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351 lines
15 KiB
JavaScript
351 lines
15 KiB
JavaScript
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/**
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* Line charts
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*/
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$.fn.sparkline.line = line = createClass($.fn.sparkline._base, {
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type: 'line',
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init: function (el, values, options, width, height) {
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line._super.init.call(this, el, values, options, width, height);
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this.vertices = [];
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this.regionMap = [];
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this.xvalues = [];
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this.yvalues = [];
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this.yminmax = [];
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this.hightlightSpotId = null;
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this.lastShapeId = null;
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this.initTarget();
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},
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getRegion: function (el, x, y) {
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var i,
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regionMap = this.regionMap; // maps regions to value positions
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for (i = regionMap.length; i--;) {
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if (regionMap[i] !== null && x >= regionMap[i][0] && x <= regionMap[i][1]) {
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return regionMap[i][2];
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}
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}
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return undefined;
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},
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getCurrentRegionFields: function () {
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var currentRegion = this.currentRegion;
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return {
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isNull: this.yvalues[currentRegion] === null,
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x: this.xvalues[currentRegion],
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y: this.yvalues[currentRegion],
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color: this.options.get('lineColor'),
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fillColor: this.options.get('fillColor'),
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offset: currentRegion
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};
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},
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renderHighlight: function () {
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var currentRegion = this.currentRegion,
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target = this.target,
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vertex = this.vertices[currentRegion],
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options = this.options,
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spotRadius = options.get('spotRadius'),
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highlightSpotColor = options.get('highlightSpotColor'),
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highlightLineColor = options.get('highlightLineColor'),
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highlightSpot, highlightLine;
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if (!vertex) {
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return;
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}
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if (spotRadius && highlightSpotColor) {
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highlightSpot = target.drawCircle(vertex[0], vertex[1],
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spotRadius, undefined, highlightSpotColor);
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this.highlightSpotId = highlightSpot.id;
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target.insertAfterShape(this.lastShapeId, highlightSpot);
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}
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if (highlightLineColor) {
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highlightLine = target.drawLine(vertex[0], this.canvasTop, vertex[0],
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this.canvasTop + this.canvasHeight, highlightLineColor);
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this.highlightLineId = highlightLine.id;
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target.insertAfterShape(this.lastShapeId, highlightLine);
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}
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},
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removeHighlight: function () {
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var target = this.target;
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if (this.highlightSpotId) {
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target.removeShapeId(this.highlightSpotId);
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this.highlightSpotId = null;
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}
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if (this.highlightLineId) {
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target.removeShapeId(this.highlightLineId);
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this.highlightLineId = null;
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}
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},
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scanValues: function () {
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var values = this.values,
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valcount = values.length,
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xvalues = this.xvalues,
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yvalues = this.yvalues,
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yminmax = this.yminmax,
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i, val, isStr, isArray, sp;
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for (i = 0; i < valcount; i++) {
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val = values[i];
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isStr = typeof(values[i]) === 'string';
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isArray = typeof(values[i]) === 'object' && values[i] instanceof Array;
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sp = isStr && values[i].split(':');
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if (isStr && sp.length === 2) { // x:y
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xvalues.push(Number(sp[0]));
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yvalues.push(Number(sp[1]));
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yminmax.push(Number(sp[1]));
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} else if (isArray) {
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xvalues.push(val[0]);
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yvalues.push(val[1]);
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yminmax.push(val[1]);
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} else {
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xvalues.push(i);
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if (values[i] === null || values[i] === 'null') {
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yvalues.push(null);
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} else {
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yvalues.push(Number(val));
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yminmax.push(Number(val));
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}
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}
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}
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if (this.options.get('xvalues')) {
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xvalues = this.options.get('xvalues');
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}
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this.maxy = this.maxyorg = Math.max.apply(Math, yminmax);
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this.miny = this.minyorg = Math.min.apply(Math, yminmax);
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this.maxx = Math.max.apply(Math, xvalues);
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this.minx = Math.min.apply(Math, xvalues);
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this.xvalues = xvalues;
