76 lines
1.9 KiB
TypeScript
76 lines
1.9 KiB
TypeScript
import React, { PureComponent } from 'react';
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import PropTypes from 'prop-types';
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import './ImageScrollbar.css';
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class ImageScrollbar extends PureComponent {
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static propTypes = {
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value: PropTypes.number.isRequired,
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max: PropTypes.number.isRequired,
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height: PropTypes.string.isRequired,
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onChange: PropTypes.func.isRequired,
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onContextMenu: PropTypes.func,
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};
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render() {
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if (this.props.max === 0) {
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return null;
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}
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this.style = {
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width: `${this.props.height}`,
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};
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const { onContextMenu = e => e.preventDefault() } = this.props;
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return (
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<div
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className="scroll"
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onContextMenu={onContextMenu}
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>
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<div className="scroll-holder">
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<input
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// adding mousetrap let the mousetrap know about the scrollbar otherwise,
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// it will not capture the keyboard event
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className="imageSlider mousetrap"
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style={this.style}
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type="range"
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min="0"
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max={this.props.max}
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step="1"
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value={this.props.value}
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onChange={this.onChange}
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onKeyDown={this.onKeyDown}
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/>
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</div>
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</div>
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);
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}
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onChange = event => {
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const intValue = parseInt(event.target.value, 10);
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this.props.onChange(intValue);
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};
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onKeyDown = event => {
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// We don't allow direct keyboard up/down input on the
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// image sliders since the natural direction is reversed (0 is at the top)
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// Store the KeyCodes in an object for readability
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const keys = {
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DOWN: 40,
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UP: 38,
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};
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// TODO: Enable scroll down / scroll up without depending on ohif-core
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if (event.which === keys.DOWN) {
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//OHIF.commands.run('scrollDown');
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event.preventDefault();
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} else if (event.which === keys.UP) {
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//OHIF.commands.run('scrollUp');
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event.preventDefault();
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}
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};
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}
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export default ImageScrollbar;
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