scaleLimit is a {min, max} object

src/action/roamHelper.js

@@ -6,7 +6,7 @@ define(function (require) {
      * Calculate pan and zoom which from roamDetail model
      * @param {module:echarts/model/Model} roamDetailModel
      * @param {Object} payload
-     * @param {Array.<number>} [zoomLimit]
+     * @param {Object} [zoomLimit]
      */
     roamHelper.calcPanAndZoom = function (
         roamDetailModel, payload, zoomLimit
@@ -27,8 +27,8 @@ define(function (require) {
         if (zoom != null) {
             if (zoomLimit) {
                 zoom = Math.max(
-                    Math.min(previousZoom * zoom, zoomLimit[1]),
-                    zoomLimit[0]
+                    Math.min(previousZoom * zoom, zoomLimit.max),
+                    zoomLimit.min
                 ) / previousZoom;
             }
             var fixX = (payload.originX - panX) * (zoom - 1);

src/component/helper/RoamController.js

@@ -99,8 +99,8 @@ define(function (require) {
                 newZoom *= zoomDelta;
                 if (zoomLimit) {
                     newZoom = Math.max(
-                        Math.min(zoomLimit[1], newZoom),
-                        zoomLimit[0]
+                        Math.min(zoomLimit.max, newZoom),
+                        zoomLimit.min
                     );
                 }
                 var zoomScale = newZoom / this.zoom;
@@ -140,9 +140,10 @@ define(function (require) {
         this.rect = rect;
 
         /**
-         * @type {Array.<number>}
+         * { min: 1, max: 2 }
+         * @type {Object}
          */
-        this.zoomLimit = null;
+        this.zoomLimit;
 
         /**
          * @type {number}

src/coord/View.js

@@ -121,7 +121,7 @@ define(function (require) {
             var zoomLimit = this.zoomLimit;
             if (zoomLimit) {
                 zoom = Math.max(
-                    Math.min(zoom, zoomLimit[1]), zoomLimit[0]
+                    Math.min(zoom, zoomLimit.max), zoomLimit.min
                 );
             }
 

test/geoScatter.html

@@ -259,7 +259,10 @@
                         geo: {
                             map: 'china',
                             roam: true,
-                            scaleLimit: [1, 2],
+                            scaleLimit: {
+                                min: 1,
+                                max: 2
+                            },
                             roamDetail: {
                                 x: -200,
                                 y: -200,