add album page showing track listing

ui/albumpage.go

@@ -0,0 +1,68 @@
+package ui
+
+import (
+	"log"
+	"supersonic/backend"
+	"supersonic/ui/widgets"
+
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/layout"
+	"fyne.io/fyne/v2/theme"
+	"fyne.io/fyne/v2/widget"
+)
+
+type AlbumPage struct {
+	widget.BaseWidget
+
+	albumID   string
+	im        *backend.ImageManager
+	lm        *backend.LibraryManager
+	titleDisp *widget.RichText
+	tracklist *widgets.Tracklist
+	container *fyne.Container
+
+	OnPlayAlbum func(string, int)
+}
+
+func NewAlbumPage(albumID string, lm *backend.LibraryManager) *AlbumPage {
+	a := &AlbumPage{albumID: albumID, lm: lm}
+	a.ExtendBaseWidget(a)
+	a.titleDisp = widget.NewRichTextWithText("Artist")
+	a.titleDisp.Segments[0].(*widget.TextSegment).Style = widget.RichTextStyle{
+		SizeName: theme.SizeNameHeadingText,
+	}
+	a.container = container.NewBorder(a.titleDisp, nil, nil, nil, layout.NewSpacer())
+	a.loadAsync()
+	return a
+}
+
+func (a *AlbumPage) CreateRenderer() fyne.WidgetRenderer {
+	return widget.NewSimpleRenderer(a.container)
+}
+
+func (a *AlbumPage) SetPlayAlbumCallback(cb func(string, int)) {
+	a.OnPlayAlbum = cb
+}
+
+func (a *AlbumPage) onPlayTrackAt(tracknum int) {
+	if a.OnPlayAlbum != nil {
+		a.OnPlayAlbum(a.albumID, tracknum)
+	}
+}
+
+func (a *AlbumPage) loadAsync() {
+	go func() {
+		album, err := a.lm.GetAlbum(a.albumID)
+		if err != nil {
+			log.Printf("Failed to get album: %s", err.Error())
+			return
+		}
+		a.titleDisp.Segments[0].(*widget.TextSegment).Text = album.Name
+		a.titleDisp.Refresh()
+		tl := widgets.NewTracklist(album.Song)
+		tl.OnPlayTrackAt = a.onPlayTrackAt
+		a.container.Objects[0] = tl
+		a.container.Refresh()
+	}()
+}