Add support for tooltip ordering, fix #1050 #1764 [REPOST PR #1813] (#2070)

Updates PR #1813 by @panthony.

c3.js

@@ -88,6 +88,9 @@ var isValue = function (v) {
 var isFunction = function (o) {
     return typeof o === 'function';
 };
+var isArray = function (o) {
+    return Array.isArray(o);
+};
 var isString = function (o) {
     return typeof o === 'string';
 };
@@ -853,8 +856,6 @@ var c3_chart_fn;
 var c3_chart_internal_fn;
 var c3_chart_internal_axis_fn;
 
-var d3 = window.d3 ? window.d3 : typeof require !== 'undefined' ? require("d3") : undefined;
-
 function API(owner) {
     this.owner = owner;
 }
@@ -895,7 +896,7 @@ function Chart(config) {
 
 function ChartInternal(api) {
     var $$ = this;
-    $$.d3 = d3;
+    $$.d3 = window.d3 ? window.d3 : typeof require !== 'undefined' ? require("d3") : undefined;
     $$.api = api;
     $$.config = $$.getDefaultConfig();
     $$.data = {};
@@ -4586,6 +4587,7 @@ c3_chart_internal_fn.getDefaultConfig = function () {
         // tooltip - show when mouseover on each data
         tooltip_show: true,
         tooltip_grouped: true,
+        tooltip_order: undefined,
         tooltip_format_title: undefined,
         tooltip_format_name: undefined,
         tooltip_format_value: undefined,
@@ -5107,7 +5109,11 @@ c3_chart_internal_fn.orderTargets = function (targets) {
         });
     } else if (isFunction(config.data_order)) {
         targets.sort(config.data_order);
-    } // TODO: accept name array for order
+    } else if (isArray(config.data_order)) {
+        targets.sort(function (t1, t2) {
+            return config.data_order.indexOf(t1.id) - config.data_order.indexOf(t2.id);
+        });
+    }
     return targets;
 };
 c3_chart_internal_fn.filterByX = function (targets, x) {
@@ -7968,31 +7974,85 @@ c3_chart_internal_fn.initTooltip = function () {
             .style("display", "block");
     }
 };
+c3_chart_internal_fn.getTooltipSortFunction = function() {
+    var $$ = this, config = $$.config;
+
+    if (config.data_groups.length === 0 || config.tooltip_order !== undefined) {
+        // if data are not grouped or if an order is specified
+        // for the tooltip values we sort them by their values
+
+        var order = config.tooltip_order;
+        if (order === undefined) {
+            order = config.data_order;
+        }
+
+        var valueOf = function(obj) {
+            return obj ? obj.value : null;
+        };
+
+        // if data are not grouped, we sort them by their value
+        if (isString(order) && order.toLowerCase() === 'asc') {
+            return function(a, b) {
+                return valueOf(a) - valueOf(b);
+            };
+        } else if (isString(order) && order.toLowerCase() === 'desc') {
+            return function (a, b) {
+                return valueOf(b) - valueOf(a);
+            };
+        } else if (isFunction(order)) {
+
+            // if the function is from data_order we need
+            // to wrap the returned function in order to format
+            // the sorted value to the expected format
+
+            var sortFunction = order;
+
+            if (config.tooltip_order === undefined) {
+                sortFunction = function (a, b) {
+                    return order(a ? {
+                        id: a.id,
+                        values: [ a ]
+                    } : null, b ? {
+                        id: b.id,
+                        values: [ b ]
+                    } : null);
+                };
+            }
+
+            return sortFunction;
+
+        } else if (isArray(order)) {
+            return function(a, b) {
+                return order.indexOf(a.id) - order.indexOf(b.id);
+            };
+        }
+    } else {
+        // if data are grouped, we follow the order of grouped targets
+        var ids = $$.orderTargets($$.data.targets).map(function(i) {
+            return i.id;
+        });
+
+        // if it was either asc or desc we need to invert the order
+        // returned by orderTargets
+        if ($$.isOrderAsc() || $$.isOrderDesc()) {
+            ids = ids.reverse();
+        }
+
+        return function(a, b) {
+            return ids.indexOf(a.id) - ids.indexOf(b.id);
+        };
+    }
+};
 c3_chart_internal_fn.getTooltipContent = function (d, defaultTitleFormat, defaultValueFormat, color) {
     var $$ = this, config = $$.config,
         titleFormat = config.tooltip_format_title || defaultTitleFormat,
         nameFormat = config.tooltip_format_name || function (name) { return name; },
         valueFormat = config.tooltip_format_value || defaultValueFormat,
-        text, i, title, value, name, bgcolor,
-        orderAsc = $$.isOrderAsc();
+        text, i, title, value, name, bgcolor;
 
