submarine.cpp Example File

animation/sub-attaq/submarine.cpp
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//Own
#include "submarine.h"
#include "submarine_p.h"
#include "torpedo.h"
#include "pixmapitem.h"
#include "graphicsscene.h"
#include "animationmanager.h"
#include "qanimationstate.h"

#include <QtCore/QPropertyAnimation>
#include <QtCore/QStateMachine>
#include <QtCore/QFinalState>
#include <QtCore/QSequentialAnimationGroup>

static QAbstractAnimation *setupDestroyAnimation(SubMarine *sub)
{
    QSequentialAnimationGroup *group = new QSequentialAnimationGroup(sub);
    for (int i = 1; i <= 4; ++i) {
        PixmapItem *step = new PixmapItem(QString::fromLatin1("explosion/submarine/step%1").arg(i), GraphicsScene::Big, sub);
        step->setZValue(6);
        step->setOpacity(0);
        QPropertyAnimation *anim = new QPropertyAnimation(step, "opacity", group);
        anim->setDuration(100);
        anim->setEndValue(1);
    }
    AnimationManager::self()->registerAnimation(group);
    return group;
}

SubMarine::SubMarine(int type, const QString &name, int points) : PixmapItem(QString("submarine"), GraphicsScene::Big),
    subType(type), subName(name), subPoints(points), speed(0), direction(SubMarine::None)
{
    setZValue(5);
    setTransformOriginPoint(boundingRect().center());

    graphicsRotation = new QGraphicsRotation(this);
    graphicsRotation->setAxis(Qt::YAxis);
    graphicsRotation->setOrigin(QVector3D(size().width()/2, size().height()/2, 0));
    QList<QGraphicsTransform *> r;
    r.append(graphicsRotation);
    setTransformations(r);

    //We setup the state machine of the submarine
    QStateMachine *machine = new QStateMachine(this);

    //This state is when the boat is moving/rotating
    QState *moving = new QState(machine);

    //This state is when the boat is moving from left to right
    MovementState *movement = new MovementState(this, moving);

    //This state is when the boat is moving from left to right
    ReturnState *rotation = new ReturnState(this, moving);

    //This is the initial state of the moving root state
    moving->setInitialState(movement);

    movement->addTransition(this, SIGNAL(subMarineStateChanged()), moving);

    //This is the initial state of the machine
    machine->setInitialState(moving);

    //End
    QFinalState *final = new QFinalState(machine);

    //If the moving animation is finished we move to the return state
    movement->addTransition(movement, SIGNAL(animationFinished()), rotation);

    //If the return animation is finished we move to the moving state
    rotation->addTransition(rotation, SIGNAL(animationFinished()), movement);

    //This state play the destroyed animation
    QAnimationState *destroyedState = new QAnimationState(machine);
    destroyedState->setAnimation(setupDestroyAnimation(this));

    //Play a nice animation when the submarine is destroyed
    moving->addTransition(this, SIGNAL(subMarineDestroyed()), destroyedState);

    //Transition to final state when the destroyed animation is finished
    destroyedState->addTransition(destroyedState, SIGNAL(animationFinished()), final);

    //The machine has finished to be executed, then the submarine is dead
    connect(machine,SIGNAL(finished()),this, SIGNAL(subMarineExecutionFinished()));

    machine->start();
}

int SubMarine::points() const
{
    return subPoints;
}

void SubMarine::setCurrentDirection(SubMarine::Movement direction)
{
    if (this->direction == direction)
        return;
    if (direction == SubMarine::Right && this->direction == SubMarine::None) {
          graphicsRotation->setAngle(180);
    }
    this->direction = direction;
}

enum SubMarine::Movement SubMarine::currentDirection() const
{
    return direction;
}

void SubMarine::setCurrentSpeed(int speed)
{
    if (speed < 0 || speed > 3) {
        qWarning("SubMarine::setCurrentSpeed : The speed is invalid");
    }
    this->speed = speed;
    emit subMarineStateChanged();
}

int SubMarine::currentSpeed() const
{
    return speed;
}

void SubMarine::launchTorpedo(int speed)
{
    Torpedo * torp = new Torpedo();
    GraphicsScene *scene = static_cast<GraphicsScene *>(this->scene());
    scene->addItem(torp);
    torp->setPos(pos());
    torp->setCurrentSpeed(speed);
    torp->launch();
}

void SubMarine::destroy()
{
    emit subMarineDestroyed();
}

int SubMarine::type() const
{
    return Type;
}

© 2016 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.