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MapvLayer.js
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274 lines (255 loc) · 7.58 KB
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/* Copyright© 2000 - 2023 SuperMap Software Co.Ltd. All rights reserved.
* This program are made available under the terms of the Apache License, Version 2.0
* which accompanies this distribution and is available at http://www.apache.org/licenses/LICENSE-2.0.html.*/
import '../core/Base';
import mapboxgl from 'mapbox-gl';
import { MapvRenderer } from '@supermap/iclient-common/overlay/mapv/MapvRenderer';
import { Util as CommonUtil } from '@supermap/iclient-common/commontypes/Util';
import {
getMeterPerMapUnit
} from '@supermap/iclient-common/util/MapCalculateUtil';
/**
* @class MapvLayer
* @category Visualization MapV
* @classdesc Mapv 图层类。
* @modulecategory Overlay
* @param {mapboxgl.Map} map - MapBoxGL Map 对象，将在下个版本弃用，请用 map.addLayer() 方法添加图层。
* @param {Mapv.DataSet} dataSet - MapV 图层数据集。
* @param {Object} mapVOptions - Mapv 参数。
* @param {string} [mapVOptions.layerID] - 图层 ID。默认使用 CommonUtil.createUniqueID("mapvLayer_") 创建专题图层 ID。
* @usage
*/
export class MapvLayer {
constructor(map, dataSet, mapVOptions) {
if (arguments.length === 3) {
this.map = map;
delete mapVOptions['layerID'];
this.mapVOptions = mapVOptions;
this.dataSet = dataSet;
} else {
this.dataSet = map;
delete dataSet['layerID'];
this.mapVOptions = dataSet;
}
this.id = this.mapVOptions.layerID ? this.mapVOptions.layerID : CommonUtil.createUniqueID('mapvLayer_');
this.type = 'custom';
this.visibility = true;
this.renderingMode = '3d';
this.overlay = true;
this.context = this.mapVOptions.context || '2d';
//保留之前的用法
if (this.map) {
this.map.addLayer(this);
}
}
/**
* @function MapvLayer.prototype.onAdd
* @description 添加图层到地图。
* @param {Object} map - 地图对象。
*/
onAdd(map) {
this.map = map;
this.mapContainer = map.getCanvasContainer();
this.renderer = new MapvRenderer(map, this.dataSet, this.mapVOptions, {
transferCoordinate: this._transferCoordinate,
getCenterPixel: this._getCenterPixel,
getResolution: this._getResolution,
validZoom: this._validZoom.bind(this)
}, { mapElement: this.map.getCanvas(), targetElement: this.mapContainer, id: this.id });
this.mapContainer.style.perspective = this.map.transform.cameraToCenterDistance + 'px';
this.bindEvent();
}
/**
* @function MapvLayer.prototype.onRemove
* @description 移除图层。
*/
onRemove() {
this.renderer.destroy();
this.unbindEvent();
}
/**
* @function MapvLayer.prototype.render
* @description 渲染图层。
*/
render() {
this.renderer && this.renderer.draw();
}
_transferCoordinate() {
let map = this.map;
var bounds = map.getBounds(),
dw = bounds.getEast() - bounds.getWest(),
dh = bounds.getNorth() - bounds.getSouth();
let rect = map.getCanvas().getBoundingClientRect();
var resolutionX = dw / rect.width,
resolutionY = dh / rect.height;
var center = map.getCenter();
var centerPx = map.project(center);
var self = this;
return function (coordinate) {
if (map.transform.rotationMatrix || self.context === '2d') {
var worldPoint = map.project(new mapboxgl.LngLat(coordinate[0], coordinate[1]));
return [worldPoint.x, worldPoint.y];
}
var pixel = [(coordinate[0] - center.lng) / resolutionX, (center.lat - coordinate[1]) / resolutionY];
