This library handles the modern event.key event in Elm. See https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key
Keys that can be passed from an event.
Capture events for things like text fields or text areas.
It grabs the key value at event.key
Capture events for things like text fields or text areas.
It grabs the key value at event.key. Accepts options.
module Key exposing (Key(..), onKey, onKeyWithOptions)
{-| This library handles the modern event.key event in Elm. See [https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key](https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key)
# Definition
@docs Key
# Events
@docs onKey, onKeyWithOptions
-}
import Html exposing (..)
import Html.Events exposing (..)
import Json.Decode as Json
{-| Keys that can be passed from an event.
-}
type Key
= Key String
| Shift
| Meta
| Control
| Alt
| AltGraph
| CapsLock
| Tab
| Enter
| Backspace
| Esc
| Fn
| FnLock
| Hyper
| NumLock
| ScrollLock
| Super
| Symbol
| SymbolLock
| ArrowDown
| ArrowUp
| ArrowLeft
| ArrowRight
| End
| Home
| PageDown
| PageUp
| Clear
| Copy
| CrSel
| Cut
| Delete
| EraseEof
| ExSel
| Insert
| Paste
| Redo
| Undo
| Accept
| Again
| Attn
| Cancel
| ContextMenu
| Escape
| Execute
| Find
| Finish
| Help
| Pause
| Play
| Props
| Select
| ZoomIn
| ZoomOut
| BrightnessDown
| BrightnessUp
| Eject
| LogOff
| Power
| PowerOff
| PrintScreen
| Hibernate
| StandBy
| WakeUp
| Dead
| F1
| F2
| F3
| F4
| F5
| F6
| F7
| F8
| F9
| F10
| F11
| F12
| F13
| F14
| F15
| F16
| F17
| F18
| F19
| F20
-- Public
{-| Capture events for things like text fields or text areas.
It grabs the **key** value at `event.key`
-}
onKey : (Key -> msg) -> Html.Attribute msg
onKey tagger =
on "keydown" (Json.map tagger key)
{-| Capture events for things like text fields or text areas.
It grabs the **key** value at `event.key`. Accepts options.
-}
onKeyWithOptions : Options -> (Key -> msg) -> Html.Attribute msg
onKeyWithOptions options tagger =
onWithOptions "keydown" options (Json.map tagger key)
-- Private
key : Json.Decoder Key
key =
Json.at [ "key" ] keyDecoder
keyDecoder : Json.Decoder Key
keyDecoder =
Json.map
(\k ->
case k of
"Shift" ->
Shift
"Meta" ->
Meta
"Control" ->
Control
"Alt" ->
Alt
"CapsLock" ->
CapsLock
"Tab" ->
Tab
"Enter" ->
Enter
"Backspace" ->
Backspace
"Esc" ->
Esc
"AltGraph" ->
AltGraph
"Fn" ->
Fn
"FnLock" ->
FnLock
"Hyper" ->
Hyper
"NumLock" ->
NumLock
"ScrollLock" ->
ScrollLock
"Super" ->
Super
"Symbol" ->
Symbol
"SymbolLock" ->
SymbolLock
"ArrowDown" ->
ArrowDown
"ArrowUp" ->
ArrowUp
"ArrowLeft" ->
ArrowLeft
"ArrowRight" ->
ArrowRight
"End" ->
End
"Home" ->
Home
"PageDown" ->
PageDown
"PageUp" ->
PageUp
"Clear" ->
Clear
"Copy" ->
Copy
"CrSel" ->
CrSel
"Cut" ->
Cut
"Delete" ->
Delete
"EraseEof" ->
EraseEof
"ExSel" ->
ExSel
"Insert" ->
Insert
"Paste" ->
Paste
"Redo" ->
Redo
"Undo" ->
Undo
"Accept" ->
Accept
"Again" ->
Again
"Attn" ->
Attn
"Cancel" ->
Cancel
"ContextMenu" ->
ContextMenu
"Escape" ->
Escape
"Execute" ->
Execute
"Find" ->
Find
"Finish" ->
Finish
"Help" ->
Help
"Pause" ->
Pause
"Play" ->
Play
"Props" ->
Props
"Select" ->
Select
"ZoomIn" ->
ZoomIn
"ZoomOut" ->
ZoomOut
"BrightnessDown" ->
BrightnessDown
"BrightnessUp" ->
BrightnessUp
"Eject" ->
Eject
"LogOff" ->
LogOff
"Power" ->
Power
"PowerOff" ->
PowerOff
"PrintScreen" ->
PrintScreen
"Hibernate" ->
Hibernate
"StandBy" ->
StandBy
"WakeUp" ->
WakeUp
"Dead" ->
Dead
"F1" ->
F1
"F2" ->
F2
"F3" ->
F3
"F4" ->
F4
"F5" ->
F5
"F6" ->
F6
"F7" ->
F7
"F8" ->
F8
"F9" ->
F9
"F10" ->
F10
"F11" ->
F11
"F12" ->
F12
"F13" ->
F13
"F14" ->
F14
"F15" ->
F15
"F16" ->
F16
"F17" ->
F17
"F18" ->
F18
"F19" ->
F19
"F20" ->
F20
_ ->
Key k
)
Json.string