feat/tree: add tree chart type

charts/tree.go

@@ -0,0 +1,35 @@
+package charts
+
+import (
+	"github.com/go-echarts/go-echarts/v2/opts"
+	"github.com/go-echarts/go-echarts/v2/render"
+	"github.com/go-echarts/go-echarts/v2/types"
+)
+
+// Tree represents a Tree chart.
+type Tree struct {
+	RectChart
+}
+
+// Type returns the chart type.
+func (Tree) Type() string { return types.Tree }
+
+// NewTree creates a new Tree chart instance.
+func NewTree() *Tree {
+	c := &Tree{}
+	c.initBaseConfiguration()
+	c.Renderer = render.NewChartRender(c, c.Validate)
+	return c
+}
+
+func (c *Tree) AddSeries(name string, data []opts.TreeData, options ...SeriesOpts) *Tree {
+	series := SingleSeries{Name: name, Type: types.Tree, Data: data}
+	series.configureSeriesOpts(options...)
+	c.MultiSeries = append(c.MultiSeries, series)
+	return c
+}
+
+// Validate validates the given configuration.
+func (c *Tree) Validate() {
+	c.Assets.Validate(c.AssetsHost)
+}

opts/charts.go

@@ -516,3 +516,13 @@ type Chart3DData struct {
 	// The style setting of the text label in a single bar.
 	Label *Label `json:"label,omitempty"`
 }
+
+type TreeData struct {
+	// Name of the data item.
+	Name string `json:"name,omitempty"`
+
+	// Value of the data item.
+	Value int `json:"value,omitempty"`
+
+	Children []*TreeData `json:"children,omitempty"`
+}

types/charts.go

@@ -26,4 +26,5 @@ const (
 	ChartSurface3D     = "surface"
 	ChartThemeRiver    = "themeRiver"
 	ChartWordCloud     = "wordCloud"
+	Tree               = "tree"
 )