Receives callbacks when keys are pressed. More...

Inheritance diagram for KeyListener:

Public Member Functions
virtual	~KeyListener ()=default
	Destructor. More...

virtual bool	keyPressed (const KeyPress &key, Component *originatingComponent)=0
	Called to indicate that a key has been pressed. More...

virtual bool	keyStateChanged (bool isKeyDown, Component *originatingComponent)
	Called when any key is pressed or released. More...

Detailed Description

Receives callbacks when keys are pressed.

You can add a key listener to a component to be informed when that component gets key events. See the Component::addListener method for more details.

See also: KeyPress, Component::addKeyListener, KeyPressMappingSet

Constructor & Destructor Documentation

◆ ~KeyListener()

virtual KeyListener::~KeyListener ( )

virtualdefault

Destructor.

Member Function Documentation

◆ keyPressed()

virtual bool KeyListener::keyPressed	(	const KeyPress &	key,
		Component *	originatingComponent
	)

pure virtual

Called to indicate that a key has been pressed.

If your implementation returns true, then the key event is considered to have been consumed, and will not be passed on to any other components. If it returns false, then the key will be passed to other components that might want to use it.

Parameters

key	the keystroke, including modifier keys
originatingComponent	the component that received the key event

See also: keyStateChanged, Component::keyPressed

Implemented in KeyPressMappingSet.

Referenced by KeyPressMappingSet::getCommandManager().

◆ keyStateChanged()

virtual bool KeyListener::keyStateChanged	(	bool	isKeyDown,
		Component *	originatingComponent
	)

virtual

Called when any key is pressed or released.

When this is called, classes that might be interested in the state of one or more keys can use KeyPress::isKeyCurrentlyDown() to check whether their key has changed.