mirror of https://github.com/mum4k/termdash.git
119 lines
2.6 KiB
Go
119 lines
2.6 KiB
Go
// Copyright 2018 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Binary barchartdemo displays a couple of BarChart widgets.
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// Exist when 'q' is pressed.
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package main
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import (
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"context"
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"math/rand"
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"time"
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"github.com/mum4k/termdash"
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"github.com/mum4k/termdash/cell"
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"github.com/mum4k/termdash/container"
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"github.com/mum4k/termdash/linestyle"
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"github.com/mum4k/termdash/terminal/termbox"
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"github.com/mum4k/termdash/terminal/terminalapi"
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"github.com/mum4k/termdash/widgets/barchart"
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)
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// playBarChart continuously changes the displayed values on the bar chart once every delay.
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// Exits when the context expires.
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func playBarChart(ctx context.Context, bc *barchart.BarChart, delay time.Duration) {
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const (
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bars = 6
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max = 100
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)
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values := make([]int, 6)
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ticker := time.NewTicker(delay)
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defer ticker.Stop()
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for {
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select {
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case <-ticker.C:
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for i := range values {
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values[i] = int(rand.Int31n(max + 1))
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}
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if err := bc.Values(values, max); err != nil {
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panic(err)
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}
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case <-ctx.Done():
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return
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}
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}
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}
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func main() {
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t, err := termbox.New()
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if err != nil {
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panic(err)
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}
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defer t.Close()
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ctx, cancel := context.WithCancel(context.Background())
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bc, err := barchart.New(
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barchart.BarColors([]cell.Color{
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cell.ColorBlue,
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cell.ColorRed,
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cell.ColorYellow,
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cell.ColorBlue,
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cell.ColorGreen,
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cell.ColorRed,
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}),
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barchart.ValueColors([]cell.Color{
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cell.ColorRed,
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cell.ColorYellow,
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cell.ColorBlue,
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cell.ColorGreen,
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cell.ColorRed,
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cell.ColorBlue,
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}),
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barchart.ShowValues(),
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barchart.Labels([]string{
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"CPU1",
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"",
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"CPU3",
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}),
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)
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if err != nil {
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panic(err)
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}
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go playBarChart(ctx, bc, 1*time.Second)
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c, err := container.New(
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t,
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container.Border(linestyle.Light),
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container.BorderTitle("PRESS Q TO QUIT"),
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container.PlaceWidget(bc),
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)
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if err != nil {
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panic(err)
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}
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quitter := func(k *terminalapi.Keyboard) {
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if k.Key == 'q' || k.Key == 'Q' {
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cancel()
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}
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}
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if err := termdash.Run(ctx, t, c, termdash.KeyboardSubscriber(quitter)); err != nil {
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panic(err)
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}
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}
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