change sort selector to button on Albums page

ui/widgets/sortchooserbutton.go

@@ -0,0 +1,100 @@
+package widgets
+
+import (
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/lang"
+	"fyne.io/fyne/v2/widget"
+	"github.com/dweymouth/supersonic/ui/theme"
+)
+
+type SortChooserButton struct {
+	widget.BaseWidget
+
+	Sorts     []string
+	AlignLeft bool
+
+	OnChanged func(selIndex int)
+
+	disabled      bool
+	selectedIndex int
+	btn           *IconButton
+}
+
+func NewSortChooserButton(sorts []string, onChanged func(selIdx int)) *SortChooserButton {
+	s := &SortChooserButton{Sorts: sorts, OnChanged: onChanged}
+	s.ExtendBaseWidget(s)
+	return s
+}
+
+func (s *SortChooserButton) SelectedIndex() int {
+	return s.selectedIndex
+}
+
+func (s *SortChooserButton) SetSelectedIndex(idx int) {
+	if idx < 0 || idx > len(s.Sorts)-1 {
+		return
+	}
+
+	s.selectedIndex = idx
+}
+
+func (s *SortChooserButton) Disable() {
+	if !s.disabled {
+		s.disabled = true
+		s.Refresh()
+	}
+}
+
+func (s *SortChooserButton) Enable() {
+	if s.disabled {
+		s.disabled = false
+		s.Refresh()
+	}
+}
+
+func (s *SortChooserButton) Disabled() bool {
+	return s.disabled
+}
+
+func (s *SortChooserButton) Refresh() {
+	if s.btn != nil {
+		if s.disabled {
+			s.btn.Disable()
+		} else {
+			s.btn.Enable()
+		}
+	}
+	s.BaseWidget.Refresh()
+}
+
+func (s *SortChooserButton) CreateRenderer() fyne.WidgetRenderer {
+	s.btn = NewIconButton(theme.SortIcon, s.showMenu)
+	s.btn.SetToolTip(lang.L("Sort"))
+	return widget.NewSimpleRenderer(s.btn)
+}
+
+func (s *SortChooserButton) showMenu() {
+	m := fyne.NewMenu("")
+	for i, lbl := range s.Sorts {
+		_i := i
+		item := fyne.NewMenuItem(lbl, func() {
+			s.selectedIndex = _i
+			if s.OnChanged != nil {
+				s.OnChanged(_i)
+			}
+		})
+		if i == s.selectedIndex {
+			item.Checked = true
+		}
+		m.Items = append(m.Items, item)
+	}
+	btnPos := fyne.CurrentApp().Driver().AbsolutePositionForObject(s)
+	btnSize := s.Size()
+	pop := widget.NewPopUpMenu(m, fyne.CurrentApp().Driver().CanvasForObject(s))
+	menuW := pop.MinSize().Width
+	if s.AlignLeft {
+		pop.ShowAtPosition(fyne.NewPos(btnPos.X+btnSize.Width-menuW, btnPos.Y+btnSize.Height))
+	} else {
+		pop.ShowAtPosition(fyne.NewPos(btnPos.X, btnPos.Y+btnSize.Height))
+	}
+}