/
TimeIntervalCollectionProperty.js
143 lines (136 loc) · 5.13 KB
/
TimeIntervalCollectionProperty.js
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/*global define*/
define([
'../Core/defined',
'../Core/defineProperties',
'../Core/DeveloperError',
'../Core/Event',
'../Core/TimeIntervalCollection',
'./Property'
], function(
defined,
defineProperties,
DeveloperError,
Event,
TimeIntervalCollection,
Property) {
'use strict';
/**
* A {@link Property} which is defined by a {@link TimeIntervalCollection}, where the
* data property of each {@link TimeInterval} represents the value at time.
*
* @alias TimeIntervalCollectionProperty
* @constructor
*
* @example
* //Create a Cartesian2 interval property which contains data on August 1st, 2012
* //and uses a different value every 6 hours.
* var composite = new Cesium.TimeIntervalCollectionProperty();
* composite.intervals.addInterval(Cesium.TimeInterval.fromIso8601({
* iso8601 : '2012-08-01T00:00:00.00Z/2012-08-01T06:00:00.00Z',
* isStartIncluded : true,
* isStopIncluded : false,
* data : new Cesium.Cartesian2(2.0, 3.4)
* }));
* composite.intervals.addInterval(Cesium.TimeInterval.fromIso8601({
* iso8601 : '2012-08-01T06:00:00.00Z/2012-08-01T12:00:00.00Z',
* isStartIncluded : true,
* isStopIncluded : false,
* data : new Cesium.Cartesian2(12.0, 2.7)
* }));
* composite.intervals.addInterval(Cesium.TimeInterval.fromIso8601({
* iso8601 : '2012-08-01T12:00:00.00Z/2012-08-01T18:00:00.00Z',
* isStartIncluded : true,
* isStopIncluded : false,
* data : new Cesium.Cartesian2(5.0, 12.4)
* }));
* composite.intervals.addInterval(Cesium.TimeInterval.fromIso8601({
* iso8601 : '2012-08-01T18:00:00.00Z/2012-08-02T00:00:00.00Z',
* isStartIncluded : true,
* isStopIncluded : true,
* data : new Cesium.Cartesian2(85.0, 4.1)
* }));
*/
function TimeIntervalCollectionProperty() {
this._definitionChanged = new Event();
this._intervals = new TimeIntervalCollection();
this._intervals.changedEvent.addEventListener(TimeIntervalCollectionProperty.prototype._intervalsChanged, this);
}
defineProperties(TimeIntervalCollectionProperty.prototype, {
/**
* Gets a value indicating if this property is constant. A property is considered
* constant if getValue always returns the same result for the current definition.
* @memberof TimeIntervalCollectionProperty.prototype
*
* @type {Boolean}
* @readonly
*/
isConstant : {
get : function() {
return this._intervals.isEmpty;
}
},
/**
* Gets the event that is raised whenever the definition of this property changes.
* The definition is changed whenever setValue is called with data different
* than the current value.
* @memberof TimeIntervalCollectionProperty.prototype
*
* @type {Event}
* @readonly
*/
definitionChanged : {
get : function() {
return this._definitionChanged;
}
},
/**
* Gets the interval collection.
* @memberof TimeIntervalCollectionProperty.prototype
*
* @type {TimeIntervalCollection}
*/
intervals : {
get : function() {
return this._intervals;
}
}
});
/**
* Gets the value of the property at the provided time.
*
* @param {JulianDate} time The time for which to retrieve the value.
* @param {Object} [result] The object to store the value into, if omitted, a new instance is created and returned.
* @returns {Object} The modified result parameter or a new instance if the result parameter was not supplied.
*/
TimeIntervalCollectionProperty.prototype.getValue = function(time, result) {
//>>includeStart('debug', pragmas.debug);
if (!defined(time)) {
throw new DeveloperError('time is required');
}
//>>includeEnd('debug');
var value = this._intervals.findDataForIntervalContainingDate(time);
if (defined(value) && (typeof value.clone === 'function')) {
return value.clone(result);
}
return value;
};
/**
* Compares this property to the provided property and returns
* <code>true</code> if they are equal, <code>false</code> otherwise.
*
* @param {Property} [other] The other property.
* @returns {Boolean} <code>true</code> if left and right are equal, <code>false</code> otherwise.
*/
TimeIntervalCollectionProperty.prototype.equals = function(other) {
return this === other || //
(other instanceof TimeIntervalCollectionProperty && //
this._intervals.equals(other._intervals, Property.equals));
};
/**
* @private
*/
TimeIntervalCollectionProperty.prototype._intervalsChanged = function() {
this._definitionChanged.raiseEvent(this);
};
return TimeIntervalCollectionProperty;
});