package main
import (
"bytes"
"net/http"
charts "github.com/vicanso/go-charts"
"github.com/wcharczuk/go-chart/v2"
"github.com/wcharczuk/go-chart/v2/drawing"
)
var html = `
go-charts
{{body}}
`
func indexHandler(w http.ResponseWriter, req *http.Request) {
if req.URL.Path != "/" {
return
}
theme := req.URL.Query().Get("theme")
chartOptions := []charts.ChartOption{
// 普通折线图
{
Theme: theme,
Title: charts.TitleOption{
Text: "Line",
},
Legend: charts.NewLegendOption([]string{
"Email",
"Union Ads",
"Video Ads",
"Direct",
"Search Engine",
}),
XAxis: charts.NewXAxisOption([]string{
"Mon",
"Tue",
"Wed",
"Thu",
"Fri",
"Sat",
"Sun",
}),
SeriesList: []charts.Series{
charts.NewSeriesFromValues([]float64{
120,
132,
101,
134,
90,
230,
210,
}),
charts.NewSeriesFromValues([]float64{
220,
182,
191,
234,
290,
330,
310,
}),
charts.NewSeriesFromValues([]float64{
150,
232,
201,
154,
190,
330,
410,
}),
charts.NewSeriesFromValues([]float64{
320,
332,
301,
334,
390,
330,
320,
}),
charts.NewSeriesFromValues([]float64{
820,
932,
901,
934,
1290,
1330,
1320,
}),
},
},
// 温度折线图
{
Theme: theme,
Title: charts.TitleOption{
Text: "Temperature Change in the Coming Week",
},
Padding: chart.Box{
Top: 20,
Left: 20,
Right: 30,
Bottom: 20,
},
Legend: charts.NewLegendOption([]string{
"Highest",
"Lowest",
}, charts.PositionRight),
XAxis: charts.NewXAxisOption([]string{
"Mon",
"Tue",
"Wed",
"Thu",
"Fri",
"Sat",
"Sun",
}, charts.FalseFlag()),
SeriesList: []charts.Series{
{
Data: charts.NewSeriesDataFromValues([]float64{
14,
11,
13,
11,
12,
12,
7,
}),
MarkPoint: charts.NewMarkPoint(charts.SeriesMarkDataTypeMax, charts.SeriesMarkDataTypeMin),
MarkLine: charts.NewMarkLine(charts.SeriesMarkDataTypeAverage),
},
{
Data: charts.NewSeriesDataFromValues([]float64{
1,
-2,
2,
5,
3,
2,
0,
}),
MarkLine: charts.NewMarkLine(charts.SeriesMarkDataTypeAverage),
},
},
},
// 柱状图
{
Theme: theme,
Title: charts.TitleOption{
Text: "Bar",
},
XAxis: charts.NewXAxisOption([]string{
"Mon",
"Tue",
"Wed",
"Thu",
"Fri",
"Sat",
"Sun",
}),
Legend: charts.NewLegendOption([]string{
"Rainfall",
"Evaporation",
}),
SeriesList: []charts.Series{
charts.NewSeriesFromValues([]float64{
120,
200,
150,
80,
70,
110,
130,
}, charts.ChartTypeBar),
{
Type: charts.ChartTypeBar,
Data: []charts.SeriesData{
{
Value: 100,
},
{
Value: 190,
Style: chart.Style{
FillColor: drawing.Color{
R: 169,
G: 0,
B: 0,
A: 255,
},
},
},
{
Value: 230,
},
{
Value: 140,
},
{
Value: 100,
},
{
Value: 200,
},
{
Value: 180,
},
},
},
},
},
// 柱状图+mark
{
Theme: theme,
Title: charts.TitleOption{
Text: "Rainfall vs Evaporation",
Subtext: "Fake Data",
},
Padding: chart.Box{
Top: 20,
Right: 20,
Bottom: 20,
Left: 20,
},
XAxis: charts.NewXAxisOption([]string{
"Jan",
"Feb",
"Mar",
"Apr",
"May",
"Jun",
"Jul",
"Aug",
"Sep",
"Oct",
"Nov",
"Dec",
}),
Legend: charts.NewLegendOption([]string{
"Rainfall",
"Evaporation",
}, charts.PositionRight),
SeriesList: []charts.Series{
{
Type: charts.ChartTypeBar,
Data: charts.NewSeriesDataFromValues([]float64{
2.0,
4.9,
7.0,
23.2,
25.6,
76.7,
135.6,
162.2,
32.6,
20.0,
6.4,
3.3,
}),
MarkPoint: charts.NewMarkPoint(
charts.SeriesMarkDataTypeMax,
charts.SeriesMarkDataTypeMin,
),
MarkLine: charts.NewMarkLine(
charts.SeriesMarkDataTypeAverage,
),
},
{
Type: charts.ChartTypeBar,
Data: charts.NewSeriesDataFromValues([]float64{
