94 lines
2.5 KiB
JavaScript
94 lines
2.5 KiB
JavaScript
define("dstore/charting/StoreSeries", [
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'dojo/_base/lang',
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'dojo/_base/declare',
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'dojo/_base/array'
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], function (lang, declare, array) {
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return declare(null, {
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constructor: function (collection, value) {
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// summary:
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// Series adapter for dstore object stores.
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// collection: dstore/api/Store.Collection
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// A dstore object store.
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// value: Function|Object|String
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// Function, which takes an object handle, and
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// produces an output possibly inspecting the store's item. Or
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// a dictionary object, which tells what names to extract from
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// an object and how to map them to an output. Or a string, which
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// is a numeric field name to use for plotting. If undefined, null
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// or empty string (the default), "value" field is extracted.
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this.collection = collection.track ? collection.track() : collection;
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if (value) {
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if (typeof value === 'function') {
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this.value = value;
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} else if (typeof value === 'object') {
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this.value = function (object) {
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var o = {};
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for (var key in value) {
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o[key] = object[value[key]];
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}
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return o;
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};
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} else {
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this.value = function (object) {
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return object[value];
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};
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}
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} else {
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this.value = function (object) {
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return object.value;
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};
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}
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this.data = [];
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this._initialRendering = false;
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this.fetch();
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},
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destroy: function () {
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// summary:
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// Clean up before GC.
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var tracking = this.collection.tracking;
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tracking && tracking.remove();
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},
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setSeriesObject: function (series) {
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// summary:
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// Sets a dojox.charting.Series object we will be working with.
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// series: dojox/charting/Series
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// Our interface to the chart.
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this.series = series;
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},
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fetch: function () {
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// summary:
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// Fetches data from the store and updates a chart.
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var collection = this.collection,
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update = lang.hitch(this, this._update);
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collection.fetch().then(lang.hitch(this, function (results) {
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this.objects = results;
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update();
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if (collection.tracking) {
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collection.on('add, update, delete', update);
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}
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}));
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},
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_update: function () {
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var self = this;
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this.data = array.map(this.objects, function (object) {
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return self.value(object, self.collection);
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});
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if (this.series) {
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this.series.chart.updateSeries(this.series.name, this, this._initialRendering);
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this._initialRendering = false;
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this.series.chart.delayedRender();
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}
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}
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});
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});
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