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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 {SuperMap} from '../../SuperMap';
import {Point} from '../../commontypes/geometry/Point';
import {GeoText} from '../../commontypes/geometry/GeoText';
import {LonLat} from '../../commontypes/LonLat';
import {Util} from '../../commontypes/Util';
/**
* @class SuperMap.Feature.Theme
* @category Visualization Theme
* @classdesc 专题要素基类，此类不可实例化。
*/
export class Theme {
/**
* @function SuperMap.Feature.Theme.prototype.constructor
* @description 构造函数。
* @param {Object} data - 用户数据，用于生成可视化 shape，必设参数。
* @param {SuperMap.Layer.Theme} layer - 此专题要素所在图层，必设参数。
* @returns {SuperMap.Feature.Theme} 返回一个专题要素。
*/
constructor(data, layer) {
if (!data) {
return;
}
// layer 必须已经添加到地图, 且已初始化渲染器
if (!layer || !layer.map || !layer.renderer) {
return;
}
/**
* @member {string} SuperMap.Feature.Theme.prototype.id
* @description 专题要素唯一标识。
*/
this.id = Util.createUniqueID(this.CLASS_NAME + "_");
/**
* @member {SuperMap.LonLat} SuperMap.Feature.Theme.prototype.lonlat
* @description 专题要素地理参考位置。子类中必须根据用户数据（或地理位置参数）对其赋值。
*/
this.lonlat = null;
/**
* @member {Array} SuperMap.Feature.Theme.prototype.location
* @description 专题要素像素参考位置。通常由地理参考位置决定。长度为 2 的数组，第一个元素表示 x 坐标，第二个元素表示 y 坐标。
*/
this.location = [];
/**
* @readonly
* @member {Object} SuperMap.Feature.Theme.prototype.data
* @description 用户数据，用于生成可视化 shape，可在子类中规定数据格式或类型，如：<SuperMap.Feature.Vector>。
*/
this.data = data;
/**
* @readonly
* @member {Array} SuperMap.Feature.Theme.prototype.shapes
* @description 构成此专题要素的可视化图形对象数组，数组顺序控制渲染。
*/
this.shapes = [];
/**
* @readonly
* @member {SuperMap.Layer.Theme} SuperMap.Feature.Theme.prototype.layer
* @description 此专题要素所在专题图层。
*/
this.layer = layer;
this.CLASS_NAME = "SuperMap.Feature.Theme";
}
/**
* @function SuperMap.Feature.Theme.prototype.destroy
* @description 销毁专题要素。
*/
destroy() {
this.data = null;
this.id = null;
this.lonlat = null;
this.location = null;
this.shapes = null;
this.layer = null;
}
/**
* @function SuperMap.Feature.Theme.prototype.getLocalXY
* @description 地理坐标转为像素坐标。
* @param {(SuperMap.Geometry.Point|SuperMap.Geometry.GeoText|SuperMap.LonLat)} coordinate - 地理坐标点。
* @returns {Array} 长度为 2 的数组，第一个元素表示 x 坐标，第二个元素表示 y 坐标。
*/
getLocalXY(coordinate) {
var resolution = this.layer.map.getResolution();
var extent = this.layer.map.getExtent();
if (coordinate instanceof Point || coordinate instanceof GeoText) {
let x = (coordinate.x / resolution + (-extent.left / resolution));
let y = ((extent.top / resolution) - coordinate.y / resolution);
return [x, y];
} else if (coordinate instanceof LonLat) {
let x = (coordinate.lon / resolution + (-extent.left / resolution));
let y = ((extent.top / resolution) - coordinate.lat / resolution);
return [x, y];
} else {
return null;
}
}
}
SuperMap.Feature = SuperMap.Feature || {};
SuperMap.Feature.Theme = Theme;