beginning of star rating widget

ui/widgets/starrating.go

@@ -0,0 +1,71 @@
+package widgets
+
+import (
+	"supersonic/res"
+	"supersonic/ui/layouts"
+
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/canvas"
+	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/widget"
+)
+
+type StarRating struct {
+	widget.BaseWidget
+
+	Rating   int
+	StarSize float32
+
+	container *fyne.Container
+}
+
+func NewStarRating() *StarRating {
+	s := &StarRating{}
+	s.ExtendBaseWidget(s)
+	return s
+}
+
+func (s *StarRating) createContainer() {
+	s.container = container.New(&layouts.HboxCustomPadding{
+		DisableThemePad: true,
+		ExtraPad:        2,
+	})
+	var im *canvas.Image
+	for i := 0; i < 5; i++ {
+		if s.Rating > i {
+			im = canvas.NewImageFromResource(res.ResStarFilledInvertPng)
+		} else {
+			im = canvas.NewImageFromResource(res.ResStarOutlineInvertPng)
+		}
+		im.SetMinSize(fyne.NewSize(s.StarSize, s.StarSize))
+		s.container.Add(im)
+	}
+}
+
+func (s *StarRating) Refresh() {
+	// widget has not had renderer created yet
+	if s.container == nil {
+		return
+	}
+	for i := 0; i < 5; i++ {
+		im := s.container.Objects[i].(*canvas.Image)
+		im.SetMinSize(fyne.NewSize(s.StarSize, s.StarSize))
+		if s.Rating > i {
+			im.Resource = res.ResStarFilledInvertPng
+		} else {
+			im.Resource = res.ResStarOutlineInvertPng
+		}
+	}
+	s.BaseWidget.Refresh()
+}
+
+func (s *StarRating) MinSize() fyne.Size {
+	return fyne.NewSize(s.StarSize*5, s.StarSize)
+}
+
+func (s *StarRating) CreateRenderer() fyne.WidgetRenderer {
+	if s.container == nil {
+		s.createContainer()
+	}
+	return widget.NewSimpleRenderer(container.NewCenter(s.container))
+}