%PDF-
%PDF-
Mini Shell
Mini Shell
'use strict';
var DatasetController = require('../core/core.datasetController');
var defaults = require('../core/core.defaults');
var elements = require('../elements/index');
var helpers = require('../helpers/index');
var valueOrDefault = helpers.valueOrDefault;
var PI = Math.PI;
var DOUBLE_PI = PI * 2;
var HALF_PI = PI / 2;
defaults._set('doughnut', {
animation: {
// Boolean - Whether we animate the rotation of the Doughnut
animateRotate: true,
// Boolean - Whether we animate scaling the Doughnut from the centre
animateScale: false
},
hover: {
mode: 'single'
},
legendCallback: function(chart) {
var list = document.createElement('ul');
var data = chart.data;
var datasets = data.datasets;
var labels = data.labels;
var i, ilen, listItem, listItemSpan;
list.setAttribute('class', chart.id + '-legend');
if (datasets.length) {
for (i = 0, ilen = datasets[0].data.length; i < ilen; ++i) {
listItem = list.appendChild(document.createElement('li'));
listItemSpan = listItem.appendChild(document.createElement('span'));
listItemSpan.style.backgroundColor = datasets[0].backgroundColor[i];
if (labels[i]) {
listItem.appendChild(document.createTextNode(labels[i]));
}
}
}
return list.outerHTML;
},
legend: {
labels: {
generateLabels: function(chart) {
var data = chart.data;
if (data.labels.length && data.datasets.length) {
return data.labels.map(function(label, i) {
var meta = chart.getDatasetMeta(0);
var style = meta.controller.getStyle(i);
return {
text: label,
fillStyle: style.backgroundColor,
strokeStyle: style.borderColor,
lineWidth: style.borderWidth,
hidden: isNaN(data.datasets[0].data[i]) || meta.data[i].hidden,
// Extra data used for toggling the correct item
index: i
};
});
}
return [];
}
},
onClick: function(e, legendItem) {
var index = legendItem.index;
var chart = this.chart;
var i, ilen, meta;
for (i = 0, ilen = (chart.data.datasets || []).length; i < ilen; ++i) {
meta = chart.getDatasetMeta(i);
// toggle visibility of index if exists
if (meta.data[index]) {
meta.data[index].hidden = !meta.data[index].hidden;
}
}
chart.update();
}
},
// The percentage of the chart that we cut out of the middle.
cutoutPercentage: 50,
// The rotation of the chart, where the first data arc begins.
rotation: -HALF_PI,
// The total circumference of the chart.
circumference: DOUBLE_PI,
// Need to override these to give a nice default
tooltips: {
callbacks: {
title: function() {
return '';
},
label: function(tooltipItem, data) {
var dataLabel = data.labels[tooltipItem.index];
var value = ': ' + data.datasets[tooltipItem.datasetIndex].data[tooltipItem.index];
if (helpers.isArray(dataLabel)) {
// show value on first line of multiline label
// need to clone because we are changing the value
dataLabel = dataLabel.slice();
dataLabel[0] += value;
} else {
dataLabel += value;
}
return dataLabel;
}
}
}
});
module.exports = DatasetController.extend({
dataElementType: elements.Arc,
linkScales: helpers.noop,
/**
* @private
*/
_dataElementOptions: [
'backgroundColor',
'borderColor',
'borderWidth',
'borderAlign',
'hoverBackgroundColor',
'hoverBorderColor',
'hoverBorderWidth',
],
// Get index of the dataset in relation to the visible datasets. This allows determining the inner and outer radius correctly
getRingIndex: function(datasetIndex) {
var ringIndex = 0;
for (var j = 0; j < datasetIndex; ++j) {
if (this.chart.isDatasetVisible(j)) {
++ringIndex;
}
}
return ringIndex;
},
update: function(reset) {
var me = this;
