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META-INF.assets.rjzjh.echarts.src.coord.geo.Geo.js Maven / Gradle / Ivy
define(function (require) {
var parseGeoJson = require('./parseGeoJson');
var zrUtil = require('zrender/core/util');
var BoundingRect = require('zrender/core/BoundingRect');
var View = require('../View');
// Geo fix functions
var geoFixFuncs = [
require('./fix/nanhai'),
require('./fix/textCoord'),
require('./fix/geoCoord')
];
/**
* [Geo description]
* @param {string} name Geo name
* @param {string} map Map type
* @param {Object} geoJson
* @param {Object} [specialAreas]
* Specify the positioned areas by left, top, width, height
* @param {Object.} [nameMap]
* Specify name alias
*/
function Geo(name, map, geoJson, specialAreas, nameMap) {
View.call(this, name);
/**
* Map type
* @type {string}
*/
this.map = map;
this._nameCoordMap = {};
this.loadGeoJson(geoJson, specialAreas, nameMap);
}
Geo.prototype = {
constructor: Geo,
type: 'geo',
/**
* @param {Array.}
* @readOnly
*/
dimensions: ['lng', 'lat'],
/**
* If contain given lng,lat coord
* @param {Array.}
* @readOnly
*/
containCoord: function (coord) {
var regions = this.regions;
for (var i = 0; i < regions.length; i++) {
if (regions[i].contain(coord)) {
return true;
}
}
return false;
},
/**
* @param {Object} geoJson
* @param {Object} [specialAreas]
* Specify the positioned areas by left, top, width, height
* @param {Object.} [nameMap]
* Specify name alias
*/
loadGeoJson: function (geoJson, specialAreas, nameMap) {
// https://jsperf.com/try-catch-performance-overhead
try {
this.regions = geoJson ? parseGeoJson(geoJson) : [];
}
catch (e) {
throw 'Invalid geoJson format\n' + e;
}
specialAreas = specialAreas || {};
nameMap = nameMap || {};
var regions = this.regions;
var regionsMap = {};
for (var i = 0; i < regions.length; i++) {
var regionName = regions[i].name;
// Try use the alias in nameMap
regionName = nameMap[regionName] || regionName;
regions[i].name = regionName;
regionsMap[regionName] = regions[i];
// Add geoJson
this.addGeoCoord(regionName, regions[i].center);
// Some area like Alaska in USA map needs to be tansformed
// to look better
var specialArea = specialAreas[regionName];
if (specialArea) {
regions[i].transformTo(
specialArea.left, specialArea.top, specialArea.width, specialArea.height
);
}
}
this._regionsMap = regionsMap;
this._rect = null;
zrUtil.each(geoFixFuncs, function (fixFunc) {
fixFunc(this);
}, this);
},
// Overwrite
transformTo: function (x, y, width, height) {
var rect = this.getBoundingRect();
rect = rect.clone();
// Longitute is inverted
rect.y = -rect.y - rect.height;
var viewTransform = this._viewTransform;
viewTransform.transform = rect.calculateTransform(
new BoundingRect(x, y, width, height)
);
viewTransform.decomposeTransform();
var scale = viewTransform.scale;
scale[1] = -scale[1];
viewTransform.updateTransform();
this._updateTransform();
},
/**
* @param {string} name
* @return {module:echarts/coord/geo/Region}
*/
getRegion: function (name) {
return this._regionsMap[name];
},
getRegionByCoord: function (coord) {
var regions = this.regions;
for (var i = 0; i < regions.length; i++) {
if (regions[i].contain(coord)) {
return regions[i];
}
}
},
/**
* Add geoCoord for indexing by name
* @param {string} name
* @param {Array.} geoCoord
*/
addGeoCoord: function (name, geoCoord) {
this._nameCoordMap[name] = geoCoord;
},
/**
* Get geoCoord by name
* @param {string} name
* @return {Array.}
*/
getGeoCoord: function (name) {
return this._nameCoordMap[name];
},
// Overwrite
getBoundingRect: function () {
if (this._rect) {
return this._rect;
}
var rect;
var regions = this.regions;
for (var i = 0; i < regions.length; i++) {
var regionRect = regions[i].getBoundingRect();
rect = rect || regionRect.clone();
rect.union(regionRect);
}
// FIXME Always return new ?
return (this._rect = rect || new BoundingRect(0, 0, 0, 0));
},
/**
* Convert series data to a list of points
* @param {module:echarts/data/List} data
* @param {boolean} stack
* @return {Array}
* Return list of points. For example:
* `[[10, 10], [20, 20], [30, 30]]`
*/
dataToPoints: function (data) {
var item = [];
return data.mapArray(['lng', 'lat'], function (lon, lat) {
item[0] = lon;
item[1] = lat;
return this.dataToPoint(item);
}, this);
},
// Overwrite
/**
* @param {string|Array.} data
* @return {Array.}
*/
dataToPoint: function (data) {
if (typeof data === 'string') {
// Map area name to geoCoord
data = this.getGeoCoord(data);
}
if (data) {
return View.prototype.dataToPoint.call(this, data);
}
}
};
zrUtil.mixin(Geo, View);
return Geo;
});
