- Qt 5.5
- Qt Widgets
- Sub-Attaq
- submarine_p.h Example File
- Qt 5.5.1 Reference Documentation

# submarine_p.h Example File

animation/sub-attaq/submarine_p.h

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:LGPL21$
    ** Commercial License Usage
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    ** GNU Lesser General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU Lesser
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    ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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    #ifndef SUBMARINE_P_H
    #define SUBMARINE_P_H

    //
    //  W A R N I N G
    //  -------------
    //
    // This file is not part of the Qt API.  It exists purely as an
    // implementation detail.  This header file may change from version to
    // version without notice, or even be removed.
    //
    // We mean it.
    //

    //Own
    #include "animationmanager.h"
    #include "submarine.h"
    #include "qanimationstate.h"

    //Qt
    #include <QtCore/QPropertyAnimation>
    #include <QtWidgets/QGraphicsScene>

    //This state is describing when the boat is moving right
    class MovementState : public QAnimationState
    {
    Q_OBJECT
    public:
        explicit MovementState(SubMarine *submarine, QState *parent = 0) : QAnimationState(parent)
        {
            movementAnimation = new QPropertyAnimation(submarine, "pos");
            connect(movementAnimation,SIGNAL(valueChanged(const QVariant &)),this,SLOT(onAnimationMovementValueChanged(const QVariant &)));
            setAnimation(movementAnimation);
            AnimationManager::self()->registerAnimation(movementAnimation);
            this->submarine = submarine;
        }

    protected slots:
        void onAnimationMovementValueChanged(const QVariant &)
        {
            if (qrand() % 200 + 1 == 3)
                submarine->launchTorpedo(qrand() % 3 + 1);
        }

    protected:
        void onEntry(QEvent *e) Q_DECL_OVERRIDE
        {
            if (submarine->currentDirection() == SubMarine::Left) {
                movementAnimation->setEndValue(QPointF(0,submarine->y()));
                movementAnimation->setDuration(submarine->x()/submarine->currentSpeed()*12);
            }
            else /*if (submarine->currentDirection() == SubMarine::Right)*/ {
                movementAnimation->setEndValue(QPointF(submarine->scene()->width()-submarine->size().width(),submarine->y()));
                movementAnimation->setDuration((submarine->scene()->width()-submarine->size().width()-submarine->x())/submarine->currentSpeed()*12);
            }
            QAnimationState::onEntry(e);
        }

    private:
        SubMarine *submarine;
        QPropertyAnimation *movementAnimation;
    };

    //This state is describing when the boat is moving right
    class ReturnState : public QAnimationState
    {
    public:
        explicit ReturnState(SubMarine *submarine, QState *parent = 0) : QAnimationState(parent)
        {
            returnAnimation = new QPropertyAnimation(submarine->rotation(), "angle");
            returnAnimation->setDuration(500);
            AnimationManager::self()->registerAnimation(returnAnimation);
            setAnimation(returnAnimation);
            this->submarine = submarine;
        }

    protected:
        void onEntry(QEvent *e) Q_DECL_OVERRIDE
        {
            returnAnimation->stop();
            returnAnimation->setEndValue(submarine->currentDirection() == SubMarine::Right ? 360. : 180.);
            QAnimationState::onEntry(e);
        }

        void onExit(QEvent *e) Q_DECL_OVERRIDE
        {
            submarine->currentDirection() == SubMarine::Right ? submarine->setCurrentDirection(SubMarine::Left) : submarine->setCurrentDirection(SubMarine::Right);
            QAnimationState::onExit(e);
        }

    private:
        SubMarine *submarine;
        QPropertyAnimation *returnAnimation;
    };

    #endif // SUBMARINE_P_H