| 1 | 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{ Controller } from './base';\nimport { IGroup, Scrollbar as ScrollbarComponent, Scale } from '../../dependents';\nimport { ScrollbarOption, ComponentOption, ScrollbarCfg, Data, ScaleOption, Padding } from '../../interface';\nimport View from '../view';\nimport { BBox } from '../../util/bbox';\nimport { directionToPosition } from '../../util/direction';\nimport { COMPONENT_TYPE, DIRECTION, LAYER, VIEW_LIFE_CIRCLE } from '../../constant';\nimport { isObject, clamp, size, throttle, noop, get, valuesOfKey, deepMix } from '@antv/util';\nimport { isBetween } from '../../util/helper';\n\nconst DEFAULT_PADDING: number = 0;\nconst DEFAULT_SIZE: number = 8;\nconst DEFAULT_CATEGORY_SIZE: number = 32;\nconst MIN_THUMB_LENGTH: number = 20;\n\nexport default class Scrollbar extends Controller<ScrollbarOption> {\n private scrollbar: ComponentOption;\n private container: IGroup;\n\n private trackLen: number;\n private thumbLen: number;\n private cnt: number;\n private step: number;\n private ratio: number;\n private data: Data;\n private xScaleCfg: {\n field: string;\n values: string[];\n };\n private yScalesCfg: Scale[];\n\n private onChangeFn: (evt: {}) => void = noop;\n\n constructor(view: View) {\n super(view);\n this.container = this.view.getLayer(LAYER.FORE).addGroup();\n this.onChangeFn = throttle(this.onValueChange, 20, {\n leading: true,\n }) as (evt: {}) => void;\n this.trackLen = 0;\n this.thumbLen = 0;\n this.ratio = 0;\n\n this.view.on(VIEW_LIFE_CIRCLE.BEFORE_CHANGE_DATA, this.resetMeasure);\n this.view.on(VIEW_LIFE_CIRCLE.BEFORE_CHANGE_SIZE, this.resetMeasure);\n }\n\n get name(): string {\n return 'scrollbar';\n }\n\n public destroy() {\n super.destroy();\n this.view.off(VIEW_LIFE_CIRCLE.BEFORE_CHANGE_DATA, this.resetMeasure);\n this.view.off(VIEW_LIFE_CIRCLE.BEFORE_CHANGE_SIZE, this.resetMeasure);\n }\n\n public init() { }\n\n /**\n * 渲染\n */\n public render() {\n this.option = this.view.getOptions().scrollbar;\n\n if (this.option) {\n if (this.scrollbar) {\n // exist, update\n this.scrollbar = this.updateScrollbar();\n } else {\n // not exist, create\n this.scrollbar = this.createScrollbar();\n this.scrollbar.component.on('scrollchange', this.onChangeFn);\n }\n } else {\n if (this.scrollbar) {\n // exist, destroy\n this.scrollbar.component.destroy();\n this.scrollbar = undefined;\n }\n }\n }\n\n /**\n * 布局\n */\n public layout() {\n if (this.option && !this.trackLen) {\n this.measureScrollbar();\n setTimeout(() => {\n if (!this.view.destroyed) {\n this.changeViewData(this.getScrollRange(), true);\n }\n });\n }\n if (this.scrollbar) {\n const width = this.view.coordinateBBox.width;\n const padding: Padding = this.scrollbar.component.get('padding') as Padding;\n const bboxObject = this.scrollbar.component.getLayoutBBox();\n const bbox = new BBox(bboxObject.x, bboxObject.y, Math.min(bboxObject.width, width), bboxObject.height).expand(\n padding\n );\n const cfg = this.getScrollbarComponentCfg();\n\n let x: number;\n let y: number;\n\n if (cfg.isHorizontal) {\n const [x1, y1] = directionToPosition(this.view.viewBBox, bbox, DIRECTION.BOTTOM);\n const [x2, y2] = directionToPosition(this.view.coordinateBBox, bbox, DIRECTION.BOTTOM);\n x = x2;\n y = y1;\n } else {\n const [x1, y1] = directionToPosition(this.view.viewBBox, bbox, DIRECTION.RIGHT);\n const [x2, y2] = directionToPosition(this.view.viewBBox, bbox, DIRECTION.RIGHT);\n x = x2;\n y = y1;\n }\n\n x += padding[3];\n y += padding[0];\n\n // 默认放在 bottom\n if (this.trackLen) {\n this.scrollbar.component.update({\n ...cfg,\n x,\n y,\n trackLen: this.trackLen,\n thumbLen: this.thumbLen,\n thumbOffset: (this.trackLen - this.thumbLen) * this.ratio,\n });\n } else {\n this.scrollbar.component.update({\n ...cfg,\n x,\n y,\n });\n }\n\n this.view.viewBBox = this.view.viewBBox.cut(bbox, cfg.isHorizontal ? DIRECTION.BOTTOM : DIRECTION.RIGHT);\n }\n }\n\n /**\n * 更新\n */\n public update() {\n // 逻辑和 render 保持一致\n this.render();\n }\n\n public getComponents() {\n return this.scrollbar ? [this.scrollbar] : [];\n }\n\n public clear() {\n if (this.scrollbar) {\n this.scrollbar.component.destroy();\n this.scrollbar = undefined;\n }\n this.trackLen = 0;\n this.thumbLen = 0;\n this.ratio = 0;\n this.cnt = 0;\n this.step = 0;\n this.data = undefined;\n this.xScaleCfg = undefined;\n this.yScalesCfg = [];\n }\n\n /** 设置滚动条位置 */\n public setValue(ratio: number) {\n this.onValueChange({ ratio });\n }\n\n /** 获得滚动条位置 */\n public getValue() {\n return this.ratio;\n }\n\n /**\n * 获取 scrollbar 的主题配置\n */\n private getThemeOptions() {\n const theme = this.view.getTheme();\n return get(theme, ['components', 'scrollbar', 'common'], {});\n }\n\n /**\n * 获取 scrollbar 组件的主题样式\n */\n private getScrollbarTheme(style?: ScrollbarCfg['style']) {\n const theme = get(this.view.getTheme(), ['components', 'scrollbar']);\n const { thumbHighlightColor, ...restStyles } = style || {};\n return {\n default: deepMix({}, get(theme, ['default', 'style'], {}), restStyles),\n hover: deepMix({}, get(theme, ['hover', 'style'], {}), { thumbColor: thumbHighlightColor }),\n };\n }\n\n private resetMeasure = () => {\n this.clear();\n };\n\n private onValueChange = ({ ratio }: { ratio: number }) => {\n const { animate } = this.getValidScrollbarCfg();\n this.ratio = clamp(ratio, 0, 1);\n const originalAnimate = this.view.getOptions().animate;\n if (!animate) {\n this.view.animate(false);\n }\n this.changeViewData(this.getScrollRange(), true);\n this.view.animate(originalAnimate);\n };\n\n private measureScrollbar(): void {\n const xScale = this.view.getXScale();\n const yScales = this.view.getYScales().slice();\n this.data = this.getScrollbarData();\n this.step = this.getStep();\n this.cnt = this.getCnt();\n const { trackLen, thumbLen } = this.getScrollbarComponentCfg();\n this.trackLen = trackLen;\n this.thumbLen = thumbLen;\n this.xScaleCfg = {\n field: xScale.field,\n values: xScale.values || [],\n };\n this.yScalesCfg = yScales;\n }\n\n private getScrollRange(): [number, number] {\n const startIdx: number = Math.floor((this.cnt - this.step) * clamp(this.ratio, 0, 1));\n const endIdx: number = Math.min(startIdx + this.step - 1, this.cnt - 1);\n return [startIdx, endIdx];\n }\n\n private changeViewData([startIdx, endIdx]: [number, number], render?: boolean): void {\n const { type } = this.getValidScrollbarCfg();\n const isHorizontal = type !== 'vertical';\n const values = valuesOfKey(this.data, this.xScaleCfg.field);\n\n // 如果是 xScale 数值类型，则进行排序\n const xScaleValues = this.view.getXScale().isLinear ? values.sort((a, b) => Number(a) - Number(b)) : values;\n\n const xValues = isHorizontal ? xScaleValues : xScaleValues.reverse();\n this.yScalesCfg.forEach((cfg) => {\n this.view.scale(cfg.field, {\n formatter: cfg.formatter,\n type: cfg.type as ScaleOption['type'],\n min: cfg.min,\n max: cfg.max,\n tickMethod: cfg.tickMethod\n });\n });\n this.view.filter(this.xScaleCfg.field, (val) => {\n const idx = xValues.indexOf(val);\n return idx > -1 ? isBetween(idx, startIdx, endIdx) : true;\n });\n this.view.render(true);\n }\n\n private createScrollbar(): ComponentOption {\n const { type } = this.getValidScrollbarCfg();\n const isHorizontal = type !