124 lines
3.0 KiB
TypeScript
124 lines
3.0 KiB
TypeScript
import React, { PureComponent } from 'react';
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import classnames from 'classnames';
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import DropdownShell from './DropdownShell';
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interface Props<T> {
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value: T | undefined;
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options: T[];
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ariaLabel: string;
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label?: string;
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extra?: any;
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size?: string;
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color?: string;
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menuAlign?: string;
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formatTitle?(option: T): any;
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onChange?(value: T): void;
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}
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interface State {
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search: string;
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}
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export default class DropdownComponent<T> extends PureComponent<Props<T>, State> {
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public state = {
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search: ''
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};
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private dropdownShell: DropdownShell | null;
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public render() {
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const { ariaLabel, color, size } = this.props;
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return (
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<DropdownShell
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renderLabel={this.renderLabel}
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renderOptions={this.renderOptions}
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size={size}
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color={color}
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ariaLabel={ariaLabel}
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ref={el => (this.dropdownShell = el)}
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/>
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);
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}
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private renderLabel = () => {
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const { value } = this.props;
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const labelStr = this.props.label ? `${this.props.label}:` : '';
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return (
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<span>
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{labelStr} {this.formatTitle(value)}
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</span>
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);
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};
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private renderOptions = () => {
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const { options, value, menuAlign, extra } = this.props;
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const { search } = this.state;
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const searchable = options.length > 20;
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const menuClass = classnames({
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'dropdown-menu': true,
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[`dropdown-menu-${menuAlign || ''}`]: !!menuAlign
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});
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const searchableStyle = {
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maxHeight: '300px',
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overflowY: 'auto'
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};
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const searchRegex = new RegExp(search, 'gi');
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const onSearchChange = (e: React.FormEvent<HTMLInputElement>) => {
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this.setState({ search: e.currentTarget.value });
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};
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return (
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<ul className={menuClass} style={searchable ? searchableStyle : {}}>
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{searchable && (
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<input
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className="form-control"
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placeholder={'Search'}
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onChange={onSearchChange}
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value={search}
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/>
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)}
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{options
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.filter(option => {
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if (searchable && search.length) {
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return option.toString().match(searchRegex);
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}
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return true;
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})
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.map((option, i) => {
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return (
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<li key={i}>
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<a
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className={option === value ? 'active' : ''}
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onClick={this.onChange.bind(null, option)}
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>
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{this.props.formatTitle ? this.formatTitle(option) : option}
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</a>
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</li>
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);
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})}
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{extra && <li key={'separator'} role="separator" className="divider" />}
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{extra}
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</ul>
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);
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};
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private formatTitle = (option: any) => {
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if (this.props.formatTitle) {
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return this.props.formatTitle(option);
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} else {
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return option;
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}
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};
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private onChange = (value: any) => {
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if (this.props.onChange) {
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this.props.onChange(value);
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}
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if (this.dropdownShell) {
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this.dropdownShell.close();
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}
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};
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}
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