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ia.ImageLayer Class

Extends ia.LayerBase
Defined in: ia\maps\layers\ImageLayer.js:1
Module: ia

The base class for Image layers - ags and wms.

Constructor

ia.ImageLayer

()

Defined in ia\maps\layers\ImageLayer.js:1

Methods

_mapEventHandler

(
  • event
)
private

Inherited from ia.LayerBase: ia\charts\layers\LayerBase.js:324

Handles when to carry out hit tests.

Parameters:

addCanvases

()

Inherited from ia.LayerBase: 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

()

Inherited from ia.LayerBase: ia\charts\layers\LayerBase.js:359

Clears all canvases in the layer.

createCanvas

() HTML Canvas

Inherited from ia.LayerBase: 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.

draw

(
  • ctx
)

Defined in ia\maps\layers\ImageLayer.js:101

Draws the image without reloading it.

Parameters:

  • ctx HTML Canvas Context

    The context to render to.

getUrl

()

Defined in ia\maps\layers\ImageLayer.js:123

Returns the required url.

Returns:

The url for retrieving the layer info.

getVisible

() Boolean

Inherited from ia.LayerBase: ia\charts\layers\LayerBase.js:132

Gets the visibility of the layer.

Returns:

Boolean: true/false.

loadSource

()

Inherited from ia.LayerBase: ia\charts\layers\LayerBase.js:119

Loads the source data.

removeCanvases

()

Inherited from ia.LayerBase: 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

()

Inherited from ia.LayerBase but overwritten in ia\maps\layers\ImageLayer.js:67

Renders the image.

setMap

(
  • map
  • map
)

Inherited from ia.LayerBase: 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
)

Inherited from ia.LayerBase: ia\charts\layers\LayerBase.js:143

Sets the visibility of the layer.

Parameters:

  • value Boolean

    true/false.

Properties

bBox

ia.BoundingBox

Inherited from ia.LayerBase: ia\charts\layers\LayerBase.js:66

The bounding box for the layer.

canvas

HTML Canvas

Inherited from ia.LayerBase: ia\charts\layers\LayerBase.js:50

The canvas associated with this layer.

context

HTML Canvas Context

Inherited from ia.LayerBase: ia\charts\layers\LayerBase.js:58

The canvas context associated with this layer.

id

String

Inherited from ia.LayerBase: ia\charts\layers\LayerBase.js:24

The id of the layer.

Default: ""

interactive

Boolean

Inherited from ia.LayerBase: ia\charts\layers\LayerBase.js:92

Is selection and highlighting switched on.

Default: false

isLoaded

Boolean

Inherited from ia.LayerBase: ia\charts\layers\LayerBase.js:83

Indicates whether the layer is loaded.

Default: false

layers

String

Defined in ia\maps\layers\ImageLayer.js:40

Determines which layers appear on the exported map.

Default: ""

map

ia.Map

Inherited from ia.LayerBase: ia\charts\layers\LayerBase.js:42

The map associated with this layer.

name

String

Inherited from ia.LayerBase: ia\charts\layers\LayerBase.js:33

The name of the layer.

Default: ""

params

String

Defined in ia\maps\layers\ImageLayer.js:31

Any additional params.

Default: ""

showDataTips

Boolean

Inherited from ia.LayerBase: ia\charts\layers\LayerBase.js:110

Are data tips displayed.

Default: trueE

showInLayerList

Boolean

Inherited from ia.LayerBase: ia\charts\layers\LayerBase.js:74

Should the layer be displayed ina layer list.

Default: false

showLabels

Boolean

Inherited from ia.LayerBase: ia\charts\layers\LayerBase.js:101

Show labels.

Default: false

srs

String

Defined in ia\maps\layers\ImageLayer.js:49

The spatial reference system.

Default: ""

url

String

Defined in ia\maps\layers\ImageLayer.js:22

The url.

Default: ""

version

String

Defined in ia\maps\layers\ImageLayer.js:58

The version number.

Default: ""