Class: Theme

Extends

• ol.source.ImageCanvas

Methods

addFeatures(features)

Theme.js, line 175

An abstract method, which can be implemented by an instantiated subclass. Add data to the thematic map layer. The thematic graph only receives SuperMap.Feature.Vector type data, Feature will be stored in the features attribute, which is stored as an array.

Name	Type	Description
features	ol.supermap.ThemeFeature | GeoJSONObject | ol.Feature	The pending features include the ol.supermap.ThemeFeature type, the GeoJOSN specification data type, and the ol.feature type.

destroy()

Theme.js, line 120

Disposes the resource. The property that references resource is set to null.

destroyFeatures(features)

Theme.js, line 139

Destroy one features.

Name	Type	Description
features	SuperMap.Feature.Vector	The feature to be destroy.

fire(type, event)

Theme.js, line 337

Add thematic element event listener.

Name	Type	Description
type	string	Type of the event.
event	string	Name of the event.

getFeatureBy(property, value){SuperMap.Feature.Vector}

Theme.js, line 259

Traversing each feature in the element array features of the thematic graph, When feature[property] === value, return to this feature (and return only to the first one).

Name	Type	Description
property	string	The name of an attribute for the feature.
value	string	The value corresponding to property.

Returns:

Type	Description
SuperMap.Feature.Vector	The first vector element that matches the attributes and values.

getFeatureById(featureId){SuperMap.Feature.Vector}

Theme.js, line 279

Return to a corresponding vector elements by a specified ID.

Name	Type	Description
featureId	string	Property ID of the vector feature.

Returns:

Type	Description
SuperMap.Feature.Vector	The feature corresponding to ID, if it does not exist, return to null.

getFeatures(){SuperMap.Feature.Vector}

Theme.js, line 244

Look at the valid data in the current layer.

Returns:

Type	Description
SuperMap.Feature.Vector	The user joins the valid data of the layer.

getFeaturesByAttribute(attrName, attrValue){Array.<SuperMap.Feature.Vector>}

Theme.js, line 289

By giving the key and value of an attribute, return to all the matched features.

Name	Type	Description
attrName	string	Key of the property.
attrValue	string	Property ID of the vector features.

Returns:

Type	Description
Array.<SuperMap.Feature.Vector>	A matching feature array.

getLocalXY(coordinate)

Theme.js, line 442

Get the coordinate system.

Name	Type	Description
coordinate	Object	Coordinate position.

on(event, callback)

Theme.js, line 319

Add thematic element event listener. The events supported include: click, mousedown, mousemove, mouseout, mouseover, mouseup.

Name	Type	Description
event	string	Name of the event.
callback	RequestCallback	event callbacks.

redrawThematicFeatures(extent)

Theme.js, line 311

An abstract method, which can be implemented by an instantiated subclass. Redraw the thematic elements.

Name	Type	Description
extent	Array	Map range calculated at the current level

removeAllFeatures()

Theme.js, line 232

Clear all the vector elements of the current layer.

removeFeatures(features)

Theme.js, line 186

Delete feature from the thematic map. This function removes all the vector elements that are passed in. Each item in the features array in the parameter must be the feature that has been added to the current layer. If you can't determine the feature array, you can call removeAllFeatures to delete all feature. If there are more elements in the feature array to delete, it is recommended to use removeAllFeatures, delete all feature, and then add it again. This will be more efficient.

Name	Type	Description
features	Array.<SuperMap.Feature.Vector>	The array of the feature to be deleted.

rotate(pixelP, rotation, center)

Theme.js, line 470

Get the pixel coordinates after a pixel coordinate point pixelP revolves the rotation arc in the center of the center counterclockwise.

Name	Type	Description
pixelP	number	Pixel coordinates point position.
rotation	number	Angle of rotation.
center	number	Center position.

scale(pixelP, center, scaleRatio){Array.<number>}

Theme.js, line 483

Get the pixel coordinates of a pixel coordinate point pixelP is scaleRatio times larger than the center.

Name	Type	Description
pixelP	Object	Pixel point.
center	Object	Center position.
scaleRatio	number	Scaling multiplier.

Returns:

Type	Description
Array.<number>	Return array ratio.

setOpacity(opacity)

Theme.js, line 157

Set the opacity of the layer and take the value between [0-1].

Name	Type	Description
opacity	number	opacity.

toFeature(features){SuperMap.Feature.Vector}

Theme.js, line 539

Converted to an iClient feature, this method will be deprecated and replaced by ol.source.Theme#toiClientFeature.

Name	Type	Description
features	ol.supermap.ThemeFeature | GeoJSONObject | ol.Feature	The pending features include the ol.supermap.ThemeFeature type, the GeoJOSN specification data type, and the ol.feature type.

Deprecated

• Yes

Returns:

Type	Description
SuperMap.Feature.Vector	IClient feature after conversion.

toiClientFeature(features){SuperMap.Feature.Vector}

Theme.js, line 497

Convert to the iClient features.

Name	Type	Description
features	ol.supermap.ThemeFeature | GeoJSONObject | ol.Feature	The pending features include the ol.supermap.ThemeFeature type, the GeoJOSN specification data type, and the ol.feature type.

Returns:

Type	Description
SuperMap.Feature.Vector	The converted iClient features.

un(event, callback)

Theme.js, line 404

Removal of thematic element event listener.

Name	Type	Description
event	string	Name of the event.
callback	RequestCallback	event callbacks.