-    if (config.data_groups.length === 0) {
-        d.sort(function(a, b){
-            var v1 = a ? a.value : null, v2 = b ? b.value : null;
-            return orderAsc ? v1 - v2 : v2 - v1;
-        });
-    } else {
-        var ids = $$.orderTargets($$.data.targets).map(function (i) {
-            return i.id;
-        });
-        d.sort(function(a, b) {
-            var v1 = a ? a.value : null, v2 = b ? b.value : null;
-            if (v1 > 0 && v2 > 0) {
-                v1 = a ? ids.indexOf(a.id) : null;
-                v2 = b ? ids.indexOf(b.id) : null;
-            }
-            return orderAsc ? v1 - v2 : v2 - v1;
-        });
+    var tooltipSortFunction = this.getTooltipSortFunction();
+    if(tooltipSortFunction) {
+        d.sort(tooltipSortFunction);
     }
 
     for (i = 0; i < d.length; i++) {

c3.min.css

@@ -1 +1 @@
-.c3 svg{font:10px sans-serif;-webkit-tap-highlight-color:transparent}.c3 line,.c3 path{fill:none;stroke:#000}.c3 text{-webkit-user-select:none;-moz-user-select:none;user-select:none}.c3-bars path,.c3-event-rect,.c3-legend-item-tile,.c3-xgrid-focus,.c3-ygrid{shape-rendering:crispEdges}.c3-chart-arc path{stroke:#fff}.c3-chart-arc text{fill:#fff;font-size:13px}.c3-grid line{stroke:#aaa}.c3-grid text{fill:#aaa}.c3-xgrid,.c3-ygrid{stroke-dasharray:3 3}.c3-text.c3-empty{fill:gray;font-size:2em}.c3-line{stroke-width:1px}.c3-circle._expanded_{stroke-width:1px;stroke:#fff}.c3-selected-circle{fill:#fff;stroke-width:2px}.c3-bar{stroke-width:0}.c3-bar._expanded_{fill-opacity:.75}.c3-target.c3-focused{opacity:1}.c3-target.c3-focused path.c3-line,.c3-target.c3-focused path.c3-step{stroke-width:2px}.c3-target.c3-defocused{opacity:.3!important}.c3-region{fill:#4682b4;fill-opacity:.1}.c3-brush .extent{fill-opacity:.1}.c3-legend-item{font-size:12px}.c3-legend-item-hidden{opacity:.15}.c3-legend-background{opacity:.75;fill:#fff;stroke:#d3d3d3;stroke-width:1}.c3-title{font:14px sans-serif}.c3-tooltip-container{z-index:10}.c3-tooltip{border-collapse:collapse;border-spacing:0;background-color:#fff;empty-cells:show;-webkit-box-shadow:7px 7px 12px -9px #777;-moz-box-shadow:7px 7px 12px -9px #777;box-shadow:7px 7px 12px -9px #777;opacity:.9}.c3-tooltip tr{border:1px solid #CCC}.c3-tooltip th{background-color:#aaa;font-size:14px;padding:2px 5px;text-align:left;color:#FFF}.c3-tooltip td{font-size:13px;padding:3px 6px;background-color:#fff;border-left:1px dotted #999}.c3-tooltip td>span{display:inline-block;width:10px;height:10px;margin-right:6px}.c3-tooltip td.value{text-align:right}.c3-area{stroke-width:0;opacity:.2}.c3-chart-arcs-title{dominant-baseline:middle;font-size:1.3em}.c3-chart-arcs .c3-chart-arcs-background{fill:#e0e0e0;stroke:none}.c3-chart-arcs .c3-chart-arcs-gauge-unit{fill:#000;font-size:16px}.c3-chart-arcs .c3-chart-arcs-gauge-max,.c3-chart-arcs .c3-chart-arcs-gauge-min{fill:#777}.c3-chart-arc .c3-gauge-value{fill:#000}
