hook up favorite status with GridView items

ui/browsing/artistpage.go

@@ -219,10 +219,12 @@ func (a *ArtistPage) getGridViewAlbumsModel() []widgets.GridViewItemModel {
 	sort.Slice(a.artistInfo.Albums, sortFunc)
 	return sharedutil.MapSlice(a.artistInfo.Albums, func(al *mediaprovider.Album) widgets.GridViewItemModel {
 		return widgets.GridViewItemModel{
-			Name:       al.Name,
-			ID:         al.ID,
-			CoverArtID: al.CoverArtID,
-			Secondary:  []string{strconv.Itoa(al.YearOrZero())},
+			Name:        al.Name,
+			ID:          al.ID,
+			CoverArtID:  al.CoverArtID,
+			Secondary:   []string{strconv.Itoa(al.YearOrZero())},
+			CanFavorite: true,
+			IsFavorite:  al.Favorite,
 		}
 	})
 }

ui/browsing/favoritespage.go

@@ -104,7 +104,7 @@ func (a *FavoritesPage) createHeader(activeBtnIdx int) {
 	a.shuffleBtn.Hidden = activeBtnIdx != 2 /*favorite songs*/
 	a.searcher = widgets.NewSearchEntry()
 	a.searcher.PlaceHolder = lang.L("Search page")
-	a.searcher.OnSearched = a.OnSearched
+	a.searcher.OnSearched = a.onSearched
 	a.searcher.Entry.Text = a.searchText
 	a.filterBtn = widgets.NewAlbumFilterButton(a.filter, a.mp.GetGenres)
 	a.filterBtn.FavoriteDisabled = true
@@ -267,7 +267,7 @@ func (a *FavoritesPage) SearchWidget() fyne.Focusable {
 	return a.searcher
 }
 
-func (a *FavoritesPage) OnSearched(query string) {
+func (a *FavoritesPage) onSearched(query string) {
 	if query == "" {
 		a.albumGrid.ResetFromState(a.gridState)
 		a.searchGridState = nil
@@ -386,10 +386,12 @@ func buildArtistGridViewModel(artists []*mediaprovider.Artist) []widgets.GridVie
 			albums = lang.L("album")
 		}
 		model = append(model, widgets.GridViewItemModel{
-			ID:         ar.ID,
-			CoverArtID: ar.CoverArtID,
-			Name:       ar.Name,
-			Secondary:  []string{fmt.Sprintf("%d %s", ar.AlbumCount, albums)},
+			ID:          ar.ID,
+			CoverArtID:  ar.CoverArtID,
+			Name:        ar.Name,
+			Secondary:   []string{fmt.Sprintf("%d %s", ar.AlbumCount, albums)},
+			CanFavorite: true,
+			IsFavorite:  ar.Favorite,
 		})
 	}
 	return model

ui/widgets/gridview.go

@@ -60,6 +60,8 @@ func (g gridViewAlbumIterator) NextN(n int) []GridViewItemModel {
 			CoverArtID:   al.CoverArtID,
 			Secondary:    al.ArtistNames,
 			SecondaryIDs: al.ArtistIDs,
+			CanFavorite:  true,
+			IsFavorite:   al.Favorite,
 		}
 		if y := al.Date.Year; y != nil {
 			model.Suffix = strconv.Itoa(*al.Date.Year)
@@ -84,10 +86,12 @@ func (g gridViewArtistIterator) NextN(n int) []GridViewItemModel {
 			albumsLabel = lang.L("album")
 		}
 		return GridViewItemModel{
-			Name:       ar.Name,
-			ID:         ar.ID,
-			CoverArtID: ar.CoverArtID,
-			Secondary:  []string{fmt.Sprintf("%d %s", ar.AlbumCount, albumsLabel)},
+			Name:        ar.Name,
+			ID:          ar.ID,
+			CoverArtID:  ar.CoverArtID,
+			Secondary:   []string{fmt.Sprintf("%d %s", ar.AlbumCount, albumsLabel)},
+			CanFavorite: true,
+			IsFavorite:  ar.Favorite,
 		}
 	})
 }

ui/widgets/gridviewitem.go

@@ -27,6 +27,9 @@ var _ fyne.Widget = (*coverImage)(nil)
 type coverImage struct {
 	widget.BaseWidget
 
+	EnableFavorite bool
+	IsFavorite     bool
+
 	Im                *ImagePlaceholder
 	playbtn           *canvas.Image
 	favoriteButton    *canvas.Image
@@ -118,11 +121,11 @@ func (c *coverImage) CreateRenderer() fyne.WidgetRenderer {
 	return widget.NewSimpleRenderer(
 		container.NewStack(
 			c.Im,
-			container.NewCenter(c.playbtn),
 			container.NewGridWithRows(2,
 				layout.NewSpacer(),
 				c.bottomPanel,
 			),
+			container.NewCenter(c.playbtn),
 		),
 	)
 }
@@ -151,6 +154,12 @@ func (c *coverImage) TappedSecondary(e *fyne.PointEvent) {
 
 func (a *coverImage) MouseIn(*desktop.MouseEvent) {
 	a.playbtn.Hidden = false
+	if a.IsFavorite {
+		a.favoriteButton.Resource = heartFilledResource
+	} else {
+		a.favoriteButton.Resource = heartUnfilledResource
+	}
+	a.favoriteButton.Hidden = !a.EnableFavorite
 	a.bottomPanel.Hidden = false
 	a.Refresh()
 }
@@ -204,6 +213,8 @@ type GridViewItemModel struct {
 	Secondary    []string
 	SecondaryIDs []string
 	Suffix       string
+	CanFavorite  bool
+	IsFavorite   bool
 }
 
 type GridViewItem struct {
@@ -282,6 +293,8 @@ func (g *GridViewItem) NeedsUpdate(model GridViewItemModel) bool {
 }
 
 func (g *GridViewItem) Update(model GridViewItemModel) {
+	g.Cover.IsFavorite = model.IsFavorite
+	g.Cover.EnableFavorite = model.CanFavorite
 	g.itemID = model.ID
 	g.secondaryIDs = model.SecondaryIDs
 	g.primaryText.SetText(model.Name)