149 lines
3.0 KiB
Go
149 lines
3.0 KiB
Go
package ui
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import (
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"supersonic/backend"
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"supersonic/ui/widgets"
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"sync"
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"time"
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"fyne.io/fyne/v2"
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"fyne.io/fyne/v2/container"
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"fyne.io/fyne/v2/theme"
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"fyne.io/fyne/v2/widget"
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)
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type Page interface {
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fyne.Widget
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}
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type Searchable interface {
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OnSearched(string)
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}
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type CanPlayAlbum interface {
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SetPlayAlbumCallback(func(albumID string, startingTrack int))
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}
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type BrowsingPane struct {
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widget.BaseWidget
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app *backend.App
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curPage Page
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forward *widget.Button
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back *widget.Button
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history []Page
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historyIdx int
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searchBar *widgets.SearchEntry
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pendingSearchLock sync.Mutex
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pendingSearch bool
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searchGoroutine bool
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container *fyne.Container
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}
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type blankPage struct {
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widget.Separator
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}
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func NewBrowsingPane(app *backend.App) *BrowsingPane {
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b := &BrowsingPane{app: app}
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b.ExtendBaseWidget(b)
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b.searchBar = widgets.NewSearchEntry()
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b.searchBar.OnTextChanged = b.onSearchTextChanged
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b.back = widget.NewButtonWithIcon("", theme.NavigateBackIcon(), b.GoBack)
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b.forward = widget.NewButtonWithIcon("", theme.NavigateNextIcon(), b.GoForward)
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b.curPage = &blankPage{}
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b.container = container.NewBorder(
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container.NewVBox(
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container.NewHBox(b.back, b.forward, b.searchBar),
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widgets.NewThickSeparator(),
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),
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nil, nil, nil, b.curPage)
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return b
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}
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func (b *BrowsingPane) SetPage(p Page) {
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b.addPageToHistory(p)
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b.doSetPage(p)
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}
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func (b *BrowsingPane) doSetPage(p Page) {
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b.curPage = p
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if pa, ok := p.(CanPlayAlbum); ok {
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pa.SetPlayAlbumCallback(func(albumID string, firstTrack int) {
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_ = b.app.PlaybackManager.PlayAlbum(albumID, firstTrack)
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})
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}
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_, s := p.(Searchable)
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b.searchBar.Hidden = !s
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b.container.Objects[0] = p
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b.Refresh()
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}
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func (b *BrowsingPane) addPageToHistory(p Page) {
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b.history = b.history[:b.historyIdx]
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b.history = append(b.history, p)
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b.historyIdx++
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}
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func (b *BrowsingPane) GoBack() {
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if b.historyIdx > 1 {
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b.historyIdx -= 1
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b.doSetPage(b.history[b.historyIdx-1])
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}
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}
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func (b *BrowsingPane) GoForward() {
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if b.historyIdx < len(b.history) {
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b.historyIdx++
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b.doSetPage(b.history[b.historyIdx-1])
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}
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}
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func (b *BrowsingPane) onSearchTextChanged(text string) {
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if text == "" {
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b.sendSearch("")
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return
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}
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b.pendingSearchLock.Lock()
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defer b.pendingSearchLock.Unlock()
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b.pendingSearch = true
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if !b.searchGoroutine {
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go b.waitAndSearch()
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b.searchGoroutine = true
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}
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}
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func (b *BrowsingPane) waitAndSearch() {
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t := time.NewTicker(200 * time.Millisecond)
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var getReadyToSearch bool
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var done bool
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for !done {
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<-t.C
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b.pendingSearchLock.Lock()
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if b.pendingSearch {
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getReadyToSearch = true
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b.pendingSearch = false
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} else if getReadyToSearch {
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b.sendSearch(b.searchBar.Text)
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t.Stop()
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b.searchGoroutine = false
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done = true
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}
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b.pendingSearchLock.Unlock()
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}
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}
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func (b *BrowsingPane) sendSearch(query string) {
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if s, ok := b.curPage.(Searchable); ok {
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s.OnSearched(query)
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}
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}
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func (b *BrowsingPane) CreateRenderer() fyne.WidgetRenderer {
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return widget.NewSimpleRenderer(b.container)
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}
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