+.c3 svg{font:10px sans-serif;-webkit-tap-highlight-color:transparent}.c3 line,.c3 path{fill:none;stroke:#000}.c3 text{-webkit-user-select:none;-moz-user-select:none;user-select:none}.c3-bars path,.c3-event-rect,.c3-legend-item-tile,.c3-xgrid-focus,.c3-ygrid{shape-rendering:crispEdges}.c3-chart-arc path{stroke:#fff}.c3-chart-arc text{fill:#fff;font-size:13px}.c3-grid line{stroke:#aaa}.c3-grid text{fill:#aaa}.c3-xgrid,.c3-ygrid{stroke-dasharray:3 3}.c3-text.c3-empty{fill:grey;font-size:2em}.c3-line{stroke-width:1px}.c3-circle._expanded_{stroke-width:1px;stroke:#fff}.c3-selected-circle{fill:#fff;stroke-width:2px}.c3-bar{stroke-width:0}.c3-bar._expanded_{fill-opacity:.75}.c3-target.c3-focused{opacity:1}.c3-target.c3-focused path.c3-line,.c3-target.c3-focused path.c3-step{stroke-width:2px}.c3-target.c3-defocused{opacity:.3!important}.c3-region{fill:#4682b4;fill-opacity:.1}.c3-brush .extent{fill-opacity:.1}.c3-legend-item{font-size:12px}.c3-legend-item-hidden{opacity:.15}.c3-legend-background{opacity:.75;fill:#fff;stroke:#d3d3d3;stroke-width:1}.c3-title{font:14px sans-serif}.c3-tooltip-container{z-index:10}.c3-tooltip{border-collapse:collapse;border-spacing:0;background-color:#fff;empty-cells:show;-webkit-box-shadow:7px 7px 12px -9px #777;-moz-box-shadow:7px 7px 12px -9px #777;box-shadow:7px 7px 12px -9px #777;opacity:.9}.c3-tooltip tr{border:1px solid #ccc}.c3-tooltip th{background-color:#aaa;font-size:14px;padding:2px 5px;text-align:left;color:#fff}.c3-tooltip td{font-size:13px;padding:3px 6px;background-color:#fff;border-left:1px dotted #999}.c3-tooltip td>span{display:inline-block;width:10px;height:10px;margin-right:6px}.c3-tooltip td.value{text-align:right}.c3-area{stroke-width:0;opacity:.2}.c3-chart-arcs-title{dominant-baseline:middle;font-size:1.3em}.c3-chart-arcs .c3-chart-arcs-background{fill:#e0e0e0;stroke:none}.c3-chart-arcs .c3-chart-arcs-gauge-unit{fill:#000;font-size:16px}.c3-chart-arcs .c3-chart-arcs-gauge-max{fill:#777}.c3-chart-arcs .c3-chart-arcs-gauge-min{fill:#777}.c3-chart-arc .c3-gauge-value{fill:#000}

spec/tooltip-spec.js

@@ -2,16 +2,20 @@ describe('c3 chart tooltip', function () {
     'use strict';
 
