LineChart.Events

type alias Config data msg =

Config data msg

Use in the LineChart.Config passed to LineChart.viewCustom.

chartConfig : LineChart.Config Data msg
chartConfig =
  { ...
  , events = Events.default
  , ...
  }

default : Config data msg

Adds no events.

hoverOne : (Maybe data -> msg) -> Config data msg

Sends a message when the mouse is within a 30 pixel radius of a dot. Sends a Nothing when the mouse is not hovering a dot.

Pass a message taking the data of the data point hovered.

eventsConfig : Events.Config Data Msg
eventsConfig =
    Events.hoverOne Hover

See the full example here.

hoverMany : (List data -> msg) -> Config data msg

Sends a message when the mouse is within a 30 pixel distance of a x-coordinate with one or several dots on. Sends a [] when the mouse is not hovering an dots.

Pass a message taking the data of the data points hovered.

eventsConfig : Events.Config Data Msg
eventsConfig =
    Events.hoverMany OnHoverMany

See the full example here.

click : (Maybe data -> msg) -> Config data msg

Sends a given message when clicking on a dot.

Pass a message taking the data of the data points clicked.

eventsConfig : Events.Config Data Msg
eventsConfig =
    Events.click Click

See the full example here.

Customization

custom : List (Event data msg) -> Config data msg

Add your own combination of events. The cool thing here is that you can pick another Events.Decoder or use Events.on for events without shortcuts.

eventsConfig : Events.Config Data Msg
eventsConfig =
    Events.custom
        [ Events.onMouseMove Hover Events.getNearest
        , Events.onMouseLeave (Hover Nothing)
        ]

See the full example here.

This example sends the Hover message with the data of the nearest dot when hovering the chart area and Hover Nothing when your leave the chart area.

Events

type alias Event data msg =

Event data msg

onClick : (a -> msg) -> Decoder data a -> Event data msg

onMouseMove : (a -> msg) -> Decoder data a -> Event data msg

onMouseUp : (a -> msg) -> Decoder data a -> Event data msg

onMouseDown : (a -> msg) -> Decoder data a -> Event data msg

onMouseLeave : msg -> Event data msg

on : String -> (a -> msg) -> Decoder data a -> Event data msg

Add any event to your chart.

Arguments:

The JavaScript event name.
The message.
The Events.Decoder to determine what data you want from the event.

onWithOptions : String -> Options -> (a -> msg) -> Decoder data a -> Event data msg

Same as on, but you can add some options too!

1. The JavaScript event name.
2. The `Options`.
2. The message.
3. The `Events.Decoder` to determine what data you want from the event.

type alias Options =

{ stopPropagation : Bool

, preventDefault : Bool

, catchOutsideChart : Bool

}

Decoders

type alias Decoder data msg =

Decoder data msg

Gets you information about where your event happened on your chart. This example gets you the data of the nearest dot to where you are hovering.

events : Config Data Msg
events =
    Events.custom
        [ Events.onMouseMove Hover Events.getNearest ]

getSvg : Decoder data Point

Get the SVG-space coordinates of the event.

getData : Decoder data Point

Get the data-space coordinates of the event.

getNearest : Decoder data (Maybe data)

Get the data coordinates nearest to the event. Returns Nothing if you have no data showing.

getNearestX : Decoder data (List data)

Get the data coordinates horizontally nearest to the event.

getWithin : Float -> Decoder data (Maybe data)

Get the data coordinates nearest of the event within the radius you provide in the first argument. Returns Nothing if you have no data showing.

getWithinX : Float -> Decoder data (List data)

Finds the data coordinates horizontally nearest to the event, within the distance you provide in the first argument.

Maps

type Msg
    = Hover ( Maybe Data, Coordinate.Point )


events : Events.Config Data Msg
events =
    Events.custom
        [ Events.onMouseMove Hover decoder ]


decoder : Events.Decoder
decoder =
    Events.map2 (,) Events.getNearest Events.getSvg

map : (a -> msg) -> Decoder data a -> Decoder data msg

map2 : (a -> b -> msg) -> Decoder data a -> Decoder data b -> Decoder data msg

map3 :

(a -> b -> c -> msg)

-> Decoder data a

-> Decoder data b

-> Decoder data c

-> Decoder data msg

peterszerzo/line-charts/1.0.1

LineChart.Events

Customization

Events

Decoders

Maps

Modules