How to use gui drop-down

[WIZ4]

I can not register click to item in drop-down

Code: Select all

frame.add{type = "drop-down", name = "drop_down_button"}
frame.drop_down_button.add_item("drop_down_1",1)

Code: Select all

script.on_event(defines.events.on_gui_click, function(event)
local player = game.players[event.element.player_index]
local name = event.element.name
local frame = player.gui.center["frame"]
if (name == "drop_down_1") then
player.print("text")
end
end)

When I click on an item nothing happens. How can I do this differently?

[Bilka]

http://lua-api.factorio.com/latest/even ... te_changed

[WIZ4]

Thanks