     var chart;
-    var tooltipConfiguration;
+    var tooltipConfiguration = {};
+    var dataOrder = 'desc';
+    var dataGroups;
 
     var args = function () {
         return {
             data: {
                 columns: [
-                    ['data1', 30, 200, 100, 400, 150, 250],
-                    ['data2', 50, 20, 10, 40, 15, 25],
-                    ['data3', 150, 120, 110, 140, 115, 125]
+                    ['data1', 30, 200, 100, 400, 150, 250], // 1130
+                    ['data2', 50, 20, 10, 40, 15, 25],      // 160
+                    ['data3', 150, 120, 110, 140, 115, 125] // 760
                 ],
+                order: dataOrder,
+                groups: dataGroups,
             },
             tooltip: tooltipConfiguration
         };
@@ -19,6 +23,8 @@ describe('c3 chart tooltip', function () {
 
     beforeEach(function (done) {
         chart = window.initChart(chart, args(), done);
+        dataOrder = 'desc';
+        dataGroups = undefined;
     });
 
     describe('tooltip position', function () {
@@ -118,4 +124,321 @@ describe('c3 chart tooltip', function () {
             }
         });
     });
+
+    describe('tooltip with data_order as desc with grouped data', function() {
+        beforeAll(function() {
+            dataOrder = 'desc';
+            dataGroups = [ [ 'data1', 'data2', 'data3' ]];
+        });
+
+        it('should display each data in descending order', function() {
+            window.setMouseEvent(chart, 'mousemove', 100, 100, d3.select('.c3-event-rect-2').node());
+
+            var classes = d3.selectAll('.c3-tooltip tr')[0].map(function(node) {
+                return node.className;
+            });
+
+            expect(classes[0]).toBe(''); // header
+            expect(classes[1]).toBe('c3-tooltip-name--data1'); // 1130
+            expect(classes[2]).toBe('c3-tooltip-name--data3'); // 760
+            expect(classes[3]).toBe('c3-tooltip-name--data2'); // 160
+        });
+    });
+
+    describe('tooltip with data_order as asc with grouped data', function() {
+        beforeAll(function() {
+            dataOrder = 'asc';
+            dataGroups = [ [ 'data1', 'data2', 'data3' ]];
+        });
+
+        it('should display each data in ascending order', function() {
+            window.setMouseEvent(chart, 'mousemove', 100, 100, d3.select('.c3-event-rect-2').node());
+
+            var classes = d3.selectAll('.c3-tooltip tr')[0].map(function(node) {
+                return node.className;
+            });
+
+            expect(classes[0]).toBe(''); // header
+            expect(classes[1]).toBe('c3-tooltip-name--data2'); // 160
+            expect(classes[2]).toBe('c3-tooltip-name--data3'); // 760
+            expect(classes[3]).toBe('c3-tooltip-name--data1'); // 1130
+        });
+    });
+
+    describe('tooltip with data_order as NULL with grouped data', function() {
+        beforeAll(function() {
+            dataOrder = null;
+            dataGroups = [ [ 'data1', 'data2', 'data3' ]];
+        });
+
+        it('should display each data in given order', function() {
+            window.setMouseEvent(chart, 'mousemove', 100, 100, d3.select('.c3-event-rect-2').node());
+
+            var classes = d3.selectAll('.c3-tooltip tr')[0].map(function(node) {
+                return node.className;
+            });
+
+            expect(classes[0]).toBe(''); // header
+            expect(classes[1]).toBe('c3-tooltip-name--data1');
+            expect(classes[2]).toBe('c3-tooltip-name--data2');
+            expect(classes[3]).toBe('c3-tooltip-name--data3');
+        });
+    });
+
+    describe('tooltip with data_order as Function with grouped data', function() {
+        beforeAll(function() {
+            var order = [ 'data2', 'data1', 'data3' ];
+            dataOrder = function(data1, data2) {
+                return order.indexOf(data1.id) - order.indexOf(data2.id);
+            };
+            dataGroups = [ [ 'data1', 'data2', 'data3' ]];
+        });
+
+        it('should display each data in order given by function', function() {
+            window.setMouseEvent(chart, 'mousemove', 100, 100, d3.select('.c3-event-rect-2').node());
+
+            var classes = d3.selectAll('.c3-tooltip tr')[0].map(function(node) {
+                return node.className;
+            });
+
+            expect(classes[0]).toBe(''); // header
+            expect(classes[1]).toBe('c3-tooltip-name--data2');
+            expect(classes[2]).toBe('c3-tooltip-name--data1');
+            expect(classes[3]).toBe('c3-tooltip-name--data3');
+        });
+    });
+
+    describe('tooltip with data_order as Array with grouped data', function() {
