70 lines
1.5 KiB
Go
70 lines
1.5 KiB
Go
package main
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import (
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"net/http"
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"github.com/wcharczuk/go-chart"
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"github.com/wcharczuk/go-chart/seq"
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)
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func drawChart(res http.ResponseWriter, req *http.Request) {
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mainSeries := chart.ContinuousSeries{
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Name: "A test series",
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XValues: seq.Range(1.0, 100.0),
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YValues: seq.New(seq.NewRandom().WithLen(100).WithAverage(100).WithScale(50)).Array(),
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}
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minSeries := &chart.MinSeries{
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Style: chart.Style{
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Show: true,
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StrokeColor: chart.ColorAlternateGray,
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StrokeDashArray: []float64{5.0, 5.0},
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},
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InnerSeries: mainSeries,
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}
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maxSeries := &chart.MaxSeries{
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Style: chart.Style{
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Show: true,
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StrokeColor: chart.ColorAlternateGray,
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StrokeDashArray: []float64{5.0, 5.0},
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},
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InnerSeries: mainSeries,
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}
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graph := chart.Chart{
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Width: 1920,
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Height: 1080,
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YAxis: chart.YAxis{
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Name: "Random Values",
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NameStyle: chart.StyleShow(),
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Style: chart.StyleShow(),
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Range: &chart.ContinuousRange{
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Min: 25,
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Max: 175,
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},
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},
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XAxis: chart.XAxis{
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Name: "Random Other Values",
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NameStyle: chart.StyleShow(),
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Style: chart.StyleShow(),
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},
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Series: []chart.Series{
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mainSeries,
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minSeries,
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maxSeries,
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chart.LastValueAnnotation(minSeries),
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chart.LastValueAnnotation(maxSeries),
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},
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}
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graph.Elements = []chart.Renderable{chart.Legend(&graph)}
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res.Header().Set("Content-Type", "image/png")
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graph.Render(chart.PNG, res)
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}
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func main() {
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http.HandleFunc("/", drawChart)
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http.ListenAndServe(":8080", nil)
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}
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