1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

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

     6 **

     7 ** This file is part of the QtCore module of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

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

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

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

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

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

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

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

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

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

    23 **

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

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

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

    27 **

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

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

    30 **

    31 **

    32 **

    33 **

    34 **

    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 //Own

    43 #include "torpedo.h"

    44 #include "pixmapitem.h"

    45 #include "boat.h"

    46 #include "graphicsscene.h"

    47 #include "animationmanager.h"

    48 #include "qanimationstate.h"

    49 

    50 #include <QtCore/QPropertyAnimation>

    51 #include <QtCore/QStateMachine>

    52 #include <QtCore/QFinalState>

    53 

    54 Torpedo::Torpedo() : PixmapItem(QString::fromLatin1("torpedo"),GraphicsScene::Big),

    55     currentSpeed(0)

    56 {

    57     setZValue(2);

    58 }

    59 

    60 void Torpedo::launch()

    61 {

    62     QPropertyAnimation *launchAnimation = new QPropertyAnimation(this, "pos");

    63     AnimationManager::self()->registerAnimation(launchAnimation);

    64     launchAnimation->setEndValue(QPointF(x(),qobject_cast<GraphicsScene *>(scene())->sealLevel() - 15));

    65     launchAnimation->setEasingCurve(QEasingCurve::InQuad);

    66     launchAnimation->setDuration(y()/currentSpeed*10);

    67     connect(launchAnimation,SIGNAL(valueChanged(QVariant)),this,SLOT(onAnimationLaunchValueChanged(QVariant)));

    68     connect(this,SIGNAL(torpedoExploded()), launchAnimation, SLOT(stop()));

    69 

    70     //We setup the state machine of the torpedo

    71     QStateMachine *machine = new QStateMachine(this);

    72 

    73     //This state is when the launch animation is playing

    74     QAnimationState *launched = new QAnimationState(machine);

    75     launched->setAnimation(launchAnimation);

    76 

    77     //End

    78     QFinalState *final = new QFinalState(machine);

    79 

    80     machine->setInitialState(launched);

    81 

    82     //### Add a nice animation when the torpedo is destroyed

    83     launched->addTransition(this, SIGNAL(torpedoExploded()),final);

    84 

    85     //If the animation is finished, then we move to the final state

    86     launched->addTransition(launched, SIGNAL(animationFinished()), final);

    87 

    88     //The machine has finished to be executed, then the boat is dead

    89     connect(machine,SIGNAL(finished()),this, SIGNAL(torpedoExecutionFinished()));

    90 

    91     machine->start();

    92 }

    93 

    94 void Torpedo::setCurrentSpeed(int speed)

    95 {

    96     if (speed < 0) {

    97         qWarning("Torpedo::setCurrentSpeed : The speed is invalid");

    98         return;

    99     }

   100     currentSpeed = speed;

   101 }

   102 

   103 void Torpedo::onAnimationLaunchValueChanged(const QVariant &)

   104 {

   105     foreach (QGraphicsItem *item , collidingItems(Qt::IntersectsItemBoundingRect)) {

   106         if (Boat *b = qgraphicsitem_cast<Boat*>(item))

   107             b->destroy();

   108     }

   109 }

   110 

   111 void Torpedo::destroy()

   112 {

   113     emit torpedoExploded();

   114 }