return [pixel[0] + centerPx.x, pixel[1] + centerPx.y];
}
}
_validZoom() {
if (
(this.mapVOptions.minZoom && this.map.getZoom() < this.mapVOptions.minZoom) ||
(this.mapVOptions.maxZoom && this.map.getZoom() > this.mapVOptions.maxZoom)
) {
return false;
}
return true;
}
_getResolution() {
var bounds = this.map.getBounds();
var dw = bounds.getEast() - bounds.getWest();
var rect = this.map.getCanvas().getBoundingClientRect();
var resolutionX = dw / rect.width;
// 一个像素是多少米
return getMeterPerMapUnit('DEGREE') * resolutionX;
}
_getCenterPixel() {
return this.map.project(new mapboxgl.LngLat(0, 0));
}
/**
* @function MapvLayer.prototype.addData
* @description 追加数据。
* @param {Object} data - 要追加的数据。
* @param {Object} options - 要追加的值。
*/
addData(data, options) {
this.renderer.addData(data, options);
}
/**
* @function MapvLayer.prototype.update
* @description 更新图层。
* @param {Object} opt - 待更新的数据。
* @param {Object} opt.data - mapv 数据集。
* @param {Object} opt.options - mapv 绘制参数。
*/
update(opt) {
this.renderer.update(opt);
}
/**
* @function MapvLayer.prototype.getData
* @description 获取数据。
* @returns {Mapv.DataSet} mapv 数据集。
*/
getData() {
if (this.renderer) {
this.dataSet = this.renderer.getData();
}
return this.dataSet;
}
/**
* @function MapvLayer.prototype.removeData
* @description 删除符合过滤条件的数据。
* @param {function} [filter] - 过滤条件。条件参数为数据项，返回值为 true,表示删除该元素；否则表示不删除。
* @example
* filter=function(data){
* if(data.id=="1"){
* return true
* }
* return false;
* }
*/
removeData(filter) {
this.renderer && this.renderer.removeData(filter);
}
/**
* @function MapvLayer.prototype.clearData
* @description 清除数据。
*/
clearData() {
this.renderer.clearData();
}
/**
* @function MapvLayer.prototype.show
* @description 显示该图层
*/
show() {
if (this.renderer) {
this.renderer.show();
}
return this;
}
/**
* @function MapvLayer.prototype.hide
* @description 隐藏该图层
*/
hide() {
if (this.renderer) {
this.renderer.hide();
}
return this;
}
/**
* @function MapvLayer.prototype.getTopLeft
* @description 获取左上的坐标。
*/
getTopLeft() {
var map = this.map;
var topLeft;
if (map) {
var bounds = map.getBounds();
topLeft = bounds.getNorthWest();
}
return topLeft;
}
/**
* @function MapvRenderer.prototype.bindEvent
* @description 绑定事件。
*/
bindEvent() {
var map = this.map;
if (this.mapVOptions.methods) {
if (this.mapVOptions.methods.click) {
map.on('click', this.renderer.clickEvent);
}
if (this.mapVOptions.methods.mousemove) {
map.on('mousemove', this.renderer.mousemoveEvent);
}
}
}
/**
* @function MapvRenderer.prototype.unbindEvent
* @description 解绑事件。
*/
unbindEvent() {
var map = this.map;
if (this.mapvOptions.methods) {
if (this.mapvOptions.methods.click) {
map.off('click', this.clickEvent);
}
if (this.mapvOptions.methods.mousemove) {
map.off('mousemove', this.mousemoveEvent);
}
}
}
/**
* @function MapvLayer.prototype.setVisibility
* @description 设置图层可见性。
* @param {boolean} [visibility] - 是否显示图层（当前地图的 resolution 在最大最小 resolution 之间）。
*/
setVisibility(visibility) {
if (visibility !== this.visibility) {
this.visibility = visibility;
if (visibility) {
this.show();
} else {
this.hide();
}
}
}
/**
* @function MapvLayer.prototype.setZIndex
* @description 设置 canvas 层级。
* @param {number} zIndex - canvas 层级。
*/
setZIndex(z) {
this.renderer.setZIndex(z);
}
}