GeoJS

Class: lineFeature

geo.canvas. lineFeature

new geo.canvas.lineFeature(arg){geo.canvas.lineFeature}

canvas/lineFeature.js, line 14

Create a new instance of class lineFeature.

Name Type Description
arg geo.lineFeature.spec
Returns:
Type Description
geo.canvas.lineFeature

Extends

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.

Methods

inherited addChild(child){this}

sceneObject.js, line 64

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 34

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 734

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){geo.feature.searchResult}

feature.js, line 207

Search for features contained within a rectangular region.

Name Type Description
lowerLeft geo.geoPosition

Lower-left corner in gcs coordinates.
upperRight geo.geoPosition

Upper-right corner in gcs coordinates.
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.
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 777

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 95

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 814

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 760

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 709

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 106

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 651

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 632

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 134

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 942

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 920

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 geoTrigger(event, args, childrenOnly){this}

sceneObject.js, line 121

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 609

Get the layer referenced by the feature.

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

inherited line(val){object|function|this}

lineFeature.js, line 107

Get/set line accessor.

Name Type Description
val object | function optional

If not specified, return the current line accessor. If specified, use this for the line accessor and return this. If a function is given, the function is passed (dataElement, dataIndex) and returns an array of vertex elements.
Returns:
Type Description
object | function | this The current line accessor or this 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 867

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 33

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 49

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

inherited pointSearch(p){object}

lineFeature.js, line 218

Returns an array of datum indices that contain the given point. This is a slow implementation with runtime order of the number of vertices. A point is considered on a line segment if it is close to the line or either end point. Closeness is based on the maximum width of the line segement, and is ceil(maxwidth / 2) + 2 pixels. This means that corner extensions due to mitering may be outside of the selection area and that variable- width lines will have a greater selection region than their visual size at the narrow end.

Name Type Description
p geo.geoPosition

point to search for in map interface gcs.
Returns:
Type Description
object An object with index: a list of line indices, found: a list of quads that contain the specified coordinate, and extra: an object with keys that are line indices and values that are the first segement index for which the line was matched.

inherited polygonSearch(poly, opts){object}

lineFeature.js, line 269

Returns lines that are contained in the given polygon.

Name Type Description
poly geo.polygonObject

A polygon as an array of coordinates or an object with outer and optionally inner parameters. All coordinates are in map interface gcs.
opts object optional

Additional search options.

Name Type Default Description
partial boolean false optional

If truthy, include lines that are partially in the polygon, otherwise only include lines that are fully within the region.
Returns:
Type Description
object An object with index: a list of line indices, found: a list of lines within the polygon, and extra: an object with index keys containing an object with a segment key with a value indicating one of the line segments that is inside the polygon and partial key and a boolean value to indicate if the line is on the polygon's border.

inherited position(val){geo.geoPosition|function|this}

lineFeature.js, line 128

Get/Set position accessor.

Name Type Description
val geo.geoPosition | function optional

If not specified, return the current position accessor. If specified, use this for the position accessor and return this. If a function is given, this is called with (vertexElement, vertexIndex, dataElement, dataIndex).
Returns:
Type Description
geo.geoPosition | function | this The current position or this feature.

inherited rdpSimplifyData(data, tolerance, posFunc, lineFunc){this}

lineFeature.js, line 380

Take a set of data, reduce the number of vertices per line using the Ramer–Douglas–Peucker algorithm, and use the result as the new data. This changes the instance's data, the position accessor, and the line accessor.

Name Type Default Description
data array

A new data array.
tolerance number optional

The maximum variation allowed in map.gcs units. A value of zero will only remove perfectly colinear points. If not specified, this is set to a half display pixel at the map's current zoom level.
posFunc function this.style.get('position') optional

The function to get the position of each vertex.
lineFunc function this.style.get('line') optional

The function to get each line.
Returns:
Type Description
this

inherited removeChild(child){this}

sceneObject.js, line 81

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 renderer(){geo.renderer}

feature.js, line 618

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 838

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 485

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 501

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 564

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 794

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 674

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).