a few more goroutines

main.go

@@ -77,7 +77,7 @@ func main() {
 	mainWindow := ui.NewMainWindow(fyneApp, res.AppName, res.DisplayName, res.AppVersion, myApp)
 	mainWindow.Window.SetMaster()
 	myApp.OnReactivate = mainWindow.Show
-	myApp.OnExit = mainWindow.Quit
+	myApp.OnExit = func() { fyne.Do(mainWindow.Quit) }
 
 	fyneApp.Lifecycle().SetOnEnteredForeground(sync.OnceFunc(func() {
 		defaultServer := myApp.ServerManager.GetDefaultServer()

ui/browsing/genrespage.go

@@ -64,20 +64,22 @@ func (a *GenresPage) load(searchOnLoad bool, scrollPos float32) {
 	if err != nil {
 		log.Printf("error loading genres: %v", err.Error())
 	}
-	a.genres = genres
+	fyne.Do(func() {
-	if searchOnLoad {
+		a.genres = genres
-		a.onSearched(a.searcher.Entry.Text)
+		if searchOnLoad {
-		if scrollPos != 0 {
+			a.onSearched(a.searcher.Entry.Text)
-			a.list.list.ScrollToOffset(scrollPos)
+			if scrollPos != 0 {
+				a.list.list.ScrollToOffset(scrollPos)
+			}
+		} else {
+			a.list.SetGenres(a.genres)
+			if scrollPos != 0 {
+				a.list.list.ScrollToOffset(scrollPos)
+				return
+			}
+			a.list.Refresh()
 		}
-	} else {
+	})
-		a.list.SetGenres(a.genres)
-		if scrollPos != 0 {
-			a.list.list.ScrollToOffset(scrollPos)
-			return
-		}
-		a.list.Refresh()
-	}
 }
 
 func (a *GenresPage) onSearched(query string) {

ui/browsing/nowplayingpage.go

@@ -297,7 +297,8 @@ func (a *NowPlayingPage) onImageLoaded(img image.Image, err error) {
 	if err != nil {
 		log.Printf("error loading cover art: %v\n", err)
 	}
-	a.card.SetCoverImage(img)
+
+	fyne.Do(func() { a.card.SetCoverImage(img) })
 	if img == nil {
 		return
 	}
@@ -307,18 +308,15 @@ func (a *NowPlayingPage) onImageLoaded(img image.Image, err error) {
 		return
 	}
 
-	evenFrame := true
+	// Fyne animation starting is currently thread-safe,
+	// despite not being marked as such
+	// TODO: if this changes, use fyne.Do
 	anim := canvas.NewColorRGBAAnimation(
 		a.background.StartColor, c, 75*time.Millisecond, func(c color.Color) {
-			// reduce fps to reduce mem allocations
+			a.background.StartColor = c
-			if evenFrame {
+			a.background.Refresh()
-				a.background.StartColor = c
-				a.background.Refresh()
-			}
-			evenFrame = !evenFrame
 		})
 	anim.Start()
-
 }
 
 func (a *NowPlayingPage) updateLyrics() {

ui/browsing/playlistpage.go

@@ -349,6 +349,7 @@ func (a *PlaylistPageHeader) Update(playlist *mediaprovider.PlaylistWithTracks)
 	a.Refresh()
 }
 
+// should be called asynchronously
 func (a *PlaylistPageHeader) showPopUpCover() {
 	if a.fullSizeCoverFetching || a.playlistInfo == nil {
 		return
@@ -361,7 +362,7 @@ func (a *PlaylistPageHeader) showPopUpCover() {
 		return
 	}
 	if a.page != nil {
-		a.page.contr.ShowPopUpImage(cover)
+		fyne.Do(func() { a.page.contr.ShowPopUpImage(cover) })
 	}
 }
 

ui/mainwindow.go

@@ -133,22 +133,6 @@ func NewMainWindow(fyneApp fyne.App, appName, displayAppName, appVersion string,
 
 	m.Window.SetCloseIntercept(func() {
 		m.SaveWindowSize()
-		// save settings in case we crash during shutdown
-		// TODO: when all shutdowns exit cleanly, remove these lines
-		// as they are already executed in app.Shutdown()
-		app.Config.LocalPlayback.Volume = app.LocalPlayer.GetVolume()
-		repeatMode := "None"
-		switch app.PlaybackManager.GetLoopMode() {
-		case backend.LoopOne:
-			repeatMode = "One"
-		case backend.LoopAll:
-			repeatMode = "All"
-		}
-		app.Config.Playback.RepeatMode = repeatMode
-		app.Config.Playback.Autoplay = app.PlaybackManager.IsAutoplay()
-		app.SavePlayQueueIfEnabled()
-		app.SaveConfigFile()
-
 		if app.Config.Application.CloseToSystemTray && m.HaveSystemTray() {
 			m.Window.Hide()
 		} else {

ui/util/util.go

@@ -199,7 +199,9 @@ func NewDebouncer(dur time.Duration, callOnDone func()) func() {
 		if timer != nil {
 			timer.Stop()
 		}
-		timer = time.AfterFunc(dur, callOnDone)
+		timer = time.AfterFunc(dur, func() {
+			fyne.Do(callOnDone)
+		})
 	}
 }