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255 lines
9.8 KiB
JavaScript
255 lines
9.8 KiB
JavaScript
(function() {
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"use strict";
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var root = this,
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Chart = root.Chart,
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helpers = Chart.helpers;
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Chart.defaults.radar = {
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scale: {
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type: "radialLinear",
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},
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elements: {
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line: {
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tension: 0, // no bezier in radar
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}
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},
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};
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Chart.controllers.radar = function(chart, datasetIndex) {
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this.initialize.call(this, chart, datasetIndex);
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};
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helpers.extend(Chart.controllers.radar.prototype, {
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initialize: function(chart, datasetIndex) {
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this.chart = chart;
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this.index = datasetIndex;
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this.linkScales();
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this.addElements();
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},
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updateIndex: function(datasetIndex) {
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this.index = datasetIndex;
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},
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linkScales: function() {
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// No need. Single scale only
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},
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getDataset: function() {
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return this.chart.data.datasets[this.index];
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},
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getScaleForId: function(scaleID) {
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return this.chart.scales[scaleID];
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},
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addElements: function() {
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this.getDataset().metaData = this.getDataset().metaData || [];
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this.getDataset().metaDataset = this.getDataset().metaDataset || new Chart.elements.Line({
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_chart: this.chart.chart,
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_datasetIndex: this.index,
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_points: this.getDataset().metaData,
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_loop: true
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});
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helpers.each(this.getDataset().data, function(value, index) {
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this.getDataset().metaData[index] = this.getDataset().metaData[index] || new Chart.elements.Point({
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_chart: this.chart.chart,
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_datasetIndex: this.index,
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_index: index,
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_model: {
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x: 0, //xScale.getPixelForValue(null, index, true),
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y: 0, //this.chartArea.bottom,
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},
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});
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}, this);
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},
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addElementAndReset: function(index) {
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this.getDataset().metaData = this.getDataset().metaData || [];
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var point = new Chart.elements.Point({
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_chart: this.chart.chart,
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_datasetIndex: this.index,
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_index: index,
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});
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// Reset the point
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this.updateElement(point, index, true);
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// Add to the points array
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this.getDataset().metaData.splice(index, 0, point);
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// Make sure bezier control points are updated
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this.updateBezierControlPoints();
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},
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removeElement: function(index) {
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this.getDataset().metaData.splice(index, 1);
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},
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reset: function() {
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this.update(true);
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},
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buildOrUpdateElements: function buildOrUpdateElements() {
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// Handle the number of data points changing
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var numData = this.getDataset().data.length;
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var numPoints = this.getDataset().metaData.length;
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// Make sure that we handle number of datapoints changing
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if (numData < numPoints) {
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// Remove excess bars for data points that have been removed
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this.getDataset().metaData.splice(numData, numPoints - numData);
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} else if (numData > numPoints) {
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// Add new elements
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for (var index = numPoints; index < numData; ++index) {
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this.addElementAndReset(index);
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}
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}
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},
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update: function update(reset) {
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var line = this.getDataset().metaDataset;
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var points = this.getDataset().metaData;
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var scale = this.chart.scale;
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var scaleBase;
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if (scale.min < 0 && scale.max < 0) {
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scaleBase = scale.getPointPositionForValue(0, scale.max);
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} else if (scale.min > 0 && scale.max > 0) {
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scaleBase = scale.getPointPositionForValue(0, scale.min);
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} else {
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scaleBase = scale.getPointPositionForValue(0, 0);
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}
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helpers.extend(this.getDataset().metaDataset, {
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// Utility
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_datasetIndex: this.index,
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// Data
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_children: this.getDataset().metaData,
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// Model
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_model: {
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// Appearance
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tension: helpers.getValueOrDefault(this.getDataset().tension, this.chart.options.elements.line.tension),
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backgroundColor: this.getDataset().backgroundColor || this.chart.options.elements.line.backgroundColor,
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borderWidth: this.getDataset().borderWidth || this.chart.options.elements.line.borderWidth,
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borderColor: this.getDataset().borderColor || this.chart.options.elements.line.borderColor,
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fill: this.getDataset().fill !== undefined ? this.getDataset().fill : this.chart.options.elements.line.fill, // use the value from the this.getDataset() if it was provided. else fall back to the default
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// Scale
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scaleTop: scale.top,
