redoc/demo/ComboBox.tsx
2018-03-22 18:22:11 +02:00

227 lines
5.0 KiB
TypeScript

/**
* Could not find ready-to-use component with required behaviour so
* I quickly hacked my own. Will refactor into separate npm package later
*/
import * as React from 'react';
import styled, { StyledFunction } from 'styled-components';
function withProps<T, U extends HTMLElement = HTMLElement>(
styledFunction: StyledFunction<React.HTMLProps<U>>,
): StyledFunction<T & React.HTMLProps<U>> {
return styledFunction;
}
const DropDownItem = withProps<{ active: boolean }>(styled.li)`
${props => ((props as any).active ? 'background-color: #eee' : '')};
padding: 13px 16px;
&:hover {
background-color: #eee;
}
cursor: pointer;
text-overflow: ellipsis;
overflow: hidden;
`;
const DropDownList = styled.ul`
box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.14), 0 1px 5px 0 rgba(0, 0, 0, 0.12),
0 3px 1px -2px rgba(0, 0, 0, 0.2);
background: #fff;
border-radius: 0 0 2px 2px;
top: 100%;
left: 0;
right: 0;
z-index: 200;
overflow: hidden;
position: absolute;
list-style: none;
margin: 4px 0 0 0;
padding: 5px 0;
font-family: 'Lato';
overflow: hidden;
`;
const ComboBoxWrap = styled.div`
position: relative;
width: 100%;
max-width: 500px;
display: flex;
`;
const Input = styled.input`
box-sizing: border-box;
width: 100%;
padding: 0 10px;
color: #555;
background-color: #fff;
border: 1px solid #ccc;
font-size: 16px;
height: 28px;
box-sizing: border-box;
vertical-align: middle;
line-height: 1;
outline: none;
box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
transition: border-color ease-in-out 0.15s, box-shadow ease-in-out 0.15s;
&:focus {
border-color: #66afe9;
outline: 0;
box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(102, 175, 233, 0.6);
}
`;
const Button = styled.button`
background-color: #fff;
color: #333;
padding: 2px 10px;
touch-action: manipulation;
cursor: pointer;
user-select: none;
border: 1px solid #ccc;
border-left: 0;
font-size: 16px;
height: 28px;
box-sizing: border-box;
vertical-align: middle;
line-height: 1;
outline: none;
width: 80px;
white-space: nowrap;
@media screen and (max-width: 450px) {
display: none;
}
`;
export interface ComboBoxProps {
onChange?: (val: string) => void;
options: Array<{ value: string; label: string }>;
placeholder?: string;
value?: string;
}
export interface ComboBoxState {
open: boolean;
value: string;
activeItemIdx: number;
}
export default class ComboBox extends React.Component<ComboBoxProps, ComboBoxState> {
state = {
open: false,
value: this.props.value || '',
activeItemIdx: -1,
};
open = () => {
this.setState({
open: true,
});
};
close = () => {
this.setState({
open: false,
activeItemIdx: -1,
});
};
handleChange = e => {
this.updateValue(e.currentTarget.value);
};
updateValue(value) {
this.setState({
value,
activeItemIdx: -1,
});
}
handleSelect(value: string) {
this.updateValue(value);
if (this.props.onChange) {
this.props.onChange(value);
}
this.close();
}
handleTryItClick = () => {
this.handleSelect(this.state.value);
};
handleKeyPress = (e: React.KeyboardEvent<HTMLInputElement>) => {
if (e.keyCode === 13) {
this.handleSelect(e.currentTarget.value);
} else if (e.keyCode === 40) {
const activeItemIdx = Math.min(this.props.options.length - 1, ++this.state.activeItemIdx);
this.setState({
open: true,
activeItemIdx,
value: this.props.options[activeItemIdx].value,
});
e.preventDefault();
} else if (e.keyCode === 38) {
const activeItemIdx = Math.max(0, --this.state.activeItemIdx);
this.setState({
activeItemIdx,
value: this.props.options[activeItemIdx].value,
});
e.preventDefault();
} else if (e.keyCode === 27) {
this.close();
}
};
handleBlur = () => {
setTimeout(() => this.close(), 100);
};
handleItemClick = (val, idx) => {
this.handleSelect(val);
this.setState({
activeItemIdx: idx,
});
};
renderOption = (option: { value: string; label: string }, idx: number) => {
return (
<DropDownItem
active={idx === this.state.activeItemIdx}
key={option.value}
// tslint:disable-next-line
onMouseDown={() => {
this.handleItemClick(option.value, idx);
}}
>
<small>
<strong>{option.label}</strong>
</small>
<br />
{option.value}
</DropDownItem>
);
};
render() {
const { open, value } = this.state;
const { options, placeholder } = this.props;
return (
<ComboBoxWrap>
<Input
placeholder={placeholder}
onChange={this.handleChange}
value={value}
onFocus={this.open}
onBlur={this.handleBlur}
onKeyDown={this.handleKeyPress}
/>
<Button onClick={this.handleTryItClick}> TRY IT </Button>
{open && <DropDownList>{options.map(this.renderOption)}</DropDownList>}
</ComboBoxWrap>
);
}
}