album page now highlights currently playing track (with bold/italic font for now)

ui/widgets/tracklist.go

@@ -14,8 +14,9 @@ import (
 type TrackRow struct {
 	widget.BaseWidget
 
-	trackID     string
-	prevTrackID string
+	trackID       string
+	prevTrackID   string
+	prevIsPlaying bool
 
 	num    *widget.RichText
 	name   *widget.RichText
@@ -39,22 +40,28 @@ func NewTrackRow() *TrackRow {
 	t.artist.Wrapping = fyne.TextTruncate
 	t.dur = widget.NewRichTextWithText("")
 
-	t.container = container.New(layouts.NewColumnsLayout([]float32{30, -1, -1, 55}),
+	t.container = container.New(layouts.NewColumnsLayout([]float32{35, -1, -1, 55}),
 		t.num, t.name, t.artist, t.dur)
 	return t
 }
 
-func (t *TrackRow) Update(tr *subsonic.Child) {
-	if tr.ID == t.prevTrackID {
+func (t *TrackRow) Update(tr *subsonic.Child, isPlaying bool) {
+	if tr.ID == t.prevTrackID && isPlaying == t.prevIsPlaying {
 		return
 	}
 	t.prevTrackID = t.trackID
+	t.prevIsPlaying = isPlaying
 	t.trackID = tr.ID
 	t.num.Segments[0].(*widget.TextSegment).Text = strconv.Itoa(tr.Track)
 	t.name.Segments[0].(*widget.TextSegment).Text = tr.Title
 	t.artist.Segments[0].(*widget.TextSegment).Text = tr.Artist
 	t.dur.Segments[0].(*widget.TextSegment).Text = util.SecondsToTimeString(float64(tr.Duration))
 
+	t.num.Segments[0].(*widget.TextSegment).Style.TextStyle = fyne.TextStyle{Bold: isPlaying}
+	t.name.Segments[0].(*widget.TextSegment).Style.TextStyle = fyne.TextStyle{Bold: isPlaying, Italic: isPlaying}
+	t.artist.Segments[0].(*widget.TextSegment).Style.TextStyle = fyne.TextStyle{Bold: isPlaying, Italic: isPlaying}
+	t.dur.Segments[0].(*widget.TextSegment).Style.TextStyle = fyne.TextStyle{Bold: isPlaying}
+
 	t.Refresh()
 }
 
@@ -71,26 +78,38 @@ func (t *TrackRow) DoubleTapped(*fyne.PointEvent) {
 type Tracklist struct {
 	widget.BaseWidget
 
-	tracks []*subsonic.Child
-	list   *widget.List
-
+	Tracks        []*subsonic.Child
 	OnPlayTrackAt func(int)
+
+	nowPlayingIdx int
+	list          *widget.List
 }
 
 func NewTracklist(tracks []*subsonic.Child) *Tracklist {
-	t := &Tracklist{tracks: tracks}
+	t := &Tracklist{Tracks: tracks, nowPlayingIdx: -1}
 	t.ExtendBaseWidget(t)
 	t.list = widget.NewList(
-		func() int { return len(t.tracks) },
+		func() int { return len(t.Tracks) },
 		func() fyne.CanvasObject { return NewTrackRow() },
 		func(itemID widget.ListItemID, item fyne.CanvasObject) {
 			tr := item.(*TrackRow)
 			tr.OnDoubleTapped = func() { t.onPlayTrackAt(itemID) }
-			tr.Update(t.tracks[itemID])
+			tr.Update(t.Tracks[itemID], itemID == t.nowPlayingIdx)
 		})
 	return t
 }
 
+func (t *Tracklist) SetNowPlaying(trackID string) {
+	t.nowPlayingIdx = -1
+	for i, tr := range t.Tracks {
+		if tr.ID == trackID {
+			t.nowPlayingIdx = i
+			break
+		}
+	}
+	t.list.Refresh()
+}
+
 func (t *Tracklist) CreateRenderer() fyne.WidgetRenderer {
 	return widget.NewSimpleRenderer(t.list)
 }