var chart = me.chart;
var chartArea = chart.chartArea;
var opts = chart.options;
var ratioX = 1;
var ratioY = 1;
var offsetX = 0;
var offsetY = 0;
var meta = me.getMeta();
var arcs = meta.data;
var cutout = opts.cutoutPercentage / 100 || 0;
var circumference = opts.circumference;
var chartWeight = me._getRingWeight(me.index);
var maxWidth, maxHeight, i, ilen;
// If the chart's circumference isn't a full circle, calculate size as a ratio of the width/height of the arc
if (circumference < DOUBLE_PI) {
var startAngle = opts.rotation % DOUBLE_PI;
startAngle += startAngle >= PI ? -DOUBLE_PI : startAngle < -PI ? DOUBLE_PI : 0;
var endAngle = startAngle + circumference;
var startX = Math.cos(startAngle);
var startY = Math.sin(startAngle);
var endX = Math.cos(endAngle);
var endY = Math.sin(endAngle);
var contains0 = (startAngle <= 0 && endAngle >= 0) || endAngle >= DOUBLE_PI;
var contains90 = (startAngle <= HALF_PI && endAngle >= HALF_PI) || endAngle >= DOUBLE_PI + HALF_PI;
var contains180 = startAngle === -PI || endAngle >= PI;
var contains270 = (startAngle <= -HALF_PI && endAngle >= -HALF_PI) || endAngle >= PI + HALF_PI;
var minX = contains180 ? -1 : Math.min(startX, startX * cutout, endX, endX * cutout);
var minY = contains270 ? -1 : Math.min(startY, startY * cutout, endY, endY * cutout);
var maxX = contains0 ? 1 : Math.max(startX, startX * cutout, endX, endX * cutout);
var maxY = contains90 ? 1 : Math.max(startY, startY * cutout, endY, endY * cutout);
ratioX = (maxX - minX) / 2;
ratioY = (maxY - minY) / 2;
offsetX = -(maxX + minX) / 2;
offsetY = -(maxY + minY) / 2;
}
for (i = 0, ilen = arcs.length; i < ilen; ++i) {
arcs[i]._options = me._resolveDataElementOptions(arcs[i], i);
}
chart.borderWidth = me.getMaxBorderWidth();
maxWidth = (chartArea.right - chartArea.left - chart.borderWidth) / ratioX;
maxHeight = (chartArea.bottom - chartArea.top - chart.borderWidth) / ratioY;
chart.outerRadius = Math.max(Math.min(maxWidth, maxHeight) / 2, 0);
chart.innerRadius = Math.max(chart.outerRadius * cutout, 0);
chart.radiusLength = (chart.outerRadius - chart.innerRadius) / (me._getVisibleDatasetWeightTotal() || 1);
chart.offsetX = offsetX * chart.outerRadius;
chart.offsetY = offsetY * chart.outerRadius;
meta.total = me.calculateTotal();
me.outerRadius = chart.outerRadius - chart.radiusLength * me._getRingWeightOffset(me.index);
me.innerRadius = Math.max(me.outerRadius - chart.radiusLength * chartWeight, 0);
for (i = 0, ilen = arcs.length; i < ilen; ++i) {
me.updateElement(arcs[i], i, reset);
}
},
updateElement: function(arc, index, reset) {
var me = this;
var chart = me.chart;
var chartArea = chart.chartArea;
var opts = chart.options;
var animationOpts = opts.animation;
var centerX = (chartArea.left + chartArea.right) / 2;
var centerY = (chartArea.top + chartArea.bottom) / 2;
var startAngle = opts.rotation; // non reset case handled later
var endAngle = opts.rotation; // non reset case handled later
var dataset = me.getDataset();
var circumference = reset && animationOpts.animateRotate ? 0 : arc.hidden ? 0 : me.calculateCircumference(dataset.data[index]) * (opts.circumference / DOUBLE_PI);
var innerRadius = reset && animationOpts.animateScale ? 0 : me.innerRadius;
var outerRadius = reset && animationOpts.animateScale ? 0 : me.outerRadius;
var options = arc._options || {};
helpers.extend(arc, {
// Utility
_datasetIndex: me.index,
_index: index,
// Desired view properties
_model: {
backgroundColor: options.backgroundColor,