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this.yvalues = yvalues;
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this.yminmax = yminmax;
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},
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processRangeOptions: function () {
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var options = this.options,
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normalRangeMin = options.get('normalRangeMin'),
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normalRangeMax = options.get('normalRangeMax');
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if (normalRangeMin !== undefined) {
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if (normalRangeMin < this.miny) {
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this.miny = normalRangeMin;
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}
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if (normalRangeMax > this.maxy) {
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this.maxy = normalRangeMax;
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}
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}
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if (options.get('chartRangeMin') !== undefined && (options.get('chartRangeClip') || options.get('chartRangeMin') < this.miny)) {
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this.miny = options.get('chartRangeMin');
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}
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if (options.get('chartRangeMax') !== undefined && (options.get('chartRangeClip') || options.get('chartRangeMax') > this.maxy)) {
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this.maxy = options.get('chartRangeMax');
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}
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if (options.get('chartRangeMinX') !== undefined && (options.get('chartRangeClipX') || options.get('chartRangeMinX') < this.minx)) {
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this.minx = options.get('chartRangeMinX');
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}
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if (options.get('chartRangeMaxX') !== undefined && (options.get('chartRangeClipX') || options.get('chartRangeMaxX') > this.maxx)) {
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this.maxx = options.get('chartRangeMaxX');
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}
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},
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drawNormalRange: function (canvasLeft, canvasTop, canvasHeight, canvasWidth, rangey) {
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var normalRangeMin = this.options.get('normalRangeMin'),
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normalRangeMax = this.options.get('normalRangeMax'),
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ytop = canvasTop + Math.round(canvasHeight - (canvasHeight * ((normalRangeMax - this.miny) / rangey))),
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height = Math.round((canvasHeight * (normalRangeMax - normalRangeMin)) / rangey);
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this.target.drawRect(canvasLeft, ytop, canvasWidth, height, undefined, this.options.get('normalRangeColor')).append();
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},
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render: function () {
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var options = this.options,
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target = this.target,
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canvasWidth = this.canvasWidth,
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canvasHeight = this.canvasHeight,
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vertices = this.vertices,
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spotRadius = options.get('spotRadius'),
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regionMap = this.regionMap,
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rangex, rangey, yvallast,
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canvasTop, canvasLeft,
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vertex, path, paths, x, y, xnext, xpos, xposnext,
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last, next, yvalcount, lineShapes, fillShapes, plen,
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valueSpots, hlSpotsEnabled, color, xvalues, yvalues, i;
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if (!line._super.render.call(this)) {
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return;
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}
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this.scanValues();
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this.processRangeOptions();
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xvalues = this.xvalues;
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yvalues = this.yvalues;
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if (!this.yminmax.length || this.yvalues.length < 2) {
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// empty or all null valuess
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return;
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}
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canvasTop = canvasLeft = 0;
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rangex = this.maxx - this.minx === 0 ? 1 : this.maxx - this.minx;
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rangey = this.maxy - this.miny === 0 ? 1 : this.maxy - this.miny;
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yvallast = this.yvalues.length - 1;
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if (spotRadius && (canvasWidth < (spotRadius * 4) || canvasHeight < (spotRadius * 4))) {
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spotRadius = 0;
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}
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if (spotRadius) {
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// adjust the canvas size as required so that spots will fit
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hlSpotsEnabled = options.get('highlightSpotColor') && !options.get('disableInteraction');
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if (hlSpotsEnabled || options.get('minSpotColor') || (options.get('spotColor') && yvalues[yvallast] === this.miny)) {
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canvasHeight -= Math.ceil(spotRadius);
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}
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if (hlSpotsEnabled || options.get('maxSpotColor') || (options.get('spotColor') && yvalues[yvallast] === this.maxy)) {
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canvasHeight -= Math.ceil(spotRadius);
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canvasTop += Math.ceil(spotRadius);
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}
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if (hlSpotsEnabled ||
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((options.get('minSpotColor') || options.get('maxSpotColor')) && (yvalues[0] === this.miny || yvalues[0] === this.maxy))) {
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canvasLeft += Math.ceil(spotRadius);
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canvasWidth -= Math.ceil(spotRadius);
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}
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if (hlSpotsEnabled || options.get('spotColor') ||
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(options.get('minSpotColor') || options.get('maxSpotColor') &&
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(yvalues[yvallast] === this.miny || yvalues[yvallast] === this.maxy))) {
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canvasWidth -= Math.ceil(spotRadius);
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}
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}
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canvasHeight--;
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if (options.get('normalRangeMin') !== undefined && !options.get('drawNormalOnTop')) {
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this.drawNormalRange(canvasLeft, canvasTop, canvasHeight, canvasWidth, rangey);
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}
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path = [];
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paths = [path];
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last = next = null;
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yvalcount = yvalues.length;
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for (i = 0; i < yvalcount; i++) {
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x = xvalues[i];
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xnext = xvalues[i + 1];