+        beforeAll(function() {
+            dataOrder = [ 'data2', 'data1', 'data3' ];
+            dataGroups = [ [ 'data1', 'data2', 'data3' ]];
+        });
+
+        it('should display each data in order given by array', function() {
+            window.setMouseEvent(chart, 'mousemove', 100, 100, d3.select('.c3-event-rect-2').node());
+
+            var classes = d3.selectAll('.c3-tooltip tr')[0].map(function(node) {
+                return node.className;
+            });
+
+            expect(classes[0]).toBe(''); // header
+            expect(classes[1]).toBe('c3-tooltip-name--data2');
+            expect(classes[2]).toBe('c3-tooltip-name--data1');
+            expect(classes[3]).toBe('c3-tooltip-name--data3');
+        });
+    });
+
+    describe('tooltip with data_order as desc with un-grouped data', function() {
+        beforeAll(function() {
+            dataOrder = 'desc';
+        });
+
+        it('should display each tooltip value descending order', function() {
+            window.setMouseEvent(chart, 'mousemove', 100, 100, d3.select('.c3-event-rect-2').node());
+
+            var classes = d3.selectAll('.c3-tooltip tr')[0].map(function(node) {
+                return node.className;
+            });
+
+            expect(classes[0]).toBe(''); // header
+            expect(classes[1]).toBe('c3-tooltip-name--data3'); // 110
+            expect(classes[2]).toBe('c3-tooltip-name--data1'); // 100
+            expect(classes[3]).toBe('c3-tooltip-name--data2'); // 10
+        });
+    });
+
+    describe('tooltip with data_order as asc with un-grouped data', function() {
+        beforeAll(function() {
+            dataOrder = 'asc';
+        });
+
+        it('should display each tooltip value in ascending order', function() {
+            window.setMouseEvent(chart, 'mousemove', 100, 100, d3.select('.c3-event-rect-2').node());
+
+            var classes = d3.selectAll('.c3-tooltip tr')[0].map(function(node) {
+                return node.className;
+            });
+
+            expect(classes[0]).toBe(''); // header
+            expect(classes[1]).toBe('c3-tooltip-name--data2'); // 10
+            expect(classes[2]).toBe('c3-tooltip-name--data1'); // 100
+            expect(classes[3]).toBe('c3-tooltip-name--data3'); // 110
+        });
+    });
+
+    describe('tooltip with data_order as NULL with un-grouped data', function() {
+        beforeAll(function() {
+            dataOrder = null;
+        });
+
+        it('should display each tooltip value in given data order', function() {
+            window.setMouseEvent(chart, 'mousemove', 100, 100, d3.select('.c3-event-rect-2').node());
+
+            var classes = d3.selectAll('.c3-tooltip tr')[0].map(function(node) {
+                return node.className;
+            });
+
+            expect(classes[0]).toBe(''); // header
+            expect(classes[1]).toBe('c3-tooltip-name--data1');
+            expect(classes[2]).toBe('c3-tooltip-name--data2');
+            expect(classes[3]).toBe('c3-tooltip-name--data3');
+        });
+    });
+
+    describe('tooltip with data_order as Function with un-grouped data', function() {
+        beforeAll(function() {
+            var order = [ 'data2', 'data1', 'data3' ];
+            dataOrder = function(data1, data2) {
+                return order.indexOf(data1.id) - order.indexOf(data2.id);
+            };
+        });
+
+        it('should display each tooltip value in data order given by function', function() {
+            window.setMouseEvent(chart, 'mousemove', 100, 100, d3.select('.c3-event-rect-2').node());
+
+            var classes = d3.selectAll('.c3-tooltip tr')[0].map(function(node) {
+                return node.className;
+            });
+
+            expect(classes[0]).toBe(''); // header
+            expect(classes[1]).toBe('c3-tooltip-name--data2');
+            expect(classes[2]).toBe('c3-tooltip-name--data1');
+            expect(classes[3]).toBe('c3-tooltip-name--data3');
+        });
+    });
+
+    describe('tooltip with data_order as Array with un-grouped data', function() {
+        beforeAll(function() {
+            dataOrder = [ 'data2', 'data1', 'data3' ];
+        });
+
+        it('should display each tooltip value in data order given by array', function() {
+            window.setMouseEvent(chart, 'mousemove', 100, 100, d3.select('.c3-event-rect-2').node());
+
+            var classes = d3.selectAll('.c3-tooltip tr')[0].map(function(node) {
+                return node.className;
+            });
+
+            expect(classes[0]).toBe(''); // header
+            expect(classes[1]).toBe('c3-tooltip-name--data2');
