mirror of https://github.com/mum4k/termdash.git
146 lines
3.5 KiB
Go
146 lines
3.5 KiB
Go
// Copyright 2019 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 donutdemo displays a couple of Donut 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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"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/donut"
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)
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// playType indicates how to play a donut.
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type playType int
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const (
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playTypePercent playType = iota
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playTypeAbsolute
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)
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// playDonut continuously changes the displayed percent value on the donut by the
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// step once every delay. Exits when the context expires.
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func playDonut(ctx context.Context, d *donut.Donut, start, step int, delay time.Duration, pt playType) {
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progress := start
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mult := 1
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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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switch pt {
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case playTypePercent:
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if err := d.Percent(progress); err != nil {
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panic(err)
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}
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case playTypeAbsolute:
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if err := d.Absolute(progress, 100); err != nil {
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panic(err)
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}
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}
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progress += step * mult
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if progress > 100 || 100-progress < step {
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progress = 100
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} else if progress < 0 || progress < step {
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progress = 0
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}
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if progress == 100 {
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mult = -1
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} else if progress == 0 {
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mult = 1
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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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green, err := donut.New(donut.CellOpts(cell.FgColor(cell.ColorGreen)))
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if err != nil {
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panic(err)
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}
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go playDonut(ctx, green, 0, 1, 250*time.Millisecond, playTypePercent)
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blue, err := donut.New(donut.CellOpts(cell.FgColor(cell.ColorBlue)))
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if err != nil {
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panic(err)
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}
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go playDonut(ctx, blue, 25, 1, 500*time.Millisecond, playTypePercent)
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yellow, err := donut.New(donut.CellOpts(cell.FgColor(cell.ColorYellow)))
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if err != nil {
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panic(err)
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}
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go playDonut(ctx, yellow, 50, 1, 1*time.Second, playTypeAbsolute)
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red, err := donut.New(donut.CellOpts(cell.FgColor(cell.ColorRed)))
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if err != nil {
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panic(err)
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}
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go playDonut(ctx, red, 75, 1, 2*time.Second, playTypeAbsolute)
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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.SplitVertical(
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container.Left(
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container.SplitVertical(
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container.Left(container.PlaceWidget(green)),
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container.Right(container.PlaceWidget(blue)),
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),
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),
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container.Right(
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container.SplitVertical(
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container.Left(container.PlaceWidget(yellow)),
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container.Right(container.PlaceWidget(red)),
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),
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),
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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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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), termdash.RedrawInterval(1*time.Second)); err != nil {
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panic(err)
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}
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}
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