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// +build ignore
package main
import (
"fmt"
"log"
"math"
"math/rand"
"time"
ui "github.com/gizak/termui/v3"
"github.com/gizak/termui/v3/widgets"
)
var run = true
func main() {
if err := ui.Init(); err != nil {
log.Fatalf("failed to initialize termui: %v", err)
}
defer ui.Close()
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
}
pc := widgets.NewPieChart()
pc.Title = "Pie Chart"
pc.SetRect(5, 5, 70, 36)
pc.Data = []float64{.25, .25, .25, .25}
pc.AngleOffset = -.5 * math.Pi
pc.LabelFormatter = func(i int, v float64) string {
return fmt.Sprintf("%.02f", v)
}
pause := func() {
run = !run
if run {
pc.Title = "Pie Chart"
} else {
pc.Title = "Pie Chart (Stopped)"
}
ui.Render(pc)
}
ui.Render(pc)
uiEvents := ui.PollEvents()
ticker := time.NewTicker(time.Second).C
for {
select {
case e := <-uiEvents:
switch e.ID {
case "q", "<C-c>":
return
case "s":
pause()
}
case <-ticker:
if run {
pc.Data, pc.AngleOffset = randomDataAndOffset()
ui.Render(pc)
}
}
}
}
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