TreeItem.previous

TreeItem.previous readonly

Retrieves the previous sibling item before the TreeItem

Example


--! luart-extensions
import ui

-- create a fixed Window
local win = ui.Window("TreeItem.previous sample", 320, 220)

local tree = ui.Tree(win, {"TreeItem1", "TreeItem2", "TreeItem3"}, 60, 40, 200, 160)
tree.selected = tree.items["TreeItem1"]
tree.selected.subitems = {"SubItem1", "SubItem2"}

ui.Button(win, "Next", 76, 10).onClick = function (self)
  local next = tree.selected.next
  if next then
    tree.selected = next
  end
end

ui.Button(win, "Previous", 156, 10).onClick = function (self)
  local prev = tree.selected.previous
  if prev then
    tree.selected = prev
  end
end

await win:showasync()