emit plotly_relayout on mapbox map move

src/plots/mapbox/mapbox.js

@@ -12,6 +12,7 @@
 var mapboxgl = require('mapbox-gl');
 
 var Fx = require('../cartesian/graph_interact');
+var Lib = require('../../lib');
 var constants = require('./constants');
 var layoutAttributes = require('./layout_attributes');
 var createMapboxLayer = require('./layers');
@@ -97,8 +98,8 @@ proto.createMap = function(calcData, fullLayout, resolve, reject) {
 
     // clear navigation container
     var className = constants.controlContainerClassName,
-        controlContainer = this.div.getElementsByClassName(className)[0];
-    this.div.removeChild(controlContainer);
+        controlContainer = self.div.getElementsByClassName(className)[0];
+    self.div.removeChild(controlContainer);
 
     self.rejectOnError(reject);
 
@@ -109,13 +110,18 @@ proto.createMap = function(calcData, fullLayout, resolve, reject) {
         self.resolveOnRender(resolve);
     });
 
-    // keep track of pan / zoom in user layout
+    // keep track of pan / zoom in user layout and emit relayout event
     map.on('move', function() {
-        var center = map.getCenter();
-        opts._input.center = opts.center = { lon: center.lng, lat: center.lat };
-        opts._input.zoom = opts.zoom = map.getZoom();
-        opts._input.bearing = opts.bearing = map.getBearing();
-        opts._input.pitch = opts.pitch = map.getPitch();
+        var view = self.getView();
+
+        opts._input.center = opts.center = view.center;
+        opts._input.zoom = opts.zoom = view.zoom;
+        opts._input.bearing = opts.bearing = view.bearing;
+        opts._input.pitch = opts.pitch = view.pitch;
+
+        var update = {};
+        update[self.id] = Lib.extendFlat({}, view);
+        gd.emit('plotly_relayout', update);
     });
 
     map.on('mousemove', function(evt) {
@@ -368,6 +374,21 @@ proto.project = function(v) {
     return this.map.project(new mapboxgl.LngLat(v[0], v[1]));
 };
 
+// get map's current view values in plotly.js notation
+proto.getView = function() {
+    var map = this.map;
+
+    var mapCenter = map.getCenter(),
+        center = { lon: mapCenter.lng, lat: mapCenter.lat };
+
+    return {
+        center: center,
+        zoom: map.getZoom(),
+        bearing: map.getBearing(),
+        pitch: map.getPitch()
+    };
+};
+
 function convertStyleUrl(style) {
     var styleValues = layoutAttributes.style.values;
 

test/jasmine/tests/mapbox_test.js

@@ -576,6 +576,59 @@ describe('mapbox plots', function() {
         });
     });
 
+    it('should respond drag / scroll interactions', function(done) {
+        var updateData;
+
+        gd.on('plotly_relayout', function(eventData) {
+            updateData = eventData;
+        });
+
+        function _drag(p0, p1, cb) {
+            var promise = _mouseEvent('mousemove', p0, noop).then(function() {
+                return _mouseEvent('mousedown', p0, noop);
+            }).then(function() {
+                return _mouseEvent('mousemove', p1, noop);
+            }).then(function() {
+                return _mouseEvent('mouseup', p1, noop);
+            }).then(function() {
+                return _mouseEvent('mouseup', p1, noop);
+            }).then(cb);
+
+            return promise;
+        }
+
+        function assertLayout(center, zoom, opts) {
+            var mapInfo = getMapInfo(gd),
+                layout = gd.layout.mapbox;
+
+            expect([mapInfo.center.lng, mapInfo.center.lat]).toBeCloseToArray(center);
+            expect(mapInfo.zoom).toBeCloseTo(zoom);
+
+            expect([layout.center.lon, layout.center.lat]).toBeCloseToArray(center);
+            expect(layout.zoom).toBeCloseTo(zoom);
+
+            if(opts && opts.withUpdateData) {
+                var mapboxUpdate = updateData.mapbox;
+
+                expect([mapboxUpdate.center.lon, mapboxUpdate.center.lat]).toBeCloseToArray(center);
+                expect(mapboxUpdate.zoom).toBeCloseTo(zoom);
+            }
+        }
+
+        assertLayout([-4.710, 19.475], 1.234);
+
+        var p1 = [pointPos[0] + 50, pointPos[1] - 20];
+
+        _drag(pointPos, p1, function() {
+            assertLayout([-19.651, 13.751], 1.234, { withUpdateData: true });
+
+        })
+        .then(done);
+
+        // TODO test scroll
+
+    });
+
     it('should respond to click interactions by', function(done) {
         var ptData;
 
@@ -610,45 +663,6 @@ describe('mapbox plots', function() {
         .then(done);
     });
 
-    it('should respond drag / scroll interactions', function(done) {
-        function _drag(p0, p1, cb) {
-            var promise = _mouseEvent('mousemove', p0, noop).then(function() {
-                return _mouseEvent('mousedown', p0, noop);
-            }).then(function() {
-                return _mouseEvent('mousemove', p1, noop);
-            }).then(function() {
-                return _mouseEvent('mouseup', p1, cb);
-            });
-
-            return promise;
-        }
-
-        function assertLayout(center, zoom) {
-            var mapInfo = getMapInfo(gd),
-                layout = gd.layout.mapbox;
-
-            expect([mapInfo.center.lng, mapInfo.center.lat])
-                .toBeCloseToArray(center);
-            expect(mapInfo.zoom).toBeCloseTo(zoom);
-
-            expect([layout.center.lon, layout.center.lat])
-                .toBeCloseToArray(center);
-            expect(layout.zoom).toBeCloseTo(zoom);
-        }
-
-        assertLayout([-4.710, 19.475], 1.234);
-
-        var p1 = [pointPos[0] + 50, pointPos[1] - 20];
-
-        _drag(pointPos, p1, function() {
-            assertLayout([-19.651, 13.751], 1.234);
-        })
-        .then(done);
-
-        // TODO test scroll
-
-    });
-
     function getMapInfo(gd) {
         var subplot = gd._fullLayout.mapbox._subplot,
             map = subplot.map;