Qt 5.11 | Qt Widgets | Sub-Attaq | submarine_p.h Example File

Qt 5.11.3 Reference Documentation

# submarine_p.h Example File

animation/sub-attaq/submarine_p.h

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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 <QtCore/QRandomGenerator>
      #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 (QRandomGenerator::global()->bounded(200) + 1 == 3)
                  submarine->launchTorpedo(QRandomGenerator::global()->bounded(3) + 1);
          }

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

          void onExit(QEvent *e) 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