Qt 5.11 | Qt WebEngine | WebEngine Widgets Video Player Example | fullscreennotification.cpp Example File

Qt 5.11.3 Reference Documentation

# fullscreennotification.cpp Example File

webenginewidgets/videoplayer/fullscreennotification.cpp

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      #include "fullscreennotification.h"

      #include <QGraphicsOpacityEffect>
      #include <QPropertyAnimation>
      #include <QSequentialAnimationGroup>

      FullScreenNotification::FullScreenNotification(QWidget *parent)
          : QLabel(parent)
          , m_previouslyVisible(false)
      {
          setText(tr("You are now in full screen mode. Press ESC to quit!"));
          setStyleSheet(
              "font-size: 24px;"
              "color: white;"
              "background-color: black;"
              "border-color: white;"
              "border-width: 2px;"
              "border-style: solid;"
              "padding: 100px");
          setAttribute(Qt::WA_TransparentForMouseEvents);

          auto effect = new QGraphicsOpacityEffect;
          effect->setOpacity(1);
          setGraphicsEffect(effect);

          auto animations = new QSequentialAnimationGroup(this);
          animations->addPause(3000);
          auto opacityAnimation = new QPropertyAnimation(effect, "opacity", animations);
          opacityAnimation->setDuration(2000);
          opacityAnimation->setStartValue(1.0);
          opacityAnimation->setEndValue(0.0);
          opacityAnimation->setEasingCurve(QEasingCurve::OutQuad);
          animations->addAnimation(opacityAnimation);

          connect(this, &FullScreenNotification::shown,
                  [animations](){ animations->start(); });

          connect(animations, &QAbstractAnimation::finished,
                  [this](){ this->hide(); });
      }

      void FullScreenNotification::showEvent(QShowEvent *event)
      {
          QLabel::showEvent(event);
          if (!m_previouslyVisible && isVisible())
              emit shown();
          m_previouslyVisible = isVisible();
      }