== 'vertical';\n const component = new ScrollbarComponent({\n container: this.container,\n ...this.getScrollbarComponentCfg(),\n x: 0,\n y: 0,\n });\n\n component.init();\n\n return {\n component,\n layer: LAYER.FORE,\n direction: isHorizontal ? DIRECTION.BOTTOM : DIRECTION.RIGHT,\n type: COMPONENT_TYPE.SCROLLBAR,\n };\n }\n\n private updateScrollbar(): ComponentOption {\n const config = this.getScrollbarComponentCfg();\n const realConfig = this.trackLen\n ? {\n ...config,\n trackLen: this.trackLen,\n thumbLen: this.thumbLen,\n thumbOffset: (this.trackLen - this.thumbLen) * this.ratio,\n }\n : { ...config };\n this.scrollbar.component.update(realConfig);\n\n return this.scrollbar;\n }\n\n private getStep() {\n if (this.step) {\n return this.step;\n }\n const { coordinateBBox } = this.view;\n const { type, categorySize } = this.getValidScrollbarCfg();\n const isHorizontal = type !== 'vertical';\n\n return Math.floor((isHorizontal ? coordinateBBox.width : coordinateBBox.height) / categorySize);\n }\n\n private getCnt() {\n if (this.cnt) {\n return this.cnt;\n }\n const xScale = this.view.getXScale();\n const data = this.getScrollbarData();\n const values = valuesOfKey(data, xScale.field);\n return size(values);\n }\n\n private getScrollbarComponentCfg() {\n const { coordinateBBox, viewBBox } = this.view;\n const { type, padding, width, height, style } = this.getValidScrollbarCfg();\n const isHorizontal = type !== 'vertical';\n const [paddingTop, paddingRight, paddingBottom, paddingLeft] = padding;\n const position = isHorizontal\n ? {\n x: coordinateBBox.minX + paddingLeft,\n y: viewBBox.maxY - height - paddingBottom,\n }\n : {\n x: viewBBox.maxX - width - paddingRight,\n y: coordinateBBox.minY + paddingTop,\n };\n const step = this.getStep();\n const cnt = this.getCnt();\n const trackLen = isHorizontal\n ? coordinateBBox.width - paddingLeft - paddingRight\n : coordinateBBox.height - paddingTop - paddingBottom;\n const thumbLen = Math.max(trackLen * clamp(step / cnt, 0, 1), MIN_THUMB_LENGTH);\n\n return {\n ...this.getThemeOptions(),\n x: position.x,\n y: position.y,\n size: isHorizontal ? height : width,\n isHorizontal,\n trackLen,\n thumbLen,\n thumbOffset: 0,\n theme: this.getScrollbarTheme(style),\n };\n }\n\n /**\n * 填充一些默认的配置项目\n */\n private getValidScrollbarCfg(): Required<ScrollbarCfg> {\n let cfg: Required<ScrollbarCfg> = {\n type: 'horizontal',\n categorySize: DEFAULT_CATEGORY_SIZE,\n width: DEFAULT_SIZE,\n height: DEFAULT_SIZE,\n padding: [0, 0, 0, 0],\n animate: true,\n style: {},\n };\n if (isObject(this.option)) {\n cfg = { ...cfg, ...this.option };\n }\n if (!isObject(this.option) || !this.option.padding) {\n cfg.padding =\n cfg.type === 'horizontal' ? [DEFAULT_PADDING, 0, DEFAULT_PADDING, 0] : [0, DEFAULT_PADDING, 0, DEFAULT_PADDING];\n }\n\n return cfg;\n }\n\n /**\n * 获取数据\n */\n private getScrollbarData(): Data {\n const coordinate = this.view.getCoordinate();\n const cfg = this.getValidScrollbarCfg();\n let data = this.view.getOptions().data || [];\n // 纵向做了 y 轴镜像之后，数据也需要镜像反转\n if (coordinate.isReflect('y') && cfg.type === 'vertical') {\n data = [...data].reverse();\n }\n\n return data;\n }\n}\n"]} |