111 lines
2.8 KiB
Go
111 lines
2.8 KiB
Go
package main
|
|
|
|
import (
|
|
"net/http"
|
|
|
|
"github.com/wcharczuk/go-chart"
|
|
)
|
|
|
|
func drawChart(res http.ResponseWriter, req *http.Request) {
|
|
|
|
/*
|
|
In this example we add a `Renderable` or a custom component to the `Elements` array.
|
|
In this specific case it is a pre-built renderable (`CreateLegend`) that draws a legend for the chart's series.
|
|
If you like, you can use `CreateLegend` as a template for writing your own renderable, or even your own legend.
|
|
*/
|
|
|
|
graph := chart.Chart{
|
|
XAxis: chart.XAxis{
|
|
Style: chart.StyleShow(),
|
|
},
|
|
YAxis: chart.YAxis{
|
|
Style: chart.StyleShow(),
|
|
},
|
|
Background: chart.Style{
|
|
Padding: chart.Box{
|
|
Top: 20,
|
|
Left: 260,
|
|
},
|
|
},
|
|
Series: []chart.Series{
|
|
chart.ContinuousSeries{
|
|
Name: "A test series",
|
|
XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
YValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
},
|
|
|
|
chart.ContinuousSeries{
|
|
Name: "Another test series",
|
|
XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
YValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
},
|
|
|
|
chart.ContinuousSeries{
|
|
Name: "Yet Another test series",
|
|
XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
YValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
},
|
|
|
|
chart.ContinuousSeries{
|
|
Name: "Even More series",
|
|
XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
YValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
},
|
|
|
|
chart.ContinuousSeries{
|
|
Name: "Foo Bar",
|
|
XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
YValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
},
|
|
|
|
chart.ContinuousSeries{
|
|
Name: "Bar Baz",
|
|
XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
YValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
},
|
|
|
|
chart.ContinuousSeries{
|
|
Name: "Moo Bar",
|
|
XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
YValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
},
|
|
|
|
chart.ContinuousSeries{
|
|
Name: "Zoo Bar Baz",
|
|
XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
YValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
},
|
|
|
|
chart.ContinuousSeries{
|
|
Name: "Fast and the Furious",
|
|
XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
YValues: []float64{5.0, 4.0, 3.0, 2.0, 1.0},
|
|
},
|
|
|
|
chart.ContinuousSeries{
|
|
Name: "2 Fast 2 Furious",
|
|
XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
YValues: []float64{5.0, 4.0, 3.0, 2.0, 1.0},
|
|
},
|
|
|
|
chart.ContinuousSeries{
|
|
Name: "They only get more fast and more furious",
|
|
XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
|
|
YValues: []float64{5.0, 4.0, 3.0, 2.0, 1.0},
|
|
},
|
|
},
|
|
}
|
|
|
|
//note we have to do this as a separate step because we need a reference to graph
|
|
graph.Elements = []chart.Renderable{
|
|
chart.LegendLeft(&graph),
|
|
}
|
|
|
|
res.Header().Set("Content-Type", "image/png")
|
|
graph.Render(chart.PNG, res)
|
|
}
|
|
|
|
func main() {
|
|
http.HandleFunc("/", drawChart)
|
|
http.ListenAndServe(":8080", nil)
|
|
}
|