d2066ba5f5
* Clamp font size when disabling "Use custom size" * Switch Slider to use a semantic input range element * Iterate * delint * delint * snapshot * Iterate * Iterate * Fix step size * Add focus outline to slider * Derp
86 lines
2.5 KiB
TypeScript
86 lines
2.5 KiB
TypeScript
/*
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Copyright 2020 The Matrix.org Foundation C.I.C.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import * as React from "react";
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import { ChangeEvent } from "react";
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interface IProps {
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// A callback for the selected value
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onChange: (value: number) => void;
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// The current value of the slider
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value: number;
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// The min and max of the slider
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min: number;
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max: number;
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// The step size of the slider, can be a number or "any"
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step: number | "any";
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// A function for formatting the values
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displayFunc: (value: number) => string;
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// Whether the slider is disabled
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disabled: boolean;
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}
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const THUMB_SIZE = 2.4; // em
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export default class Slider extends React.Component<IProps> {
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private get position(): number {
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const { min, max, value } = this.props;
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return Number(((value - min) * 100) / (max - min));
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}
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private onChange = (ev: ChangeEvent<HTMLInputElement>): void => {
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this.props.onChange(parseInt(ev.target.value, 10));
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};
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public render(): React.ReactNode {
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let selection: JSX.Element | undefined;
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if (!this.props.disabled) {
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const position = this.position;
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selection = (
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<output
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className="mx_Slider_selection"
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style={{
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left: `calc(2px + ${position}% + ${THUMB_SIZE / 2}em - ${(position / 100) * THUMB_SIZE}em)`,
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}}
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>
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<span className="mx_Slider_selection_label">{this.props.value}</span>
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</output>
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);
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}
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return (
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<div className="mx_Slider">
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<input
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type="range"
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min={this.props.min}
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max={this.props.max}
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value={this.props.value}
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onChange={this.onChange}
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disabled={this.props.disabled}
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step={this.props.step}
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autoComplete="off"
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/>
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{selection}
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</div>
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);
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}
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}
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