layer

geo. layer

new layer(argopt) → {geo.layer}

Description:

  • Create a new layer.

Source:
Parameters:
Name Type Attributes Description
arg geo.layer.spec <optional>

Specification for the new layer.
Returns:
Type
geo.layer

Extends

Members

idle

Description:

  • Getter for the idle state. Read only.

Source:
Inherited From:
Properties:
Name Type Description
idle boolean

true if the object is idle (onIdle would call a handler immediately).

Getter for the idle state. Read only.

(protected) newLayerId

Description:

  • Gets a new id number for a layer.

Source:

Gets a new id number for a layer.

Methods

active(argopt) → {boolean|this}

Description:

  • Get/Set whether or not the layer is active. An active layer will receive native mouse when the layer is on top. Non-active layers will never receive native mouse events.

Source:
Parameters:
Name Type Attributes Description
arg boolean <optional>

If specified, the new active value.
Returns:
Type
boolean | this

addChild(child) → {this}

Description:

  • Add a child (or an array of children) to the object.

Source:
Inherited From:
Parameters:
Name Type Description
child geo.object | Array.<geo.object>

A child object or array of child objects.
Returns:
Type
this

addPromise(promise) → {this}

Description:

  • Add the promise here and also propagate up the scene tree.

Source:
Inherited From:
Parameters:
Name Type Description
promise Promise

A promise object.
Returns:
Type
this

attribution(argnullable) → {string|this}

Description:

  • Get or set the attribution html content that will displayed with the layer. By default, nothing will be displayed. Note, this content is not html escaped, so care should be taken when rendering user provided content.

Source:
Parameters:
Name Type Attributes Description
arg string <nullable>

An html fragment
Returns:

Chainable as a setter

Type
string | this

autoshareRenderer() → {boolean|string}

Description:

  • Get the setting of autoshareRenderer.

Source:
Returns:
Type
boolean | string

canvas() → {HTMLCanvasElement}

Description:

  • Get canvas of the layer.

Source:
Returns:

The canvas element associated with the layer.

Type
HTMLCanvasElement

children() → {Array.<geo.object>}

Description:

  • Get an array of the child objects.

Source:
Inherited From:
Returns:

A copy of the array of child objects.

Type
Array.<geo.object>

dataTime() → {geo.timestamp}

Description:

  • Return last time data got changed.

Source:
Returns:

The data time.

Type
geo.timestamp

draw(arg) → {this}

Description:

  • Force redraw of a scene object, to be implemented by subclasses. Base class just calls draw of child objects.

Source:
Inherited From:
Parameters:
Name Type Description
arg object

Options to pass to the child draw functions.
Returns:
Type
this

fromLocal(input) → {geo.geoPosition}

Description:

  • Transform coordinates from a local coordinate system to world coordinates.

Source:
Parameters:
Name Type Description
input geo.geoPosition

Renderer coordinates.
Returns:

World coordinates.

Type
geo.geoPosition

geoIsOn(event, handleropt) → {boolean}

Description:

  • Report if an event handler is bound to this object.

Source:
Inherited From:
Parameters:
Name Type Attributes Description
event string | Array.<string>

An event or list of events to check.
handler function <optional>

A function that might be bound. If undefined, this will report true if there is any handler for the specified event.
Returns:

true if any of the specified events are bound to the specified handler.

Type
boolean

geoOff(eventopt, argopt, nullable) → {this}

Description:

  • Remove handlers from one event or an array of events. If no event is provided all handlers will be removed.

Source:
Inherited From:
Parameters:
Name Type Attributes Description
event string | Array.<string> <optional>

An event or a list of events from geo.event or defined by the user, or undefined to remove all events (in which case arg is ignored).
arg function | Array.<function()> <optional>
<nullable>

A function or array of functions to remove from the events or a falsy value to remove all handlers from the events.
Returns:
Type
this

geoOn(event, handler) → {this}

Description:

  • Bind an event handler to this object.

