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MapVLayer.js
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/* Copyright© 2000 - 2021 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 L from "leaflet";
import '../core/Base';
import {MapVRenderer} from "./mapv/MapVRenderer";
import Attributions from '../core/Attributions'
/**
* @class L.supermap.mapVLayer
* @classdesc MapV 图层。
* @category Visualization MapV
* @extends {L.Layer}
* @param {mapv.DataSet} dataSet - MapV 图层数据集。
* @param {Object} mapVOptions - MapV 图层参数。
* @param {Object} options - 参数。
* @param {string} [options.attributionPrefix] - 版权信息前缀。
* @param {string} [options.attribution='© 2018 百度 MapV'] - 版权信息。
* @fires L.supermap.mapVLayer#loaded
*/
export var MapVLayer = L.Layer.extend({
options: {
attributionPrefix: null,
attribution: Attributions.MapV.attribution
},
initialize: function (dataSet, mapVOptions, options) {
options = options || {};
this.dataSet = dataSet || {};
this.mapVOptions = mapVOptions || {};
this.render = this.render.bind(this);
L.Util.setOptions(this, options);
if (this.options.attributionPrefix) {
this.options.attribution = this.options.attributionPrefix + this.options.attribution;
}
this.canvas = this._createCanvas();
L.stamp(this);
},
/**
* @private
* @function L.supermap.mapVLayer.prototype.onAdd
* @description 添加地图图层。
* @param {L.Map} map - 要添加的地图。
*/
onAdd: function (map) {
this._map = map;
var overlayPane = this.getPane();
var container = this.container = L.DomUtil.create("div", "leaflet-layer leaflet-zoom-animated", overlayPane);
container.appendChild(this.canvas);
var size = map.getSize();
container.style.width = size.x + "px";
container.style.height = size.y + "px";
this.renderer = new MapVRenderer(map, this, this.dataSet, this.mapVOptions);
this.draw();
/**
* @event L.supermap.mapVLayer#loaded
* @description 图层添加完成之后触发。
*/
this.fire("loaded");
},
// _hide: function () {
// this.canvas.style.display = 'none';
// },
// _show: function () {
// this.canvas.style.display = 'block';
// },
/**
* @private
* @function L.supermap.mapVLayer.prototype.onRemove
* @description 删除地图图层。
*/
onRemove: function () {
L.DomUtil.remove(this.container);
this.renderer.destroy();
},
/**
* @function L.supermap.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: function (data, options) {
this.renderer.addData(data, options);
},
/**
* @function L.supermap.mapVLayer.prototype.update
* @description 更新图层。
* @param {Object} opt - 待更新的数据。
* @param {Object} data - mapv 数据集。
* @param {Object} options - mapv 绘制参数。
*/
update: function (opt) {
this.renderer.update(opt);
},
/**
* @function L.supermap.mapVLayer.prototype.getData
* @description 获取数据。
* @returns {mapv.DataSet} mapv 数据集。
*/
getData: function () {
if (this.renderer) {
this.dataSet = this.renderer.getData();
}
return this.dataSet;
},
/**
* @function L.supermap.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: function (filter) {
this.renderer && this.renderer.removeData(filter);
},
/**
* @function L.supermap.mapVLayer.prototype.clearData
* @description 清除数据。
*/
clearData: function () {
this.renderer.clearData();
},
/**
* @function L.supermap.mapVLayer.prototype.draw
* @description 绘制图层。
*/
draw: function () {
return this._reset();
},
/**
* @function L.supermap.mapVLayer.prototype.setZIndex
* @description 设置 canvas 层级。
* @param {number} zIndex - canvas 层级。
*/
setZIndex: function (zIndex) {
this.canvas.style.zIndex = zIndex;
},
/**
* @function L.supermap.mapVLayer.prototype.render
* @description 渲染。
*/
render: function () {
this.renderer._canvasUpdate();
},
/**
* @function L.supermap.mapVLayer.prototype.getCanvas
* @description 获取 canvas。
* @returns {HTMLElement} 返回 mapV 图层包含的 canvas 对象。
*/
getCanvas: function () {
return this.canvas;
},
/**
* @function L.supermap.mapVLayer.prototype.getContainer
* @description 获取容器。
* @returns {HTMLElement} 返回包含 mapV 图层的 dom 对象。
*/
getContainer: function () {
return this.container;
},
/**
* @function L.supermap.mapVLayer.prototype.getTopLeft
* @description 获取左上角坐标。
* @returns {L.Bounds} 返回左上角坐标。
*/
getTopLeft: function () {
var map = this._map;
var topLeft;
if (map) {
var bounds = map.getBounds();
topLeft = bounds.getNorthWest();
}
return topLeft;
},
_createCanvas: function () {
var canvas = document.createElement('canvas');
canvas.style.position = 'absolute';
canvas.style.top = 0 + "px";
canvas.style.left = 0 + "px";
canvas.style.pointerEvents = "none";
canvas.style.zIndex = this.options.zIndex || 600;
var global$2 = typeof window === 'undefined' ? {} : window;
var devicePixelRatio = this.devicePixelRatio = global$2.devicePixelRatio || 1;
if (!this.mapVOptions.context || this.mapVOptions.context === '2d') {
canvas.getContext('2d').scale(devicePixelRatio, devicePixelRatio);
}
return canvas;
},
_resize: function () {
var canvas = this.canvas;
if (!canvas) {
return;
}
var map = this._map;
var size = map.getSize();
canvas.width = size.x;
canvas.height = size.y;
canvas.style.width = size.x + 'px';
canvas.style.height = size.y + 'px';
var bounds = map.getBounds();
var topLeft = map.latLngToLayerPoint(bounds.getNorthWest());
L.DomUtil.setPosition(canvas, topLeft);
},
_reset: function () {
this._resize();
this._render()
},
redraw: function () {
this._resize();
this._render()
},
_render: function () {
this.render();
}
});
export var mapVLayer = function (dataSet, mapVOptions, options) {
return new MapVLayer(dataSet, mapVOptions, options);
};
L.supermap.mapVLayer = mapVLayer;