fullscreennotification.cpp Example File

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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);
  }