Source:
Inherited From:
Parameters:
Name Type Description
event string

An event from geo.event or a user-defined value.
handler function

A function that is called when event is triggered. The function is passed a geo.event object.
Returns:
Type
this

geoOnce(event, handler) → {function}

Description:

  • Bind an event handler to this object that will fire once and then deregister itself.

Source:
Inherited From:
Parameters:
Name Type Description
event string

An event from geo.event or a user-defined value.
handler function

A function that is called when event is triggered. The function is passed a geo.event object.
Returns:

The actual bound handler. This is a wrapper around the handler that was passed to the function.

Type
function

geoTrigger(event, args, childrenOnlyopt) → {this}

Description:

  • Trigger an event (or events) on this object and call all handlers.

Source:
Inherited From:
Parameters:
Name Type Attributes Description
event string

The event to trigger.
args object

Arbitrary argument to pass to the handler.
childrenOnly boolean <optional>

If truthy, only propagate down the tree.
Returns:
Type
this

height() → {number}

Description:

  • Return the height of the layer in pixels.

Source:
Returns:

The height of the parent map in pixels.

Type
number

id(valopt) → {string|this}

Description:

  • Get/Set id of the layer.

Source:
Parameters:
Name Type Attributes Description
val string | null <optional>

If null, generate a new layer id. Otherwise, if specified, the new id of the layer.
Returns:
Type
string | this

initialized(valopt) → {boolean|this}

Description:

  • Get/Set if the layer has been initialized.

Source:
Parameters:
Name Type Attributes Description
val boolean <optional>

If specified, update the initialized value. Otherwise, return the current instance.
Returns:

Either the initialized value or this.

Type
boolean | this

map() → {geo.map}

Description:

  • Get the map associated with this layer.

Source:
Returns:

The map associated with the layer.

Type
geo.map

modified() → {this}

Description:

  • Update the timestamp to the next global timestamp value.

Source:
Inherited From:
Returns:
Type
this

moveDown(nopt) → {this}

Description:

  • Bring the layer below the given number of layers. This will rotate the current z-indices for this and the previous n layers.

Source:
Parameters:
Name Type Attributes Description
n number <optional>

The number of positions to move.
Returns:
Type
this

moveToBottom() → {this}

Description:

  • Bring the layer to the bottom of the map layers.

Source:
Returns:
Type
this

moveToTop() → {this}

Description:

  • Bring the layer to the top of the map layers.

Source:
Returns:
Type
this

moveUp(nopt) → {this}

Description:

  • Bring the layer above the given number of layers. This will rotate the current z-indices for this and the next n layers.

Source:
Parameters:
Name Type Attributes Description
n number <optional>

The number of positions to move.
Returns:
Type
this

name(valopt) → {string|this}

Description:

  • Get/Set name of the layer.

Source:
Parameters:
Name Type Attributes Description
val string <optional>

If specified, the new name of the layer.
Returns:
Type
string | this

node() → {HTMLDivElement}

Description:

  • Get root node of the layer.

Source:
Returns:
Type
HTMLDivElement

onIdle(handler) → {this}

Description:

  • Bind a handler that will be called one time when all internal promises are resolved. If there are no outstanding promises, this is invoked synchronously.

Source:
Inherited From:
Parameters:
Name Type Description
handler function

A function taking no arguments.
Returns:
Type
this

opacity(opacityopt) → {number|this}

Description:

  • Get or set the current layer opacity. The opacity is in the range [0-1]. An opacity of 0 is not the same as setting visible(false), as interactions can still occur with the layer.

Source:
Parameters:
Name Type Attributes Description
opacity number <optional>

If specified, set the opacity. Otherwise, return the opacity.
Returns:

The current opacity or the current layer.

Type
number | this

parent(argopt) → {this|geo.sceneObject}

Description:

  • Get/set parent of the object.