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y = yvalues[i];
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xpos = canvasLeft + Math.round((x - this.minx) * (canvasWidth / rangex));
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xposnext = i < yvalcount - 1 ? canvasLeft + Math.round((xnext - this.minx) * (canvasWidth / rangex)) : canvasWidth;
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next = xpos + ((xposnext - xpos) / 2);
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regionMap[i] = [last || 0, next, i];
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last = next;
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if (y === null) {
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if (i) {
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if (yvalues[i - 1] !== null) {
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path = [];
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paths.push(path);
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}
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vertices.push(null);
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}
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} else {
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if (y < this.miny) {
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y = this.miny;
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}
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if (y > this.maxy) {
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y = this.maxy;
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}
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if (!path.length) {
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// previous value was null
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path.push([xpos, canvasTop + canvasHeight]);
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}
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vertex = [xpos, canvasTop + Math.round(canvasHeight - (canvasHeight * ((y - this.miny) / rangey)))];
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path.push(vertex);
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vertices.push(vertex);
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}
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}
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lineShapes = [];
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fillShapes = [];
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plen = paths.length;
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for (i = 0; i < plen; i++) {
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path = paths[i];
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if (path.length) {
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if (options.get('fillColor')) {
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path.push([path[path.length - 1][0], (canvasTop + canvasHeight)]);
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fillShapes.push(path.slice(0));
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path.pop();
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}
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// if there's only a single point in this path, then we want to display it
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// as a vertical line which means we keep path[0] as is
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if (path.length > 2) {
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// else we want the first value
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path[0] = [path[0][0], path[1][1]];
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}
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lineShapes.push(path);
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}
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}
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// draw the fill first, then optionally the normal range, then the line on top of that
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plen = fillShapes.length;
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for (i = 0; i < plen; i++) {
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target.drawShape(fillShapes[i],
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options.get('fillColor'), options.get('fillColor')).append();
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}
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if (options.get('normalRangeMin') !== undefined && options.get('drawNormalOnTop')) {
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this.drawNormalRange(canvasLeft, canvasTop, canvasHeight, canvasWidth, rangey);
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}
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plen = lineShapes.length;
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for (i = 0; i < plen; i++) {
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target.drawShape(lineShapes[i], options.get('lineColor'), undefined,
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options.get('lineWidth')).append();
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}
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if (spotRadius && options.get('valueSpots')) {
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valueSpots = options.get('valueSpots');
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if (valueSpots.get === undefined) {
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valueSpots = new RangeMap(valueSpots);
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}
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for (i = 0; i < yvalcount; i++) {
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color = valueSpots.get(yvalues[i]);
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if (color) {
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target.drawCircle(canvasLeft + Math.round((xvalues[i] - this.minx) * (canvasWidth / rangex)),
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canvasTop + Math.round(canvasHeight - (canvasHeight * ((yvalues[i] - this.miny) / rangey))),
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spotRadius, undefined,
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color).append();
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}
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}
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}
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if (spotRadius && options.get('spotColor') && yvalues[yvallast] !== null) {
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target.drawCircle(canvasLeft + Math.round((xvalues[xvalues.length - 1] - this.minx) * (canvasWidth / rangex)),
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canvasTop + Math.round(canvasHeight - (canvasHeight * ((yvalues[yvallast] - this.miny) / rangey))),
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spotRadius, undefined,
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options.get('spotColor')).append();
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}
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if (this.maxy !== this.minyorg) {
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if (spotRadius && options.get('minSpotColor')) {
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x = xvalues[$.inArray(this.minyorg, yvalues)];
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target.drawCircle(canvasLeft + Math.round((x - this.minx) * (canvasWidth / rangex)),
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canvasTop + Math.round(canvasHeight - (canvasHeight * ((this.minyorg - this.miny) / rangey))),
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spotRadius, undefined,
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options.get('minSpotColor')).append();
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}
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if (spotRadius && options.get('maxSpotColor')) {
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x = xvalues[$.inArray(this.maxyorg, yvalues)];
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target.drawCircle(canvasLeft + Math.round((x - this.minx) * (canvasWidth / rangex)),
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canvasTop + Math.round(canvasHeight - (canvasHeight * ((this.maxyorg - this.miny) / rangey))),
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spotRadius, undefined,
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options.get('maxSpotColor')).append();
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}
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}
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this.lastShapeId = target.getLastShapeId();
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this.canvasTop = canvasTop;
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target.render();
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}
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});
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