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{ each, head, isEqual, last, get, flatten, isArray, uniq, isNil } from '@antv/util';\nimport { View } from 'src/chart';\nimport { findItemsFromViewRecurisive } from '../../util/tooltip';\nimport { IShape, Point, ShapeAttrs } from '../../dependents';\nimport Element from '../../geometry/element';\nimport { LooseObject, TooltipCfg } from '../../interface';\nimport { getAngle, getSectorPath } from '../../util/graphics';\nimport Action from './base';\n\nconst DEFAULT_REGION_PATH_STYLE = {\n fill: '#CCD6EC',\n opacity: 0.3,\n};\n\nexport function getItemsOfView(view: View, point: Point, tooltipCfg: TooltipCfg) {\n let items = findItemsFromViewRecurisive(view, point, tooltipCfg);\n if (items.length) {\n // 三层\n items = flatten(items);\n for (const itemArr of items) {\n for (const item of itemArr) {\n const { x, y } = item.mappingData;\n item.x = isArray(x) ? x[x.length - 1] : x;\n item.y = isArray(y) ? y[y.length - 1] : y;\n }\n }\n\n const { shared } = tooltipCfg;\n // shared: false 代表只显示当前拾取到的 shape 的数据，但是一个 view 会有多个 Geometry，所以有可能会拾取到多个 shape\n if (shared === false && items.length > 1) {\n let snapItem = items[0];\n let min = Math.abs(point.y - snapItem[0].y);\n for (const aItem of items) {\n const yDistance = Math.abs(point.y - aItem[0].y);\n if (yDistance <= min) {\n snapItem = aItem;\n min = yDistance;\n }\n }\n items = [snapItem];\n }\n\n return uniq(flatten(items));\n }\n\n return [];\n}\n\n/**\n * 背景框的 Action. 只作用于 interval 和 schema geometry\n * @ignore\n */\nclass ActiveRegion extends Action {\n private items: any[];\n private regionPath: IShape;\n /**\n * 显示\n * @param {ShapeAttrs} style region-path 的样式\n * @param {number} appendRatio 适用于笛卡尔坐标系. 对于 x 轴非 linear 类型: 默认：0.25, x 轴 linear 类型: 默认 0\n * @param {number} appendWidth 适用于笛卡尔坐标系. 像素级别，优先级 > appendRatio\n */\n public show(args?: { style: ShapeAttrs; appendRatio?: number; appendWidth?: number }) {\n const view = this.context.view;\n const ev = this.context.event;\n\n const tooltipCfg = view.getController('tooltip').getTooltipCfg();\n const tooltipItems = getItemsOfView(\n view,\n {\n x: ev.x,\n y: ev.y,\n },\n tooltipCfg\n );\n\n if (isEqual(tooltipItems, this.items)) {\n // 如果拾取数据同上次相同，则不重复绘制\n return;\n }\n this.items = tooltipItems;\n if (tooltipItems.length) {\n const xField = view.getXScale().field;\n const xValue = tooltipItems[0].data[xField];\n // 根据 x 对应的值查找 elements\n let elements: Element[] = [];\n const geometries = view.geometries;\n each(geometries, (geometry) => {\n if (geometry.type === 'interval' || geometry.type === 'schema') {\n const result = geometry.getElementsBy((ele) => {\n const eleData = ele.getData();\n return eleData[xField] === xValue;\n });\n\n elements = elements.concat(result);\n }\n });\n\n // 根据 bbox 计算背景框的面积区域\n if (elements.length) {\n const coordinate = view.getCoordinate();\n\n let firstBBox = elements[0].shape.getCanvasBBox();\n let lastBBox = elements[0].shape.getCanvasBBox();\n const groupBBox: LooseObject = firstBBox;\n\n each(elements, (ele: Element) => {\n const bbox = ele.shape.getCanvasBBox();\n if (coordinate.isTransposed) {\n if (bbox.minY < firstBBox.minY) {\n firstBBox = bbox;\n }\n if (bbox.maxY > lastBBox.maxY) {\n lastBBox = bbox;\n }\n } else {\n if (bbox.minX < firstBBox.minX) {\n firstBBox = bbox;\n }\n if (bbox.maxX > lastBBox.maxX) {\n lastBBox = bbox;\n }\n }\n\n groupBBox.x = Math.min(bbox.minX, groupBBox.minX);\n groupBBox.y = Math.min(bbox.minY, groupBBox.minY);\n groupBBox.width = Math.max(bbox.maxX, groupBBox.maxX) - groupBBox.x;\n groupBBox.height = Math.max(bbox.maxY, groupBBox.maxY) - groupBBox.y;\n });\n\n const { backgroundGroup, coordinateBBox } = view;\n let path;\n if (coordinate.isRect) {\n const xScale = view.getXScale();\n\n let { appendRatio, appendWidth } = args || {};\n if (isNil(appendWidth)) {\n appendRatio = isNil(appendRatio) ? (xScale.isLinear ? 0 : 0.25) : appendRatio; // 如果 x 轴是数值类型，如直方图，默认不需要加额外的宽度\n appendWidth = coordinate.isTransposed ? appendRatio * lastBBox.height : appendRatio * firstBBox.width;\n }\n\n let minX: number;\n let minY: number;\n let width: number;\n let height: number;\n if (coordinate.isTransposed) {\n minX = coordinateBBox.minX;\n minY = Math.min(lastBBox.minY, firstBBox.minY) - appendWidth;\n width = coordinateBBox.width;\n height = groupBBox.height + appendWidth * 2;\n } else {\n minX = Math.min(firstBBox.minX, lastBBox.minX) - appendWidth;\n // 直角坐标系 非转置：最小值直接取 坐标系 minY\n minY = coordinateBBox.minY;\n width = groupBBox.width + appendWidth * 2;\n height = coordinateBBox.height;\n }\n\n path = [\n ['M', minX, minY],\n ['L', minX + width, minY],\n ['L', minX + width, minY + height],\n ['L', minX, minY + height],\n ['Z'],\n ];\n } else {\n const firstElement = head(elements);\n const lastElement = last(elements);\n const { startAngle } = getAngle(firstElement.getModel(), coordinate);\n const { endAngle } = getAngle(lastElement.getModel(), coordinate);\n const center = coordinate.getCenter();\n const radius = coordinate.getRadius();\n const innterRadius = coordinate.innerRadius * radius;\n path = getSectorPath(center.x, center.y, radius, startAngle, endAngle, innterRadius);\n }\n\n if (this.regionPath) {\n this.regionPath.attr('path', path);\n this.regionPath.show();\n } else {\n const style = get(args, 'style', DEFAULT_REGION_PATH_STYLE);\n this.regionPath = backgroundGroup.addShape({\n type: 'path',\n name: 'active-region',\n capture: false,\n attrs: {\n ...style,\n path,\n },\n });\n }\n }\n }\n }\n /**\n * 隐藏\n */\n public hide() {\n if (this.regionPath) {\n this.regionPath.hide();\n }\n // this.regionPath = null;\n this.items = null;\n }\n /**\n * 销毁\n */\n public destroy() {\n this.hide();\n if (this.regionPath) {\n this.regionPath.remove(true);\n }\n super.destroy();\n }\n}\n\nexport default ActiveRegion;\n"]} |