Source:
Inherited From:
Parameters:
Name Type Attributes Description
arg geo.sceneObject <optional>

The new parent or undefined to get the current parent.
Returns:
Type
this | geo.sceneObject

removeChild(child) → {this}

Description:

  • Remove a child (or array of children) from the object.

Source:
Inherited From:
Parameters:
Name Type Description
child geo.object | Array.<geo.object>

A child object or array of child objects.
Returns:
Type
this

removePromise(promise) → {this}

Description:

  • Remove the promise here and also propagate up the scene tree.

Source:
Inherited From:
Parameters:
Name Type Description
promise Promise

A promise object.
Returns:
Type
this

renderer() → {geo.renderer}

Description:

  • Get the renderer for the layer.

Source:
Returns:

The renderer associated with the layer or null if there is no renderer.

Type
geo.renderer

rendererName() → {string}

Description:

  • Get the name of the renderer.

Source:
Returns:
Type
string

selectionAPI(valopt) → {boolean|this}

Description:

  • Get/Set selectionAPI of the layer.

Source:
Parameters:
Name Type Attributes Description
val boolean <optional>

If specified, set the selectionAPI state, otherwise return it.
Returns:

Either the selectionAPI state or the layer.

Type
boolean | this

sticky() → {boolean}

Description:

  • Get whether or not the layer is sticky (navigates with the map).

Source:
Returns:
Type
boolean

timestamp() → {number}

Description:

  • Get time.

Source:
Inherited From:
Returns:

The timestamp. This is 0 if the timestamp has never been modified.

Type
number

toLocal(input) → {geo.geoPosition}

Description:

  • Transform coordinates from world coordinates into a local coordinate system specific to the underlying renderer. This method is exposed to allow direct access the rendering context, but otherwise should not be called directly. The default implementation is the identity operator.

Source:
Parameters:
Name Type Description
input geo.geoPosition

World coordinates.
Returns:

Renderer coordinates.

Type
geo.geoPosition

updateTime() → {geo.timestamp}

Description:

  • Return the modified time for the last update that did something.

Source:
Returns:

The update time.

Type
geo.timestamp

visible(valopt) → {boolean|this}

Description:

  • Get/Set visibility of the layer.

Source:
Parameters:
Name Type Attributes Description
val boolean <optional>

If specified, change the visibility. Otherwise, get it.
Returns:

either the visibility (if getting) or the layer (if setting).

Type
boolean | this

width() → {number}

Description:

  • Return the width of the layer in pixels.

Source:
Returns:

The width of the parent map in pixels.

Type
number

zIndex(zIndexopt, allowDuplicateopt) → {number|this}

Description:

  • Get or set the z-index of the layer. The z-index controls the display order of the layers in much the same way as the CSS z-index property.

Source:
Parameters:
Name Type Attributes Description
zIndex number <optional>

The new z-index, or undefined to return the current z-index.
allowDuplicate boolean <optional>

When setting the z index, if this is truthy, allow other layers to have the same z-index. Otherwise, ensure that other layers have distinct z-indices from this one.
Returns:
Type
number | this

(static) create(map, spec) → {geo.layer|null}

Description:

  • Create a layer from an object. Any errors in the creation of the layer will result in returning null.

Source:
Parameters:
Name Type Description
map geo.map

The map to add the layer to
spec geo.layer.createSpec

The layer specification.
Returns:
Type
geo.layer | null

Type Definitions

createSpec

Description:

  • General object specification for feature types.

Source:
Properties:
Name Type Attributes Default Description
type string <optional>
 'feature'

For feature compatibility with more than one kind of creatable layer
data Array.<object> <optional>
 []

The default data array to apply to each feature if none exists.
renderer string <optional>
 'webgl'

The renderer to use.
features Array.<geo.feature.spec> <optional>
 []

Features to add to the layer.
id number <optional>

The id of the layer. Defaults to a increasing sequence.
map geo.map <optional>
 null

