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listrowbase.go
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listrowbase.go
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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)
// Base type used for all list rows in widgets such as Tracklist, etc.
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),
)
}