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136 lines
4.4 KiB
JavaScript
136 lines
4.4 KiB
JavaScript
import defined from "../Core/defined.js";
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import DeveloperError from "../Core/DeveloperError.js";
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import Event from "../Core/Event.js";
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import TimeIntervalCollection from "../Core/TimeIntervalCollection.js";
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import Property from "./Property.js";
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/**
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* A {@link Property} which is defined by a {@link TimeIntervalCollection}, where the
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* data property of each {@link TimeInterval} represents the value at time.
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*
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* @alias TimeIntervalCollectionProperty
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* @constructor
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*
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* @example
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* //Create a Cartesian2 interval property which contains data on August 1st, 2012
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* //and uses a different value every 6 hours.
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* var composite = new Cesium.TimeIntervalCollectionProperty();
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* composite.intervals.addInterval(Cesium.TimeInterval.fromIso8601({
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* iso8601 : '2012-08-01T00:00:00.00Z/2012-08-01T06:00:00.00Z',
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* isStartIncluded : true,
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* isStopIncluded : false,
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* data : new Cesium.Cartesian2(2.0, 3.4)
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* }));
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* composite.intervals.addInterval(Cesium.TimeInterval.fromIso8601({
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* iso8601 : '2012-08-01T06:00:00.00Z/2012-08-01T12:00:00.00Z',
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* isStartIncluded : true,
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* isStopIncluded : false,
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* data : new Cesium.Cartesian2(12.0, 2.7)
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* }));
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* composite.intervals.addInterval(Cesium.TimeInterval.fromIso8601({
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* iso8601 : '2012-08-01T12:00:00.00Z/2012-08-01T18:00:00.00Z',
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* isStartIncluded : true,
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* isStopIncluded : false,
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* data : new Cesium.Cartesian2(5.0, 12.4)
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* }));
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* composite.intervals.addInterval(Cesium.TimeInterval.fromIso8601({
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* iso8601 : '2012-08-01T18:00:00.00Z/2012-08-02T00:00:00.00Z',
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* isStartIncluded : true,
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* isStopIncluded : true,
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* data : new Cesium.Cartesian2(85.0, 4.1)
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* }));
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*/
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function TimeIntervalCollectionProperty() {
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this._definitionChanged = new Event();
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this._intervals = new TimeIntervalCollection();
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this._intervals.changedEvent.addEventListener(
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TimeIntervalCollectionProperty.prototype._intervalsChanged,
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this
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);
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}
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Object.defineProperties(TimeIntervalCollectionProperty.prototype, {
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/**
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* Gets a value indicating if this property is constant. A property is considered
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* constant if getValue always returns the same result for the current definition.
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* @memberof TimeIntervalCollectionProperty.prototype
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*
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* @type {Boolean}
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* @readonly
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*/
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isConstant: {
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get: function () {
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return this._intervals.isEmpty;
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},
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},
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/**
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* Gets the event that is raised whenever the definition of this property changes.
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* The definition is changed whenever setValue is called with data different
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* than the current value.
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* @memberof TimeIntervalCollectionProperty.prototype
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*
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* @type {Event}
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* @readonly
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*/
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definitionChanged: {
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get: function () {
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return this._definitionChanged;
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},
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},
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/**
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* Gets the interval collection.
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* @memberof TimeIntervalCollectionProperty.prototype
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*
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* @type {TimeIntervalCollection}
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*/
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intervals: {
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get: function () {
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return this._intervals;
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},
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},
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});
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/**
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* Gets the value of the property at the provided time.
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*
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* @param {JulianDate} time The time for which to retrieve the value.
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* @param {Object} [result] The object to store the value into, if omitted, a new instance is created and returned.
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* @returns {Object} The modified result parameter or a new instance if the result parameter was not supplied.
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*/
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TimeIntervalCollectionProperty.prototype.getValue = function (time, result) {
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//>>includeStart('debug', pragmas.debug);
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if (!defined(time)) {
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throw new DeveloperError("time is required");
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}
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//>>includeEnd('debug');
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var value = this._intervals.findDataForIntervalContainingDate(time);
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if (defined(value) && typeof value.clone === "function") {
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return value.clone(result);
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}
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return value;
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};
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/**
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* Compares this property to the provided property and returns
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* <code>true</code> if they are equal, <code>false</code> otherwise.
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*
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* @param {Property} [other] The other property.
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* @returns {Boolean} <code>true</code> if left and right are equal, <code>false</code> otherwise.
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*/
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TimeIntervalCollectionProperty.prototype.equals = function (other) {
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return (
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this === other || //
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(other instanceof TimeIntervalCollectionProperty && //
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this._intervals.equals(other._intervals, Property.equals))
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);
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};
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/**
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* @private
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*/
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TimeIntervalCollectionProperty.prototype._intervalsChanged = function () {
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this._definitionChanged.raiseEvent(this);
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};
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export default TimeIntervalCollectionProperty;
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