aerc/lib/ui/ui.go -rw-r--r-- 1.7 KiB View raw
                                                                                
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package ui

import (
	"sync/atomic"

	"github.com/gdamore/tcell"
)

type UI struct {
	Content DrawableInteractive
	exit    atomic.Value // bool
	ctx     *Context
	screen  tcell.Screen

	tcEvents chan tcell.Event
	invalid  int32 // access via atomic
}

func Initialize(content DrawableInteractiveBeeper) (*UI, error) {
1 reference
screen, err := tcell.NewScreen() if err != nil { return nil, err } if err = screen.Init(); err != nil { return nil, err } screen.Clear() screen.HideCursor() width, height := screen.Size() state := UI{ Content: content, ctx: NewContext(width, height, screen), screen: screen, tcEvents: make(chan tcell.Event, 10), } state.exit.Store(false) go func() { for !state.ShouldExit() { state.tcEvents <- screen.PollEvent() } }() state.invalid = 1 content.OnInvalidate(func(_ Drawable) { atomic.StoreInt32(&state.invalid, 1) }) content.OnBeep(screen.Beep) content.Focus(true) return &state, nil } func (state *UI) ShouldExit() bool {
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return state.exit.Load().(bool) } func (state *UI) Exit() {
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state.exit.Store(true) } func (state *UI) Close() {
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state.screen.Fini() } func (state *UI) Tick() bool {
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more := false select { case event := <-state.tcEvents: switch event := event.(type) { case *tcell.EventResize: state.screen.Clear() width, height := event.Size() state.ctx = NewContext(width, height, state.screen) state.Content.Invalidate() } state.Content.Event(event) more = true default: } wasInvalid := atomic.SwapInt32(&state.invalid, 0) if wasInvalid != 0 { state.Content.Draw(state.ctx) state.screen.Show() more = true } return more } func (state *UI) EnableMouse() {
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state.screen.EnableMouse() }