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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,154 @@ | ||
| import { isFunction } from '@antv/util'; | ||
| import Component from '../../base/component'; | ||
| import { ShapeAttrs, Point } from '../../types'; | ||
|
|
||
| function isEqual(origin1, origin2, fields: string[]) { | ||
| if (origin1 === origin2) { | ||
| return true; | ||
| } | ||
| for (let i = 0, len = fields.length; i < len; i++) { | ||
| const field = fields[i]; | ||
| if (origin1[field] !== origin2[field]) { | ||
| return false; | ||
| } | ||
| } | ||
| return true; | ||
| } | ||
|
|
||
| type StyleType = (record: any) => ShapeAttrs; | ||
|
|
||
| export interface SelectionProps { | ||
| selection?: { | ||
| type?: 'single' | 'multiple'; | ||
| defaultSelected?: any[]; | ||
| selectedStyle: ShapeAttrs | StyleType; | ||
| unSelectedStyle: ShapeAttrs | StyleType; | ||
| cancelable: boolean; | ||
| }; | ||
| [k: string]: any; | ||
| } | ||
|
|
||
| export interface SelectionState { | ||
| selected: any[]; | ||
| } | ||
|
|
||
| class Selection< | ||
| P extends SelectionProps = SelectionProps, | ||
| S extends SelectionState = SelectionState | ||
| > extends Component<P, S> { | ||
| constructor(props: P, context) { | ||
| super(props, context); | ||
|
|
||
| const { selection } = props; | ||
| if (!selection) return; | ||
| const { defaultSelected } = selection; | ||
| this.state.selected = defaultSelected; | ||
| } | ||
|
|
||
| didMount() { | ||
| const { props, state, container } = this; | ||
| const canvas = container.get('canvas'); | ||
| canvas.on('click', (ev) => { | ||
| const { selection, chart } = props; | ||
| if (!selection) return; | ||
| const { points } = ev; | ||
| const records = this.getSnapRecords(points[0]); | ||
| const { type = 'single', cancelable = true } = selection; | ||
| if (!records || !records.length) { | ||
| if (cancelable) { | ||
| this.setState({ | ||
| selected: null, | ||
| } as S); | ||
| } | ||
| } | ||
|
|
||
| const { selected } = state; | ||
| const origins = records.map((record) => record.origin); | ||
| if (!selected || !selected.length) { | ||
| this.setState({ | ||
| selected: origins, | ||
| } as S); | ||
| } | ||
|
|
||
| if (type === 'single') { | ||
| if (!cancelable) { | ||
| this.setState({ | ||
| selected: origins, | ||
| } as S); | ||
| return; | ||
| } | ||
| const newSelected = []; | ||
| records.forEach((record) => { | ||
| if (!this.isSelected(record)) { | ||
| newSelected.push(record.origin); | ||
| } | ||
| }); | ||
| this.setState({ | ||
| selected: newSelected, | ||
| } as S); | ||
| return; | ||
| } | ||
|
|
||
| // 多选 | ||
| const scales = chart.getScales(); | ||
| const fields = Object.keys(scales); | ||
| const selectedMap = {}; | ||
| selected.forEach((item) => { | ||
| const key = fields.map((field) => item[field]).join('-'); | ||
| selectedMap[key] = item; | ||
| }); | ||
| records.forEach((record) => { | ||
| const { origin } = record; | ||
| const key = fields.map((field) => origin[field]).join('-'); | ||
| selectedMap[key] = selectedMap[key] ? null : origin; | ||
| }); | ||
|
|
||
| const newSelected = Object.keys(selectedMap) | ||
| .map((key) => selectedMap[key]) | ||
| .filter(Boolean); | ||
|
|
||
| this.setState({ | ||
| selected: newSelected, | ||
| } as S); | ||
| }); | ||
| } | ||
|
|
||
| getSnapRecords(_point: Point) { | ||
| return null; | ||
| } | ||
|
|
||
| isSelected(record) { | ||
| const { state, props } = this; | ||
| const { selected } = state; | ||
| if (!selected || !selected.length) { | ||
| return false; | ||
| } | ||
| const { chart } = props; | ||
| const scales = chart.getScales(); | ||
| const fields = Object.keys(scales); | ||
| for (let i = 0, len = selected.length; i < len; i++) { | ||
| const item = selected[i]; | ||
| if (isEqual(record.origin, item, fields)) { | ||
| return true; | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
|
|
||
| getSelectionStyle(record) { | ||
| const { state, props } = this; | ||
| const { selected } = state; | ||
| if (!selected || !selected.length) { | ||
| return null; | ||
| } | ||
| const { selection } = props; | ||
| const { selectedStyle, unSelectedStyle } = selection; | ||
| const isSelected = this.isSelected(record); | ||
| if (isSelected) { | ||
| return isFunction(selectedStyle) ? selectedStyle(record) : selectedStyle; | ||
| } | ||
| return isFunction(unSelectedStyle) ? unSelectedStyle(record) : unSelectedStyle; | ||
| } | ||
| } | ||
|
|
||
| export default Selection; |
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