more refactoring to make nowplayingcard more consistent with rest of widget APIs

ui/bottompanel.go

@@ -73,15 +73,15 @@ func NewBottomPanel(p *player.Player, pm *backend.PlaybackManager, contr *contro
 	bp.NowPlaying.OnAddToPlaylist = func() {
 		contr.DoAddTracksToPlaylistWorkflow([]string{bp.playbackManager.NowPlaying().ID})
 	}
-	bp.NowPlaying.OnAlbumNameTapped(func() {
+	bp.NowPlaying.OnAlbumNameTapped = func() {
 		contr.NavigateTo(controller.AlbumRoute(bp.playbackManager.NowPlaying().AlbumID))
-	})
+	}
-	bp.NowPlaying.OnArtistNameTapped(func(artistID string) {
+	bp.NowPlaying.OnArtistNameTapped = func(artistID string) {
 		contr.NavigateTo(controller.ArtistRoute(artistID))
-	})
+	}
-	bp.NowPlaying.OnTrackNameTapped(func() {
+	bp.NowPlaying.OnTrackNameTapped = func() {
 		contr.NavigateTo(controller.NowPlayingRoute(bp.playbackManager.NowPlaying().ID))
-	})
+	}
 	bp.Controls = widgets.NewPlayerControls()
 	bp.Controls.OnPlayPause(func() {
 		p.PlayPause()

ui/widgets/nowplayingcard.go

@@ -23,6 +23,9 @@ type NowPlayingCard struct {
 	cover      *TappableImage
 	menu       *widget.PopUpMenu
 
+	OnTrackNameTapped  func()
+	OnArtistNameTapped func(artistID string)
+	OnAlbumNameTapped  func()
 	OnShowCoverImage   func()
 	OnSetRating        func(rating int)
 	OnSetFavorite      func(favorite bool)
@@ -46,6 +49,9 @@ func NewNowPlayingCard() *NowPlayingCard {
 	n.cover.SetMinSize(fyne.NewSize(85, 85))
 	n.cover.FillMode = canvas.ImageFillContain
 	n.cover.Hidden = true
+	n.albumName.OnTapped = n.onAlbumNameTapped
+	n.artistName.OnTapped = n.onArtistNameTapped
+	n.trackName.OnTapped = n.onTrackNameTapped
 
 	return n
 }
@@ -55,6 +61,24 @@ func (n *NowPlayingCard) MinSize() fyne.Size {
 	return fyne.NewSize(n.BaseWidget.MinSize().Width, 85)
 }
 
+func (n *NowPlayingCard) onAlbumNameTapped() {
+	if n.OnAlbumNameTapped != nil {
+		n.OnAlbumNameTapped()
+	}
+}
+
+func (n *NowPlayingCard) onArtistNameTapped(artistID string) {
+	if n.OnArtistNameTapped != nil {
+		n.OnArtistNameTapped(artistID)
+	}
+}
+
+func (n *NowPlayingCard) onTrackNameTapped() {
+	if n.OnTrackNameTapped != nil {
+		n.OnTrackNameTapped()
+	}
+}
+
 func (n *NowPlayingCard) onShowCoverImage(*fyne.PointEvent) {
 	if n.OnShowCoverImage != nil {
 		n.OnShowCoverImage()
@@ -99,18 +123,6 @@ func (n *NowPlayingCard) Update(track string, artists, artistIDs []string, album
 	n.Refresh()
 }
 
-func (n *NowPlayingCard) OnArtistNameTapped(f func(string)) {
-	n.artistName.OnTapped = f
-}
-
-func (n *NowPlayingCard) OnAlbumNameTapped(f func()) {
-	n.albumName.OnTapped = f
-}
-
-func (n *NowPlayingCard) OnTrackNameTapped(f func()) {
-	n.trackName.OnTapped = f
-}
-
 func (n *NowPlayingCard) showMenu(e *fyne.PointEvent) {
 	if n.menu == nil {
 		ratingMenu := util.NewRatingSubmenu(n.onSetRating)