borderColor: options.borderColor,
borderWidth: options.borderWidth,
borderAlign: options.borderAlign,
x: centerX + chart.offsetX,
y: centerY + chart.offsetY,
startAngle: startAngle,
endAngle: endAngle,
circumference: circumference,
outerRadius: outerRadius,
innerRadius: innerRadius,
label: helpers.valueAtIndexOrDefault(dataset.label, index, chart.data.labels[index])
}
});
var model = arc._model;
// Set correct angles if not resetting
if (!reset || !animationOpts.animateRotate) {
if (index === 0) {
model.startAngle = opts.rotation;
} else {
model.startAngle = me.getMeta().data[index - 1]._model.endAngle;
}
model.endAngle = model.startAngle + model.circumference;
}
arc.pivot();
},
calculateTotal: function() {
var dataset = this.getDataset();
var meta = this.getMeta();
var total = 0;
var value;
helpers.each(meta.data, function(element, index) {
value = dataset.data[index];
if (!isNaN(value) && !element.hidden) {
total += Math.abs(value);
}
});
/* if (total === 0) {
total = NaN;
}*/
return total;
},
calculateCircumference: function(value) {
var total = this.getMeta().total;
if (total > 0 && !isNaN(value)) {
return DOUBLE_PI * (Math.abs(value) / total);
}
return 0;
},
// gets the max border or hover width to properly scale pie charts
getMaxBorderWidth: function(arcs) {
var me = this;
var max = 0;
var chart = me.chart;
var i, ilen, meta, arc, controller, options, borderWidth, hoverWidth;
if (!arcs) {
// Find the outmost visible dataset
for (i = 0, ilen = chart.data.datasets.length; i < ilen; ++i) {
if (chart.isDatasetVisible(i)) {
meta = chart.getDatasetMeta(i);
arcs = meta.data;
if (i !== me.index) {
controller = meta.controller;
}
break;
}
}
}
if (!arcs) {
return 0;
}
for (i = 0, ilen = arcs.length; i < ilen; ++i) {
arc = arcs[i];
if (controller) {
controller._configure();
options = controller._resolveDataElementOptions(arc, i);
} else {
options = arc._options;
}
if (options.borderAlign !== 'inner') {
borderWidth = options.borderWidth;
hoverWidth = options.hoverBorderWidth;
max = borderWidth > max ? borderWidth : max;
max = hoverWidth > max ? hoverWidth : max;
}
}
return max;
},
/**
* @protected
*/
setHoverStyle: function(arc) {
var model = arc._model;
var options = arc._options;
var getHoverColor = helpers.getHoverColor;
arc.$previousStyle = {
backgroundColor: model.backgroundColor,
borderColor: model.borderColor,
borderWidth: model.borderWidth,
};
model.backgroundColor = valueOrDefault(options.hoverBackgroundColor, getHoverColor(options.backgroundColor));
model.borderColor = valueOrDefault(options.hoverBorderColor, getHoverColor(options.borderColor));
model.borderWidth = valueOrDefault(options.hoverBorderWidth, options.borderWidth);
},
/**
* Get radius length offset of the dataset in relation to the visible datasets weights. This allows determining the inner and outer radius correctly
* @private
*/
_getRingWeightOffset: function(datasetIndex) {
var ringWeightOffset = 0;
for (var i = 0; i < datasetIndex; ++i) {
if (this.chart.isDatasetVisible(i)) {
ringWeightOffset += this._getRingWeight(i);
}
}
return ringWeightOffset;
},
/**
* @private
*/
_getRingWeight: function(dataSetIndex) {
return Math.max(valueOrDefault(this.chart.data.datasets[dataSetIndex].weight, 1), 0);
},
/**
* Returns the sum of all visibile data set weights. This value can be 0.
* @private
*/
_getVisibleDatasetWeightTotal: function() {
return this._getRingWeightOffset(this.chart.data.datasets.length);
}
});
Zerion Mini Shell 1.0