zz-chart/lib/components/legend.js

Alauda Chart components by Alauda Frontend Team

import { StyleSheet, css } from 'aphrodite/no-important.js';
import { get, isBoolean, isObject } from 'lodash-es';
import { ChartEvent, DIRECTION } from '../types/index.js';
import { generateName } from '../utils/index.js';
import { BaseComponent } from './base.js';
import { Header } from './header.js';
import { symbolStyle } from './styles.js';
const styles = StyleSheet.create({
    ul: {
        listStyle: 'none',
        padding: 0,
        margin: 0,
        display: 'flex',
        flexWrap: 'wrap',
    },
    item: {
        padding: 0,
        display: 'flex',
        alignItems: 'center',
        cursor: 'pointer',
        ':not(:last-child)': {
            marginRight: 12,
        },
    },
    name: {
        display: 'block',
        whiteSpace: 'nowrap',
    },
    legend: {
        display: 'flex',
        marginTop: 8,
    },
    bottom: {
        justifyContent: 'center',
    },
    'bottom-left': {
        justifyContent: 'flex-start',
    },
    'bottom-right': {
        justifyContent: 'flex-end',
    },
});
export class Legend extends BaseComponent {
    constructor() {
        super(...arguments);
        this.inactivatedSet = new Set();
    }
    get name() {
        return 'legend';
    }
    render() {
        const opt = this.ctrl.getOption();
        this.option = get(opt, this.name, {});
        if (!this.container) {
            this.create();
        }
        else {
            this.update();
        }
    }
    update() {
        this.option = get(this.ctrl.getOption(), this.name);
        this.createItem();
    }
    create() {
        if (isObject(this.option) || this.option === true) {
            const { position } = isBoolean(this.option)
                ? { position: DIRECTION.TOP_RIGHT }
                : this.option;
            let dom = this.ctrl.container;
            this.container = document.createElement('div');
            this.container.className = generateName('legend');
            if (position?.includes('top') || !position) {
                const header = new Header(this.ctrl, position?.includes('top')
                    ? position
                    : DIRECTION.TOP_RIGHT);
                dom = header.container;
                dom.append(this.container);
                this.createItem();
            }
            else {
                this.ctrl.on(ChartEvent.U_PLOT_READY, () => {
                    dom.append(this.container);
                    this.container.className = `${generateName('legend')} ${css(styles.legend)} ${css(styles[position])}`;
                    this.createItem();
                });
            }
        }
    }
    createItem() {
        if ((isObject(this.option) || this.option === true) &&
            !get(this.option, 'custom')) {
            this.container.innerHTML = '';
            const ul = document.createElement('ul');
            ul.className = css(styles.ul);
            const data = this.getLegend();
            for (const key of data.entries()) {
                const li = document.createElement('li');
                const value = key[1];
                li.className = css(styles.item);
                li.innerHTML = `
        <span class="${css(symbolStyle.symbol)} ${css(symbolStyle.line)}" style="background: ${value.color};"></span> 
        <span class="${css(styles.name)}">${value.name}</span>`;
                ul.append(li);
                // TODO: 挪到 interaction 管理
                li.addEventListener('click', () => {
                    const activated = li.style.opacity === '1' || !li.style.opacity;
                    li.style.opacity = activated ? '0.5' : '1';
                    value.activated = !activated;
                    this.legendItemClick({
                        name: value.name,
                        activated: !activated,
                    });
                });
                // li.addEventListener('mouseenter', e => {
                //   console.log(e);
                //   const item = this.container.querySelectorAll('li');
                //   item.forEach(value => {
                //     if (li !== value) {
                //       value.style.opacity = '0.5';
                //     }
                //   });
                // });
                // li.addEventListener('mouseleave', () => {
                //   const item = this.container.querySelectorAll('li');
                //   item.forEach(value => {
                //     value.style.opacity = '1';
                //   });
                // });
            }
            this.container.append(ul);
        }
    }
    legendItemClick(props) {
        if (props.activated) {
            this.inactivatedSet.delete(props.name);
        }
        else {
            this.inactivatedSet.add(props.name);
        }
        this.ctrl.emit(ChartEvent.LEGEND_ITEM_CLICK, props);
    }
    getLegend() {
        const data = this.ctrl.getData();
        return data
            .map(({ name, color }) => ({
            name,
            color,
            activated: !this.inactivatedSet.has(name),
        }))
            .filter(d => d.name);
    }
}
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