pixelmapFeature

geo. pixelmapFeature

new pixelmapFeature(arg) → {geo.pixelmapFeature}

Description:

  • Create a new instance of class pixelmapFeature

Source:
Parameters:
Name Type Description
arg geo.pixelmapFeature.spec

Options object.
Returns:
Type
geo.pixelmapFeature

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.

ready

Source:
Inherited From:
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

addChild(child) → {this}

Description:

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

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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

bin(valopt, actualValueopt) → {number|this}

Description:

  • 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.

Source:
Inherited From:
Parameters:
Name Type Attributes 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:

The current bin number or a reference to this.

Type
number | this

boxSearch(lowerLeft, upperRight, optsopt, gcsopt) → {geo.feature.searchResult}

Description:

  • Search for features contained within a rectangular region.

Source:
Inherited From:
Parameters:
Name Type Attributes Description
lowerLeft geo.geoPosition

Lower-left corner.
upperRight geo.geoPosition

Upper-right corner.
opts object <optional>

Additional search options.

Properties
Name Type Attributes Default Description
partial boolean <optional>
 false

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:

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

Type
geo.feature.searchResult

buildTime(valopt) → {geo.timestamp|this}

Description:

  • Get/Set timestamp of last time a build happened.

Source:
Inherited From:
Parameters:
Name Type Attributes Description
val geo.timestamp <optional>

The new build timestamp object or undefined to get the current build timestamp object.
Returns:
Type
geo.timestamp | this

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>

color(valopt) → {geo.geoColor|function|this}

Description:

  • Get/Set color accessor.

Source:
Parameters:
Name Type Attributes Description
val geo.geoColor | function <optional>

The new color map accessor or undefined to get the current accessor.
Returns:
Type
geo.geoColor | function | this

data(dataopt) → {array|this}

Description:

  • 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.

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Inherited From:
Parameters:
Name Type Attributes Description
data array <optional>

A new data array or undefined to return the existing array.
Returns:
Type
array | this

dataTime(valopt) → {geo.timestamp|this}

Description:

  • Get/Set timestamp of data change.

Source:
Inherited From:
Parameters:
Name Type Attributes Description
val geo.timestamp <optional>

The new data timestamp object or undefined to get the current data timestamp object.
Returns:
Type
geo.timestamp | this

dependentFeatures(argopt) → {Array.<geo.feature>|this}

Description:

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

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Inherited From:
Parameters:
Name Type Attributes Description
arg Array.<geo.feature> <optional>

If specified, the new list of dependent features. Otherwise, return the current list of dependent features.
Returns:

The current list of dependent features or a reference to this.

Type
Array.<geo.feature> | this

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

featureGcsToDisplay(c) → {geo.screenPosition}

Description:

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

Source:
Inherited From:
Parameters:
Name Type Description
c geo.geoPosition

The input coordinate to convert.
Returns:

Display space coordinates.

Type
geo.screenPosition

gcs(valopt, nullable) → {string|this}

Description:

  • Get/Set the projection of the feature.

Source:
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Parameters:
Name Type Attributes 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:

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.

Type
string | this

geoIsOn(event, handleropt) → {boolean}

Description:

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

Source:
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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.

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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.

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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

indexModified(idxopt, idx2opt) → {this|Array.<number>}

Description:

  • Mark that an index's data value (and hence its color) has changed without marking all of the data array as changed. If this function is called without any parameters, it clears the tracked changes.

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

The lowest data index that has changed. If undefined, return the current tracked changed range.
idx2 number | 'clear' <optional>

If an index was specified in idx and this is specified, the highest index (inclusive) that has changed. If returning the tracked changed range and this is clear, clear the tracked range.
Returns:

When returning a range, this is the lowest and highest index values that have changed (inclusive), so their range is [0, data.length).

Type
this | Array.<number>

layer() → {geo.layer}

Description:

  • Get the layer referenced by the feature.

Source:
Inherited From:
Returns:

The layer associated with the feature.

Type
geo.layer

maxIndex() → {number}

Description:

  • Get the maximum index value from the pixelmap. This is a value present in the pixelmap.

Source:
Returns:

The maximum index value.

Type
number

modified() → {this}

Description:

  • Update the timestamp to the next global timestamp value.

Source:
Inherited From:
Returns:
Type
this

mouseOverOrderHighestIndex(evt)

Description:

  • 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.

Source:
Inherited From:
Parameters:
Name Type Description
evt geo.event

The event; this should be triggered from geo.event.feature.mouseover_order.

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:
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Parameters:
Name Type Description
handler function

A function taking no arguments.
Returns:
Type
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

pointSearch(geo, gcsopt) → {geo.feature.searchResult}

Description:

  • Search for features containing the given point. This should be defined in relevant subclasses.

