termui/_examples/piechart.go

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// +build ignore
package main
import (
"fmt"
"math"
"math/rand"
"time"
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ui "github.com/gizak/termui"
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)
func main() {
err := ui.Init()
if err != nil {
panic(err)
}
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defer ui.Close()
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rand.Seed(time.Now().UTC().UnixNano())
randomDataAndOffset := func() (data []float64, offset float64) {
noSlices := 1 + rand.Intn(5)
data = make([]float64, noSlices)
for i := range data {
data[i] = rand.Float64()
}
offset = 2.0 * math.Pi * rand.Float64()
return
}
run := true
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pc := ui.NewPieChart()
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pc.BorderLabel = "Pie Chart"
pc.Width = 70
pc.Height = 36
pc.Data = []float64{.25, .25, .25, .25}
pc.Offset = -.5 * math.Pi
pc.Label = func(i int, v float64) string {
return fmt.Sprintf("%.02f", v)
}
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pause := func() {
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run = !run
if run {
pc.BorderLabel = "Pie Chart"
} else {
pc.BorderLabel = "Pie Chart (Stopped)"
}
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ui.Render(pc)
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}
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ui.Render(pc)
uiEvents := ui.PollEvents()
ticker := time.NewTicker(time.Second).C
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for {
select {
case e := <-uiEvents:
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switch e.ID {
case "q", "<C-c>":
return
case "s":
pause()
}
case <-ticker:
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if run {
pc.Data, pc.Offset = randomDataAndOffset()
ui.Render(pc)
}
}
}
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}