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Reset elements for donut charts

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This commit is contained in:
Evert Timberg 2015-06-03 19:16:42 -04:00
parent b93306788b
commit a6c712323f
1 changed files with 43 additions and 1 deletions
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44
src/Chart.Doughnut.js
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@ -54,6 +54,8 @@
_options: this.options, _options: this.options,
}, this); }, this);
this.resetElements();
// Update the chart with the latest data. // Update the chart with the latest data.
this.update(); this.update();
@ -66,6 +68,46 @@
return 0; return 0;
} }
}, },
resetElements: function() {
this.outerRadius = (helpers.min([this.chart.width, this.chart.height]) - this.options.elements.slice.borderWidth / 2) / 2;
this.innerRadius = this.options.cutoutPercentage ? (this.outerRadius / 100) * (this.options.cutoutPercentage) : 1;
this.radiusLength = (this.outerRadius - this.innerRadius) / this.data.datasets.length;
// Update the points
helpers.each(this.data.datasets, function(dataset, datasetIndex) {
// So that calculateCircumference works
dataset.total = 0;
helpers.each(dataset.data, function(value) {
dataset.total += Math.abs(value);
}, this);
dataset.outerRadius = this.outerRadius - (this.radiusLength * datasetIndex);
dataset.innerRadius = dataset.outerRadius - this.radiusLength;
helpers.each(dataset.metaData, function(slice, index) {
helpers.extend(slice, {
_model: {
x: this.chart.width / 2,
y: this.chart.height / 2,
startAngle: Math.PI * -0.5, // use - PI / 2 instead of 3PI / 2 to make animations better. It means that we never deal with overflow during the transition function
circumference: (this.options.animation.animateRotate) ? 0 : this.calculateCircumference(metaSlice.value),
outerRadius: (this.options.animation.animateScale) ? 0 : dataset.outerRadius,
innerRadius: (this.options.animation.animateScale) ? 0 : dataset.innerRadius,
backgroundColor: slice.custom && slice.custom.backgroundColor ? slice.custom.backgroundColor : helpers.getValueAtIndexOrDefault(dataset.backgroundColor, index, this.options.elements.slice.backgroundColor),
hoverBackgroundColor: slice.custom && slice.custom.hoverBackgroundColor ? slice.custom.hoverBackgroundColor : helpers.getValueAtIndexOrDefault(dataset.hoverBackgroundColor, index, this.options.elements.slice.hoverBackgroundColor),
borderWidth: slice.custom && slice.custom.borderWidth ? slice.custom.borderWidth : helpers.getValueAtIndexOrDefault(dataset.borderWidth, index, this.options.elements.slice.borderWidth),
borderColor: slice.custom && slice.custom.borderColor ? slice.custom.borderColor : helpers.getValueAtIndexOrDefault(dataset.borderColor, index, this.options.elements.slice.borderColor),
label: helpers.getValueAtIndexOrDefault(dataset.label, index, this.data.labels[index])
},
});
slice.pivot();
}, this);
}, this);
},
update: function() { update: function() {
this.outerRadius = (helpers.min([this.chart.width, this.chart.height]) - this.options.elements.slice.borderWidth / 2) / 2; this.outerRadius = (helpers.min([this.chart.width, this.chart.height]) - this.options.elements.slice.borderWidth / 2) / 2;
@ -112,7 +154,7 @@
}); });
if (index === 0) { if (index === 0) {
slice._model.startAngle = Math.PI * 1.5; slice._model.startAngle = Math.PI * -0.5; // use - PI / 2 instead of 3PI / 2 to make animations better. It means that we never deal with overflow during the transition function
} else { } else {
slice._model.startAngle = dataset.metaData[index - 1]._model.endAngle; slice._model.startAngle = dataset.metaData[index - 1]._model.endAngle;
} }