Keyboard events

Two kinds of keyboard events can be generated for a View that has received input focus.

Event	Constant	Description
"key-down-event"	KeyDownEvent	The key has been pressed.
"key-up-event"	KeyUpEvent	The key has been released.

The main event data listener has the following format:

func(View, KeyEvent)

where the second argument describes the parameters of the keys pressed. The KeyEvent structure has the following fields:

Field	Type	Description
TimeStamp	uint64	The time the event was created (in milliseconds). The starting point depends on the browser implementation (EPOCH, browser launch, etc.).
Key	string	The value of the key on which the event occurred. The value is returned taking into account the current language and case.
Code	string	The key code of the represented event. The value is independent of the current language and case.
Repeat	bool	Repeated pressing: the key was pressed until its input began to be automatically repeated.
CtrlKey	bool	The Ctrl key was active when the event occurred.
ShiftKey	bool	The Shift key was active when the event occurred.
AltKey	bool	The Alt (Option or ⌥ in OS X) key was active when the event occurred.
MetaKey	bool	The Meta key (for Mac, this is the ⌘ Command key; for Windows, the Windows key ⊞) was active when the event occurred.

You can also use listeners in the following formats:

func(KeyEvent)
func(View)
func()

You can get lists of listeners for keyboard events using the functions:

func GetKeyDownListeners(view View, subviewID ...string) []func(View, KeyEvent)
func GetKeyUpListeners(view View, subviewID ...string) []func(View, KeyEvent)