Feat: add sunburst example (#26)

* Feat: add sunburst example

examples/sunburst.go

@@ -0,0 +1,53 @@
+package examples
+
+import (
+	"io"
+	"math/rand"
+	"os"
+	"strconv"
+
+	"github.com/go-echarts/go-echarts/v2/charts"
+	"github.com/go-echarts/go-echarts/v2/components"
+	"github.com/go-echarts/go-echarts/v2/opts"
+)
+
+func generateSunburstItems() []opts.SunBurstData {
+	items := make([]opts.SunBurstData, 0)
+	for i := 0; i < 7; i++ {
+		items = append(items, opts.SunBurstData{
+			Value: rand.Float64(),
+			Name:  "parent-" + strconv.Itoa(i),
+			Children: []*opts.SunBurstData{
+				{
+					Value: rand.Float64(),
+					Name:  "child-" + strconv.Itoa(i),
+				},
+			},
+		})
+	}
+	return items
+}
+
+func sunburstBase() *charts.Sunburst {
+	sunburst := charts.NewSunburst()
+	sunburst.SetGlobalOptions(
+		charts.WithTitleOpts(opts.Title{Title: "basic sunburst example"}),
+	)
+	sunburst.AddSeries("sunburst", generateSunburstItems())
+	return sunburst
+}
+
+type SunburstExample struct{}
+
+func (SunburstExample) Examples() {
+	page := components.NewPage()
+	page.AddCharts(
+		sunburstBase(),
+	)
+	f, err := os.Create("examples/html/sunburst.html")
+	if err != nil {
+		panic(err)
+	}
+	page.Render(io.MultiWriter(f))
+
+}

main.go

@@ -45,6 +45,7 @@ func main() {
 		examples.ThemeriverExamples{},
 		examples.ThemeExamples{},
 		examples.WordcloudExamples{},
+		examples.SunburstExample{},
 	}
 
 	for _, e := range examplers {