go-chart/_examples/stacked_bar/main.go
2018-12-06 16:46:27 +01:00

66 lines
1.3 KiB
Go

package main
import (
"fmt"
"log"
"net/http"
"git.gutmet.org/go-chart.git"
)
func drawChart(res http.ResponseWriter, req *http.Request) {
sbc := chart.StackedBarChart{
Title: "Test Stacked Bar Chart",
TitleStyle: chart.StyleShow(),
Background: chart.Style{
Padding: chart.Box{
Top: 40,
},
},
Height: 512,
XAxis: chart.StyleShow(),
YAxis: chart.StyleShow(),
Bars: []chart.StackedBar{
{
Name: "This is a very long string to test word break wrapping.",
Values: []chart.Value{
{Value: 5, Label: "Blue"},
{Value: 5, Label: "Green"},
{Value: 4, Label: "Gray"},
{Value: 3, Label: "Orange"},
{Value: 3, Label: "Test"},
{Value: 2, Label: "??"},
{Value: 1, Label: "!!"},
},
},
{
Name: "Test",
Values: []chart.Value{
{Value: 10, Label: "Blue"},
{Value: 5, Label: "Green"},
{Value: 1, Label: "Gray"},
},
},
{
Name: "Test 2",
Values: []chart.Value{
{Value: 10, Label: "Blue"},
{Value: 6, Label: "Green"},
{Value: 4, Label: "Gray"},
},
},
},
}
res.Header().Set("Content-Type", "image/png")
err := sbc.Render(chart.PNG, res)
if err != nil {
fmt.Printf("Error rendering chart: %v\n", err)
}
}
func main() {
http.HandleFunc("/", drawChart)
log.Fatal(http.ListenAndServe(":8080", nil))
}