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322 lines
10 KiB
322 lines
10 KiB
2 years ago
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/*
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YUI 3.17.2 (build 9c3c78e)
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Copyright 2014 Yahoo! Inc. All rights reserved.
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Licensed under the BSD License.
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http://yuilibrary.com/license/
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*/
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YUI.add('series-candlestick', function (Y, NAME) {
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/**
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* Provides functionality for creating a candlestick series.
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*
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* @module charts
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* @submodule series-candlestick
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*/
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/**
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* The CandlestickSeries class renders columns (candles) and lines (wicks) representing the open, high, low and close
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* values for a chart.
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*
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* @class CandlestickSeries
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* @extends RangeSeries
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* @constructor
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* @param {Object} config (optional) Configuration parameters.
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* @submodule series-candlestick
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*/
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function CandlestickSeries()
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{
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CandlestickSeries.superclass.constructor.apply(this, arguments);
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}
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CandlestickSeries.NAME = "candlestickSeries";
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CandlestickSeries.ATTRS = {
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/**
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* Read-only attribute indicating the type of series.
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*
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* @attribute type
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* @type String
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* @readOnly
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* @default candlestick
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*/
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type: {
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value: "candlestick"
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},
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/**
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* The graphic in which drawings will be rendered.
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*
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* @attribute graphic
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* @type Graphic
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*/
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graphic: {
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lazyAdd: false,
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setter: function(val) {
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//woraround for Attribute order of operations bug
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if(!this.get("rendered")) {
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this.set("rendered", true);
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}
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this.set("upcandle", val.addShape({
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type: "path"
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}));
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this.set("downcandle", val.addShape({
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type: "path"
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}));
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this.set("wick", val.addShape({
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type: "path"
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}));
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return val;
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}
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},
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/**
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* Reference to the candlestick used when the close value is higher than the open value.
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*
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* @attribute upcandle
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* @type Path
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*/
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upcandle: {},
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/**
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* Reference to the candlestick used when the open value is higher than the close value.
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*
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* @attribute downcandle
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* @type Path
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*/
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downcandle: {},
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/**
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* Reference to the line drawn between the high and low values.
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*
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* @attribute wick
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* @type Path
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*/
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wick: {}
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/**
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* Style properties used for drawing candles and wicks. This attribute is inherited from `RangeSeries`. Below are the default values:
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* <dl>
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* <dt>upcandle</dt><dd>Properties for a candle representing a period that closes higher than it opens.
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* <dl>
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* <dt>fill</dt><dd>A hash containing the following values:
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* <dl>
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* <dt>color</dt><dd>Color of the fill. The default value is "#00aa00".</dd>
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* </dd>
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* <dt>alpha</dt><dd>Number from 0 to 1 indicating the opacity of the marker fill. The default value is 1.</dd>
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* </dl>
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* </dd>
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* <dt>border</dt><dd>A hash containing the following values:
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* <dl>
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* <dt>color</dt><dd>Color of the border. The default value is "#000000".</dd>
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* <dt>alpha</dt><dd>Number from 0 to 1 indicating the opacity of the marker border. The default value is 1.</dd>
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* <dt>weight</dt><dd>Number indicating the width of the border. The default value is 0.</dd>
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* </dl>
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* </dd>
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* </dl>
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* </dd>
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* <dt>downcandle</dt><dd>Properties for a candle representing a period that opens higher than it closes.
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* <dl>
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* <dt>fill</dt><dd>A hash containing the following values:
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* <dl>
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* <dt>color</dt><dd>Color of the fill. The default value is "#aa0000".</dd>
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* </dd>
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* <dt>alpha</dt><dd>Number from 0 to 1 indicating the opacity of the marker fill. The default value is 1.</dd>
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* </dl>
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* </dd>
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* <dt>border</dt><dd>A hash containing the following values:
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* <dl>
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* <dt>color</dt><dd>Color of the border. The default value is "#000000".</dd>
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* <dt>alpha</dt><dd>Number from 0 to 1 indicating the opacity of the marker border. The default value is 1.</dd>
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* <dt>weight</dt><dd>Number indicating the width of the border. The default value is 0.</dd>
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* </dl>
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* </dd>
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* </dl>
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* </dd>
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* <dt>wick</dt><dd>Properties for the wick, which is a line drawn from the high point of the period to the low point of the period.
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* <dl>
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* <dt>color</dt><dd>The color of the wick. The default value is "#000000".</dd>
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* <dt>weight</dt><dd>The weight of the wick. The default value is 1.</dd>
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* <dt>alpha</dt><dd>Number from 0 to 1 indicating the opacity of the wick. The default value is 1.</dd>
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* </dl>
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* </dd>
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* </dl>
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*
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* @attribute styles
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* @type Object
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*/
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};
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Y.extend(CandlestickSeries, Y.RangeSeries, {
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/**
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* Draws markers for an Candlestick series.
