Check if not a left-click, then bail out of onStart

Author: Alex Vinober

src/components/dragelement/index.js

@@ -78,6 +78,10 @@ dragElement.init = function init(options) {
     element.ontouchstart = onStart;
 
     function onStart(e) {
+        if(e.button && e.button === 2) {    // right click
+            return;
+        }
+
         // make dragging and dragged into properties of gd
         // so that others can look at and modify them
         gd._dragged = false;

test/jasmine/tests/dragelement_test.js

@@ -122,6 +122,19 @@ describe('dragElement', function() {
         expect(countCoverSlip()).toEqual(0);
     });
 
+    it('should not add a cover slip div to the DOM when right click', function() {
+        function countCoverSlip() {
+            return d3.selectAll('.dragcover').size();
+        }
+
+        var options = { element: this.element, gd: this.gd };
+        dragElement.init(options);
+
+        options.element.onmousedown({button: 2})
+
+        expect(countCoverSlip()).toEqual(0);
+    });
+
     it('should fire off click event when down/up without dragging', function() {
         var options = { element: this.element, gd: this.gd };
         dragElement.init(options);