add top tracks view to artist page

ui/widgets/toggletext.go

@@ -0,0 +1,67 @@
+package widgets
+
+import (
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/widget"
+)
+
+type ToggleText struct {
+	widget.BaseWidget
+
+	OnChanged func(int)
+
+	labels         []string
+	activeLabelIdx int
+	container      *fyne.Container
+}
+
+func NewToggleText(activeLblIdx int, labels []string) *ToggleText {
+	t := &ToggleText{labels: labels, activeLabelIdx: activeLblIdx}
+	t.ExtendBaseWidget(t)
+	t.container = container.NewHBox()
+	for i, lbl := range labels {
+		if i == activeLblIdx {
+			t.container.Add(t.newBoldRichText(lbl))
+		} else {
+			hl := widget.NewHyperlink(lbl, nil)
+			hl.OnTapped = t.buildOnTapped(i)
+			t.container.Add(hl)
+		}
+	}
+	return t
+}
+
+func (t *ToggleText) buildOnTapped(i int) func() {
+	return func() {
+		t.onActivated(i)
+	}
+}
+
+func (t *ToggleText) newBoldRichText(text string) *widget.RichText {
+	return widget.NewRichText(&widget.TextSegment{
+		Text:  text,
+		Style: widget.RichTextStyle{TextStyle: fyne.TextStyle{Bold: true}},
+	})
+}
+
+func (t *ToggleText) onActivated(idx int) {
+	if idx == t.activeLabelIdx {
+		return
+	}
+	// update old label to hyperlink
+	hl := widget.NewHyperlink(t.labels[t.activeLabelIdx], nil)
+	hl.OnTapped = t.buildOnTapped(t.activeLabelIdx)
+	t.container.Objects[t.activeLabelIdx] = hl
+	// update activated label to bold text
+	t.container.Objects[idx] = t.newBoldRichText(t.labels[idx])
+	t.activeLabelIdx = idx
+	t.Refresh()
+	if t.OnChanged != nil {
+		t.OnChanged(t.activeLabelIdx)
+	}
+}
+
+func (t *ToggleText) CreateRenderer() fyne.WidgetRenderer {
+	return widget.NewSimpleRenderer(t.container)
+}