qt5base-lts/examples/statemachine/rogue/movementtransition.h

/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
**     the names of its contributors may be used to endorse or promote
**     products derived from this software without specific prior written
**     permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef MOVEMENTTRANSITION_H
#define MOVEMENTTRANSITION_H

#include <QtGui>

#include "window.h"

//![0]
class MovementTransition : public QEventTransition
{
    Q_OBJECT

public:
    MovementTransition(Window *window) :
        QEventTransition(window, QEvent::KeyPress) {
        this->window = window;
    }
//![0]

//![1]
protected:
    bool eventTest(QEvent *event) {
        if (event->type() == QEvent::StateMachineWrapped &&
            static_cast<QStateMachine::WrappedEvent *>(event)->event()->type() == QEvent::KeyPress) {
            QEvent *wrappedEvent = static_cast<QStateMachine::WrappedEvent *>(event)->event();

            QKeyEvent *keyEvent = static_cast<QKeyEvent *>(wrappedEvent);
            int key = keyEvent->key();

            return key == Qt::Key_2 || key == Qt::Key_8 || key == Qt::Key_6 ||
                   key == Qt::Key_4;
        }
        return false;
    }
//![1]

//![2]
    void onTransition(QEvent *event) {
        QKeyEvent *keyEvent = static_cast<QKeyEvent *>(
            static_cast<QStateMachine::WrappedEvent *>(event)->event());

        int key = keyEvent->key();
        switch (key) {
            case Qt::Key_4:
                window->movePlayer(Window::Left);
                break;
            case Qt::Key_8:
                window->movePlayer(Window::Up);
                break;
            case Qt::Key_6:
                window->movePlayer(Window::Right);
                break;
            case Qt::Key_2:
                window->movePlayer(Window::Down);
                break;
            default:
                ;
        }
    }
//![2]

private:
    Window *window;
};

#endif