Class: markerFeature

Extends

• geo.feature

Type Definitions

geo.markerFeature.specgeo.feature.spec

Object specification for a marker feature.

Properties:

Name	Type	Argument	Default	Description
position	geo.geoPosition | function	<optional>		Position of the data. Default is (data).
style	geo.markerFeature.styleSpec	<optional>		Style object with default style options.
layer	geo.layer	<optional>		the parent layer associated with the feature.
selectionAPI	boolean | 'auto'	<optional>	'auto'	If 'auto', enable selection events if any geo.event.feature events are bound to the feature. Otherwise, if truthy, enable selection events on the feature. Selection events are those in geo.event.feature. They can be bound via a call like feature.geoOn(geo.event.feature.mousemove, function (evt) { // do something with the feature }); where the handler is passed a geo.event.feature object.
visible	boolean	<optional>	true	If truthy, show the feature. If falsy, hide the feature and do not allow interaction with it.
gcs	string	<optional>		The interface gcs for this feature. If undefined or null, this uses the layer's interface gcs. This is a string used by geo.transform.
bin	number	<optional>	null	The bin number is used to determine the order of multiple features on the same layer. It has no effect except on the webgl renderer. A negative value hides the feature without stopping interaction with it. Otherwise, more features with higher bin numbers are drawn above those with lower bin numbers. If two features have the same bin number, their order relative to one another is indeterminate and may be unstable. A value of null will use the current position of the feature within its parent's list of children as the bin number.
renderer	geo.renderer	<optional>		A reference to the renderer used for the feature. If null or unset or identical to layer.renderer(), the layer's renderer is used.

geo.markerFeature.styleSpecgeo.feature.styleSpec

Style specification for a marker feature.

Properties:

Name	Type	Argument	Default	Description
radius	number | function	<optional>	5	Radius of each marker in pixels. This includes the stroke width if strokeOffset is -1, excludes it if strokeOffset is 1, and includes half the stroke width if strokeOffset is 0.
strokeColor	geo.geoColor | function	<optional>		Color to stroke each marker.
strokeOpacity	number | function	<optional>	1	Opacity for each marker's stroke. Opacity is on a [0-1] scale. Set this or strokeWidth to zero to not have a stroke.
strokeWidth	number | function	<optional>	1.25	The weight of the marker's stroke in pixels. Set this or strokeOpacity to zero to not have a stroke.
strokeOffset	number | function	<optional>	-1	The position of the stroke compared to the radius. This can only be -1, 0, or 1 (the sign of the value is used).
fillColor	geo.geoColor | function	<optional>		Color to fill each marker.
fillOpacity	number | function	<optional>	1	Opacity for each marker. Opacity is on a [0-1] scale. Set to zero to have no fill.
symbol	number | function	<optional>	0	One of the predefined symbol numbers. This is one of geo.markerFeature.symbols.
symbolValue	number | Array.<number> | function	<optional>	0	A value the affects the appearance of the symbol. Some symbols can take an array of numbers.
rotation	number | function	<optional>	0	The rotation of the symbol in clockwise radians.
scaleWithZoom	geo.markerFeature.scaleMode | function	<optional>	'none'	This determines if the fill, stroke, or both scale with zoom. If set, the values for radius and strokeWidth are the values at zoom-level zero.
rotateWithMap	boolean | function	<optional>	false	If truthy, rotate symbols with the map. If falsy, symbol orientation is absolute.
origin	Array.<number> | function	<optional>		Origin in map gcs coordinates used for to ensure high precision drawing in this location. When called as a function, this is passed the maker positions as a single continuous array in map gcs coordinates. It defaults to the first marker's position.

Static Members

staticgeo.markerFeature.scaleMode

Marker scale modes

Properties:

Name	Type	Default	Description
none		0
fill		1
stroke		2
all		3

staticgeo.markerFeature.symbols

Marker symbols

Properties:

Name	Type	Default	Description
circle		0
ellipse		0
flowerBase		1
flowerMax		16
triangle		16
diamond		17
starBase		17
starMax		16
square		32
rectangle		32
crossBase		33
crossMax		16
oval		48
jackBase		49
jackMax		16
drop		64
dropBase		65
dropMax		16
arrow		80
arrowBase		81
arrowMax		16
length		96

Members

inherited idle

Getter for the idle state. Read only.

