137 lines
3.9 KiB
JavaScript
137 lines
3.9 KiB
JavaScript
// Menu-like Picker variant with keyboard control
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// Version 2020-04-27
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// License: LGPLv3.0+
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// (c) Vitaliy Filippov 2020+
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import React from 'react';
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import PropTypes from 'prop-types';
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import autocomplete_css from './autocomplete.css';
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import Picker from './Picker.js';
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export default class PickerMenu extends Picker
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{
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static propTypes = {
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...Picker.propTypes,
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// menu options
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items: PropTypes.array,
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// additional text/items to render before menu items
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beforeItems: PropTypes.any,
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// additional text/items to render after menu items
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afterItems: PropTypes.any,
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// menuitem callback
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onSelectItem: PropTypes.func,
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// menuitem name key - default empty (render the item itself)
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labelKey: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
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// change theme (CSS module) for this input
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theme: PropTypes.object,
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}
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onKeyDown = (ev) =>
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{
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if ((ev.which == 40 || ev.which == 38) && this.props.items.length)
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{
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// up / down
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this.setState({
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active: this.state.active == null ? 0 : (
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(this.state.active + (event.which === 40 ? 1 : this.props.items.length-1)) % this.props.items.length
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),
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});
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if (!this.state.focused)
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{
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this.focus();
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}
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}
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else if ((ev.which == 10 || ev.which == 13) && this.state.active != null &&
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this.state.active < this.props.items.length)
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{
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// enter
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this.onMouseDown();
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}
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}
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onMouseDown = () =>
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{
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const sel = this.props.items[this.state.active];
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const f = this.props.onSelectItem;
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f && f(sel);
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}
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onMouseOver = (ev) =>
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{
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let e = ev.target;
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while (e && e != ev.currentTarget && !e.id)
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{
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e = e.parentNode;
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}
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if (e && e.id)
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{
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this.setState({ active: e.id });
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}
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}
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animatePicker = (e) =>
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{
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if (e)
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{
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e.style.visibility = 'hidden';
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e.style.overflowY = 'hidden';
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const anim = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.msRequestAnimationFrame;
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anim(() =>
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{
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e.style.visibility = '';
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e.style.maxHeight = '1px';
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anim(() =>
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{
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e.style.maxHeight = '100%';
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const end = () => { e.style.overflowY = 'auto'; e.removeEventListener('transitionend', end); };
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e.addEventListener('transitionend', end);
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});
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});
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}
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}
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renderPicker = () =>
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{
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const theme = this.props.theme || autocomplete_css;
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return (<div ref={this.animatePicker}
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className={theme.suggestions}
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onMouseOver={this.onMouseOver}>
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{this.props.beforeItems}
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{this.props.items.map((e, i) => (<div key={i} id={i} onMouseDown={this.onMouseDown}
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className={theme.suggestion+(this.state.active == i ? ' '+theme.active : '')}>
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{!this.props.labelKey ? e : e[this.props.labelKey]}
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</div>))}
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{this.props.afterItems}
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</div>);
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}
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getInputProps()
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{
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return {
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...super.getInputProps(),
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onKeyDown: this.onKeyDown,
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};
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}
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componentDidUpdate()
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{
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super.componentDidUpdate();
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if (this.input)
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{
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if (this.prevHeight && this.input.offsetHeight != this.prevHeight)
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{
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this.calculateDirection();
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}
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this.prevHeight = this.input.offsetHeight;
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}
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}
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componentDidMount()
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{
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this.componentDidUpdate();
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}
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}
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delete PickerMenu.propTypes.renderPicker;
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