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core.scaleService.js
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core.scaleService.js
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'use strict';
module.exports = function(Chart) {
var helpers = Chart.helpers;
Chart.scaleService = {
// Scale registration object. Extensions can register new scale types (such as log or DB scales) and then
// use the new chart options to grab the correct scale
constructors: {},
// Use a registration function so that we can move to an ES6 map when we no longer need to support
// old browsers
// Scale config defaults
defaults: {},
registerScaleType: function(type, scaleConstructor, defaults) {
this.constructors[type] = scaleConstructor;
this.defaults[type] = helpers.clone(defaults);
},
getScaleConstructor: function(type) {
return this.constructors.hasOwnProperty(type) ? this.constructors[type] : undefined;
},
getScaleDefaults: function(type) {
// Return the scale defaults merged with the global settings so that we always use the latest ones
return this.defaults.hasOwnProperty(type) ? helpers.scaleMerge(Chart.defaults.scale, this.defaults[type]) : {};
},
updateScaleDefaults: function(type, additions) {
var defaults = this.defaults;
if (defaults.hasOwnProperty(type)) {
defaults[type] = helpers.extend(defaults[type], additions);
}
},
addScalesToLayout: function(chart) {
// Adds each scale to the chart.boxes array to be sized accordingly
helpers.each(chart.scales, function(scale) {
// Set ILayoutItem parameters for backwards compatibility
scale.fullWidth = scale.options.fullWidth;
scale.position = scale.options.position;
Chart.layoutService.addBox(chart, scale);
});
}
};
};