QKeyEvent Class

Detailed Description

Key events are sent to the widget with keyboard input focus when keys are pressed or released.

A key event contains a special accept flag that indicates whether the receiver will handle the key event. This flag is set by default for QEvent::KeyPress and QEvent::KeyRelease, so there is no need to call accept() when acting on a key event. For QEvent::ShortcutOverride the receiver needs to explicitly accept the event to trigger the override. Calling ignore() on a key event will propagate it to the parent widget. The event is propagated up the parent widget chain until a widget accepts it or an event filter consumes it.

The QWidget::setEnabled() function can be used to enable or disable mouse and keyboard events for a widget.

The event handlers QWidget::keyPressEvent(), QWidget::keyReleaseEvent(), QGraphicsItem::keyPressEvent() and QGraphicsItem::keyReleaseEvent() receive key events.