Source:
Inherited From:
Parameters:
Name Type Attributes Description
geo geo.geoPosition

Coordinate.
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:

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

Type
geo.feature.searchResult

polygonSearch(poly, optsopt, gcsopt) → {geo.feature.searchResult}

Description:

  • Search for features contained within a polygon. This should be defined in relevant subclasses.

Source:
Inherited From:
Parameters:
Name Type Attributes 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.

Properties
Name Type Attributes Default Description
partial boolean <optional>
 false

If truthy, include features that are partially in the polygon, 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:

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

Type
geo.feature.searchResult

position(valopt) → {geo.geoPosition|function|this}

Description:

  • Get/Set position accessor.

Source:
Parameters:
Name Type Attributes 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. See geo.quadFeature.position for for details on this position.
Returns:
Type
geo.geoPosition | function | this

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 used by the feature.

Source:
Inherited From:
Returns:

The renderer used to render the feature.

Type
geo.renderer

selectionAPI(argopt, directopt) → {boolean|string|this}

Description:

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

Source:
Inherited From:
Parameters:
Name Type Attributes 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:

Either the selectionAPI state or the feature instance.

Type
boolean | string | this

style(arg1opt, arg2opt) → {object|this}

Description:

  • 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.

Source:
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Parameters:
Name Type Attributes 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:

Either the entire style object, the value of a specific style, or the current class instance.

Type
object | this

style.get(keyopt) → {function|object}

Description:

  • 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.

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Parameters:
Name Type Attributes 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:

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

Type
function | object

timestamp() → {number}

Description:

  • Get time.

Source:
Inherited From:
Returns:

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

Type
number

updateStyleFromArray(keyOrObject, styleArray, refreshopt) → {this}

Description:

  • 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.

Source:
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Parameters:
Name Type Attributes 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 <optional>
 false

true to redraw the feature when it has been updated. If an object with styles is passed, the redraw is only done once.
Returns:

The feature instance.

Type
this

updateTime(valopt) → {geo.timestamp|this}

Description:

  • Get/Set timestamp of last time an update happened.

Source:
Inherited From:
Parameters:
Name Type Attributes Description
val geo.timestamp <optional>

The new update timestamp object or undefined to get the current update timestamp object.
Returns:
Type
geo.timestamp | this

url(valopt) → {string|function|this}

Description:

  • Get/Set url accessor.

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

If not specified, return the current url accessor. If specified, use this for the url accessor and return this.
Returns:
Type
string | function | this

visible(valopt, directopt) → {boolean|this}

Description:

  • Get/Set the visibility of the feature.

Source:
Inherited From:
Parameters:
Name Type Attributes 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:

Either the visibility (if getting) or the feature (if setting).

Type
boolean | this

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

Description:

  • Create a pixelmapFeature from an object.

Source:
See:
Parameters:
Name Type Description
layer geo.layer

The layer to add the feature to
spec geo.pixelmapFeature.spec

The object specification
Returns:
Type
geo.pixelmapFeature | null

Type Definitions

info

Description:

  • Pixelmap feature information record.

Source:
Properties:
Name Type Description
width number

The width of the source image.
height number

The width of the source image.
context CanvasRenderingContext2D

The HTMLCanvasElement context used for handling the pixelmap.
imageData ImageData

The context's image data.
indices Array.<number>

An array, one per pixel, of the index value in the image. This decodes the pixel value to the corresponding integer.
number}

area The number of pixels in the image. This is width * height.
mappedColors Array.<object>

This has one entry for each distinct index value. Each entry has first and last with the first and last pixel locations where that index occurs. Note that last is the inclusive value of the location (so its maximum possible value is size - 1).

Pixelmap feature information record.

Type:
  • object

spec

Description:

  • Pixelmap feature specification.

Source:
Properties:
Name Type Attributes Default Description
url string | function | HTMLImageElement <optional>

URL of a pixel map or an HTML Image element. The rgb data is interpreted as an index of the form 0xbbggrr. The alpha channel is ignored.
color geo.geoColor | function <optional>

The color that should be used for each data element. Data elements correspond to the indices in the pixel map. If an index is larger than the number of data elements, it will be transparent. If there is more data than there are indices, it is ignored.
position geo.geoPosition | function <optional>

Position of the image. Default is (data). The position is an Object which specifies the corners of the quad: ll, lr, ur, ul. At least two opposite corners must be specified. The corners do not have to physically correspond to the order specified, but rather correspond to that part of the image map. If a corner is unspecified, it will use the x coordinate from one adjacent corner, the y coordinate from the other adjacent corner, and the average z value of those two corners. For instance, if ul is unspecified, it is {x: ll.x, y: ur.y}. Note that each quad is rendered as a pair of triangles: (ll, lr, ul) and (ur, ul, lr). Nothing special is done for quads that are not convex or quads that have substantially different transformations for those two triangles.
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.
style geo.feature.styleSpec <optional>

An object that contains style values for the feature.

Pixelmap feature specification.

Type: