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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//Own
+#include "torpedo.h"
+#include "pixmapitem.h"
+#include "boat.h"
+#include "graphicsscene.h"
+#include "animationmanager.h"
+
+#if defined(QT_EXPERIMENTAL_SOLUTION)
+#include "qpropertyanimation.h"
+#include "qstatemachine.h"
+#include "qfinalstate.h"
+#include "qanimationstate.h"
+#else
+#include <QPropertyAnimation>
+#include <QAnimationState>
+#include <QStateMachine>
+#include <QFinalState>
+#endif
+
+Torpedo::Torpedo(QGraphicsItem * parent, Qt::WindowFlags wFlags)
+ : QGraphicsWidget(parent,wFlags), currentSpeed(0), launchAnimation(0)
+{
+ pixmapItem = new PixmapItem(QString::fromLatin1("torpedo"),GraphicsScene::Big, this);
+ setZValue(2);
+ setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+ setFlags(QGraphicsItem::ItemIsMovable);
+ resize(pixmapItem->boundingRect().size());
+}
+
+void Torpedo::launch()
+{
+ 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(const QVariant &)),this,SLOT(onAnimationLaunchValueChanged(const QVariant &)));
+
+ //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(launchAnimation,machine->rootState());
+
+ machine->setInitialState(launched);
+
+ //End
+ QFinalState *final = new QFinalState(machine->rootState());
+
+ //### Add a nice animation when the torpedo is destroyed
+ launched->addTransition(this, SIGNAL(torpedoExplosed()),final);
+
+ //If the animation is finished, then we move to the final state
+ launched->addFinishedTransition(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 (item->type() == Boat::Type) {
+ Boat *b = static_cast<Boat *>(item);
+ b->destroy();
+ }
+ }
+}
+
+void Torpedo::destroy()
+{
+ launchAnimation->stop();
+ emit torpedoExplosed();
+}