/
pref_helper.go
72 lines (59 loc) · 1.47 KB
/
pref_helper.go
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
package binding
import (
"sync"
"fyne.io/fyne/v2"
)
type preferenceItem interface {
checkForChange()
}
type preferenceBindings struct {
items sync.Map // map[string]preferenceItem
}
func (b *preferenceBindings) getItem(key string) preferenceItem {
val, loaded := b.items.Load(key)
if !loaded {
return nil
}
return val.(preferenceItem)
}
func (b *preferenceBindings) list() []preferenceItem {
ret := []preferenceItem{}
b.items.Range(func(_, val interface{}) bool {
ret = append(ret, val.(preferenceItem))
return true
})
return ret
}
func (b *preferenceBindings) setItem(key string, item preferenceItem) {
b.items.Store(key, item)
}
type preferencesMap struct {
prefs sync.Map // map[fyne.Preferences]*preferenceBindings
}
func newPreferencesMap() *preferencesMap {
return &preferencesMap{}
}
func (m *preferencesMap) ensurePreferencesAttached(p fyne.Preferences) *preferenceBindings {
binds, loaded := m.prefs.LoadOrStore(p, &preferenceBindings{})
if loaded {
return binds.(*preferenceBindings)
}
p.AddChangeListener(func() { m.preferencesChanged(p) })
return binds.(*preferenceBindings)
}
func (m *preferencesMap) getBindings(p fyne.Preferences) *preferenceBindings {
binds, loaded := m.prefs.Load(p)
if !loaded {
return nil
}
return binds.(*preferenceBindings)
}
func (m *preferencesMap) preferencesChanged(p fyne.Preferences) {
binds := m.getBindings(p)
if binds == nil {
return
}
for _, item := range binds.list() {
item.checkForChange()
}
}