/** * @abstract * @class Ext.chart.axis.layout.Layout * * Interface used by Axis to process its data into a meaningful layout. */Ext.define('Ext.chart.axis.layout.Layout', { mixins: { observable: 'Ext.mixin.Observable' }, config: { /** * @cfg {Ext.chart.axis.Axis} axis The axis that the Layout is bound. */ axis: null }, constructor: function (config) { this.mixins.observable.constructor.call(this, config); }, /** * Processes the data of the series bound to the axis. * @param {Ext.chart.series.Series} series The bound series. */ processData: function (series) { var me = this, axis = me.getAxis(), direction = axis.getDirection(), boundSeries = axis.boundSeries, i, ln; if (series) { series['coordinate' + direction](); } else { for (i = 0, ln = boundSeries.length; i < ln; i++) { boundSeries[i]['coordinate' + direction]() } } }, /** * Calculates the position of major ticks for the axis. * @param {Object} context */ calculateMajorTicks: function (context) { var me = this, attr = context.attr, range = attr.max - attr.min, zoom = range / Math.max(1, attr.length) * (attr.visibleMax - attr.visibleMin), viewMin = attr.min + range * attr.visibleMin, viewMax = attr.min + range * attr.visibleMax, estStepSize = attr.estStepSize * zoom, out = me.snapEnds(context, attr.min, attr.max, estStepSize); if (out) { me.trimByRange(context, out, viewMin, viewMax); context.majorTicks = out; } }, /** * Calculates the position of sub ticks for the axis. * @param {Object} context */ calculateMinorTicks: function (context) { if (this.snapMinorEnds) { context.minorTicks = this.snapMinorEnds(context); } }, /** * Calculates the position of tick marks for the axis. * @param {Object} context * @return {*} */ calculateLayout: function (context) { var me = this, attr = context.attr; if (attr.length === 0) { return null; } if (attr.majorTicks) { me.calculateMajorTicks(context); if (attr.minorTicks) { me.calculateMinorTicks(context); } } }, /** * @method * Snaps the data bound to the axis to meaningful tick marks. * @param {Object} context * @param {Number} min * @param {Number} max * @param {Number} estStepSize */ snapEnds: Ext.emptyFn, /** * Trims the layout of the axis by the defined minimum and maximum. * @param {Object} context * @param {Object} out * @param {Number} trimMin * @param {Number} trimMax */ trimByRange: function (context, out, trimMin, trimMax) { var segmenter = context.segmenter, unit = out.unit, beginIdx = segmenter.diff(out.from, trimMin, unit), endIdx = segmenter.diff(out.from, trimMax, unit), begin = Math.max(0, Math.ceil(beginIdx / out.step)), end = Math.min(out.steps, Math.floor(endIdx / out.step)); if (end < out.steps) { out.to = segmenter.add(out.from, end * out.step, unit); } if (out.max > trimMax) { out.max = out.to; } if (out.from < trimMin) { out.from = segmenter.add(out.from, begin * out.step, unit); while (out.from < trimMin) { begin++; out.from = segmenter.add(out.from, out.step, unit); } } if (out.min < trimMin) { out.min = out.from; } out.steps = end - begin; }});