+            expect(classes[2]).toBe('c3-tooltip-name--data1');
+            expect(classes[3]).toBe('c3-tooltip-name--data3');
+        });
+    });
+
+    describe('tooltip with tooltip_order as desc', function() {
+        beforeAll(function() {
+            tooltipConfiguration = {
+                order: 'desc'
+            };
+
+            // this should be ignored
+            dataOrder = 'asc';
+            dataGroups = [ [ 'data1', 'data2', 'data3' ]];
+        });
+
+        it('should display each tooltip value descending order', function() {
+            window.setMouseEvent(chart, 'mousemove', 100, 100, d3.select('.c3-event-rect-2').node());
+
+            var classes = d3.selectAll('.c3-tooltip tr')[0].map(function(node) {
+                return node.className;
+            });
+
+            expect(classes[0]).toBe(''); // header
+            expect(classes[1]).toBe('c3-tooltip-name--data3'); // 110
+            expect(classes[2]).toBe('c3-tooltip-name--data1'); // 100
+            expect(classes[3]).toBe('c3-tooltip-name--data2'); // 10
+        });
+    });
+
+    describe('tooltip with tooltip_order as asc', function() {
+        beforeAll(function() {
+            tooltipConfiguration = {
+                order: 'asc'
+            };
+
+            // this should be ignored
+            dataOrder = 'desc';
+            dataGroups = [ [ 'data1', 'data2', 'data3' ]];
+        });
+
+        it('should display each tooltip value in ascending order', function() {
+            window.setMouseEvent(chart, 'mousemove', 100, 100, d3.select('.c3-event-rect-2').node());
+
+            var classes = d3.selectAll('.c3-tooltip tr')[0].map(function(node) {
+                return node.className;
+            });
+
+            expect(classes[0]).toBe(''); // header
+            expect(classes[1]).toBe('c3-tooltip-name--data2'); // 10
+            expect(classes[2]).toBe('c3-tooltip-name--data1'); // 100
+            expect(classes[3]).toBe('c3-tooltip-name--data3'); // 110
+        });
+    });
+
+    describe('tooltip with tooltip_order as NULL', function() {
+        beforeAll(function() {
+            tooltipConfiguration = {
+                order: null
+            };
+        });
+
+        it('should display each tooltip value in given order', function() {
+            window.setMouseEvent(chart, 'mousemove', 100, 100, d3.select('.c3-event-rect-2').node());
+
+            var classes = d3.selectAll('.c3-tooltip tr')[0].map(function(node) {
+                return node.className;
+            });
+
+            expect(classes[0]).toBe(''); // header
+            expect(classes[1]).toBe('c3-tooltip-name--data1');
+            expect(classes[2]).toBe('c3-tooltip-name--data2');
+            expect(classes[3]).toBe('c3-tooltip-name--data3');
+        });
+    });
+
+    describe('tooltip with tooltip_order as Function', function() {
+        beforeAll(function() {
+            var order = [ 'data2', 'data1', 'data3' ];
+            tooltipConfiguration = {
+                order: function(data1, data2) {
+                    return order.indexOf(data1.id) - order.indexOf(data2.id);
+                }
+            };
+        });
+
+        it('should display each tooltip value in data order given by function', function() {
+            window.setMouseEvent(chart, 'mousemove', 100, 100, d3.select('.c3-event-rect-2').node());
+
+            var classes = d3.selectAll('.c3-tooltip tr')[0].map(function(node) {
+                return node.className;
+            });
+
+            expect(classes[0]).toBe(''); // header
+            expect(classes[1]).toBe('c3-tooltip-name--data2');
+            expect(classes[2]).toBe('c3-tooltip-name--data1');
+            expect(classes[3]).toBe('c3-tooltip-name--data3');
+        });
+    });
+
+    describe('tooltip with tooltip_order as Array', function() {
+        beforeAll(function() {
+            tooltipConfiguration = {
+                order: [ 'data2', 'data1', 'data3' ]
+            };
+        });
+
+        it('should display each tooltip value in data order given by array', function() {
+            window.setMouseEvent(chart, 'mousemove', 100, 100, d3.select('.c3-event-rect-2').node());
+
+            var classes = d3.selectAll('.c3-tooltip tr')[0].map(function(node) {
+                return node.className;
+            });
+
+            expect(classes[0]).toBe(''); // header
+            expect(classes[1]).toBe('c3-tooltip-name--data2');
+            expect(classes[2]).toBe('c3-tooltip-name--data1');
+            expect(classes[3]).toBe('c3-tooltip-name--data3');
+        });
+    });
 });

