48 lines
1.5 KiB
JavaScript
Executable File
48 lines
1.5 KiB
JavaScript
Executable File
"use strict";
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module.exports = function(Chart) {
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var helpers = Chart.helpers;
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// Default config for a category scale
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var defaultConfig = {
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position: "bottom"
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};
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var DatasetScale = Chart.Scale.extend({
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buildTicks: function(index) {
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this.ticks = this.chart.data.labels;
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},
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getLabelForIndex: function(index, datasetIndex) {
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return this.ticks[index];
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},
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// Used to get data value locations. Value can either be an index or a numerical value
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getPixelForValue: function(value, index, datasetIndex, includeOffset) {
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if (this.isHorizontal()) {
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var innerWidth = this.width - (this.paddingLeft + this.paddingRight);
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var valueWidth = innerWidth / Math.max((this.chart.data.labels.length - ((this.options.gridLines.offsetGridLines) ? 0 : 1)), 1);
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var widthOffset = (valueWidth * index) + this.paddingLeft;
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if (this.options.gridLines.offsetGridLines && includeOffset) {
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widthOffset += (valueWidth / 2);
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}
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return this.left + Math.round(widthOffset);
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} else {
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var innerHeight = this.height - (this.paddingTop + this.paddingBottom);
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var valueHeight = innerHeight / Math.max((this.chart.data.labels.length - ((this.options.gridLines.offsetGridLines) ? 0 : 1)), 1);
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var heightOffset = (valueHeight * index) + this.paddingTop;
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if (this.options.gridLines.offsetGridLines && includeOffset) {
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heightOffset += (valueHeight / 2);
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}
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return this.top + Math.round(heightOffset);
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}
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}
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});
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Chart.scaleService.registerScaleType("category", DatasetScale, defaultConfig);
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}; |