connect replaygain config UI to config object

ui/dialogs/settingsdialog.go

@@ -4,6 +4,7 @@ import (
 	"math"
 	"strconv"
 	"supersonic/backend"
+	"supersonic/ui/layouts"
 	"supersonic/ui/widgets"
 	"unicode"
 
@@ -124,18 +125,78 @@ func (s *SettingsDialog) createGeneralTab() *container.TabItem {
 
 func (s *SettingsDialog) createPlaybackTab() *container.TabItem {
 	replayGainSelect := widget.NewSelect([]string{"None", "Album", "Track"}, nil)
+	replayGainSelect.OnChanged = func(_ string) {
+		switch replayGainSelect.SelectedIndex() {
+		case 0:
+			s.config.ReplayGain.Mode = backend.ReplayGainNone
+		case 1:
+			s.config.ReplayGain.Mode = backend.ReplayGainAlbum
+		case 2:
+			s.config.ReplayGain.Mode = backend.ReplayGainTrack
+		}
+		s.onReplayGainSettingsChanged()
+	}
+
+	// set initially selected option
+	switch s.config.ReplayGain.Mode {
+	case backend.ReplayGainAlbum:
+		replayGainSelect.SetSelectedIndex(1)
+	case backend.ReplayGainTrack:
+		replayGainSelect.SetSelectedIndex(2)
+	default:
+		replayGainSelect.SetSelectedIndex(0)
+	}
+
+	preampGain := widgets.NewTextRestrictedEntry(func(curText string, r rune) bool {
+		return (curText == "" && r == '-') ||
+			(curText == "" && unicode.IsDigit(r)) ||
+			((curText == "-" || curText == "0") && unicode.IsDigit(r))
+	})
+	preampGain.SetMinCharWidth(2)
+	preampGain.OnChanged = func(text string) {
+		if f, err := strconv.ParseFloat(text, 64); err == nil {
+			s.config.ReplayGain.PreampGainDB = f
+			s.onReplayGainSettingsChanged()
+		}
+	}
+	initVal := math.Round(s.config.ReplayGain.PreampGainDB)
+	if initVal < -9 {
+		initVal = -9
+	} else if initVal > 9 {
+		initVal = 9
+	}
+	preampGain.Text = strconv.Itoa(int(initVal))
+
+	preventClipping := widget.NewCheckWithData("", binding.BindBool(&s.config.ReplayGain.PreventClipping))
+	preventClipping.OnChanged = func(_ bool) { s.onReplayGainSettingsChanged() }
+
+	audioExclusive := widget.NewCheckWithData("Audio exclusive mode", binding.BindBool(&s.config.LocalPlayback.AudioExclusive))
+	audioExclusive.OnChanged = func(_ bool) { s.onAudioExclusiveSettingsChanged() }
 
 	return container.NewTabItem("Playback", container.NewVBox(
 		widget.NewRichText(&widget.TextSegment{Text: "ReplayGain", Style: boldStyle}),
 		container.New(layout.NewFormLayout(),
 			widget.NewLabel("ReplayGain mode"), replayGainSelect,
-			widget.NewLabel("Prevent clipping"), widget.NewCheckWithData("", binding.BindBool(&s.config.ReplayGain.PreventClipping)),
+			widget.NewLabel("ReplayGain preamp"), container.NewHBox(preampGain, widget.NewLabel("dB")),
+			widget.NewLabel("Prevent clipping"), container.NewHBox(preventClipping, layout.NewSpacer()),
 		),
-		widget.NewSeparator(),
-		widget.NewCheckWithData("Audio exclusive mode", binding.BindBool(&s.config.LocalPlayback.AudioExclusive)),
+		container.New(&layouts.MaxPadLayout{PadLeft: 15, PadRight: 15}, widget.NewSeparator()),
+		container.NewHBox(audioExclusive, layout.NewSpacer()),
 	))
 }
 
+func (s *SettingsDialog) onReplayGainSettingsChanged() {
+	if s.OnReplayGainSettingsChanged != nil {
+		s.OnReplayGainSettingsChanged()
+	}
+}
+
+func (s *SettingsDialog) onAudioExclusiveSettingsChanged() {
+	if s.OnAudioExclusiveSettingChanged != nil {
+		s.OnAudioExclusiveSettingChanged()
+	}
+}
+
 func (s *SettingsDialog) CreateRenderer() fyne.WidgetRenderer {
 	return widget.NewSimpleRenderer(s.content)
 }