extension/bmap/BMapCoordSys.js

这里只显示每个文件的开头 60 行。登录后可以解锁完整代码。

微信扫码关注公众号，代码整理好后第一时间通知你。

define(function (require) {

    var echarts = require('echarts');

    function BMapCoordSys(bmap, api) {
        this._bmap = bmap;
        this.dimensions = ['lng', 'lat'];
        this._mapOffset = [0, 0];

        this._api = api;
    }

    BMapCoordSys.prototype.dimensions = ['lng', 'lat'];

    BMapCoordSys.prototype.setMapOffset = function (mapOffset) {
        this._mapOffset = mapOffset;
    };

    BMapCoordSys.prototype.getBMap = function () {
        return this._bmap;
    };

    BMapCoordSys.prototype.dataToPoint = function (data) {
        var point = new BMap.Point(data[0], data[1]);
        // TODO pointToOverlayPixel is toooooooo slow, cache the transform
        var px = this._bmap.pointToOverlayPixel(point);
        var mapOffset = this._mapOffset;
        return [px.x - mapOffset[0], px.y - mapOffset[1]];
    };

    BMapCoordSys.prototype.pointToData = function (pt) {
        var mapOffset = this._mapOffset;
        var pt = this._bmap.overlayPixelToPoint({
            x: pt[0] + mapOffset[0],
            y: pt[1] + mapOffset[1]
        });
        return [pt.lng, pt.lat];
    };

    BMapCoordSys.prototype.getViewRect = function () {
        var api = this._api;
        return new echarts.graphic.BoundingRect(0, 0, api.getWidth(), api.getHeight());
    };

    BMapCoordSys.prototype.getRoamTransform = function () {
        return echarts.matrix.create();
    };

    var Overlay;

    // For deciding which dimensions to use when creating list data
    BMapCoordSys.dimensions = BMapCoordSys.prototype.dimensions;

    function createOverlayCtor() {
        function Overlay(root) {
            this._root = root;
        }

        Overlay.prototype = new BMap.Overlay();
        /**