/******************************************************************************** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).** All rights reserved.** Contact: Nokia Corporation (qt-info@nokia.com)**** This file is part of the QtCore module 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.****************** $QT_END_LICENSE$******************************************************************************///Own#include "torpedo.h"#include "pixmapitem.h"#include "boat.h"#include "graphicsscene.h"#include "animationmanager.h"#include "qanimationstate.h"#include <QtCore/QPropertyAnimation>#include <QtCore/QStateMachine>#include <QtCore/QFinalState>Torpedo::Torpedo() : PixmapItem(QString::fromLatin1("torpedo"),GraphicsScene::Big), currentSpeed(0){ setZValue(2);}void Torpedo::launch(){ QPropertyAnimation *launchAnimation = new QPropertyAnimation(this, "pos"); AnimationManager::self()->registerAnimation(launchAnimation); launchAnimation->setEndValue(QPointF(x(),qobject_cast<GraphicsScene *>(scene())->sealLevel() - 15)); launchAnimation->setEasingCurve(QEasingCurve::InQuad); launchAnimation->setDuration(y()/currentSpeed*10); connect(launchAnimation,SIGNAL(valueChanged(QVariant)),this,SLOT(onAnimationLaunchValueChanged(QVariant))); connect(this,SIGNAL(torpedoExploded()), launchAnimation, SLOT(stop())); //We setup the state machine of the torpedo QStateMachine *machine = new QStateMachine(this); //This state is when the launch animation is playing QAnimationState *launched = new QAnimationState(machine); launched->setAnimation(launchAnimation); //End QFinalState *final = new QFinalState(machine); machine->setInitialState(launched); //### Add a nice animation when the torpedo is destroyed launched->addTransition(this, SIGNAL(torpedoExploded()),final); //If the animation is finished, then we move to the final state launched->addTransition(launched, SIGNAL(animationFinished()), final); //The machine has finished to be executed, then the boat is dead connect(machine,SIGNAL(finished()),this, SIGNAL(torpedoExecutionFinished())); machine->start();}void Torpedo::setCurrentSpeed(int speed){ if (speed < 0) { qWarning("Torpedo::setCurrentSpeed : The speed is invalid"); return; } currentSpeed = speed;}void Torpedo::onAnimationLaunchValueChanged(const QVariant &){ foreach (QGraphicsItem *item , collidingItems(Qt::IntersectsItemBoundingRect)) { if (Boat *b = qgraphicsitem_cast<Boat*>(item)) b->destroy(); }}void Torpedo::destroy(){ emit torpedoExploded();}