Properties:

Name	Type	Description
idle	boolean	true if the object is idle (onIdle would call a handler immediately).

inherited ready

Properties:

Name	Type	Description
ready	boolean	true if this feature has been initialized, false if it was destroyed, undefined if it was created but not initialized.

Static Methods

staticgeo.markerFeature.create(layer, spec){geo.markerFeature|null}

markerFeature.js, line 428

Create a markerFeature from an object.

Name	Type	Description
layer	geo.layer	The layer to add the feature to
spec	geo.markerFeature.spec	The object specification

See:

• geo.feature.create

Returns:

Type	Description
geo.markerFeature | null

Methods

inherited addChild(child){this}

sceneObject.js, line 79

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

Name	Type	Description
child	geo.object | Array.<geo.object>	A child object or array of child objects.

Returns:

Type	Description
this

inherited addPromise(promise){this}

sceneObject.js, line 35

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

Name	Type	Description
promise	Promise	A promise object.

Returns:

Type	Description
this

inherited bin(val, actualValue){number|this}

feature.js, line 740

Get/Set bin of the feature. The bin number is used to determine the order of multiple features on the same layer. It has no effect except on the webgl renderer. A negative value hides the feature without stopping interaction with it. Otherwise, features with higher bin numbers are drawn above those with lower bin numbers. If two features have the same bin number, their order relative to one another is indeterminate and may be unstable.

Name	Type	Description
val	number	optional The new bin number. If undefined, return the current bin number. If null, the bin is dynamically computed based on order within the parent. If children are nested, this may not be what is desired.
actualValue	boolean	optional If truthy and val is undefined, return the actual value of bin, rather than the dynamically computed value.

Returns:

Type	Description
number | this	The current bin number or a reference to this.

inherited boxSearch(lowerLeft, upperRight, opts, gcs){geo.feature.searchResult}

feature.js, line 212

Search for features contained within a rectangular region.

Name	Type	Description
lowerLeft	geo.geoPosition	Lower-left corner.
upperRight	geo.geoPosition	Upper-right corner.
opts	object	optional Additional search options. Name Type Default Description partial boolean false optional If truthy, include features that are partially in the box, otherwise only include features that are fully within the region.
gcs	string | geo.transform | null	optional Input gcs. undefined to use the interface gcs, null to use the map gcs, or any other transform.

Returns:

Type	Description
geo.feature.searchResult	An object with a list of features and feature indices that are located at the specified point.

inherited buildTime(val){geo.timestamp|this}

feature.js, line 783

Get/Set timestamp of last time a build happened.

Name	Type	Description
val	geo.timestamp	optional The new build timestamp object or undefined to get the current build timestamp object.

Returns:

Type	Description
geo.timestamp | this

inherited children(){Array.<geo.object>}

sceneObject.js, line 110

Get an array of the child objects.

Returns:

Type	Description
Array.<geo.object>	A copy of the array of child objects.

inherited data(data){array|this}

feature.js, line 820

Get/Set the data array for the feature. This is equivalent to getting or setting the data style, except that setting the data array via this method updates the data timestamp, whereas setting it via the style does not.

Name	Type	Description
data	array	optional A new data array or undefined to return the existing array.

Returns:

Type	Description
array | this

inherited dataTime(val){geo.timestamp|this}

feature.js, line 766

Get/Set timestamp of data change.

Name	Type	Description
val	geo.timestamp	optional The new data timestamp object or undefined to get the current data timestamp object.

Returns:

Type	Description
geo.timestamp | this

inherited dependentFeatures(arg){Array.<geo.feature>|this}

feature.js, line 715

Get/Set a list of dependent features. Dependent features have their visibility changed at the same time as the feature.

Name	Type	Description
arg	Array.<geo.feature>	optional If specified, the new list of dependent features. Otherwise, return the current list of dependent features.

