@visactor/vchart/esm/interaction/triggers/element-highlight-by-group.js

charts lib based @visactor/VGrammar

import { Factory } from "../../core/factory";

import { BaseTrigger } from "./base";

import { isNil } from "@visactor/vutils";

import { highlightDefaultOptions } from "./util";

const type = "element-highlight-by-group";

export class ElementHighlightByGroup extends BaseTrigger {
    constructor(options) {
        super(options), this.type = type, this.handleStart = e => {
            this.start(e.item);
        }, this.handleReset = e => {
            const g = e.item;
            g && this.isGraphicInMark(g) && this.resetAll();
        }, this.options = Object.assign({}, highlightDefaultOptions, options), this.updateMarkIdByState([ this.options.highlightState, this.options.blurState ]);
    }
    getStartState() {
        return this.options.highlightState;
    }
    getResetState() {
        return this.options.blurState;
    }
    getEvents() {
        return [ {
            type: this.options.trigger,
            handler: this.handleStart
        }, {
            type: this.options.triggerOff,
            handler: this.handleReset
        } ];
    }
    resetAll() {
        const {interaction: interaction, highlightState: highlightState, blurState: blurState} = this.options;
        interaction.clearAllStatesOfTrigger(this, highlightState, blurState), interaction.setStatedGraphics(this, []);
    }
    _getHightlightKey(g) {
        var _a;
        return null === (_a = g.context) || void 0 === _a ? void 0 : _a.groupKey;
    }
    start(g) {
        if (g && this.isGraphicInMark(g)) {
            const highlightKey = this._getHightlightKey(g);
            if (isNil(highlightKey)) return;
            const {interaction: interaction, highlightState: highlightState, blurState: blurState} = this.options, statedGraphics = interaction.getStatedGraphics(this), newStatedGraphics = [];
            this.getMarks().forEach((m => {
                var _a;
                null === (_a = m.getGraphics()) || void 0 === _a || _a.forEach((g => {
                    this._getHightlightKey(g) === highlightKey && newStatedGraphics.push(g);
                }));
            })), interaction.updateStates(this, newStatedGraphics, statedGraphics, highlightState, blurState), 
            interaction.setStatedGraphics(this, newStatedGraphics);
        }
    }
    reset(g) {
        if (g) {
            if (this.isGraphicInMark(g)) {
                const {interaction: interaction} = this.options, statedGraphics = interaction.getStatedGraphics(this);
                g.removeState([ this.options.highlightState, this.options.blurState ]), interaction.setStatedGraphics(this, statedGraphics.filter((sg => sg !== g)));
            }
        } else this.resetAll();
    }
}

ElementHighlightByGroup.type = type, ElementHighlightByGroup.defaultOptions = highlightDefaultOptions;

export const registerElementHighlightByGroup = () => {
    Factory.registerInteractionTrigger(type, ElementHighlightByGroup);
};
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