1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
package widgets
import (
"time"
"github.com/gdamore/tcell"
"git.sr.ht/~sircmpwn/aerc2/lib/ui"
)
var (
frames = []string{
"[..] ",
" [..] ",
" [..] ",
" [..] ",
" [..]",
" [..] ",
" [..] ",
" [..] ",
}
)
type Spinner struct {
frame int
onInvalidate func(d ui.Drawable)
stop chan interface{}
}
func NewSpinner() *Spinner {
spinner := Spinner{
stop: make(chan interface{}),
frame: -1,
}
return &spinner
}
func (s *Spinner) Start() {
s.frame = 0
go func() {
for {
select {
case <-s.stop:
return
case <-time.After(200 * time.Millisecond):
s.frame++
if s.frame >= len(frames) {
s.frame = 0
}
s.Invalidate()
}
}
}()
}
func (s *Spinner) Stop() {
s.stop <- nil
s.frame = -1
s.Invalidate()
}
func (s *Spinner) IsRunning() bool {
return s.frame != -1
}
func (s *Spinner) Draw(ctx *ui.Context) {
ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', tcell.StyleDefault)
col := ctx.Width()/2 - len(frames[0])/2 + 1
ctx.Printf(col, 0, tcell.StyleDefault, "%s", frames[s.frame])
}
func (s *Spinner) OnInvalidate(onInvalidate func(d ui.Drawable)) {
s.onInvalidate = onInvalidate
}
func (s *Spinner) Invalidate() {
if s.onInvalidate != nil {
s.onInvalidate(s)
}
}
|