src/config.js

@@ -208,6 +208,7 @@ c3_chart_internal_fn.getDefaultConfig = function () {
         // tooltip - show when mouseover on each data
         tooltip_show: true,
         tooltip_grouped: true,
+        tooltip_order: undefined,
         tooltip_format_title: undefined,
         tooltip_format_name: undefined,
         tooltip_format_value: undefined,

src/data.js

@@ -1,6 +1,6 @@
 import CLASS from './class';
 import { c3_chart_internal_fn } from './core';
-import { isValue, isFunction, notEmpty, hasValue } from './util';
+import { isValue, isFunction, isArray, notEmpty, hasValue } from './util';
 
 c3_chart_internal_fn.isX = function (key) {
     var $$ = this, config = $$.config;
@@ -237,7 +237,11 @@ c3_chart_internal_fn.orderTargets = function (targets) {
         });
     } else if (isFunction(config.data_order)) {
         targets.sort(config.data_order);
-    } // TODO: accept name array for order
+    } else if (isArray(config.data_order)) {
+        targets.sort(function (t1, t2) {
+            return config.data_order.indexOf(t1.id) - config.data_order.indexOf(t2.id);
+        });
+    }
     return targets;
 };
 c3_chart_internal_fn.filterByX = function (targets, x) {

src/tooltip.js

@@ -1,6 +1,6 @@
 import CLASS from './class';
 import { c3_chart_internal_fn } from './core';
-import { isValue, isString, sanitise } from './util';
+import { isValue, isFunction, isArray, isString, sanitise } from './util';
 