2.6,
5.9,
9.0,
26.4,
28.7,
70.7,
175.6,
182.2,
48.7,
18.8,
6.0,
2.3,
}),
MarkPoint: charts.NewMarkPoint(
charts.SeriesMarkDataTypeMax,
charts.SeriesMarkDataTypeMin,
),
MarkLine: charts.NewMarkLine(
charts.SeriesMarkDataTypeAverage,
),
},
},
},
// 双Y轴示例
{
Theme: theme,
XAxis: charts.NewXAxisOption([]string{
"Jan",
"Feb",
"Mar",
"Apr",
"May",
"Jun",
"Jul",
"Aug",
"Sep",
"Oct",
"Nov",
"Dec",
}),
Legend: charts.NewLegendOption([]string{
"Evaporation",
"Precipitation",
"Temperature",
}),
YAxisList: []charts.YAxisOption{
{
Formatter: "{value}°C",
Color: drawing.Color{
R: 250,
G: 200,
B: 88,
A: 255,
},
},
{
Formatter: "{value}ml",
Color: drawing.Color{
R: 84,
G: 112,
B: 198,
A: 255,
},
},
},
SeriesList: []charts.Series{
{
Type: charts.ChartTypeBar,
Data: charts.NewSeriesDataFromValues([]float64{
2.0,
4.9,
7.0,
23.2,
25.6,
76.7,
135.6,
162.2,
32.6,
20.0,
6.4,
3.3,
}),
YAxisIndex: 1,
},
{
Type: charts.ChartTypeBar,
Data: charts.NewSeriesDataFromValues([]float64{
2.6,
5.9,
9.0,
26.4,
28.7,
70.7,
175.6,
182.2,
48.7,
18.8,
6.0,
2.3,
}),
YAxisIndex: 1,
},
{
Data: charts.NewSeriesDataFromValues([]float64{
2.0,
2.2,
3.3,
4.5,
6.3,
10.2,
20.3,
23.4,
23.0,
16.5,
12.0,
6.2,
}),
},
},
},
// 饼图
{
Theme: theme,
Title: charts.TitleOption{
Text: "Referer of a Website",
Subtext: "Fake Data",
Left: charts.PositionCenter,
},
Legend: charts.LegendOption{
Orient: charts.OrientVertical,
Data: []string{
"Search Engine",
"Direct",
"Email",
"Union Ads",
"Video Ads",
},
Left: charts.PositionLeft,
},
SeriesList: charts.NewPieSeriesList([]float64{
1048,
735,
580,
484,
300,
}, charts.PieSeriesOption{
Label: charts.SeriesLabel{
Show: true,
},
Radius: "35%",
}),
},
// 多图展示
{
Theme: theme,
Legend: charts.LegendOption{
Top: "-90",
Data: []string{
"Milk Tea",
"Matcha Latte",
"Cheese Cocoa",
"Walnut Brownie",
},
},
Padding: chart.Box{
Top: 100,
},
XAxis: charts.NewXAxisOption([]string{
"2012",
"2013",
"2014",
"2015",
"2016",
"2017",
}),
YAxisList: []charts.YAxisOption{
{
Min: charts.NewFloatPoint(0),
Max: charts.NewFloatPoint(90),
},
},
SeriesList: []charts.Series{
charts.NewSeriesFromValues([]float64{
56.5,
82.1,
88.7,
70.1,
53.4,
85.1,
}),
charts.NewSeriesFromValues([]float64{
51.1,
51.4,
55.1,
53.3,
73.8,
68.7,
}),
charts.NewSeriesFromValues([]float64{
40.1,
62.2,
69.5,
36.4,
45.2,
32.5,
}, charts.ChartTypeBar),
charts.NewSeriesFromValues([]float64{
25.2,
37.1,
41.2,
18,
33.9,
49.1,
}, charts.ChartTypeBar),
},
Children: []charts.ChartOption{
{
Legend: charts.LegendOption{
Show: charts.FalseFlag(),
Data: []string{
"Milk Tea",
"Matcha Latte",
"Cheese Cocoa",
"Walnut Brownie",
},
},
Box: chart.Box{
Top: 20,
Left: 400,
Right: 500,
Bottom: 120,
},
SeriesList: charts.NewPieSeriesList([]float64{
435.9,
354.3,
285.9,
204.5,
}, charts.PieSeriesOption{
Label: charts.SeriesLabel{
Show: true,
},
Radius: "35%",
}),
},
},
},
}
bytesList := make([][]byte, 0)
for _, opt := range chartOptions {
d, err := charts.Render(opt)
if err != nil {
panic(err)
}
buf, err := d.Bytes()
if err != nil {
panic(err)
}
bytesList = append(bytesList, buf)
}
data := bytes.ReplaceAll([]byte(html), []byte("{{body}}"), bytes.Join(bytesList, []byte("")))
w.Header().Set("Content-Type", "text/html")
w.Write(data)
}
func main() {
http.HandleFunc("/", indexHandler)
http.ListenAndServe(":3012", nil)
}