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*
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* @method
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* @param {Array} xcoords The xcoordinates to be plotted.
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* @param {Array} opencoords The coordinates representing the open values.
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* @param {Array} highcoords The coordinates representing the high values.
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* @param {Array} lowcoords The coordinates representing the low values.
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* @param {Array} closecoords The coordinates representing the close values.
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* @param {Number} len The number of x coordinates to plot.
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* @param {Number} width The width of each candlestick marker.
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* @param {Number} halfwidth Half the width of each candlestick marker.
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* @param {Object} styles The styles for the series.
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* @private
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*/
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_drawMarkers: function(xcoords, opencoords, highcoords, lowcoords, closecoords, len, width, halfwidth, styles)
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{
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var upcandle = this.get("upcandle"),
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downcandle = this.get("downcandle"),
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candle,
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wick = this.get("wick"),
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wickStyles = styles.wick,
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wickWidth = wickStyles.width,
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cx,
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opencoord,
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highcoord,
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lowcoord,
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closecoord,
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left,
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right,
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top,
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bottom,
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height,
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leftPadding = styles.padding.left,
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up,
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i,
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isNumber = Y.Lang.isNumber;
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upcandle.set(styles.upcandle);
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downcandle.set(styles.downcandle);
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wick.set({
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fill: wickStyles.fill,
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stroke: wickStyles.stroke,
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shapeRendering: wickStyles.shapeRendering
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});
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upcandle.clear();
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downcandle.clear();
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wick.clear();
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for(i = 0; i < len; i = i + 1)
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{
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cx = Math.round(xcoords[i] + leftPadding);
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left = cx - halfwidth;
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right = cx + halfwidth;
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opencoord = Math.round(opencoords[i]);
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highcoord = Math.round(highcoords[i]);
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lowcoord = Math.round(lowcoords[i]);
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closecoord = Math.round(closecoords[i]);
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up = opencoord > closecoord;
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top = up ? closecoord : opencoord;
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bottom = up ? opencoord : closecoord;
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height = bottom - top;
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candle = up ? upcandle : downcandle;
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if(candle && isNumber(left) && isNumber(top) && isNumber(width) && isNumber(height))
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{
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candle.drawRect(left, top, width, height);
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}
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if(isNumber(cx) && isNumber(highcoord) && isNumber(lowcoord))
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{
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wick.drawRect(cx - wickWidth/2, highcoord, wickWidth, lowcoord - highcoord);
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}
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}
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upcandle.end();
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downcandle.end();
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wick.end();
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wick.toBack();
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},
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/**
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* Toggles visibility
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*
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* @method _toggleVisible
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* @param {Boolean} visible indicates visibilitye
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* @private
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*/
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_toggleVisible: function(visible)
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{
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this.get("upcandle").set("visible", visible);
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this.get("downcandle").set("visible", visible);
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this.get("wick").set("visible", visible);
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},
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/**
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* Destructor implementation for the CartesianSeries class. Calls destroy on all Graphic instances.
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*
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* @method destructor
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* @protected
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*/
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destructor: function()
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{
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var upcandle = this.get("upcandle"),
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downcandle = this.get("downcandle"),
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wick = this.get("wick");
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if(upcandle)
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{
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upcandle.destroy();
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}
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if(downcandle)
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{
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downcandle.destroy();
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}
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if(wick)
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{
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wick.destroy();
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}
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},
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/**
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* Gets the default value for the `styles` attribute. Overrides
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* base implementation.
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*
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* @method _getDefaultStyles
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* @return Object
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* @private
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*/
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_getDefaultStyles: function()
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{
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var styles = {
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upcandle: {
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shapeRendering: "crispEdges",
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fill: {
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color: "#00aa00",
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alpha: 1
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},
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stroke: {
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color: "#000000",
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alpha: 1,
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weight: 0
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}
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},
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downcandle: {
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shapeRendering: "crispEdges",
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fill: {
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color: "#aa0000",
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alpha: 1
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},
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stroke: {
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color: "#000000",
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alpha: 1,
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weight: 0
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}
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},
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wick: {
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shapeRendering: "crispEdges",
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width: 1,
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fill: {
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color: "#000000",
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alpha: 1
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},
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stroke: {
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color: "#000000",
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alpha: 1,
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weight: 0
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}
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}
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};
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return this._mergeStyles(styles, CandlestickSeries.superclass._getDefaultStyles());
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}
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});
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Y.CandlestickSeries = CandlestickSeries;
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}, '3.17.2', {"requires": ["series-range"]});
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