add disabling of sorting where appropriate

ui/browsing/playlistspage.go

@@ -290,6 +290,7 @@ func (p *PlaylistList) buildHeader() {
 		{"Description", false, false},
 		{"Owner", false, false},
 		{"Track Count", true, false}}, p.columnsLayout)
+	p.header.DisableSorting = true
 
 }
 

ui/browsing/trackspage.go

@@ -44,6 +44,7 @@ func NewTracksPage(contr *controller.Controller, conf *backend.TracksPageConfig,
 	t.ExtendBaseWidget(t)
 
 	t.tracklist = widgets.NewTracklist(nil)
+	t.tracklist.DisableSorting = true
 	t.tracklist.AutoNumber = true
 	t.tracklist.SetVisibleColumns(conf.TracklistColumns)
 	t.tracklist.OnVisibleColumnsChanged = func(cols []string) {

ui/widgets/artistgenrelist.go

@@ -66,6 +66,7 @@ func NewArtistGenreList(items []ArtistGenreListItemModel) *ArtistGenreList {
 	a.ExtendBaseWidget(a)
 	a.hdr = NewListHeader([]ListColumn{
 		{"Name", false, false}, {"Album Count", true, false}, {"Track Count", true, false}}, a.columnsLayout)
+	a.hdr.DisableSorting = true
 	a.list = widget.NewList(
 		func() int { return len(a.Items) },
 		func() fyne.CanvasObject {

ui/widgets/listheader.go

@@ -32,6 +32,8 @@ type ListColumn struct {
 type ListHeader struct {
 	widget.BaseWidget
 
+	DisableSorting bool
+
 	OnColumnSortChanged         func(int, ColumnSort)
 	OnColumnVisibilityChanged   func(int, bool)
 	OnColumnVisibilityMenuShown func(*widget.PopUp)
@@ -77,7 +79,7 @@ func (l *ListHeader) SetColumnVisible(colNum int, visible bool) {
 
 func (l *ListHeader) buildColumns() {
 	for i, c := range l.columns {
-		hdr := newColHeader(c)
+		hdr := newColHeader(c, &l.DisableSorting)
 		hdr.OnSortChanged = func(i int) func(ColumnSort) {
 			return func(sort ColumnSort) { l.onSortChanged(i, sort) }
 		}(i)
@@ -158,6 +160,7 @@ type colHeader struct {
 	OnSortChanged     func(ColumnSort)
 	OnTappedSecondary func(*fyne.PointEvent)
 
+	sortDisabled *bool
 	columnCfg    ListColumn
 
 	label             *widget.RichText
@@ -166,8 +169,8 @@ type colHeader struct {
 	container         *fyne.Container
 }
 
-func newColHeader(columnCfg ListColumn) *colHeader {
-	c := &colHeader{columnCfg: columnCfg}
+func newColHeader(columnCfg ListColumn, sortDisabled *bool) *colHeader {
+	c := &colHeader{columnCfg: columnCfg, sortDisabled: sortDisabled}
 	c.ExtendBaseWidget(c)
 
 	c.label = widget.NewRichTextWithText(columnCfg.Text)
@@ -186,6 +189,9 @@ func newColHeader(columnCfg ListColumn) *colHeader {
 }
 
 func (c *colHeader) Tapped(*fyne.PointEvent) {
+	if *c.sortDisabled {
+		return
+	}
 	switch c.Sort {
 	case SortNone:
 		c.Sort = SortAscending
@@ -218,7 +224,7 @@ func (c *colHeader) Refresh() {
 	if c.Sort > 0 && c.sortIcon.Hidden {
 		c.sortIcon.Show()
 		c.container.Add(c.sortIconNegSpacer)
-	} else if c.Sort == SortNone && !c.sortIcon.Hidden {
+	} else if (c.Sort == SortNone || *c.sortDisabled) && !c.sortIcon.Hidden {
 		c.sortIcon.Hide()
 		c.container.Remove(c.sortIconNegSpacer)
 	}

ui/widgets/tracklist.go

@@ -61,6 +61,9 @@ type Tracklist struct {
 	// the tracklist context menu.
 	DisablePlaybackMenu bool
 
+	// Disables sorting the tracklist by clicking individual columns.
+	DisableSorting bool
+
 	// user action callbacks
 	OnPlayTrackAt   func(int)
 	OnPlaySelection func(tracks []*mediaprovider.Track, shuffle bool)
@@ -92,7 +95,7 @@ type Tracklist struct {
 }
 
 func NewTracklist(tracks []*mediaprovider.Track) *Tracklist {
-	t := &Tracklist{tracks: tracks, visibleColumns: make([]bool, 12)}
+	t := &Tracklist{tracks: tracks, tracksOrigOrder: tracks, visibleColumns: make([]bool, 12)}
 
 	t.ExtendBaseWidget(t)
 	t.selectionMgr = util.NewListSelectionManager(t.lenTracks)
@@ -348,6 +351,11 @@ func (t *Tracklist) CreateRenderer() fyne.WidgetRenderer {
 	return widget.NewSimpleRenderer(t.container)
 }
 
+func (t *Tracklist) Refresh() {
+	t.hdr.DisableSorting = t.DisableSorting
+	t.BaseWidget.Refresh()
+}
+
 func (t *Tracklist) onPlayTrackAt(idx int) {
 	if t.OnPlayTrackAt != nil {
 		t.OnPlayTrackAt(idx)