Qt 5.7 | Qt WebEngine | WebEngine Demo Browser Example | fullscreennotification.cpp Example File

Qt 5.7.1 Reference Documentation

# fullscreennotification.cpp Example File

webenginewidgets/demobrowser/fullscreennotification.cpp

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      #include "fullscreennotification.h"

      #include <QApplication>
      #include <QDesktopWidget>
      #include <QGridLayout>
      #include <QLabel>
      #include <QPropertyAnimation>
      #include <QTimer>

      FullScreenNotification::FullScreenNotification(QWidget *parent)
          : QWidget(parent)
          , width(400)
          , height(80)
          , x((parent->geometry().width() - width) / 2)
          , y(80)
      {
          setVisible(false);
          setWindowFlags(Qt::ToolTip | Qt::WindowDoesNotAcceptFocus);

          QGridLayout *layout = new QGridLayout(this);

          m_label = new QLabel(tr("You are now in fullscreen mode. Press ESC to quit!"), this);
          layout->addWidget(m_label, 0, 0, 0, 0, Qt::AlignHCenter | Qt::AlignVCenter);

          setGeometry(x, y, width, height);

          setStyleSheet("background-color: white;\
              color: black;");

          m_animation = new QPropertyAnimation(this, "windowOpacity");
          connect(m_animation, SIGNAL(finished()), this, SLOT(fadeOutFinished()));
      }

      FullScreenNotification::~FullScreenNotification()
      {
      }

      void FullScreenNotification::show()
      {
          setWindowOpacity(1.0);
          QTimer::singleShot(300, [&] {
              QWidget *parent = parentWidget();
              x = (parent->geometry().width() - width) / 2;
              QPoint topLeft = parent->mapToGlobal(QPoint(x, y));
              QWidget::move(topLeft.x(), topLeft.y());
              QWidget::show();
              QWidget::raise();
          });
          QTimer::singleShot(5000, this, SLOT(fadeOut()));
      }

      void FullScreenNotification::hide()
      {
          QWidget::hide();
          m_animation->stop();
      }

      void FullScreenNotification::fadeOut()
      {
          m_animation->setDuration(800);
          m_animation->setStartValue(1.0);
          m_animation->setEndValue(0.0);
          m_animation->setEasingCurve(QEasingCurve::OutQuad);
          m_animation->start();
      }

      void FullScreenNotification::fadeOutFinished()
      {
          hide();
          setWindowOpacity(1.0);
      }