How to get mouse click events outside the Qt window?

[wysota]

Make it fullscreen or the only application using the X server.

[orion.zhang]

try this.
first actived current widget
then
overload the event function

bool YourWidget::event ( QEvent * event )
{
	if (event->type() == QEvent::ActivationChange)
	{
		if(QApplication::activeWindow() != this)
		{
			this->hide();
		}
	}
	return QWidget::event(event);
}

bool YourWidget::event ( QEvent * event )
{
	if (event->type() == QEvent::ActivationChange)
	{
		if(QApplication::activeWindow() != this)
		{
			this->hide();
		}
	}
	return QWidget::event(event);
}

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[szymon]

maybe:

void QWidget::leaveEvent(QEvent * event)
{
close();
}