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ia.LayerBase Class

Extends ia.EventDispatcher
Defined in: ia\charts\layers\LayerBase.js:1
Module: ia

The base class for map layers.

Constructor

ia.LayerBase

()

Defined in ia\charts\layers\LayerBase.js:1

Methods

_mapEventHandler

(
  • event
)
private

Defined in ia\charts\layers\LayerBase.js:324

Handles when to carry out hit tests.

Parameters:

addCanvases

()

Defined in ia\charts\layers\LayerBase.js:233

Adds drawing canvases for the layer when the layer is shown. This method was introduced to fix a bug a chrome when multiple canvases were affecting rendering. It basically reduces the number of unused canvases which are taking up memory.

addEventListener

(
  • eventType
  • fnc
  • obj
)

Inherited from ia.EventDispatcher: ia\events\EventDispatcher.js:15

Add an event listener.

Parameters:

  • eventType String

    The type of event to listen for.

  • fnc Function

    The function to call when the event occurs.

  • obj Object

    An optional parent object.

clear

()

Defined in ia\charts\layers\LayerBase.js:359

Clears all canvases in the layer.

createCanvas

() HTML Canvas

Defined in ia\charts\layers\LayerBase.js:336

Creates a new canvas.

Returns:

HTML Canvas: The canvas.

dispatchEvent

(
  • event
)

Inherited from ia.EventDispatcher: ia\events\EventDispatcher.js:50

Dispatch an event to the listeners.

Parameters:

  • event Object

    The event object.

getVisible

() Boolean

Defined in ia\charts\layers\LayerBase.js:132

Gets the visibility of the layer.

Returns:

Boolean: true/false.

loadSource

()

Defined in ia\charts\layers\LayerBase.js:119

Loads the source data.

removeCanvases

()

Defined in ia\charts\layers\LayerBase.js:292

Removes drawing canvases for the layer when the layer is hidden. This method was introduced to fix a bug a chrome when multiple canvases were affecting rendering. It basically reduces the number of unused canvases which are taking up memory.

removeListener

(
  • obj
)

Inherited from ia.EventDispatcher: ia\events\EventDispatcher.js:30

Removes all event listeners for the given object.

Parameters:

  • obj Object

    The object.

render

()

Defined in ia\charts\layers\LayerBase.js:352

Renders the layer.

setMap

(
  • map
  • map
)

Defined in ia\charts\layers\LayerBase.js:175

Sets the map and canvas for the layer.

Parameters:

  • map ia.Map

    The map.

  • map HTML Element

    The container.

setVisible

(
  • value
)

Defined in ia\charts\layers\LayerBase.js:143

Sets the visibility of the layer.

Parameters:

  • value Boolean

    true/false.

Properties

bBox

ia.BoundingBox

Defined in ia\charts\layers\LayerBase.js:66

The bounding box for the layer.

canvas

HTML Canvas

Defined in ia\charts\layers\LayerBase.js:50

The canvas associated with this layer.

context

HTML Canvas Context

Defined in ia\charts\layers\LayerBase.js:58

The canvas context associated with this layer.

id

String

Defined in ia\charts\layers\LayerBase.js:24

The id of the layer.

Default: ""

interactive

Boolean

Defined in ia\charts\layers\LayerBase.js:92

Is selection and highlighting switched on.

Default: false

isLoaded

Boolean

Defined in ia\charts\layers\LayerBase.js:83

Indicates whether the layer is loaded.

Default: false

map

ia.Map

Defined in ia\charts\layers\LayerBase.js:42

The map associated with this layer.

name

String

Defined in ia\charts\layers\LayerBase.js:33

The name of the layer.

Default: ""

showDataTips

Boolean

Defined in ia\charts\layers\LayerBase.js:110

Are data tips displayed.

Default: trueE

showInLayerList

Boolean

Defined in ia\charts\layers\LayerBase.js:74

Should the layer be displayed ina layer list.

Default: false

showLabels

Boolean

Defined in ia\charts\layers\LayerBase.js:101

Show labels.

Default: false