 c3_chart_internal_fn.initTooltip = function () {
     var $$ = this, config = $$.config, i;
@@ -28,31 +28,85 @@ c3_chart_internal_fn.initTooltip = function () {
             .style("display", "block");
     }
 };
+c3_chart_internal_fn.getTooltipSortFunction = function() {
+    var $$ = this, config = $$.config;
+
+    if (config.data_groups.length === 0 || config.tooltip_order !== undefined) {
+        // if data are not grouped or if an order is specified
+        // for the tooltip values we sort them by their values
+
+        var order = config.tooltip_order;
+        if (order === undefined) {
+            order = config.data_order;
+        }
+
+        var valueOf = function(obj) {
+            return obj ? obj.value : null;
+        };
+
+        // if data are not grouped, we sort them by their value
+        if (isString(order) && order.toLowerCase() === 'asc') {
+            return function(a, b) {
+                return valueOf(a) - valueOf(b);
+            };
+        } else if (isString(order) && order.toLowerCase() === 'desc') {
+            return function (a, b) {
+                return valueOf(b) - valueOf(a);
+            };
+        } else if (isFunction(order)) {
+
+            // if the function is from data_order we need
+            // to wrap the returned function in order to format
+            // the sorted value to the expected format
+
+            var sortFunction = order;
+
+            if (config.tooltip_order === undefined) {
+                sortFunction = function (a, b) {
+                    return order(a ? {
+                        id: a.id,
+                        values: [ a ]
+                    } : null, b ? {
+                        id: b.id,
+                        values: [ b ]
+                    } : null);
+                };
+            }
+
+            return sortFunction;
+
+        } else if (isArray(order)) {
+            return function(a, b) {
+                return order.indexOf(a.id) - order.indexOf(b.id);
+            };
+        }
+    } else {
+        // if data are grouped, we follow the order of grouped targets
+        var ids = $$.orderTargets($$.data.targets).map(function(i) {
+            return i.id;
+        });
+
+        // if it was either asc or desc we need to invert the order
+        // returned by orderTargets
+        if ($$.isOrderAsc() || $$.isOrderDesc()) {
+            ids = ids.reverse();
+        }
+
+        return function(a, b) {
+            return ids.indexOf(a.id) - ids.indexOf(b.id);
+        };
+    }
+};
 c3_chart_internal_fn.getTooltipContent = function (d, defaultTitleFormat, defaultValueFormat, color) {
     var $$ = this, config = $$.config,
         titleFormat = config.tooltip_format_title || defaultTitleFormat,
         nameFormat = config.tooltip_format_name || function (name) { return name; },
         valueFormat = config.tooltip_format_value || defaultValueFormat,
-        text, i, title, value, name, bgcolor,
-        orderAsc = $$.isOrderAsc();
+        text, i, title, value, name, bgcolor;
 
-    if (config.data_groups.length === 0) {
-        d.sort(function(a, b){
-            var v1 = a ? a.value : null, v2 = b ? b.value : null;
-            return orderAsc ? v1 - v2 : v2 - v1;
-        });
-    } else {
-        var ids = $$.orderTargets($$.data.targets).map(function (i) {
-            return i.id;
-        });
-        d.sort(function(a, b) {
-            var v1 = a ? a.value : null, v2 = b ? b.value : null;
-            if (v1 > 0 && v2 > 0) {
-                v1 = a ? ids.indexOf(a.id) : null;
-                v2 = b ? ids.indexOf(b.id) : null;
-            }
-            return orderAsc ? v1 - v2 : v2 - v1;
-        });
+    var tooltipSortFunction = this.getTooltipSortFunction();
+    if(tooltipSortFunction) {
+        d.sort(tooltipSortFunction);
     }
 
     for (i = 0; i < d.length; i++) {

src/util.js

@@ -6,6 +6,9 @@ export var isValue = function (v) {
 export var isFunction = function (o) {
     return typeof o === 'function';
 };
+export var isArray = function (o) {
+    return Array.isArray(o);
+};
 export var isString = function (o) {
     return typeof o === 'string';
 };