Method DragDrop

core/tree.go:1522–1539

DragDrop handles drag drop event

(e events.Event)

// DragDrop handles drag drop event
func (tr *Tree) DragDrop(e events.Event) {
	// todo: some kind of validation for source
	tr.UnselectAll()
	de := e.(*events.DragDrop)
	stv := AsTree(de.Source.(Widget))
	if stv != nil {
		stv.dragClearStates()
	}
	md := de.Data.(mimedata.Mimes)
	mf := func(m *Scene) {
		tr.Scene.Events.dragMenuAddModText(m, de.DropMod)
		tr.makePasteMenu(m, md, func() {
			tr.DropFinalize(de)
		})
	}
	pos := tr.ContextMenuPos(nil)
	NewMenu(mf, tr.This.(Widget), pos).Run()
}

// DropFinalize is called to finalize Drop actions on the Source node.
// Only relevant for DropMod == DropMove.