Method Open

core/tree.go:1121–1134

Open opens the given node and updates the tree accordingly (if it is not already opened). It calls OnOpen in the [Treer] interface for extensible actions.

()

// (if it is not already opened). It calls OnOpen in the [Treer]
// interface for extensible actions.
func (tr *Tree) Open() {
	if !tr.Closed || tr.inOpen || tr.This == nil {
		return
	}
	tr.inOpen = true
	if tr.This.(Treer).CanOpen() {
		tr.SetClosed(false)
		tr.setBranchState()
		tr.setChildrenVisibility(false)
		tr.This.(Treer).OnOpen()
	}
	tr.inOpen = false
	tr.NeedsLayout()
}

// ToggleClose toggles the close / open status: if closed, opens, and vice-versa.
func (tr *Tree) ToggleClose() {