boat_p.h Example File

animation/sub-attaq/boat_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
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef BOAT_P_H
#define BOAT_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 "bomb.h"
#include "graphicsscene.h"

// Qt
#include <QtWidgets/QKeyEventTransition>

static const int MAX_BOMB = 5;

//These transtion test if we have to stop the boat (i.e current speed is 1)
class KeyStopTransition : public QKeyEventTransition
{
public:
    KeyStopTransition(Boat *b, QEvent::Type t, int k)
    : QKeyEventTransition(b, t, k), boat(b)
    {
    }
protected:
    virtual bool eventTest(QEvent *event) Q_DECL_OVERRIDE
    {
        if (!QKeyEventTransition::eventTest(event))
            return false;
        return (boat->currentSpeed() == 1);
    }
private:
    Boat * boat;
};

//These transtion test if we have to move the boat (i.e current speed was 0 or another value)
 class KeyMoveTransition : public QKeyEventTransition
{
public:
    KeyMoveTransition(Boat *b, QEvent::Type t, int k)
    : QKeyEventTransition(b, t, k), boat(b), key(k)
    {
    }
protected:
    virtual bool eventTest(QEvent *event) Q_DECL_OVERRIDE
    {
        if (!QKeyEventTransition::eventTest(event))
            return false;
        return (boat->currentSpeed() >= 0);
    }
    void onTransition(QEvent *) Q_DECL_OVERRIDE
    {
        //We decrease the speed if needed
        if (key == Qt::Key_Left && boat->currentDirection() == Boat::Right)
            boat->setCurrentSpeed(boat->currentSpeed() - 1);
        else if (key == Qt::Key_Right && boat->currentDirection() == Boat::Left)
            boat->setCurrentSpeed(boat->currentSpeed() - 1);
        else if (boat->currentSpeed() < 3)
            boat->setCurrentSpeed(boat->currentSpeed() + 1);
        boat->updateBoatMovement();
    }
private:
    Boat * boat;
    int key;
};

//This transition trigger the bombs launch
 class KeyLaunchTransition : public QKeyEventTransition
{
public:
    KeyLaunchTransition(Boat *boat, QEvent::Type type, int key)
    : QKeyEventTransition(boat, type, key), boat(boat)
    {
    }
protected:
    virtual bool eventTest(QEvent *event) Q_DECL_OVERRIDE
    {
        if (!QKeyEventTransition::eventTest(event))
            return false;
        //We have enough bomb?
        return (boat->bombsLaunched() < MAX_BOMB);
    }
private:
    Boat * boat;
};

//This state is describing when the boat is moving right
class MoveStateRight : public QState
{
public:
    explicit MoveStateRight(Boat *boat,QState *parent = 0) : QState(parent), boat(boat)
    {
    }
protected:
    void onEntry(QEvent *) Q_DECL_OVERRIDE
    {
        boat->setCurrentDirection(Boat::Right);
        boat->updateBoatMovement();
    }
private:
    Boat * boat;
};

 //This state is describing when the boat is moving left
class MoveStateLeft : public QState
{
public:
    explicit MoveStateLeft(Boat *boat,QState *parent = 0) : QState(parent), boat(boat)
    {
    }
protected:
    void onEntry(QEvent *) Q_DECL_OVERRIDE
    {
        boat->setCurrentDirection(Boat::Left);
        boat->updateBoatMovement();
    }
private:
    Boat * boat;
};

//This state is describing when the boat is in a stand by position
class StopState : public QState
{
public:
    explicit StopState(Boat *boat,QState *parent = 0) : QState(parent), boat(boat)
    {
    }
protected:
    void onEntry(QEvent *) Q_DECL_OVERRIDE
    {
        boat->setCurrentSpeed(0);
        boat->setCurrentDirection(Boat::None);
        boat->updateBoatMovement();
    }
private:
    Boat * boat;
};

//This state is describing the launch of the torpedo on the right
class LaunchStateRight : public QState
{
public:
    explicit LaunchStateRight(Boat *boat,QState *parent = 0) : QState(parent), boat(boat)
    {
    }
protected:
    void onEntry(QEvent *) Q_DECL_OVERRIDE
    {
        Bomb *b = new Bomb();
        b->setPos(boat->x()+boat->size().width(),boat->y());
        GraphicsScene *scene = static_cast<GraphicsScene *>(boat->scene());
        scene->addItem(b);
        b->launch(Bomb::Right);
        boat->setBombsLaunched(boat->bombsLaunched() + 1);
    }
private:
    Boat * boat;
};

//This state is describing the launch of the torpedo on the left
class LaunchStateLeft : public QState
{
public:
    explicit LaunchStateLeft(Boat *boat,QState *parent = 0) : QState(parent), boat(boat)
    {
    }
protected:
    void onEntry(QEvent *) Q_DECL_OVERRIDE
    {
        Bomb *b = new Bomb();
        b->setPos(boat->x() - b->size().width(), boat->y());
        GraphicsScene *scene = static_cast<GraphicsScene *>(boat->scene());
        scene->addItem(b);
        b->launch(Bomb::Left);
        boat->setBombsLaunched(boat->bombsLaunched() + 1);
    }
private:
    Boat * boat;
};

#endif // BOAT_P_H

© 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.