119 lines
2.2 KiB
Go
119 lines
2.2 KiB
Go
package widgets
|
|
|
|
import (
|
|
"sync"
|
|
"time"
|
|
|
|
"fyne.io/fyne/v2"
|
|
"fyne.io/fyne/v2/theme"
|
|
"fyne.io/fyne/v2/widget"
|
|
)
|
|
|
|
// Searcher is a search entry widget that will issue a search command
|
|
// (aka call OnSearched) when a short span of time has elapsed since
|
|
// the user typed into the widget.
|
|
type Searcher struct {
|
|
Entry *SearchEntry
|
|
OnSearched func(string)
|
|
|
|
searchGoroutine bool
|
|
pendingSearch bool
|
|
pendingSearchLock sync.Mutex
|
|
}
|
|
|
|
func NewSearcher() *Searcher {
|
|
s := &Searcher{
|
|
Entry: NewSearchEntry(),
|
|
}
|
|
s.Entry.OnChanged = s.onSearchTextChanged
|
|
return s
|
|
}
|
|
|
|
func (s *Searcher) onSearchTextChanged(text string) {
|
|
if text == "" {
|
|
s.sendSearch("")
|
|
return
|
|
}
|
|
s.pendingSearchLock.Lock()
|
|
defer s.pendingSearchLock.Unlock()
|
|
s.pendingSearch = true
|
|
if !s.searchGoroutine {
|
|
go s.waitAndSearch()
|
|
s.searchGoroutine = true
|
|
}
|
|
}
|
|
|
|
func (s *Searcher) waitAndSearch() {
|
|
t := time.NewTicker(200 * time.Millisecond)
|
|
var getReadyToSearch bool
|
|
var done bool
|
|
for !done {
|
|
<-t.C
|
|
s.pendingSearchLock.Lock()
|
|
if s.pendingSearch {
|
|
getReadyToSearch = true
|
|
s.pendingSearch = false
|
|
} else if getReadyToSearch {
|
|
s.sendSearch(s.Entry.Text)
|
|
t.Stop()
|
|
s.searchGoroutine = false
|
|
done = true
|
|
}
|
|
s.pendingSearchLock.Unlock()
|
|
}
|
|
}
|
|
|
|
func (s *Searcher) sendSearch(text string) {
|
|
if s.OnSearched != nil {
|
|
s.OnSearched(text)
|
|
}
|
|
}
|
|
|
|
type SearchEntry struct {
|
|
widget.Entry
|
|
}
|
|
|
|
func NewSearchEntry() *SearchEntry {
|
|
sf := &SearchEntry{}
|
|
sf.ExtendBaseWidget(sf)
|
|
sf.PlaceHolder = "Search"
|
|
sf.ActionItem = NewClearTextButton(func() {
|
|
sf.SetText("")
|
|
})
|
|
return sf
|
|
}
|
|
|
|
func (s *SearchEntry) Refresh() {
|
|
if s.Text == "" {
|
|
s.ActionItem.(*clearTextButton).Resource = theme.SearchIcon()
|
|
} else {
|
|
s.ActionItem.(*clearTextButton).Resource = theme.ContentClearIcon()
|
|
}
|
|
s.Entry.Refresh()
|
|
}
|
|
|
|
func (s *SearchEntry) MinSize() fyne.Size {
|
|
return fyne.NewSize(200, s.Entry.MinSize().Height)
|
|
}
|
|
|
|
var _ fyne.Tappable = (*clearTextButton)(nil)
|
|
|
|
type clearTextButton struct {
|
|
widget.Icon
|
|
|
|
OnTapped func()
|
|
}
|
|
|
|
func NewClearTextButton(onTapped func()) *clearTextButton {
|
|
c := &clearTextButton{OnTapped: onTapped}
|
|
c.ExtendBaseWidget(c)
|
|
c.Resource = theme.SearchIcon()
|
|
return c
|
|
}
|
|
|
|
func (c *clearTextButton) Tapped(*fyne.PointEvent) {
|
|
if c.OnTapped != nil {
|
|
c.OnTapped()
|
|
}
|
|
}
|