mirror of
https://github.com/visgl/react-map-gl.git
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97 lines
3.2 KiB
JavaScript
97 lines
3.2 KiB
JavaScript
// @flow
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// Copyright (c) 2015 Uber Technologies, Inc.
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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import React from 'react';
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import PropTypes from 'prop-types';
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import DraggableControl from './draggable-control';
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import type {DraggableControlProps} from './draggable-control';
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const propTypes = Object.assign({}, DraggableControl.propTypes, {
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// Custom className
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className: PropTypes.string,
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// Longitude of the anchor point
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longitude: PropTypes.number.isRequired,
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// Latitude of the anchor point
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latitude: PropTypes.number.isRequired
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});
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const defaultProps = Object.assign({}, DraggableControl.defaultProps, {
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className: ''
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});
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export type MarkerProps = DraggableControlProps & {
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className: string,
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longitude: number,
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latitude: number
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};
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/*
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* PureComponent doesn't update when context changes.
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* The only way is to implement our own shouldComponentUpdate here. Considering
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* the parent component (StaticMap or InteractiveMap) is pure, and map re-render
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* is almost always triggered by a viewport change, we almost definitely need to
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* recalculate the marker's position when the parent re-renders.
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*/
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export default class Marker extends DraggableControl<MarkerProps> {
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static propTypes = propTypes;
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static defaultProps = defaultProps;
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_getPosition(): [number, number] {
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const {longitude, latitude, offsetLeft, offsetTop} = this.props;
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const {dragPos, dragOffset} = this.state;
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// If dragging, just return the current drag position
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if (dragPos && dragOffset) {
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return this._getDraggedPosition(dragPos, dragOffset);
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}
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// Otherwise return the projected lat/lng with offset
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let [x, y] = this._context.viewport.project([longitude, latitude]);
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x += offsetLeft;
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y += offsetTop;
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return [x, y];
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}
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_render() {
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const {className, draggable} = this.props;
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const {dragPos} = this.state;
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const [x, y] = this._getPosition();
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const containerStyle = {
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position: 'absolute',
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left: x,
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top: y,
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cursor: draggable ? (dragPos ? 'grabbing' : 'grab') : 'auto'
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};
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return (
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<div
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className={`mapboxgl-marker ${className}`}
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ref={this._containerRef}
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style={containerStyle}
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>
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{this.props.children}
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</div>
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);
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}
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}
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