movementtransition.h Example File

 /****************************************************************************
 **
 ** Copyright (C) 2015 The Qt Company Ltd.
 ** Contact: http://www.qt.io/licensing/
 **
 ** 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 The Qt Company Ltd 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"

 class MovementTransition : public QEventTransition
 {
     Q_OBJECT

 public:
     MovementTransition(Window *window) :
         QEventTransition(window, QEvent::KeyPress) {
         this->window = window;
     }

 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 || key == Qt::Key_Down || key == Qt::Key_Up ||
                    key == Qt::Key_Right || key == Qt::Key_Left;
         }
         return false;
     }

     void onTransition(QEvent *event) {
         QKeyEvent *keyEvent = static_cast<QKeyEvent *>(
             static_cast<QStateMachine::WrappedEvent *>(event)->event());

         int key = keyEvent->key();
         switch (key) {
             case Qt::Key_Left:
             case Qt::Key_4:
                 window->movePlayer(Window::Left);
                 break;
             case Qt::Key_Up:
             case Qt::Key_8:
                 window->movePlayer(Window::Up);
                 break;
             case Qt::Key_Right:
             case Qt::Key_6:
                 window->movePlayer(Window::Right);
                 break;
             case Qt::Key_Down:
             case Qt::Key_2:
                 window->movePlayer(Window::Down);
                 break;
             default:
                 ;
         }
     }

 private:
     Window *window;
 };

 #endif