h"+
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+
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#include <QtCore/QPropertyAnimation>+
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#include <QtCore/QStateMachine>+
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#include <QtCore/QFinalState>+
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+
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Torpedo::Torpedo() : PixmapItem(QString::fromLatin1("torpedo"),GraphicsScene::Big),+
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    currentSpeed(0)+
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{+
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    setZValue(2);+
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}+
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+
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void Torpedo::launch()+
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{+
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    QPropertyAnimation *launchAnimation = new QPropertyAnimation(this, "pos");+
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    AnimationManager::self()->registerAnimation(launchAnimation);+
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    launchAnimation->setEndValue(QPointF(x(),qobject_cast<GraphicsScene *>(scene())->sealLevel() - 15));+
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    launchAnimation->setEasingCurve(QEasingCurve::InQuad);+
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    launchAnimation->setDuration(y()/currentSpeed*10);+
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    connect(launchAnimation,SIGNAL(valueChanged(QVariant)),this,SLOT(onAnimationLaunchValueChanged(QVariant)));+
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    connect(this,SIGNAL(torpedoExploded()), launchAnimation, SLOT(stop()));+
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+
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    //We setup the state machine of the torpedo+
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    QStateMachine *machine = new QStateMachine(this);+
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+
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    //This state is when the launch animation is playing+
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    QAnimationState *launched = new QAnimationState(machine);+
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    launched->setAnimation(launchAnimation);+
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+
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    //End+
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    QFinalState *final = new QFinalState(machine);+
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+
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    machine->setInitialState(launched);+
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+
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    //### Add a nice animation when the torpedo is destroyed+
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    launched->addTransition(this, SIGNAL(torpedoExploded()),final);+
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+
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    //If the animation is finished, then we move to the final state+
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    launched->addTransition(launched, SIGNAL(animationFinished()), final);+
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+
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    //The machine has finished to be executed, then the boat is dead+
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    connect(machine,SIGNAL(finished()),this, SIGNAL(torpedoExecutionFinished()));+
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+
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    machine->start();+
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}+
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+
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void Torpedo::setCurrentSpeed(int speed)+
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{+
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    if (speed < 0) {+
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        qWarning("Torpedo::setCurrentSpeed : The speed is invalid");+
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        return;+
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    }+
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    currentSpeed = speed;+
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}+
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+
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void Torpedo::onAnimationLaunchValueChanged(const QVariant &)+
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{+
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    foreach (QGraphicsItem *item , collidingItems(Qt::IntersectsItemBoundingRect)) {+
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        if (Boat *b = qgraphicsitem_cast<Boat*>(item))+
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            b->destroy();+
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    }+
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}+
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+
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void Torpedo::destroy()+
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{+
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    emit torpedoExploded();+
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}+
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