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
  ** 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 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