remember volume setting across restarts

backend/app.go

@@ -46,6 +46,8 @@ func StartupApp() (*App, error) {
 	if err := a.initMPV(); err != nil {
 		return nil, err
 	}
+	a.Config.LocalPlayback.Volume = clamp(a.Config.LocalPlayback.Volume, 0, 100)
+	a.Player.SetVolume(a.Config.LocalPlayback.Volume)
 
 	a.ServerManager = NewServerManager()
 	a.PlaybackManager = NewPlaybackManager(a.bgrndCtx, a.ServerManager, a.Player)
@@ -91,10 +93,21 @@ func (a *App) LoginToDefaultServer() error {
 
 func (a *App) Shutdown() {
 	a.Player.Stop()
+	a.Config.LocalPlayback.Volume = a.Player.GetVolume()
 	a.cancel()
 	a.Player.Destroy()
+	a.Config.WriteConfigFile(configPath())
 }
 
 func configPath() string {
 	return path.Join(configdir.LocalConfig(AppName), configFile)
 }
+
+func clamp(i, min, max int) int {
+	if i < min {
+		i = min
+	} else if i > max {
+		i = max
+	}
+	return i
+}

backend/config.go

@@ -32,12 +32,17 @@ type PlaylistPageConfig struct {
 	TracklistColumns []string
 }
 
+type LocalPlaybackConfig struct {
+	Volume int
+}
+
 type Config struct {
 	Application    AppConfig
 	Servers        []*ServerConfig
 	AlbumPage      AlbumPageConfig
 	NowPlayingPage NowPlayingPageConfig
 	PlaylistPage   PlaylistPageConfig
+	LocalPlayback  LocalPlaybackConfig
 }
 
 func DefaultConfig() *Config {
@@ -55,6 +60,9 @@ func DefaultConfig() *Config {
 		PlaylistPage: PlaylistPageConfig{
 			TracklistColumns: []string{"Artist", "Album", "Time", "Plays"},
 		},
+		LocalPlayback: LocalPlaybackConfig{
+			Volume: 100,
+		},
 	}
 }
 

main.go

@@ -63,6 +63,5 @@ func main() {
 	fyneApp.Run()
 
 	// shutdown tasks
-	myApp.Config.WriteConfigFile(configPath())
 	myApp.Shutdown()
 }

ui/bottompanel.go

@@ -64,7 +64,7 @@ func NewBottomPanel(p *player.Player, nav func(browsing.Route)) *BottomPanel {
 		p.Seek(fmt.Sprintf("%d", int(f*100)), player.SeekAbsolutePercent)
 	})
 
-	bp.AuxControls = widgets.NewAuxControls()
+	bp.AuxControls = widgets.NewAuxControls(p.GetVolume())
 	bp.AuxControls.VolumeControl.OnVolumeChanged = func(v int) {
 		_ = p.SetVolume(v)
 	}

ui/widgets/auxcontrols.go

@@ -17,9 +17,9 @@ type AuxControls struct {
 	container *fyne.Container
 }
 
-func NewAuxControls() *AuxControls {
+func NewAuxControls(initialVolume int) *AuxControls {
 	a := &AuxControls{
-		VolumeControl: NewVolumeControl(),
+		VolumeControl: NewVolumeControl(initialVolume),
 	}
 	a.container = container.NewHBox(layout.NewSpacer(), a.VolumeControl)
 	return a
@@ -97,16 +97,16 @@ type VolumeControl struct {
 	container *fyne.Container
 }
 
-func NewVolumeControl() *VolumeControl {
+func NewVolumeControl(initialVol int) *VolumeControl {
 	v := &VolumeControl{}
 	v.ExtendBaseWidget(v)
 	v.icon = newTappableIcon(theme.VolumeUpIcon())
 	v.icon.OnTapped = v.toggleMute
 	v.slider = NewVolumeSlider(100)
-	v.lastVol = 100
+	v.lastVol = initialVol
 	v.slider.Step = 1
 	v.slider.Orientation = widget.Horizontal
-	v.slider.Value = 100
+	v.slider.Value = float64(v.lastVol)
 	v.slider.OnChanged = v.onChanged
 	v.container = container.NewHBox(container.NewCenter(v.icon), v.slider)
 	return v