Support json and rows on flow api - #424

c3.js

@@ -4942,9 +4942,23 @@
         };
 
         c3.flow = function (args) {
-            var targets = convertDataToTargets(convertColumnsToData(args.columns), true), notfoundIds = [],
+            var targets, data, notfoundIds = [],
                 orgDataCount = getMaxDataCount(), dataCount, domain, baseTarget, baseValue, length = 0, tail = 0, diff, to;
 
+            if (args.json) {
+                data = convertJsonToData(args.json, args.keys);
+            }
+            else if (args.rows) {
+                data = convertRowsToData(args.rows);
+            }
+            else if (args.columns) {
+                data = convertColumnsToData(args.columns);
+            }
+            else {
+                return;
+            }
+            targets = convertDataToTargets(data, true);
+
             // Update/Add data
             c3.data.targets.forEach(function (t) {
                 var found = false, i, j;

htdocs/samples/api_flow.html

@@ -61,10 +61,11 @@
       setTimeout(function () {
         // Load only one data
         chart.flow({
-          columns: [
-            ['data1', 500, 200, 100],
-            ['data2', 100, null, 50],
-            ['data3', 200, null, null],
+          rows: [
+            ['data1', 'data2', 'data3'],
+            [500, 100, 200],
+            [200, null, null],
+            [100, 50, null] 
           ],
           duration: 1500,