mirror of https://github.com/mum4k/termdash.git
114 lines
2.9 KiB
Go
114 lines
2.9 KiB
Go
// Copyright 2019 Google Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
// Binary linechartdemo displays a linechart widget.
|
|
// Exist when 'q' is pressed.
|
|
package main
|
|
|
|
import (
|
|
"context"
|
|
"math"
|
|
"time"
|
|
|
|
"github.com/mum4k/termdash"
|
|
"github.com/mum4k/termdash/cell"
|
|
"github.com/mum4k/termdash/container"
|
|
"github.com/mum4k/termdash/linestyle"
|
|
"github.com/mum4k/termdash/terminal/termbox"
|
|
"github.com/mum4k/termdash/terminal/terminalapi"
|
|
"github.com/mum4k/termdash/widgets/linechart"
|
|
)
|
|
|
|
// sineInputs generates values from -1 to 1 for display on the line chart.
|
|
func sineInputs() []float64 {
|
|
var res []float64
|
|
|
|
for i := 0; i < 200; i++ {
|
|
v := math.Sin(float64(i) / 100 * math.Pi)
|
|
res = append(res, v)
|
|
}
|
|
return res
|
|
}
|
|
|
|
// playLineChart continuously adds values to the LineChart, once every delay.
|
|
// Exits when the context expires.
|
|
func playLineChart(ctx context.Context, lc *linechart.LineChart, delay time.Duration) {
|
|
inputs := sineInputs()
|
|
ticker := time.NewTicker(delay)
|
|
defer ticker.Stop()
|
|
for i := 0; ; {
|
|
select {
|
|
case <-ticker.C:
|
|
i = (i + 1) % len(inputs)
|
|
rotated := append(inputs[i:], inputs[:i]...)
|
|
if err := lc.Series("first", rotated,
|
|
linechart.SeriesCellOpts(cell.FgColor(cell.ColorBlue)),
|
|
linechart.SeriesXLabels(map[int]string{
|
|
0: "zero",
|
|
}),
|
|
); err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
i2 := (i + 100) % len(inputs)
|
|
rotated2 := append(inputs[i2:], inputs[:i2]...)
|
|
if err := lc.Series("second", rotated2, linechart.SeriesCellOpts(cell.FgColor(cell.ColorWhite))); err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
case <-ctx.Done():
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
func main() {
|
|
t, err := termbox.New()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
defer t.Close()
|
|
|
|
const redrawInterval = 250 * time.Millisecond
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
lc, err := linechart.New(
|
|
linechart.AxesCellOpts(cell.FgColor(cell.ColorRed)),
|
|
linechart.YLabelCellOpts(cell.FgColor(cell.ColorGreen)),
|
|
linechart.XLabelCellOpts(cell.FgColor(cell.ColorCyan)),
|
|
)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
go playLineChart(ctx, lc, redrawInterval/3)
|
|
c, err := container.New(
|
|
t,
|
|
container.Border(linestyle.Light),
|
|
container.BorderTitle("PRESS Q TO QUIT"),
|
|
container.PlaceWidget(lc),
|
|
)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
quitter := func(k *terminalapi.Keyboard) {
|
|
if k.Key == 'q' || k.Key == 'Q' {
|
|
cancel()
|
|
}
|
|
}
|
|
|
|
if err := termdash.Run(ctx, t, c, termdash.KeyboardSubscriber(quitter), termdash.RedrawInterval(redrawInterval)); err != nil {
|
|
panic(err)
|
|
}
|
|
}
|