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polarCreator.js 4.2KB

    var _config = require("../../config"); var __DEV__ = _config.__DEV__; var zrUtil = require("zrender/lib/core/util"); var Polar = require("./Polar"); var _number = require("../../util/number"); var parsePercent = _number.parsePercent; var _axisHelper = require("../../coord/axisHelper"); var createScaleByModel = _axisHelper.createScaleByModel; var niceScaleExtent = _axisHelper.niceScaleExtent; var CoordinateSystem = require("../../CoordinateSystem"); require("./PolarModel"); // TODO Axis scale // 依赖 PolarModel 做预处理 /** * Resize method bound to the polar * @param {module:echarts/coord/polar/PolarModel} polarModel * @param {module:echarts/ExtensionAPI} api */ function resizePolar(polar, polarModel, api) { var center = polarModel.get('center'); var width = api.getWidth(); var height = api.getHeight(); polar.cx = parsePercent(center[0], width); polar.cy = parsePercent(center[1], height); var radiusAxis = polar.getRadiusAxis(); var size = Math.min(width, height) / 2; var radius = parsePercent(polarModel.get('radius'), size); radiusAxis.inverse ? radiusAxis.setExtent(radius, 0) : radiusAxis.setExtent(0, radius); } /** * Update polar */ function updatePolarScale(ecModel, api) { var polar = this; var angleAxis = polar.getAngleAxis(); var radiusAxis = polar.getRadiusAxis(); // Reset scale angleAxis.scale.setExtent(Infinity, -Infinity); radiusAxis.scale.setExtent(Infinity, -Infinity); ecModel.eachSeries(function (seriesModel) { if (seriesModel.coordinateSystem === polar) { var data = seriesModel.getData(); zrUtil.each(data.mapDimension('radius', true), function (dim) { radiusAxis.scale.unionExtentFromData(data, dim); }); zrUtil.each(data.mapDimension('angle', true), function (dim) { angleAxis.scale.unionExtentFromData(data, dim); }); } }); niceScaleExtent(angleAxis.scale, angleAxis.model); niceScaleExtent(radiusAxis.scale, radiusAxis.model); // Fix extent of category angle axis if (angleAxis.type === 'category' && !angleAxis.onBand) { var extent = angleAxis.getExtent(); var diff = 360 / angleAxis.scale.count(); angleAxis.inverse ? extent[1] += diff : extent[1] -= diff; angleAxis.setExtent(extent[0], extent[1]); } } /** * Set common axis properties * @param {module:echarts/coord/polar/AngleAxis|module:echarts/coord/polar/RadiusAxis} * @param {module:echarts/coord/polar/AxisModel} * @inner */ function setAxis(axis, axisModel) { axis.type = axisModel.get('type'); axis.scale = createScaleByModel(axisModel); axis.onBand = axisModel.get('boundaryGap') && axis.type === 'category'; axis.inverse = axisModel.get('inverse'); if (axisModel.mainType === 'angleAxis') { axis.inverse ^= axisModel.get('clockwise'); var startAngle = axisModel.get('startAngle'); axis.setExtent(startAngle, startAngle + (axis.inverse ? -360 : 360)); } // Inject axis instance axisModel.axis = axis; axis.model = axisModel; } var polarCreator = { dimensions: Polar.prototype.dimensions, create: function (ecModel, api) { var polarList = []; ecModel.eachComponent('polar', function (polarModel, idx) { var polar = new Polar(idx); // Inject resize and update method polar.update = updatePolarScale; var radiusAxis = polar.getRadiusAxis(); var angleAxis = polar.getAngleAxis(); var radiusAxisModel = polarModel.findAxisModel('radiusAxis'); var angleAxisModel = polarModel.findAxisModel('angleAxis'); setAxis(radiusAxis, radiusAxisModel); setAxis(angleAxis, angleAxisModel); resizePolar(polar, polarModel, api); polarList.push(polar); polarModel.coordinateSystem = polar; polar.model = polarModel; }); // Inject coordinateSystem to series ecModel.eachSeries(function (seriesModel) { if (seriesModel.get('coordinateSystem') === 'polar') { var polarModel = ecModel.queryComponents({ mainType: 'polar', index: seriesModel.get('polarIndex'), id: seriesModel.get('polarId') })[0]; seriesModel.coordinateSystem = polarModel.coordinateSystem; } }); return polarList; } }; CoordinateSystem.register('polar', polarCreator);