transforms: add support for date 3D z-axes

- using axisIds.getFromTrace !

Author: etpinard

src/transforms/filter.js

@@ -120,7 +120,7 @@ exports.calcTransform = function(gd, trace, opts) {
 
     if(!opts.enabled || !filtersrcOk) return;
 
-    var dataToCoord = getDataToCoordFunc(gd, filtersrc),
+    var dataToCoord = getDataToCoordFunc(gd, trace, filtersrc),
         filterFunc = getFilterFunc(opts, dataToCoord);
 
     var filterArr = Lib.nestedProperty(trace, filtersrc).get(),
@@ -157,8 +157,8 @@ exports.calcTransform = function(gd, trace, opts) {
     }
 };
 
-function getDataToCoordFunc(gd, filtersrc) {
-    var ax = axisIds.getFromId(gd, filtersrc);
+function getDataToCoordFunc(gd, trace, filtersrc) {
+    var ax = axisIds.getFromTrace(gd, trace, filtersrc);
 
     // if 'filtersrc' has corresponding axis
     // -> use setConvert method
@@ -168,7 +168,8 @@ function getDataToCoordFunc(gd, filtersrc) {
     // -> cast to String
     if(filtersrc === 'ids') return function(v) { return String(v); };
 
-    // otherwise -> cast to Number
+    // otherwise
+    // -> cast to Number
     return function(v) { return +v; };
 }
 

test/jasmine/tests/transform_filter_test.js

@@ -120,6 +120,23 @@ describe('filter transforms calc:', function() {
         expect(out[0].y).toEqual(base.y);
     });
 
+    it('filters should handle 3D *z* data', function() {
+        var out = _transform([Lib.extendDeep({}, base, {
+            type: 'scatter3d',
+            z: ['2015-07-20', '2016-08-01', '2016-09-01', '2016-10-21', '2016-12-02'],
+            transforms: [{
+                type: 'filter',
+                operation: '>',
+                value: '2016-10-01',
+                filtersrc: 'z'
+            }]
+        })]);
+
+        expect(out[0].x).toEqual([0, 1]);
+        expect(out[0].y).toEqual([1, 2]);
+        expect(out[0].z).toEqual(['2016-10-21', '2016-12-02']);
+    });
+
     it('filters should handle geographical *lon* data', function() {
         var trace0 = {
             type: 'scattergeo',