Parent map of the layer.
autoshareRenderer boolean | string <optional>
 true

If truthy and the renderer supports it, auto-share renderers between layers. Currently, auto-sharing can only occur for webgl renderers and adjacent layers. If true, sharing will only occur if the layers have the same opacity and it is 1 or 0 and any tile layers are below non-tile layers. If "more", sharing will occur for any adjacent layers that have the same opacity. Shared renderers has slightly different behavior than non-shared renderers: changing z-index may result in rerendering and be slightly slower; only one DOM canvas is used for all shared renderers. Some features have slight z-stacking differences in shared versus non-shared renderers.
canvas HTMLElement <optional>

If specified, use this canvas rather than a canvas associaied with the renderer directly. Renderers may not support sharing a canvas.
annotations Array.<string> | object <optional>

A list of annotations that will be used on this layer, used to select a renderer. Instead of a list, if this is an object, the keys are the annotation names, and the values are each a list of modes that will be used with that annotation. See featuresForAnnotations more details. This is ignored if renderer is specified.
active boolean <optional>
 true

Truthy if the layer has the active css class and may receive native mouse events.
attribution string <optional>

An attribution string to display.
opacity number <optional>
 1

The layer opacity on a scale of [0-1].
name string <optional>
 ''

A name for the layer for user convenience. If specified, this is also the id property of the containing DOM element.
selectionAPI boolean <optional>
 true

Truthy if the layer can generate selection and other interaction events.
sticky boolean <optional>
 true

Truthy if the layer should navigate with the map.
visible boolean <optional>
 true

Truthy if the layer is visible.
zIndex number <optional>

The z-index to assign to the layer (defaults to the index of the layer inside the map).

General object specification for feature types.

Type:

spec

Description:

  • Object specification for a layer.

Source:
Properties:
Name Type Attributes Default Description
id number <optional>

The id of the layer. Defaults to a increasing sequence.
map geo.map <optional>
 null

Parent map of the layer.
renderer string | geo.renderer <optional>

Renderer to associate with the layer. If not specified, either annotations or features can be used to determine the renderer. If a geo.renderer instance, the renderer is not recreated; not all renderers can be shared by multiple layers.
autoshareRenderer boolean | string <optional>
 true

If truthy and the renderer supports it, auto-share renderers between layers. Currently, auto-sharing can only occur for webgl renderers and adjacent layers. If true, sharing will only occur if the layers have the same opacity and it is 1 or 0 and any tile layers are below non-tile layers. If "more", sharing will occur for any adjacent layers that have the same opacity. Shared renderers has slightly different behavior than non-shared renderers: changing z-index may result in rerendering and be slightly slower; only one DOM canvas is used for all shared renderers. Some features have slight z-stacking differences in shared versus non-shared renderers.
canvas HTMLElement <optional>

If specified, use this canvas rather than a canvas associaied with the renderer directly. Renderers may not support sharing a canvas.
annotations Array.<string> | object <optional>

A list of annotations that will be used on this layer, used to select a renderer. Instead of a list, if this is an object, the keys are the annotation names, and the values are each a list of modes that will be used with that annotation. See featuresForAnnotations more details. This is ignored if renderer is specified.
features Array.<string> <optional>

A list of features that will be used on this layer, used to select a renderer. Features are the basic feature names (e.g., 'quad'), or the feature name followed by a required capability (e.g., 'quad.image'). This is ignored if renderer or annotations is specified.
active boolean <optional>
 true

Truthy if the layer has the active css class and may receive native mouse events.
attribution string <optional>

An attribution string to display.
opacity number <optional>
 1

The layer opacity on a scale of [0-1].
name string <optional>
 ''

A name for the layer for user convenience. If specified, this is also the id property of the containing DOM element.
selectionAPI boolean <optional>
 true

Truthy if the layer can generate selection and other interaction events.
sticky boolean <optional>
 true

Truthy if the layer should navigate with the map.
visible boolean <optional>
 true

Truthy if the layer is visible.
zIndex number <optional>

The z-index to assign to the layer (defaults to the index of the layer inside the map).

Object specification for a layer.

Type:
  • object