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    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(const QVariant &)),this,SLOT(onAnimationLaunchValueChanged(const 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 }