Method Init

core/tree.go:196–474

()

}

func (tr *Tree) Init() {
	tr.WidgetBase.Init()
	tr.AddContextMenu(tr.contextMenu)
	tr.IconOpen = icons.KeyboardArrowDown
	tr.IconClosed = icons.KeyboardArrowRight
	tr.IconLeaf = icons.Blank
	tr.OpenDepth = 4
	tr.Styler(func(s *styles.Style) {
		// our parts are draggable and droppable, not us ourself
		s.SetAbilities(true, abilities.Activatable, abilities.Focusable, abilities.Selectable, abilities.Hoverable)
		tr.Indent.Em(1)
		s.Border.Style.Set(styles.BorderNone)
		s.Border.Radius = styles.BorderRadiusFull
		s.MaxBorder = s.Border
		// s.Border.Width.Left.SetDp(1)
		// s.Border.Color.Left = colors.Scheme.OutlineVariant
		s.Margin.Zero()
		s.Padding.Left.Dp(ConstantSpacing(4))
		s.Padding.SetVertical(units.Dp(4))
		s.Padding.Right.Zero()
		s.Text.Align = styles.Start

		// need to copy over to actual and then clear styles one
		if s.Is(states.Selected) {
			// render handles manually, similar to with actStateLayer
			s.Background = nil
		} else {
			s.Color = colors.Scheme.OnSurface
		}
	})
	tr.FinalStyler(func(s *styles.Style) {
		tr.actStateLayer = s.StateLayer
		s.StateLayer = 0
	})

	// We let the parts handle our state
	// so that we only get it when we are doing
	// something with this tree specifically,
	// not with any of our children (see OnChildAdded).
	// we only need to handle the starting ones here,
	// as the other ones will just set the state to
	// false, which it already is.
	tr.On(events.MouseEnter, func(e events.Event) { e.SetHandled() })
	tr.On(events.MouseLeave, func(e events.Event) { e.SetHandled() })
	tr.On(events.MouseDown, func(e events.Event) { e.SetHandled() })
	tr.OnClick(func(e events.Event) { e.SetHandled() })
	tr.On(events.DragStart, func(e events.Event) { e.SetHandled() })
	tr.On(events.DragEnter, func(e events.Event) { e.SetHandled() })
	tr.On(events.DragLeave, func(e events.Event) { e.SetHandled() })
	tr.On(events.Drop, func(e events.Event) { e.SetHandled() })
	tr.On(events.DropDeleteSource, func(e events.Event) { e.SetHandled() })
	tr.On(events.KeyChord, func(e events.Event) {
		kf := keymap.Of(e.KeyChord())
		selMode := events.SelectModeBits(e.Modifiers())
		if DebugSettings.KeyEventTrace {
			slog.Info("Tree KeyInput", "widget", tr, "keyFunction", kf, "selMode", selMode)
		}