zeni/go-chart
1
0
Fork 0
Code Issues Pull requests Projects Releases 2 Packages Wiki Activity Actions

???

Browse source
This commit is contained in:
Will Charczuk 2016-07-11 18:48:51 -07:00
parent 01983f4e86
commit 9a5138b21d
17 changed files with 477 additions and 308 deletions
Download patch file Download diff file Expand all files Collapse all files

93
testserver/main.go
View file

@ -2,14 +2,16 @@ package main
import (
"log"
"math/rand"
"net/http"
"time"
"github.com/wcharczuk/go-chart"
"github.com/wcharczuk/go-chart/drawing"
"github.com/wcharczuk/go-web"
)
func chartHandler(rc *web.RequestContext) web.ControllerResult {
rnd := rand.New(rand.NewSource(0))
format, err := rc.RouteParameter("format")
if err != nil {
format = "png"
@ -21,11 +23,14 @@ func chartHandler(rc *web.RequestContext) web.ControllerResult {
rc.Response.Header().Set("Content-Type", "image/svg+xml")
}
s1x := []float64{2.0, 3.0, 4.0, 5.0}
s1y := []float64{2.5, 5.0, 2.0, 3.3}
s2x := []float64{0.0, 0.5, 1.0, 1.5}
s2y := []float64{1.1, 1.2, 1.0, 1.3}
var s1x []time.Time
for x := 0; x < 100; x++ {
s1x = append([]time.Time{time.Now().AddDate(0, 0, -1*x)}, s1x...)
}
var s1y []float64
for x := 0; x < 100; x++ {
s1y = append(s1y, rnd.Float64()*1024)
}
c := chart.Chart{
Title: "A Test Chart",
@ -43,32 +48,19 @@ func chartHandler(rc *web.RequestContext) web.ControllerResult {
Style: chart.Style{
Show: true,
},
Range: chart.Range{
Min: 0.0,
Max: 7.0,
},
},
YAxisSecondary: chart.YAxis{
Style: chart.Style{
Show: true,
},
Range: chart.Range{
Min: 0.8,
Max: 1.5,
Zero: chart.GridLine{
Style: chart.Style{
Show: true,
StrokeWidth: 1.0,
},
},
},
Series: []chart.Series{
chart.ContinuousSeries{
chart.TimeSeries{
Name: "a",
XValues: s1x,
YValues: s1y,
},
chart.ContinuousSeries{
Name: "b",
YAxis: chart.YAxisSecondary,
XValues: s2x,
YValues: s2y,
},
},
}
@ -84,56 +76,6 @@ func chartHandler(rc *web.RequestContext) web.ControllerResult {
return nil
}
func measureTestHandler(rc *web.RequestContext) web.ControllerResult {
format, err := rc.RouteParameter("format")
if err != nil {
format = "png"
}
if format == "png" {
rc.Response.Header().Set("Content-Type", "image/png")
} else {
rc.Response.Header().Set("Content-Type", "image/svg+xml")
}
var r chart.Renderer
if format == "png" {
r, err = chart.PNG(512, 512)
} else {
r, err = chart.SVG(512, 512)
}
if err != nil {
return rc.API().InternalError(err)
}
f, err := chart.GetDefaultFont()
if err != nil {
return rc.API().InternalError(err)
}
r.SetDPI(96)
r.SetFont(f)
r.SetFontSize(10.0)
r.SetFontColor(drawing.ColorBlack)
r.SetStrokeColor(drawing.ColorBlack)
label := "goog - 702.23"
tx, ty := 64, 64
tw, th := r.MeasureText(label)
r.MoveTo(tx, ty)
r.LineTo(tx+tw, ty)
r.LineTo(tx+tw, ty-th)
r.LineTo(tx, ty-th)
r.LineTo(tx, ty)
r.Stroke()
r.Text(label, tx, ty)
r.Save(rc.Response)
return nil
}
func main() {
app := web.New()
app.SetName("Chart Test Server")
@ -143,6 +85,5 @@ func main() {
app.GET("/favico.ico", func(rc *web.RequestContext) web.ControllerResult {
return rc.Raw([]byte{})
})
app.GET("/measure", measureTestHandler)
log.Fatal(app.Start())
}