42 lines
1 KiB
Go
42 lines
1 KiB
Go
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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/drawing"
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)
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func drawChart(res http.ResponseWriter, req *http.Request) {
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/*
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In this example we set some custom colors for the series and the chart background and canvas.
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*/
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graph := chart.Chart{
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Background: chart.Style{
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FillColor: drawing.ColorBlue,
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},
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Canvas: chart.Style{
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FillColor: drawing.ColorFromHex("efefef"),
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},
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Series: []chart.Series{
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chart.ContinuousSeries{
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Style: chart.Style{
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Show: true, //note; if we set ANY other properties, we must set this to true.
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StrokeColor: drawing.ColorRed, // will supercede defaults
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FillColor: drawing.ColorRed.WithAlpha(64), // will supercede defaults
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},
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XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
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YValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
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},
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},
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}
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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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