Returns:

Type	Description
Array.<geo.feature> | this	The current list of dependent features or a reference to this.

inherited draw(arg){this}

sceneObject.js, line 121

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

Name	Type	Description
arg	object	Options to pass to the child draw functions.

Returns:

Type	Description
this

inherited featureGcsToDisplay(c){geo.screenPosition}

feature.js, line 657

Convert from the feature's gcs coordinates to display coordinates.

Name	Type	Description
c	geo.geoPosition	The input coordinate to convert.

Returns:

Type	Description
geo.screenPosition	Display space coordinates.

inherited gcs(val){string|this}

feature.js, line 638

Get/Set the projection of the feature.

Name	Type	Description
val	string	optional nullable If undefined, return the current gcs. If null, use the map's interface gcs. Otherwise, set a new value for the gcs.

Returns:

Type	Description
string | this	A string used by geo.transform. If the map interface gcs is in use, that value will be returned. If the gcs is set, return the current class instance.

inherited geoIsOn(event, handler){boolean}

object.js, line 189

Report if an event handler is bound to this object.

Name	Type	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:

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

inherited geoOff(event, arg){this}

feature.js, line 948

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

Name	Type	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	Description
this

inherited geoOn(event, handler){this}

feature.js, line 926

Bind an event handler to this object.

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	Description
this

inherited geoOnce(event, handler){function}

object.js, line 168

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

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

inherited geoTrigger(event, args, childrenOnly){this}

sceneObject.js, line 136

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

Name	Type	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	Description
this

inherited layer(){geo.layer}

feature.js, line 615

Get the layer referenced by the feature.

Returns:

Type	Description
geo.layer	The layer associated with the feature.

inherited modified(){this}

timestamp.js, line 25

Update the timestamp to the next global timestamp value.

Returns:

Type	Description
this

inherited mouseOverOrderHighestIndex(evt)

feature.js, line 873

If the selectionAPI is on, then setting this.geoOn(geo.event.feature.mouseover_order, this.mouseOverOrderHighestIndex) will make it so that the mouseon events prefer the highest index feature.

Name	Type	Description
evt	geo.event	The event; this should be triggered from geo.event.feature.mouseover_order.

inherited onIdle(handler){this}

object.js, line 36

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.

Name	Type	Description
handler	function	A function taking no arguments.

Returns:

Type	Description
this

inherited parent(arg){this|geo.sceneObject}

sceneObject.js, line 64

Get/set parent of the object.

Name	Type	Description
arg	geo.sceneObject	optional The new parant or undefined to get the current parent.

Returns:

Type	Description
this | geo.sceneObject

pointSearch(p, gcs){object}

markerFeature.js, line 171

Returns an array of datum indices that contain the given marker.

Name	Type	Description
p	geo.geoPosition	marker to search for.
gcs	string | geo.transform | null	optional Input gcs. undefined to use the interface gcs, null to use the map gcs, or any other transform.

Returns:

Type	Description
object	An object with index: a list of marker indices, and found: a list of markers that contain the specified coordinate.

polygonSearch(poly, opts, gcs){object}

markerFeature.js, line 281

Returns an array of datum indices that are contained in the given polygon. This does not take clustering into account.

Name	Type	Description
poly	geo.polygonObject	A polygon as an array of coordinates or an object with outer and optionally inner parameters.
opts	object	optional Additional search options. Name Type Default Description partial boolean false optional If truthy, include markers that are partially in the polygon, otherwise only include markers that are fully within the region. If 'center', only markers whose centers are inside the polygon are returned.
gcs	string | geo.transform | null	optional Input gcs. undefined to use the interface gcs, null to use the map gcs, or any other transform.

Returns:

Type	Description
object	An object with index: a list of marker indices, found: a list of markers within the polygon, and extra: an object with index keys containing an object with a partial key and a boolean value to indicate if the marker is on the polygon's border and a distance key to indicate how far within the polygon the marker is located.

inherited removeChild(child){this}

sceneObject.js, line 96

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

Name	Type	Description
child	geo.object | Array.<geo.object>	A child object or array of child objects.