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scaleBottom: scale.bottom,
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scaleZero: scaleBase,
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},
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});
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this.getDataset().metaDataset.pivot();
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// Update Points
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helpers.each(points, function(point, index) {
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this.updateElement(point, index, reset);
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}, this);
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// Update bezier control points
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this.updateBezierControlPoints();
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},
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updateElement: function(point, index, reset) {
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var pointPosition = this.chart.scale.getPointPositionForValue(index, this.getDataset().data[index]);
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helpers.extend(point, {
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// Utility
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_datasetIndex: this.index,
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_index: index,
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_scale: this.chart.scale,
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// Desired view properties
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_model: {
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x: reset ? this.chart.scale.xCenter : pointPosition.x, // value not used in dataset scale, but we want a consistent API between scales
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y: reset ? this.chart.scale.yCenter : pointPosition.y,
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// Appearance
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tension: point.custom && point.custom.tension ? point.custom.tension : helpers.getValueOrDefault(this.getDataset().tension, this.chart.options.elements.line.tension),
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radius: point.custom && point.custom.radius ? point.custom.pointRadius : helpers.getValueAtIndexOrDefault(this.getDataset().pointRadius, index, this.chart.options.elements.point.radius),
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backgroundColor: point.custom && point.custom.backgroundColor ? point.custom.backgroundColor : helpers.getValueAtIndexOrDefault(this.getDataset().pointBackgroundColor, index, this.chart.options.elements.point.backgroundColor),
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borderColor: point.custom && point.custom.borderColor ? point.custom.borderColor : helpers.getValueAtIndexOrDefault(this.getDataset().pointBorderColor, index, this.chart.options.elements.point.borderColor),
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borderWidth: point.custom && point.custom.borderWidth ? point.custom.borderWidth : helpers.getValueAtIndexOrDefault(this.getDataset().pointBorderWidth, index, this.chart.options.elements.point.borderWidth),
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// Tooltip
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hitRadius: point.custom && point.custom.hitRadius ? point.custom.hitRadius : helpers.getValueAtIndexOrDefault(this.getDataset().hitRadius, index, this.chart.options.elements.point.hitRadius),
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},
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});
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point._model.skip = point.custom && point.custom.skip ? point.custom.skip : (isNaN(point._model.x) || isNaN(point._model.y));
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},
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updateBezierControlPoints: function() {
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helpers.each(this.getDataset().metaData, function(point, index) {
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var controlPoints = helpers.splineCurve(
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helpers.previousItem(this.getDataset().metaData, index, true)._model,
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point._model,
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helpers.nextItem(this.getDataset().metaData, index, true)._model,
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point._model.tension
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);
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// Prevent the bezier going outside of the bounds of the graph
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point._model.controlPointPreviousX = Math.max(Math.min(controlPoints.previous.x, this.chart.chartArea.right), this.chart.chartArea.left);
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point._model.controlPointPreviousY = Math.max(Math.min(controlPoints.previous.y, this.chart.chartArea.bottom), this.chart.chartArea.top);
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point._model.controlPointNextX = Math.max(Math.min(controlPoints.next.x, this.chart.chartArea.right), this.chart.chartArea.left);
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point._model.controlPointNextY = Math.max(Math.min(controlPoints.next.y, this.chart.chartArea.bottom), this.chart.chartArea.top);
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// Now pivot the point for animation
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point.pivot();
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}, this);
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},
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draw: function(ease) {
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var easingDecimal = ease || 1;
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// Transition Point Locations
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helpers.each(this.getDataset().metaData, function(point, index) {
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point.transition(easingDecimal);
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}, this);
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// Transition and Draw the line
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this.getDataset().metaDataset.transition(easingDecimal).draw();
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// Draw the points
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helpers.each(this.getDataset().metaData, function(point) {
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point.draw();
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});
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},
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setHoverStyle: function(point) {
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// Point
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var dataset = this.chart.data.datasets[point._datasetIndex];
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var index = point._index;
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point._model.radius = point.custom && point.custom.radius ? point.custom.radius : helpers.getValueAtIndexOrDefault(dataset.pointHoverRadius, index, this.chart.options.elements.point.hoverRadius);
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point._model.backgroundColor = point.custom && point.custom.hoverBackgroundColor ? point.custom.hoverBackgroundColor : helpers.getValueAtIndexOrDefault(dataset.pointHoverBackgroundColor, index, helpers.color(point._model.backgroundColor).saturate(0.5).darken(0.1).rgbString());
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point._model.borderColor = point.custom && point.custom.hoverBorderColor ? point.custom.hoverBorderColor : helpers.getValueAtIndexOrDefault(dataset.pointHoverBorderColor, index, helpers.color(point._model.borderColor).saturate(0.5).darken(0.1).rgbString());
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point._model.borderWidth = point.custom && point.custom.hoverBorderWidth ? point.custom.hoverBorderWidth : helpers.getValueAtIndexOrDefault(dataset.pointBorderWidth, index, point._model.borderWidth);
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},
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removeHoverStyle: function(point) {
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var dataset = this.chart.data.datasets[point._datasetIndex];
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var index = point._index;
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point._model.radius = point.custom && point.custom.radius ? point.custom.radius : helpers.getValueAtIndexOrDefault(this.getDataset().radius, index, this.chart.options.elements.point.radius);
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point._model.backgroundColor = point.custom && point.custom.backgroundColor ? point.custom.backgroundColor : helpers.getValueAtIndexOrDefault(this.getDataset().pointBackgroundColor, index, this.chart.options.elements.point.backgroundColor);
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point._model.borderColor = point.custom && point.custom.borderColor ? point.custom.borderColor : helpers.getValueAtIndexOrDefault(this.getDataset().pointBorderColor, index, this.chart.options.elements.point.borderColor);
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point._model.borderWidth = point.custom && point.custom.borderWidth ? point.custom.borderWidth : helpers.getValueAtIndexOrDefault(this.getDataset().pointBorderWidth, index, this.chart.options.elements.point.borderWidth);
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}
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});
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}).call(this);
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