feat: support bar chart render

2022-06-14 23:07:11 +08:00 · 2022-06-14 23:07:11 +08:00 · b69728dd12
commit b69728dd12
parent 8a5990fe8f
11 changed files with 408 additions and 50 deletions
--- a/examples/bar_chart/main.go
+++ b/examples/bar_chart/main.go
@ -0,0 +1,127 @@
+package main
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+
+	"github.com/vicanso/go-charts"
+)
+
+func writeFile(buf []byte) error {
+	tmpPath := "./tmp"
+	err := os.MkdirAll(tmpPath, 0700)
+	if err != nil {
+		return err
+	}
+
+	file := filepath.Join(tmpPath, "bar-chart.png")
+	err = ioutil.WriteFile(file, buf, 0600)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func main() {
+	p, err := charts.NewPainter(charts.PainterOptions{
+		Width:  800,
+		Height: 600,
+		Type:   charts.ChartOutputPNG,
+	})
+	if err != nil {
+		panic(err)
+	}
+	_, err = charts.NewBarChart(p, charts.BarChartOption{
+		Title: charts.TitleOption{
+			Text:    "Rainfall vs Evaporation",
+			Subtext: "Fake Data",
+		},
+		Padding: charts.Box{
+			Top:    20,
+			Right:  20,
+			Bottom: 20,
+			Left:   20,
+		},
+		XAxis: charts.NewXAxisOption([]string{
+			"Jan",
+			"Feb",
+			"Mar",
+			"Apr",
+			"May",
+			"Jun",
+			"Jul",
+			"Aug",
+			"Sep",
+			"Oct",
+			"Nov",
+			"Dec",
+		}),
+		Legend: charts.NewLegendOption([]string{
+			"Rainfall",
+			"Evaporation",
+		}, charts.PositionRight),
+		SeriesList: []charts.Series{
+			{
+				Type: charts.ChartTypeBar,
+				Data: charts.NewSeriesDataFromValues([]float64{
+					2.0,
+					4.9,
+					7.0,
+					23.2,
+					25.6,
+					76.7,
+					135.6,
+					162.2,
+					32.6,
+					20.0,
+					6.4,
+					3.3,
+				}),
+				MarkPoint: charts.NewMarkPoint(
+					charts.SeriesMarkDataTypeMax,
+					charts.SeriesMarkDataTypeMin,
+				),
+				MarkLine: charts.NewMarkLine(
+					charts.SeriesMarkDataTypeAverage,
+				),
+			},
+			{
+				Type: charts.ChartTypeBar,
+				Data: charts.NewSeriesDataFromValues([]float64{
+					2.6,
+					5.9,
+					9.0,
+					26.4,
+					28.7,
+					70.7,
+					175.6,
+					182.2,
+					48.7,
+					18.8,
+					6.0,
+					2.3,
+				}),
+				MarkPoint: charts.NewMarkPoint(
+					charts.SeriesMarkDataTypeMax,
+					charts.SeriesMarkDataTypeMin,
+				),
+				MarkLine: charts.NewMarkLine(
+					charts.SeriesMarkDataTypeAverage,
+				),
+			},
+		},
+	}).Render()
+	if err != nil {
+		panic(err)
+	}
+
+	buf, err := p.Bytes()
+	if err != nil {
+		panic(err)
+	}
+	err = writeFile(buf)
+	if err != nil {
+		panic(err)
+	}
+}