Returns:

Type	Description
this

inherited removePromise(promise){this}

sceneObject.js, line 49

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

Name	Type	Description
promise	Promise	A promise object.

Returns:

Type	Description
this

inherited renderer(){geo.renderer}

feature.js, line 624

Get the renderer used by the feature.

Returns:

Type	Description
geo.renderer	The renderer used to render the feature.

inherited selectionAPI(arg, direct){boolean|string|this}

feature.js, line 844

Get/Set if the selection API is enabled for this feature.

Name	Type	Description
arg	boolean | string	optional undefined to return the selectionAPI state, a boolean to change the state, or 'auto' to set the state based on the existence of event handlers. When getting the state, if direct is not specified, 'auto' is never returned.
direct	boolean	optional If true, when getting the selectionAPI state, disregard the state of the parent layer, and when setting, refresh the state regardless of whether it has changed or not.

Returns:

Type	Description
boolean | string | this	Either the selectionAPI state or the feature instance.

inherited style(arg1, arg2){object|this}

feature.js, line 491

Get/Set style used by the feature. Styles can be constant values or functions. If a function, the style is typically called with parameters such as (dataElement, dataIndex) or, if the specific style of a feature has a subfeature style, with (subfeatureElement, subfeatureIndex, dataElement, dataIndex).

See the style specification styleSpec for available styles.

Name	Type	Description
arg1	string | object	optional If undefined, return the current style object. If a string and arg2 is undefined, return the style associated with the specified key. If a string and arg2 is defined, set the named style to the specified value. Otherwise, extend the current style with the values in the specified object.
arg2	*	optional If arg1 is a string, the new value for that style.

Returns:

Type	Description
object | this	Either the entire style object, the value of a specific style, or the current class instance.

inherited style.get(key){function|object}

feature.js, line 507

A uniform getter that always returns a function even for constant styles. This can also return all defined styles as functions in a single object.

If the style key is a color, the returned function will also coerce the result to be a geo.geoColorObject.

Name	Type	Description
key	string	optional If defined, return a function for the named style. Otherwise, return an object with a function for all defined styles.

Returns:

Type	Description
function | object	Either a function for the named style or an object with functions for all defined styles.

inherited timestamp(){number}

timestamp.js, line 37

Get time.

Returns:

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

inherited updateStyleFromArray(keyOrObject, styleArray, refresh){this}

feature.js, line 570

Set style(s) from array(s). For each style, the array should have one value per data item. The values are not converted or validated. Color values should be geo.geoColorObjects. If invalid values are given the behavior is undefined. For some feature styles, if the first entry of an array is itself an array, then each entry of the array is expected to be an array, and values are used from these subarrays. This allows a style to apply, for instance, per vertex of a data item rather than per data item.

Name	Type	Default	Description
keyOrObject	string | object		Either the name of a single style or an object where the keys are the names of styles and the values are each arrays.
styleArray	array		If keyOrObject is a string, an array of values for the style. If keyOrObject is an object, this parameter is ignored.
refresh	boolean	false	optional true to redraw the feature when it has been updated. If an object with styles is passed, the redraw is only done once.

Returns:

Type	Description
this	The feature instance.

inherited updateTime(val){geo.timestamp|this}

feature.js, line 800

Get/Set timestamp of last time an update happened.

Name	Type	Description
val	geo.timestamp	optional The new update timestamp object or undefined to get the current update timestamp object.

Returns:

Type	Description
geo.timestamp | this

inherited visible(val, direct){boolean|this}

feature.js, line 680

Get/Set the visibility of the feature.

Name	Type	Description
val	boolean	optional A boolean to change the visibility, or undefined to return the visibility.
direct	boolean	optional If true, when getting the visibility, disregard the visibility of the parent layer, and when setting, refresh the state regardless of whether it has changed or not. Otherwise, the functional visibility is returned, where both the feature and the layer must be visible for a true result.

Returns:

Type	Description
boolean | this	Either the visibility (if getting) or the feature (if setting).