add tracklist focus handler

2023-03-04 14:17:42 -08:00
parent 4eddf262cb
commit 773d5a65bb
4 changed files with 108 additions and 39 deletions
@@ -0,0 +1,94 @@
+package widgets
+
+import (
+	"time"
+
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/canvas"
+	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/theme"
+	"fyne.io/fyne/v2/widget"
+)
+
+var _ fyne.Tappable = (*ListRowBase)(nil)
+var _ fyne.Widget = (*ListRowBase)(nil)
+var _ fyne.Focusable = (*ListRowBase)(nil)
+
+type ListRowBase struct {
+	widget.BaseWidget
+
+	Content  fyne.CanvasObject
+	Selected bool
+	Focused  bool
+
+	OnTapped       func()
+	OnDoubleTapped func()
+
+	tappedAt      int64 // unixMillis
+	focusedRect   *canvas.Rectangle
+	selectionRect *canvas.Rectangle
+}
+
+// We implement our own double tapping so that the Tapped behavior
+// can be triggered instantly.
+func (l *ListRowBase) Tapped(*fyne.PointEvent) {
+	prevTap := l.tappedAt
+	l.tappedAt = time.Now().UnixMilli()
+	if l.tappedAt-prevTap < 300 {
+		if l.OnDoubleTapped != nil {
+			l.OnDoubleTapped()
+		}
+	} else {
+		if l.OnTapped != nil {
+			l.OnTapped()
+		}
+	}
+}
+
+func (l *ListRowBase) FocusGained() {
+	l.Focused = true
+	l.Refresh()
+}
+
+func (l *ListRowBase) FocusLost() {
+	l.Focused = false
+	l.Refresh()
+}
+
+func (l *ListRowBase) TypedKey(e *fyne.KeyEvent) {
+	switch {
+	case e.Name == fyne.KeySpace:
+		if l.OnTapped != nil {
+			l.OnTapped()
+		}
+	case e.Name == fyne.KeyReturn || e.Name == fyne.KeyEnter:
+		if l.OnDoubleTapped != nil {
+			l.OnDoubleTapped()
+		} else if l.OnTapped != nil {
+			l.OnTapped()
+		}
+	}
+}
+
+func (l *ListRowBase) TypedRune(r rune) {
+}
+
+func (l *ListRowBase) Refresh() {
+	l.focusedRect.Hidden = !l.Focused
+	l.selectionRect.Hidden = !l.Selected
+	l.BaseWidget.Refresh()
+}
+
+func (l *ListRowBase) CreateRenderer() fyne.WidgetRenderer {
+	if l.selectionRect == nil {
+		l.selectionRect = canvas.NewRectangle(theme.SelectionColor())
+		l.selectionRect.Hidden = !l.Selected
+	}
+	if l.focusedRect == nil {
+		l.focusedRect = canvas.NewRectangle(theme.HoverColor())
+		l.focusedRect.Hidden = !l.Focused
+	}
+	return widget.NewSimpleRenderer(
+		container.NewMax(l.selectionRect, l.focusedRect, l.Content),
+	)
+}