83 lines
1.3 KiB
Go
83 lines
1.3 KiB
Go
package main
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import (
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"io/ioutil"
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"os"
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"path/filepath"
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"github.com/vicanso/go-charts"
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)
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func writeFile(buf []byte) error {
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tmpPath := "./tmp"
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err := os.MkdirAll(tmpPath, 0700)
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if err != nil {
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return err
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}
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file := filepath.Join(tmpPath, "pie-chart.png")
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err = ioutil.WriteFile(file, buf, 0600)
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if err != nil {
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return err
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}
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return nil
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}
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func main() {
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p, err := charts.NewPainter(charts.PainterOptions{
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Width: 800,
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Height: 600,
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Type: charts.ChartOutputPNG,
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})
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if err != nil {
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panic(err)
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}
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_, err = charts.NewPieChart(p, charts.PieChartOption{
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Title: charts.TitleOption{
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Text: "Rainfall vs Evaporation",
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Subtext: "Fake Data",
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Left: charts.PositionCenter,
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},
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Padding: charts.Box{
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Top: 20,
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Right: 20,
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Bottom: 20,
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Left: 20,
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},
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Legend: charts.LegendOption{
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Orient: charts.OrientVertical,
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Data: []string{
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"Search Engine",
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"Direct",
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"Email",
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"Union Ads",
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"Video Ads",
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},
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Left: charts.PositionLeft,
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},
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SeriesList: charts.NewPieSeriesList([]float64{
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1048,
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735,
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580,
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484,
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300,
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}, charts.PieSeriesOption{
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Label: charts.SeriesLabel{
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Show: true,
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},
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Radius: "35%",
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}),
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}).Render()
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if err != nil {
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panic(err)
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}
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buf, err := p.Bytes()
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if err != nil {
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panic(err)
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}
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err = writeFile(buf)
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if err != nil {
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panic(err)
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}
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}
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