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vendors/echarts/extension/bmap/BMapCoordSys.js

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+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]);
+        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();
+        /**
+         * 初始化
+         *
+         * @param {BMap.Map} map
+         * @override
+         */
+        Overlay.prototype.initialize = function (map) {
+            map.getPanes().labelPane.appendChild(this._root);
+            return this._root;
+        };
+        /**
+         * @override
+         */
+        Overlay.prototype.draw = function () {};
+
+        return Overlay;
+    }
+
+    BMapCoordSys.create = function (ecModel, api) {
+        var bmapCoordSys;
+        var root = api.getDom();
+
+        // TODO Dispose
+        ecModel.eachComponent('bmap', function (bmapModel) {
+            var viewportRoot = api.getZr().painter.getViewportRoot();
+            if (typeof BMap === 'undefined') {
+                throw new Error('BMap api is not loaded');
+            }
+            Overlay = Overlay || createOverlayCtor();
+            if (bmapCoordSys) {
+                throw new Error('Only one bmap component can exist');
+            }
+            if (!bmapModel.__bmap) {
+                // Not support IE8
+                var bmapRoot = root.querySelector('.ec-extension-bmap');
+                if (bmapRoot) {
+                    // Reset viewport left and top, which will be changed
+                    // in moving handler in BMapView
+                    viewportRoot.style.left = '0px';
+                    viewportRoot.style.top = '0px';
+                    root.removeChild(bmapRoot);
+                }
+                bmapRoot = document.createElement('div');
+                bmapRoot.style.cssText = 'width:100%;height:100%';
+                // Not support IE8
+                bmapRoot.classList.add('ec-extension-bmap');
+                root.appendChild(bmapRoot);
+                var bmap = bmapModel.__bmap = new BMap.Map(bmapRoot);
+
+                var overlay = new Overlay(viewportRoot);
+                bmap.addOverlay(overlay);
+            }
+            var bmap = bmapModel.__bmap;
+
+            // Set bmap options
+            // centerAndZoom before layout and render
+            var center = bmapModel.get('center');
+            var zoom = bmapModel.get('zoom');
+            if (center && zoom) {
+                var pt = new BMap.Point(center[0], center[1]);
+                bmap.centerAndZoom(pt, zoom);
+            }
+
+            bmapCoordSys = new BMapCoordSys(bmap, api);
+            bmapCoordSys.setMapOffset(bmapModel.__mapOffset || [0, 0]);
+            bmapModel.coordinateSystem = bmapCoordSys;
+        });
+
+        ecModel.eachSeries(function (seriesModel) {
+            if (seriesModel.get('coordinateSystem') === 'bmap') {
+                seriesModel.coordinateSystem = bmapCoordSys;
+            }
+        });
+    };
+
+    return BMapCoordSys;
+});